diff --git a/android/build.gradle.kts b/android/build.gradle.kts
index 2b625c84..0dd296d4 100644
--- a/android/build.gradle.kts
+++ b/android/build.gradle.kts
@@ -51,19 +51,10 @@ dependencies {
     implementation(libs.androidx.constraintlayout)
     implementation(libs.mapbox.maps)
     implementation(project(":math"))
-    implementation(project(":orx-triangulation")) {
-        exclude(group = "org.openrndr", module = "openrndr-draw")
-    }
     implementation(libs.androidx.lifecycle.runtime.ktx)
     implementation(project(":icegps-common"))
     implementation(project(":icegps-shared"))
-    implementation(project(":orx-marching-squares"))
-    implementation(project(":orx-palette")) {
-        exclude(group = "org.openrndr", module = "openrndr-draw")
-    }
-    implementation(project(":orx-shapes")) {
-        exclude(group = "org.openrndr", module = "openrndr-draw")
-    }
+    implementation(project(":icegps-triangulation"))
 
     testImplementation(libs.junit)
     androidTestImplementation(libs.ext.junit)
diff --git a/android/src/main/java/com/icegps/orx/ContoursManager.kt b/android/src/main/java/com/icegps/orx/ContoursManager.kt
index 4019713b..ba860cbc 100644
--- a/android/src/main/java/com/icegps/orx/ContoursManager.kt
+++ b/android/src/main/java/com/icegps/orx/ContoursManager.kt
@@ -4,14 +4,19 @@ import ColorBrewer2Type
 import android.content.Context
 import android.util.Log
 import colorBrewer2Palettes
+import com.icegps.math.geometry.Rectangle
+import com.icegps.math.geometry.Vector2D
 import com.icegps.math.geometry.Vector3D
+import com.icegps.orx.catmullrom.CatmullRomChain2
 import com.icegps.orx.ktx.area
 import com.icegps.orx.ktx.toColorInt
 import com.icegps.orx.ktx.toMapboxPoint
 import com.icegps.orx.ktx.toast
-import com.icegps.orx.triangulation.DelaunayTriangulation3D
-import com.icegps.orx.triangulation.Triangle3D
+import com.icegps.orx.marchingsquares.ShapeContour
+import com.icegps.orx.marchingsquares.findContours
 import com.icegps.shared.ktx.TAG
+import com.icegps.triangulation.DelaunayTriangulation
+import com.icegps.triangulation.Triangle
 import com.mapbox.geojson.Feature
 import com.mapbox.geojson.FeatureCollection
 import com.mapbox.geojson.LineString
@@ -35,11 +40,6 @@ import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
-import org.openrndr.extra.shapes.splines.CatmullRomChain2
-import org.openrndr.math.Vector2
-import org.openrndr.math.Vector3
-import org.openrndr.shape.Rectangle
-import org.openrndr.shape.ShapeContour
 import kotlin.math.max
 
 class ContoursManager(
@@ -136,7 +136,7 @@ class ContoursManager(
         }
     }
 
-    private var triangles: List<Triangle3D> = listOf()
+    private var triangles: List<Triangle> = listOf()
     private var isTriangleVisible: Boolean = true
 
     fun setTriangleVisible(visible: Boolean) {
@@ -170,10 +170,9 @@ class ContoursManager(
                 val zip = (0..contourSize).map { index ->
                     heightRange.start + index * step
                 }.zipWithNext { a, b -> a..b }
-                val points = points.map { Vector3(it.x, it.y, it.z) }
                 val area = points.area
-                val triangulation = DelaunayTriangulation3D(points)
-                val triangles: MutableList<Triangle3D> = triangulation.triangles()
+                val triangulation = DelaunayTriangulation(points)
+                val triangles = triangulation.triangles()
                 val cellSize: Double = if (cellSize == null || cellSize!! < 0.1) {
                     (max(triangulation.points.area.width, triangulation.points.area.height) / 50)
                 } else {
@@ -228,12 +227,12 @@ class ContoursManager(
     }
 
     fun findContours(
-        triangles: MutableList<Triangle3D>,
+        triangles: List<Triangle>,
         range: ClosedFloatingPointRange<Double>,
         area: Rectangle,
         cellSize: Double
     ): List<ShapeContour> {
-        return org.openrndr.extra.marchingsquares.findContours(
+        return findContours(
             f = { v ->
                 val triangle = triangles.firstOrNull { triangle ->
                     isPointInTriangle3D(v, listOf(triangle.x1, triangle.x2, triangle.x3))
@@ -370,7 +369,7 @@ class ContoursManager(
     }
 }
 
-fun isPointInTriangle3D(point: Vector2, triangle: List<Vector3>): Boolean {
+fun isPointInTriangle3D(point: Vector2D, triangle: List<Vector3D>): Boolean {
     require(triangle.size == 3) { "三角形必须有3个顶点" }
 
     val (v1, v2, v3) = triangle
@@ -395,15 +394,15 @@ fun isPointInTriangle3D(point: Vector2, triangle: List<Vector3>): Boolean {
  * @param triangle 三角形的三个顶点
  * @return 三维点 (x, y, z)
  */
-fun interpolateHeight(point: Vector2, triangle: List<Vector3>): Vector3 {
+fun interpolateHeight(point: Vector2D, triangle: List<Vector3D>): Vector3D {
     /**
      * 计算点在三角形中的重心坐标
      */
     fun calculateBarycentricCoordinates(
-        point: Vector2,
-        v1: Vector3,
-        v2: Vector3,
-        v3: Vector3
+        point: Vector2D,
+        v1: Vector3D,
+        v2: Vector3D,
+        v3: Vector3D
     ): Triple<Double, Double, Double> {
         val denom = (v2.y - v3.y) * (v1.x - v3.x) + (v3.x - v2.x) * (v1.y - v3.y)
 
@@ -424,5 +423,5 @@ fun interpolateHeight(point: Vector2, triangle: List<Vector3>): Vector3 {
     // 使用重心坐标插值z值
     val z = alpha * v1.z + beta * v2.z + gamma * v3.z
 
-    return Vector3(point.x, point.y, z)
+    return Vector3D(point.x, point.y, z)
 }
diff --git a/android/src/main/java/com/icegps/orx/GridModel.kt b/android/src/main/java/com/icegps/orx/GridModel.kt
index 538c6932..eae4e661 100644
--- a/android/src/main/java/com/icegps/orx/GridModel.kt
+++ b/android/src/main/java/com/icegps/orx/GridModel.kt
@@ -1,8 +1,8 @@
 package com.icegps.orx
 
 import com.icegps.math.geometry.Vector2D
-import com.icegps.orx.triangulation.DelaunayTriangulation3D
-import org.openrndr.math.Vector3
+import com.icegps.math.geometry.Vector3D
+import com.icegps.triangulation.DelaunayTriangulation
 import kotlin.math.absoluteValue
 import kotlin.math.ceil
 
@@ -29,11 +29,11 @@ data class GridModel(
 }
 
 fun triangulationToGrid(
-    delaunator: DelaunayTriangulation3D,
+    delaunator: DelaunayTriangulation,
     cellSize: Double = 50.0,
     maxSidePixels: Int = 5000
 ): GridModel {
-    fun pointInTriangle(pt: Vector2D, a: Vector3, b: Vector3, c: Vector3): Boolean {
+    fun pointInTriangle(pt: Vector2D, a: Vector3D, b: Vector3D, c: Vector3D): Boolean {
         val v0x = c.x - a.x
         val v0y = c.y - a.y
         val v1x = b.x - a.x
@@ -55,11 +55,11 @@ fun triangulationToGrid(
         return u >= 0 && v >= 0 && u + v <= 1
     }
 
-    fun barycentricInterpolateLegacy(pt: Vector2D, a: Vector3, b: Vector3, c: Vector3, values: DoubleArray): Double {
-        val area = { p1: Vector2D, p2: Vector3, p3: Vector3 ->
+    fun barycentricInterpolateLegacy(pt: Vector2D, a: Vector3D, b: Vector3D, c: Vector3D, values: DoubleArray): Double {
+        val area = { p1: Vector2D, p2: Vector3D, p3: Vector3D ->
             ((p2.x - p1.x) * (p3.y - p1.y) - (p3.x - p1.x) * (p2.y - p1.y)).absoluteValue / 2.0
         }
-        val area2 = { p1: Vector3, p2: Vector3, p3: Vector3 ->
+        val area2 = { p1: Vector3D, p2: Vector3D, p3: Vector3D ->
             ((p2.x - p1.x) * (p3.y - p1.y) - (p3.x - p1.x) * (p2.y - p1.y)).absoluteValue / 2.0
         }
         val areaTotal = area2(a, b, c)
diff --git a/android/src/main/java/com/icegps/orx/PolylineManager.kt b/android/src/main/java/com/icegps/orx/PolylineManager.kt
index aaad304b..ec1a2a0f 100644
--- a/android/src/main/java/com/icegps/orx/PolylineManager.kt
+++ b/android/src/main/java/com/icegps/orx/PolylineManager.kt
@@ -15,7 +15,6 @@ import com.mapbox.maps.extension.style.layers.properties.generated.LineCap
 import com.mapbox.maps.extension.style.layers.properties.generated.LineJoin
 import com.mapbox.maps.extension.style.sources.addSource
 import com.mapbox.maps.extension.style.sources.generated.geoJsonSource
-import org.openrndr.math.YPolarity
 
 class PolylineManager(
     private val mapView: MapView
@@ -99,7 +98,6 @@ class PolylineManager(
 fun fromPoints(
     points: List<Vector3D>,
     closed: Boolean,
-    polarity: YPolarity = YPolarity.CW_NEGATIVE_Y
 ) = if (points.isEmpty()) {
     emptyList()
 } else {
diff --git a/android/src/main/java/com/icegps/orx/catmullrom/CatmullRom.kt b/android/src/main/java/com/icegps/orx/catmullrom/CatmullRom.kt
new file mode 100644
index 00000000..3a093f77
--- /dev/null
+++ b/android/src/main/java/com/icegps/orx/catmullrom/CatmullRom.kt
@@ -0,0 +1,135 @@
+package com.icegps.orx.catmullrom
+
+import com.icegps.math.geometry.Vector2D
+import com.icegps.orx.marchingsquares.Segment2D
+import com.icegps.orx.marchingsquares.ShapeContour
+import kotlin.math.min
+import kotlin.math.pow
+
+private const val almostZero = 0.00000001
+private const val almostOne = 0.99999999
+
+/**
+ * Creates a 2D Catmull-Rom spline curve.
+ *
+ * Can be represented as a segment drawn between [p1] and [p2],
+ * while [p0] and [p3] are used as control points.
+ *
+ * Under some circumstances alpha can have
+ * no perceptible effect, for example,
+ * when creating closed shapes with the vertices
+ * forming a regular 2D polygon.
+ *
+ * @param p0 The first control point.
+ * @param p1 The starting anchor point.
+ * @param p2 The ending anchor point.
+ * @param p3 The second control point.
+ * @param alpha The *tension* of the curve.
+ *      Use `0.0` for the uniform spline, `0.5` for the centripetal spline, `1.0` for the chordal spline.
+ */
+class CatmullRom2(val p0: Vector2D, val p1: Vector2D, val p2: Vector2D, val p3: Vector2D, val alpha: Double = 0.5) {
+    /** Value of t for p0. */
+    val t0: Double = 0.0
+
+    /** Value of t for p1. */
+    val t1: Double = calculateT(t0, p0, p1)
+
+    /** Value of t for p2. */
+    val t2: Double = calculateT(t1, p1, p2)
+
+    /** Value of t for p3. */
+    val t3: Double = calculateT(t2, p2, p3)
+
+    fun position(rt: Double): Vector2D {
+        val t = t1 + rt * (t2 - t1)
+        val a1 = p0 * ((t1 - t) / (t1 - t0)) + p1 * ((t - t0) / (t1 - t0))
+        val a2 = p1 * ((t2 - t) / (t2 - t1)) + p2 * ((t - t1) / (t2 - t1))
+        val a3 = p2 * ((t3 - t) / (t3 - t2)) + p3 * ((t - t2) / (t3 - t2))
+
+        val b1 = a1 * ((t2 - t) / (t2 - t0)) + a2 * ((t - t0) / (t2 - t0))
+        val b2 = a2 * ((t3 - t) / (t3 - t1)) + a3 * ((t - t1) / (t3 - t1))
+
+        val c = b1 * ((t2 - t) / (t2 - t1)) + b2 * ((t - t1) / (t2 - t1))
+        return c
+    }
+
+    private fun calculateT(t: Double, p0: Vector2D, p1: Vector2D): Double {
+        val a = (p1.x - p0.x).pow(2.0) + (p1.y - p0.y).pow(2.0)
+        val b = a.pow(0.5)
+        val c = b.pow(alpha)
+        return c + t
+    }
+}
+
+/**
+ * Calculates the 2D Catmull–Rom spline for a chain of points and returns the combined curve.
+ *
+ * For more details, see [CatmullRom2].
+ *
+ * @param points The [List] of 2D points where [CatmullRom2] is applied in groups of 4.
+ * @param alpha The *tension* of the curve.
+ *      Use `0.0` for the uniform spline, `0.5` for the centripetal spline, `1.0` for the chordal spline.
+ * @param loop Whether to connect the first and last point, such that it forms a closed shape.
+ */
+class CatmullRomChain2(points: List<Vector2D>, alpha: Double = 0.5, val loop: Boolean = false) {
+    val segments = if (!loop) {
+        val startPoints = points.take(2)
+        val endPoints = points.takeLast(2)
+        val mirrorStart =
+            startPoints.first() - (startPoints.last() - startPoints.first()).normalized
+        val mirrorEnd = endPoints.last() + (endPoints.last() - endPoints.first()).normalized
+
+        (listOf(mirrorStart) + points + listOf(mirrorEnd)).windowed(4, 1).map {
+            CatmullRom2(it[0], it[1], it[2], it[3], alpha)
+        }
+    } else {
+        val cleanPoints = if (loop && points.first().distanceTo(points.last()) <= 1.0E-6) {
+            points.dropLast(1)
+        } else {
+            points
+        }
+        (cleanPoints + cleanPoints.take(3)).windowed(4, 1).map {
+            CatmullRom2(it[0], it[1], it[2], it[3], alpha)
+        }
+    }
+
+    fun positions(steps: Int = segments.size * 4): List<Vector2D> {
+        return (0..steps).map {
+            position(it.toDouble() / steps)
+        }
+    }
+
+    fun position(rt: Double): Vector2D {
+        val st = if (loop) rt.mod(1.0) else rt.coerceIn(0.0, 1.0)
+        val segmentIndex = (min(almostOne, st) * segments.size).toInt()
+        val t = (min(almostOne, st) * segments.size) - segmentIndex
+        return segments[segmentIndex].position(t)
+    }
+}
+
+fun List<Vector2D>.catmullRom(alpha: Double = 0.5, closed: Boolean) = CatmullRomChain2(this, alpha, closed)
+
+/** Converts spline to a [Segment]. */
+fun CatmullRom2.toSegment(): Segment2D {
+    val d1a2 = (p1 - p0).length.pow(2 * alpha)
+    val d2a2 = (p2 - p1).length.pow(2 * alpha)
+    val d3a2 = (p3 - p2).length.pow(2 * alpha)
+    val d1a = (p1 - p0).length.pow(alpha)
+    val d2a = (p2 - p1).length.pow(alpha)
+    val d3a = (p3 - p2).length.pow(alpha)
+
+    val b0 = p1
+    val b1 = (p2 * d1a2 - p0 * d2a2 + p1 * (2 * d1a2 + 3 * d1a * d2a + d2a2)) / (3 * d1a * (d1a + d2a))
+    val b2 = (p1 * d3a2 - p3 * d2a2 + p2 * (2 * d3a2 + 3 * d3a * d2a + d2a2)) / (3 * d3a * (d3a + d2a))
+    val b3 = p2
+
+    return Segment2D(b0, b1, b2, b3)
+}
+
+
+/**
+ * Converts chain to a [ShapeContour].
+ */
+@Suppress("unused")
+fun CatmullRomChain2.toContour(): ShapeContour =
+    ShapeContour(segments.map { it.toSegment() }, this.loop)
diff --git a/android/src/main/java/com/icegps/orx/color/ColorRGBa.kt b/android/src/main/java/com/icegps/orx/color/ColorRGBa.kt
new file mode 100644
index 00000000..cd53a619
--- /dev/null
+++ b/android/src/main/java/com/icegps/orx/color/ColorRGBa.kt
@@ -0,0 +1,427 @@
+package com.icegps.orx.color
+
+import com.icegps.math.geometry.Vector3D
+import com.icegps.math.geometry.Vector4D
+import kotlinx.serialization.Serializable
+import kotlin.math.pow
+
+@Serializable
+enum class Linearity(val certainty: Int) {
+    /**
+     * Represents a linear color space.
+     *
+     * LINEAR typically signifies that the values in the color space are in a linear relationship,
+     * meaning there is no gamma correction or transformation applied to the data.
+     */
+    LINEAR(1),
+
+    /**
+     * Represents a standard RGB (sRGB) color space.
+     *
+     * SRGB typically refers to a non-linear color space with gamma correction applied,
+     * designed for consistent color representation across devices.
+     */
+    SRGB(1),
+    ;
+
+    fun leastCertain(other: Linearity): Linearity {
+        return if (this.certainty <= other.certainty) {
+            this
+        } else {
+            other
+        }
+    }
+
+    fun isEquivalent(other: Linearity): Boolean {
+        return this == other
+    }
+
+}
+
+/**
+ * Represents a color in the RGBA color space. Each component, including red, green, blue, and alpha (opacity),
+ * is represented as a `Double` in the range `[0.0, 1.0]`. The color can be defined in either linear or sRGB space,
+ * determined by the `linearity` property.
+ *
+ * This class provides a wide variety of utility functions for manipulating and converting colors, such as shading,
+ * opacity adjustment, and format transformations. It also includes methods for parsing colors from hexadecimal
+ * notation or vectors.
+ *
+ * @property r Red component of the color as a value between `0.0` and `1.0`.
+ * @property g Green component of the color as a value between `0.0` and `1.0`.
+ * @property b Blue component of the color as a value between `0.0` and `1.0`.
+ * @property alpha Alpha (opacity) component of the color as a value between `0.0` and `1.0`. Defaults to `1.0`.
+ * @property linearity Indicates whether the color is defined in linear or sRGB space. Defaults to [Linearity.LINEAR].
+ */
+@Serializable
+@Suppress("EqualsOrHashCode") // generated equals() is ok, only hashCode() needs to be overridden
+data class ColorRGBa(
+    val r: Double,
+    val g: Double,
+    val b: Double,
+    val alpha: Double = 1.0,
+    val linearity: Linearity = Linearity.LINEAR
+) {
+
+    enum class Component {
+        R,
+        G,
+        B
+    }
+
+    companion object {
+        /**
+         * Calculates a color from hexadecimal value. For values with transparency
+         * use the [String] variant of this function.
+         */
+        fun fromHex(hex: Int): ColorRGBa {
+            val r = hex and (0xff0000) shr 16
+            val g = hex and (0x00ff00) shr 8
+            val b = hex and (0x0000ff)
+            return ColorRGBa(r / 255.0, g / 255.0, b / 255.0, 1.0, Linearity.SRGB)
+        }
+
+        /**
+         * Calculates a color from hexadecimal notation, like in CSS.
+         *
+         * Supports the following formats
+         * * `RGB`
+         * * `RGBA`
+         * * `RRGGBB`
+         * * `RRGGBBAA`
+         *
+         * where every character is a valid hex digit between `0..f` (case-insensitive).
+         * Supports leading "#" or "0x".
+         */
+        fun fromHex(hex: String): ColorRGBa {
+            val pos = when {
+                hex.startsWith("#") -> 1
+                hex.startsWith("0x") -> 2
+                else -> 0
+            }
+
+            fun fromHex1(str: String, pos: Int): Double {
+                return 17 * str[pos].digitToInt(16) / 255.0
+            }
+
+            fun fromHex2(str: String, pos: Int): Double {
+                return (16 * str[pos].digitToInt(16) + str[pos + 1].digitToInt(16)) / 255.0
+            }
+            return when (hex.length - pos) {
+                3 -> ColorRGBa(fromHex1(hex, pos), fromHex1(hex, pos + 1), fromHex1(hex, pos + 2), 1.0, Linearity.SRGB)
+                4 -> ColorRGBa(
+                    fromHex1(hex, pos),
+                    fromHex1(hex, pos + 1),
+                    fromHex1(hex, pos + 2),
+                    fromHex1(hex, pos + 3),
+                    Linearity.SRGB
+                )
+
+                6 -> ColorRGBa(fromHex2(hex, pos), fromHex2(hex, pos + 2), fromHex2(hex, pos + 4), 1.0, Linearity.SRGB)
+                8 -> ColorRGBa(
+                    fromHex2(hex, pos),
+                    fromHex2(hex, pos + 2),
+                    fromHex2(hex, pos + 4),
+                    fromHex2(hex, pos + 6),
+                    Linearity.SRGB
+                )
+
+                else -> throw IllegalArgumentException("Invalid hex length/format for '$hex'")
+            }
+        }
+
+        /** @suppress */
+        val PINK = fromHex(0xffc0cb)
+
+        /** @suppress */
+        val BLACK = ColorRGBa(0.0, 0.0, 0.0, 1.0, Linearity.SRGB)
+
+        /** @suppress */
+        val WHITE = ColorRGBa(1.0, 1.0, 1.0, 1.0, Linearity.SRGB)
+
+        /** @suppress */
+        val RED = ColorRGBa(1.0, 0.0, 0.0, 1.0, Linearity.SRGB)
+
+        /** @suppress */
+        val BLUE = ColorRGBa(0.0, 0.0, 1.0, 1.0, Linearity.SRGB)
+
+        /** @suppress */
+        val GREEN = ColorRGBa(0.0, 1.0, 0.0, 1.0, Linearity.SRGB)
+
+        /** @suppress */
+        val YELLOW = ColorRGBa(1.0, 1.0, 0.0, 1.0, Linearity.SRGB)
+
+        /** @suppress */
+        val CYAN = ColorRGBa(0.0, 1.0, 1.0, 1.0, Linearity.SRGB)
+
+        /** @suppress */
+        val MAGENTA = ColorRGBa(1.0, 0.0, 1.0, 1.0, Linearity.SRGB)
+
+        /** @suppress */
+        val GRAY = ColorRGBa(0.5, 0.5, 0.5, 1.0, Linearity.SRGB)
+
+        /** @suppress */
+        val TRANSPARENT = ColorRGBa(0.0, 0.0, 0.0, 0.0, Linearity.LINEAR)
+
+        /**
+         * Create a ColorRGBa object from a [Vector3]
+         * @param vector input vector, `[x, y, z]` is mapped to `[r, g, b]`
+         * @param alpha optional alpha value, default is 1.0
+         */
+        fun fromVector(vector: Vector3D, alpha: Double = 1.0, linearity: Linearity = Linearity.LINEAR): ColorRGBa {
+            return ColorRGBa(vector.x, vector.y, vector.z, alpha, linearity)
+        }
+
+
+        /**
+         * Create a ColorRGBa object from a [Vector4]
+         * @param vector input vector, `[x, y, z, w]` is mapped to `[r, g, b, a]`
+         */
+        fun fromVector(vector: Vector4D, linearity: Linearity = Linearity.LINEAR): ColorRGBa {
+            return ColorRGBa(vector.x, vector.y, vector.z, vector.w, linearity)
+        }
+    }
+
+    @Deprecated("Legacy alpha parameter name", ReplaceWith("alpha"))
+    val a = alpha
+
+    /**
+     * Creates a copy of color with adjusted opacity
+     * @param factor a scaling factor used for the opacity
+     * @return A [ColorRGBa] with scaled opacity
+     * @see shade
+     */
+    fun opacify(factor: Double): ColorRGBa = ColorRGBa(r, g, b, alpha * factor, linearity)
+
+    /**
+     * Creates a copy of color with adjusted color
+     * @param factor a scaling factor used for the opacity
+     * @return A [ColorRGBa] with scaled colors
+     * @see opacify
+     */
+    fun shade(factor: Double): ColorRGBa = ColorRGBa(r * factor, g * factor, b * factor, alpha, linearity)
+
+    /**
+     * Copy of the color with all of its fields clamped to `[0, 1]`
+     */
+
+    @Deprecated("Use clip() instead", replaceWith = ReplaceWith("clip()"))
+    val saturated: ColorRGBa
+        get() = clip()
+
+    /**
+     * Copy of the color with all of its fields clamped to `[0, 1]`
+     */
+    fun clip(): ColorRGBa = copy(
+        r = r.coerceIn(0.0..1.0),
+        g = g.coerceIn(0.0..1.0),
+        b = b.coerceIn(0.0..1.0),
+        alpha = alpha.coerceIn(0.0..1.0)
+    )
+
+
+    /**
+     * Returns a new instance of [ColorRGBa] where the red, green, and blue components
+     * are multiplied by the alpha value of the original color. The alpha value and linearity
+     * remain unchanged.
+     *
+     * This computed property is commonly used for adjusting the color intensity based
+     * on its transparency.
+     */
+    val alphaMultiplied: ColorRGBa
+        get() = ColorRGBa(r * alpha, g * alpha, b * alpha, alpha, linearity)
+
+    /**
+     * The minimum value over `r`, `g`, `b`
+     * @see maxValue
+     */
+    val minValue get() = r.coerceAtMost(g).coerceAtMost(b)
+
+    /**
+     * The maximum value over `r`, `g`, `b`
+     * @see minValue
+     */
+    val maxValue get() = r.coerceAtLeast(g).coerceAtLeast(b)
+
+    /**
+     * calculate luminance value
+     * luminance value is according to <a>https://www.w3.org/TR/2008/REC-WCAG20-20081211/#relativeluminancedef</a>
+     */
+    val luminance: Double
+        get() = when (linearity) {
+            Linearity.SRGB -> toLinear().luminance
+            else -> 0.2126 * r + 0.7152 * g + 0.0722 * b
+        }
+
+    /**
+     * Converts this color to the specified linearity.
+     *
+     * @param linearity The target linearity to which the color should be converted.
+     *                  Supported values are [Linearity.SRGB] and [Linearity.LINEAR].
+     * @return A [ColorRGBa] instance in the specified linearity.
+     */
+    fun toLinearity(linearity: Linearity): ColorRGBa {
+        return when (linearity) {
+            Linearity.SRGB -> toSRGB()
+            Linearity.LINEAR -> toLinear()
+        }
+    }
+
+    /**
+     * calculate the contrast value between this color and the given color
+     * contrast value is accordingo to <a>// see http://www.w3.org/TR/2008/REC-WCAG20-20081211/#contrast-ratiodef</a>
+     */
+    fun getContrastRatio(other: ColorRGBa): Double {
+        val l1 = luminance
+        val l2 = other.luminance
+        return if (l1 > l2) (l1 + 0.05) / (l2 + 0.05) else (l2 + 0.05) / (l1 + 0.05)
+    }
+
+    fun toLinear(): ColorRGBa {
+        fun t(x: Double): Double {
+            return if (x <= 0.04045) x / 12.92 else ((x + 0.055) / (1 + 0.055)).pow(2.4)
+        }
+        return when (linearity) {
+            Linearity.SRGB -> ColorRGBa(t(r), t(g), t(b), alpha, Linearity.LINEAR)
+            else -> this
+        }
+    }
+
+    /**
+     * Convert to SRGB
+     * @see toLinear
+     */
+    fun toSRGB(): ColorRGBa {
+        fun t(x: Double): Double {
+            return if (x <= 0.0031308) 12.92 * x else (1 + 0.055) * x.pow(1.0 / 2.4) - 0.055
+        }
+        return when (linearity) {
+            Linearity.LINEAR -> ColorRGBa(t(r), t(g), t(b), alpha, Linearity.SRGB)
+            else -> this
+        }
+    }
+
+    fun toRGBa(): ColorRGBa = this
+
+    // This is here because the default hashing of enums on the JVM is not stable.
+    override fun hashCode(): Int {
+        var result = r.hashCode()
+        result = 31 * result + g.hashCode()
+        result = 31 * result + b.hashCode()
+        result = 31 * result + alpha.hashCode()
+        // here we overcome the unstable hash by using the ordinal value
+        result = 31 * result + linearity.ordinal.hashCode()
+        return result
+    }
+
+    fun plus(right: ColorRGBa) = copy(
+        r = r + right.r,
+        g = g + right.g,
+        b = b + right.b,
+        alpha = alpha + right.alpha
+    )
+
+    fun minus(right: ColorRGBa) = copy(
+        r = r - right.r,
+        g = g - right.g,
+        b = b - right.b,
+        alpha = alpha - right.alpha
+    )
+
+    fun times(scale: Double) = copy(r = r * scale, g = g * scale, b = b * scale, alpha = alpha * scale)
+
+    fun mix(other: ColorRGBa, factor: Double): ColorRGBa {
+        return mix(this, other, factor)
+    }
+
+    fun toVector4(): Vector4D = Vector4D(r, g, b, alpha)
+
+    /**
+     * Retrieves the color's RGBA component value based on the specified index:
+     * [index] should be 0 for red, 1 for green, 2 for blue, 3 for alpha.
+     * Other index values throw an [IndexOutOfBoundsException].
+     */
+    operator fun get(index: Int) = when (index) {
+        0 -> r
+        1 -> g
+        2 -> b
+        3 -> alpha
+        else -> throw IllegalArgumentException("unsupported index")
+    }
+}
+
+/**
+ * Weighted mix between two colors in the generic RGB color space.
+ * @param x the weighting of colors, a value 0.0 is equivalent to [left],
+ * 1.0 is equivalent to [right] and at 0.5 both colors contribute to the result equally
+ * @return a mix of [left] and [right] weighted by [x]
+ */
+fun mix(left: ColorRGBa, right: ColorRGBa, x: Double): ColorRGBa {
+    val sx = x.coerceIn(0.0, 1.0)
+
+    if (left.linearity.isEquivalent(right.linearity)) {
+        return ColorRGBa(
+            (1.0 - sx) * left.r + sx * right.r,
+            (1.0 - sx) * left.g + sx * right.g,
+            (1.0 - sx) * left.b + sx * right.b,
+            (1.0 - sx) * left.alpha + sx * right.alpha,
+            linearity = left.linearity.leastCertain(right.linearity)
+        )
+    } else {
+        return when (right.linearity) {
+            Linearity.LINEAR -> {
+                mix(left.toLinear(), right.toLinear(), x)
+            }
+
+            Linearity.SRGB -> {
+                mix(left.toSRGB(), right.toSRGB(), x)
+            }
+        }
+    }
+}
+
+/**
+ * Shorthand for calling [ColorRGBa].
+ * Specify only one value to obtain a shade of gray.
+ * @param r red in `[0,1]`
+ * @param g green in `[0,1]`
+ * @param b blue in `[0,1]`
+ * @param a alpha in `[0,1]`, defaults to `1.0`
+ */
+fun rgb(r: Double, g: Double, b: Double, a: Double = 1.0) = ColorRGBa(r, g, b, a, linearity = Linearity.LINEAR)
+
+/**
+ * Shorthand for calling [ColorRGBa].
+ * @param gray shade of gray in `[0,1]`
+ * @param a alpha in `[0,1]`, defaults to `1.0`
+ */
+fun rgb(gray: Double, a: Double = 1.0) = ColorRGBa(gray, gray, gray, a, linearity = Linearity.LINEAR)
+
+/**
+ * Create a color in RGBa space
+ * This function is a shorthand for using the ColorRGBa constructor
+ * @param r red in `[0,1]`
+ * @param g green in `[0,1]`
+ * @param b blue in `[0,1]`
+ * @param a alpha in `[0,1]`
+ */
+@Deprecated("Use rgb(r, g, b, a)", ReplaceWith("rgb(r, g, b, a)"), DeprecationLevel.WARNING)
+fun rgba(r: Double, g: Double, b: Double, a: Double) = ColorRGBa(r, g, b, a, linearity = Linearity.LINEAR)
+
+/**
+ * Shorthand for calling [ColorRGBa.fromHex].
+ * Creates a [ColorRGBa] with [Linearity.SRGB] from a hex string.
+ * @param hex string encoded hex value, for example `"ffc0cd"`
+ */
+fun rgb(hex: String) = ColorRGBa.fromHex(hex)
+
+/**
+ * Converts RGB integer color values into a ColorRGBa object with sRGB linearity.
+ *
+ * @param red The red component of the color, in the range 0-255.
+ * @param green The green component of the color, in the range 0-255.
+ * @param blue The blue component of the color, in the range 0-255.
+ * @param alpha The alpha (transparency) component of the color, in the range 0-255. Default value is 255 (fully opaque).
+ */
+fun rgb(red: Int, green: Int, blue: Int, alpha: Int = 255) =
+    ColorRGBa(red / 255.0, green / 255.0, blue / 255.0, alpha / 255.0, Linearity.SRGB)
diff --git a/android/src/main/java/com/icegps/orx/colorbrewer2/ColorBrewer2.kt b/android/src/main/java/com/icegps/orx/colorbrewer2/ColorBrewer2.kt
new file mode 100644
index 00000000..72881db9
--- /dev/null
+++ b/android/src/main/java/com/icegps/orx/colorbrewer2/ColorBrewer2.kt
@@ -0,0 +1,2777 @@
+import com.icegps.orx.color.ColorRGBa
+import com.icegps.orx.color.rgb
+
+/**
+ * # ColorBrewer2
+ *
+ * https://colorbrewer2.org/
+ *
+ * Based on the research of Dr. Cynthia Brewer.
+ */
+
+enum class ColorBrewer2Type {
+    Any, Diverging, Qualitative, Sequential
+}
+
+class ColorBrewer2Palette(val colors: List<ColorRGBa>, val type: ColorBrewer2Type)
+
+val colorBrewer2 = listOf(
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9882, 0.5529, 0.3490),
+            rgb(1.0000, 1.0000, 0.7490),
+            rgb(0.6000, 0.8353, 0.5804)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.8431, 0.0980, 0.1098),
+            rgb(0.9922, 0.6824, 0.3804),
+            rgb(0.6706, 0.8667, 0.6431),
+            rgb(0.1686, 0.5137, 0.7294)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.8431, 0.0980, 0.1098),
+            rgb(0.9922, 0.6824, 0.3804),
+            rgb(1.0000, 1.0000, 0.7490),
+            rgb(0.6706, 0.8667, 0.6431),
+            rgb(0.1686, 0.5137, 0.7294)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.8353, 0.2431, 0.3098),
+            rgb(0.9882, 0.5529, 0.3490),
+            rgb(0.9961, 0.8784, 0.5451),
+            rgb(0.9020, 0.9608, 0.5961),
+            rgb(0.6000, 0.8353, 0.5804),
+            rgb(0.1961, 0.5333, 0.7412)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.8353, 0.2431, 0.3098),
+            rgb(0.9882, 0.5529, 0.3490),
+            rgb(0.9961, 0.8784, 0.5451),
+            rgb(1.0000, 1.0000, 0.7490),
+            rgb(0.9020, 0.9608, 0.5961),
+            rgb(0.6000, 0.8353, 0.5804),
+            rgb(0.1961, 0.5333, 0.7412)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.8353, 0.2431, 0.3098),
+            rgb(0.9569, 0.4275, 0.2627),
+            rgb(0.9922, 0.6824, 0.3804),
+            rgb(0.9961, 0.8784, 0.5451),
+            rgb(0.9020, 0.9608, 0.5961),
+            rgb(0.6706, 0.8667, 0.6431),
+            rgb(0.4000, 0.7608, 0.6471),
+            rgb(0.1961, 0.5333, 0.7412)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.8353, 0.2431, 0.3098),
+            rgb(0.9569, 0.4275, 0.2627),
+            rgb(0.9922, 0.6824, 0.3804),
+            rgb(0.9961, 0.8784, 0.5451),
+            rgb(1.0000, 1.0000, 0.7490),
+            rgb(0.9020, 0.9608, 0.5961),
+            rgb(0.6706, 0.8667, 0.6431),
+            rgb(0.4000, 0.7608, 0.6471),
+            rgb(0.1961, 0.5333, 0.7412)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.6196, 0.0039, 0.2588),
+            rgb(0.8353, 0.2431, 0.3098),
+            rgb(0.9569, 0.4275, 0.2627),
+            rgb(0.9922, 0.6824, 0.3804),
+            rgb(0.9961, 0.8784, 0.5451),
+            rgb(0.9020, 0.9608, 0.5961),
+            rgb(0.6706, 0.8667, 0.6431),
+            rgb(0.4000, 0.7608, 0.6471),
+            rgb(0.1961, 0.5333, 0.7412),
+            rgb(0.3686, 0.3098, 0.6353)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.6196, 0.0039, 0.2588),
+            rgb(0.8353, 0.2431, 0.3098),
+            rgb(0.9569, 0.4275, 0.2627),
+            rgb(0.9922, 0.6824, 0.3804),
+            rgb(0.9961, 0.8784, 0.5451),
+            rgb(1.0000, 1.0000, 0.7490),
+            rgb(0.9020, 0.9608, 0.5961),
+            rgb(0.6706, 0.8667, 0.6431),
+            rgb(0.4000, 0.7608, 0.6471),
+            rgb(0.1961, 0.5333, 0.7412),
+            rgb(0.3686, 0.3098, 0.6353)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9882, 0.5529, 0.3490),
+            rgb(1.0000, 1.0000, 0.7490),
+            rgb(0.5686, 0.8118, 0.3765)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.8431, 0.0980, 0.1098),
+            rgb(0.9922, 0.6824, 0.3804),
+            rgb(0.6510, 0.8510, 0.4157),
+            rgb(0.1020, 0.5882, 0.2549)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.8431, 0.0980, 0.1098),
+            rgb(0.9922, 0.6824, 0.3804),
+            rgb(1.0000, 1.0000, 0.7490),
+            rgb(0.6510, 0.8510, 0.4157),
+            rgb(0.1020, 0.5882, 0.2549)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.8431, 0.1882, 0.1529),
+            rgb(0.9882, 0.5529, 0.3490),
+            rgb(0.9961, 0.8784, 0.5451),
+            rgb(0.8510, 0.9373, 0.5451),
+            rgb(0.5686, 0.8118, 0.3765),
+            rgb(0.1020, 0.5961, 0.3137)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.8431, 0.1882, 0.1529),
+            rgb(0.9882, 0.5529, 0.3490),
+            rgb(0.9961, 0.8784, 0.5451),
+            rgb(1.0000, 1.0000, 0.7490),
+            rgb(0.8510, 0.9373, 0.5451),
+            rgb(0.5686, 0.8118, 0.3765),
+            rgb(0.1020, 0.5961, 0.3137)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.8431, 0.1882, 0.1529),
+            rgb(0.9569, 0.4275, 0.2627),
+            rgb(0.9922, 0.6824, 0.3804),
+            rgb(0.9961, 0.8784, 0.5451),
+            rgb(0.8510, 0.9373, 0.5451),
+            rgb(0.6510, 0.8510, 0.4157),
+            rgb(0.4000, 0.7412, 0.3882),
+            rgb(0.1020, 0.5961, 0.3137)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.8431, 0.1882, 0.1529),
+            rgb(0.9569, 0.4275, 0.2627),
+            rgb(0.9922, 0.6824, 0.3804),
+            rgb(0.9961, 0.8784, 0.5451),
+            rgb(1.0000, 1.0000, 0.7490),
+            rgb(0.8510, 0.9373, 0.5451),
+            rgb(0.6510, 0.8510, 0.4157),
+            rgb(0.4000, 0.7412, 0.3882),
+            rgb(0.1020, 0.5961, 0.3137)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.6471, 0.0000, 0.1490),
+            rgb(0.8431, 0.1882, 0.1529),
+            rgb(0.9569, 0.4275, 0.2627),
+            rgb(0.9922, 0.6824, 0.3804),
+            rgb(0.9961, 0.8784, 0.5451),
+            rgb(0.8510, 0.9373, 0.5451),
+            rgb(0.6510, 0.8510, 0.4157),
+            rgb(0.4000, 0.7412, 0.3882),
+            rgb(0.1020, 0.5961, 0.3137),
+            rgb(0.0000, 0.4078, 0.2157)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.6471, 0.0000, 0.1490),
+            rgb(0.8431, 0.1882, 0.1529),
+            rgb(0.9569, 0.4275, 0.2627),
+            rgb(0.9922, 0.6824, 0.3804),
+            rgb(0.9961, 0.8784, 0.5451),
+            rgb(1.0000, 1.0000, 0.7490),
+            rgb(0.8510, 0.9373, 0.5451),
+            rgb(0.6510, 0.8510, 0.4157),
+            rgb(0.4000, 0.7412, 0.3882),
+            rgb(0.1020, 0.5961, 0.3137),
+            rgb(0.0000, 0.4078, 0.2157)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9373, 0.5412, 0.3843),
+            rgb(0.9686, 0.9686, 0.9686),
+            rgb(0.4039, 0.6627, 0.8118)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.7922, 0.0000, 0.1255),
+            rgb(0.9569, 0.6471, 0.5098),
+            rgb(0.5725, 0.7725, 0.8706),
+            rgb(0.0196, 0.4431, 0.6902)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.7922, 0.0000, 0.1255),
+            rgb(0.9569, 0.6471, 0.5098),
+            rgb(0.9686, 0.9686, 0.9686),
+            rgb(0.5725, 0.7725, 0.8706),
+            rgb(0.0196, 0.4431, 0.6902)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.6980, 0.0941, 0.1686),
+            rgb(0.9373, 0.5412, 0.3843),
+            rgb(0.9922, 0.8588, 0.7804),
+            rgb(0.8196, 0.8980, 0.9412),
+            rgb(0.4039, 0.6627, 0.8118),
+            rgb(0.1294, 0.4000, 0.6745)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.6980, 0.0941, 0.1686),
+            rgb(0.9373, 0.5412, 0.3843),
+            rgb(0.9922, 0.8588, 0.7804),
+            rgb(0.9686, 0.9686, 0.9686),
+            rgb(0.8196, 0.8980, 0.9412),
+            rgb(0.4039, 0.6627, 0.8118),
+            rgb(0.1294, 0.4000, 0.6745)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.6980, 0.0941, 0.1686),
+            rgb(0.8392, 0.3765, 0.3020),
+            rgb(0.9569, 0.6471, 0.5098),
+            rgb(0.9922, 0.8588, 0.7804),
+            rgb(0.8196, 0.8980, 0.9412),
+            rgb(0.5725, 0.7725, 0.8706),
+            rgb(0.2627, 0.5765, 0.7647),
+            rgb(0.1294, 0.4000, 0.6745)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.6980, 0.0941, 0.1686),
+            rgb(0.8392, 0.3765, 0.3020),
+            rgb(0.9569, 0.6471, 0.5098),
+            rgb(0.9922, 0.8588, 0.7804),
+            rgb(0.9686, 0.9686, 0.9686),
+            rgb(0.8196, 0.8980, 0.9412),
+            rgb(0.5725, 0.7725, 0.8706),
+            rgb(0.2627, 0.5765, 0.7647),
+            rgb(0.1294, 0.4000, 0.6745)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.4039, 0.0000, 0.1216),
+            rgb(0.6980, 0.0941, 0.1686),
+            rgb(0.8392, 0.3765, 0.3020),
+            rgb(0.9569, 0.6471, 0.5098),
+            rgb(0.9922, 0.8588, 0.7804),
+            rgb(0.8196, 0.8980, 0.9412),
+            rgb(0.5725, 0.7725, 0.8706),
+            rgb(0.2627, 0.5765, 0.7647),
+            rgb(0.1294, 0.4000, 0.6745),
+            rgb(0.0196, 0.1882, 0.3804)
+        ), ColorBrewer2Type.Diverging
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.4039, 0.0000, 0.1216),
+            rgb(0.6980, 0.0941, 0.1686),
+            rgb(0.8392, 0.3765, 0.3020),
+            rgb(0.9569, 0.6471, 0.5098),
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+            rgb(0.7961, 0.7882, 0.8863),
+            rgb(0.6196, 0.6039, 0.7843),
+            rgb(0.4588, 0.4196, 0.6941),
+            rgb(0.3294, 0.1529, 0.5608)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9490, 0.9412, 0.9686),
+            rgb(0.8549, 0.8549, 0.9216),
+            rgb(0.7373, 0.7412, 0.8627),
+            rgb(0.6196, 0.6039, 0.7843),
+            rgb(0.4588, 0.4196, 0.6941),
+            rgb(0.3294, 0.1529, 0.5608)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9490, 0.9412, 0.9686),
+            rgb(0.8549, 0.8549, 0.9216),
+            rgb(0.7373, 0.7412, 0.8627),
+            rgb(0.6196, 0.6039, 0.7843),
+            rgb(0.5020, 0.4902, 0.7294),
+            rgb(0.4157, 0.3176, 0.6392),
+            rgb(0.2902, 0.0784, 0.5255)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9882, 0.9843, 0.9922),
+            rgb(0.9373, 0.9294, 0.9608),
+            rgb(0.8549, 0.8549, 0.9216),
+            rgb(0.7373, 0.7412, 0.8627),
+            rgb(0.6196, 0.6039, 0.7843),
+            rgb(0.5020, 0.4902, 0.7294),
+            rgb(0.4157, 0.3176, 0.6392),
+            rgb(0.2902, 0.0784, 0.5255)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9882, 0.9843, 0.9922),
+            rgb(0.9373, 0.9294, 0.9608),
+            rgb(0.8549, 0.8549, 0.9216),
+            rgb(0.7373, 0.7412, 0.8627),
+            rgb(0.6196, 0.6039, 0.7843),
+            rgb(0.5020, 0.4902, 0.7294),
+            rgb(0.4157, 0.3176, 0.6392),
+            rgb(0.3294, 0.1529, 0.5608),
+            rgb(0.2471, 0.0000, 0.4902)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.8784, 0.9529, 0.8588),
+            rgb(0.6588, 0.8667, 0.7098),
+            rgb(0.2627, 0.6353, 0.7922)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9412, 0.9765, 0.9098),
+            rgb(0.7294, 0.8941, 0.7373),
+            rgb(0.4824, 0.8000, 0.7686),
+            rgb(0.1686, 0.5490, 0.7451)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9412, 0.9765, 0.9098),
+            rgb(0.7294, 0.8941, 0.7373),
+            rgb(0.4824, 0.8000, 0.7686),
+            rgb(0.2627, 0.6353, 0.7922),
+            rgb(0.0314, 0.4078, 0.6745)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9412, 0.9765, 0.9098),
+            rgb(0.8000, 0.9216, 0.7725),
+            rgb(0.6588, 0.8667, 0.7098),
+            rgb(0.4824, 0.8000, 0.7686),
+            rgb(0.2627, 0.6353, 0.7922),
+            rgb(0.0314, 0.4078, 0.6745)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9412, 0.9765, 0.9098),
+            rgb(0.8000, 0.9216, 0.7725),
+            rgb(0.6588, 0.8667, 0.7098),
+            rgb(0.4824, 0.8000, 0.7686),
+            rgb(0.3059, 0.7020, 0.8275),
+            rgb(0.1686, 0.5490, 0.7451),
+            rgb(0.0314, 0.3451, 0.6196)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9686, 0.9882, 0.9412),
+            rgb(0.8784, 0.9529, 0.8588),
+            rgb(0.8000, 0.9216, 0.7725),
+            rgb(0.6588, 0.8667, 0.7098),
+            rgb(0.4824, 0.8000, 0.7686),
+            rgb(0.3059, 0.7020, 0.8275),
+            rgb(0.1686, 0.5490, 0.7451),
+            rgb(0.0314, 0.3451, 0.6196)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9686, 0.9882, 0.9412),
+            rgb(0.8784, 0.9529, 0.8588),
+            rgb(0.8000, 0.9216, 0.7725),
+            rgb(0.6588, 0.8667, 0.7098),
+            rgb(0.4824, 0.8000, 0.7686),
+            rgb(0.3059, 0.7020, 0.8275),
+            rgb(0.1686, 0.5490, 0.7451),
+            rgb(0.0314, 0.4078, 0.6745),
+            rgb(0.0314, 0.2510, 0.5059)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9412, 0.9412, 0.9412),
+            rgb(0.7412, 0.7412, 0.7412),
+            rgb(0.3882, 0.3882, 0.3882)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9686, 0.9686, 0.9686),
+            rgb(0.8000, 0.8000, 0.8000),
+            rgb(0.5882, 0.5882, 0.5882),
+            rgb(0.3216, 0.3216, 0.3216)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9686, 0.9686, 0.9686),
+            rgb(0.8000, 0.8000, 0.8000),
+            rgb(0.5882, 0.5882, 0.5882),
+            rgb(0.3882, 0.3882, 0.3882),
+            rgb(0.1451, 0.1451, 0.1451)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9686, 0.9686, 0.9686),
+            rgb(0.8510, 0.8510, 0.8510),
+            rgb(0.7412, 0.7412, 0.7412),
+            rgb(0.5882, 0.5882, 0.5882),
+            rgb(0.3882, 0.3882, 0.3882),
+            rgb(0.1451, 0.1451, 0.1451)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9686, 0.9686, 0.9686),
+            rgb(0.8510, 0.8510, 0.8510),
+            rgb(0.7412, 0.7412, 0.7412),
+            rgb(0.5882, 0.5882, 0.5882),
+            rgb(0.4510, 0.4510, 0.4510),
+            rgb(0.3216, 0.3216, 0.3216),
+            rgb(0.1451, 0.1451, 0.1451)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(1.0000, 1.0000, 1.0000),
+            rgb(0.9412, 0.9412, 0.9412),
+            rgb(0.8510, 0.8510, 0.8510),
+            rgb(0.7412, 0.7412, 0.7412),
+            rgb(0.5882, 0.5882, 0.5882),
+            rgb(0.4510, 0.4510, 0.4510),
+            rgb(0.3216, 0.3216, 0.3216),
+            rgb(0.1451, 0.1451, 0.1451)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(1.0000, 1.0000, 1.0000),
+            rgb(0.9412, 0.9412, 0.9412),
+            rgb(0.8510, 0.8510, 0.8510),
+            rgb(0.7412, 0.7412, 0.7412),
+            rgb(0.5882, 0.5882, 0.5882),
+            rgb(0.4510, 0.4510, 0.4510),
+            rgb(0.3216, 0.3216, 0.3216),
+            rgb(0.1451, 0.1451, 0.1451),
+            rgb(0.0000, 0.0000, 0.0000)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(1.0000, 0.9294, 0.6275),
+            rgb(0.9961, 0.6980, 0.2980),
+            rgb(0.9412, 0.2314, 0.1255)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(1.0000, 1.0000, 0.6980),
+            rgb(0.9961, 0.8000, 0.3608),
+            rgb(0.9922, 0.5529, 0.2353),
+            rgb(0.8902, 0.1020, 0.1098)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(1.0000, 1.0000, 0.6980),
+            rgb(0.9961, 0.8000, 0.3608),
+            rgb(0.9922, 0.5529, 0.2353),
+            rgb(0.9412, 0.2314, 0.1255),
+            rgb(0.7412, 0.0000, 0.1490)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(1.0000, 1.0000, 0.6980),
+            rgb(0.9961, 0.8510, 0.4627),
+            rgb(0.9961, 0.6980, 0.2980),
+            rgb(0.9922, 0.5529, 0.2353),
+            rgb(0.9412, 0.2314, 0.1255),
+            rgb(0.7412, 0.0000, 0.1490)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(1.0000, 1.0000, 0.6980),
+            rgb(0.9961, 0.8510, 0.4627),
+            rgb(0.9961, 0.6980, 0.2980),
+            rgb(0.9922, 0.5529, 0.2353),
+            rgb(0.9882, 0.3059, 0.1647),
+            rgb(0.8902, 0.1020, 0.1098),
+            rgb(0.6941, 0.0000, 0.1490)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(1.0000, 1.0000, 0.8000),
+            rgb(1.0000, 0.9294, 0.6275),
+            rgb(0.9961, 0.8510, 0.4627),
+            rgb(0.9961, 0.6980, 0.2980),
+            rgb(0.9922, 0.5529, 0.2353),
+            rgb(0.9882, 0.3059, 0.1647),
+            rgb(0.8902, 0.1020, 0.1098),
+            rgb(0.6941, 0.0000, 0.1490)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(1.0000, 1.0000, 0.8000),
+            rgb(1.0000, 0.9294, 0.6275),
+            rgb(0.9961, 0.8510, 0.4627),
+            rgb(0.9961, 0.6980, 0.2980),
+            rgb(0.9922, 0.5529, 0.2353),
+            rgb(0.9882, 0.3059, 0.1647),
+            rgb(0.8902, 0.1020, 0.1098),
+            rgb(0.7412, 0.0000, 0.1490),
+            rgb(0.5020, 0.0000, 0.1490)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9059, 0.8824, 0.9373),
+            rgb(0.7882, 0.5804, 0.7804),
+            rgb(0.8667, 0.1098, 0.4667)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9451, 0.9333, 0.9647),
+            rgb(0.8431, 0.7098, 0.8471),
+            rgb(0.8745, 0.3961, 0.6902),
+            rgb(0.8078, 0.0706, 0.3373)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9451, 0.9333, 0.9647),
+            rgb(0.8431, 0.7098, 0.8471),
+            rgb(0.8745, 0.3961, 0.6902),
+            rgb(0.8667, 0.1098, 0.4667),
+            rgb(0.5961, 0.0000, 0.2627)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9451, 0.9333, 0.9647),
+            rgb(0.8314, 0.7255, 0.8549),
+            rgb(0.7882, 0.5804, 0.7804),
+            rgb(0.8745, 0.3961, 0.6902),
+            rgb(0.8667, 0.1098, 0.4667),
+            rgb(0.5961, 0.0000, 0.2627)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9451, 0.9333, 0.9647),
+            rgb(0.8314, 0.7255, 0.8549),
+            rgb(0.7882, 0.5804, 0.7804),
+            rgb(0.8745, 0.3961, 0.6902),
+            rgb(0.9059, 0.1608, 0.5412),
+            rgb(0.8078, 0.0706, 0.3373),
+            rgb(0.5686, 0.0000, 0.2471)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9686, 0.9569, 0.9765),
+            rgb(0.9059, 0.8824, 0.9373),
+            rgb(0.8314, 0.7255, 0.8549),
+            rgb(0.7882, 0.5804, 0.7804),
+            rgb(0.8745, 0.3961, 0.6902),
+            rgb(0.9059, 0.1608, 0.5412),
+            rgb(0.8078, 0.0706, 0.3373),
+            rgb(0.5686, 0.0000, 0.2471)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9686, 0.9569, 0.9765),
+            rgb(0.9059, 0.8824, 0.9373),
+            rgb(0.8314, 0.7255, 0.8549),
+            rgb(0.7882, 0.5804, 0.7804),
+            rgb(0.8745, 0.3961, 0.6902),
+            rgb(0.9059, 0.1608, 0.5412),
+            rgb(0.8078, 0.0706, 0.3373),
+            rgb(0.5961, 0.0000, 0.2627),
+            rgb(0.4039, 0.0000, 0.1216)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.8706, 0.9216, 0.9686),
+            rgb(0.6196, 0.7922, 0.8824),
+            rgb(0.1922, 0.5098, 0.7412)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9373, 0.9529, 1.0000),
+            rgb(0.7412, 0.8431, 0.9059),
+            rgb(0.4196, 0.6824, 0.8392),
+            rgb(0.1294, 0.4431, 0.7098)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9373, 0.9529, 1.0000),
+            rgb(0.7412, 0.8431, 0.9059),
+            rgb(0.4196, 0.6824, 0.8392),
+            rgb(0.1922, 0.5098, 0.7412),
+            rgb(0.0314, 0.3176, 0.6118)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9373, 0.9529, 1.0000),
+            rgb(0.7765, 0.8588, 0.9373),
+            rgb(0.6196, 0.7922, 0.8824),
+            rgb(0.4196, 0.6824, 0.8392),
+            rgb(0.1922, 0.5098, 0.7412),
+            rgb(0.0314, 0.3176, 0.6118)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9373, 0.9529, 1.0000),
+            rgb(0.7765, 0.8588, 0.9373),
+            rgb(0.6196, 0.7922, 0.8824),
+            rgb(0.4196, 0.6824, 0.8392),
+            rgb(0.2588, 0.5725, 0.7765),
+            rgb(0.1294, 0.4431, 0.7098),
+            rgb(0.0314, 0.2706, 0.5804)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9686, 0.9843, 1.0000),
+            rgb(0.8706, 0.9216, 0.9686),
+            rgb(0.7765, 0.8588, 0.9373),
+            rgb(0.6196, 0.7922, 0.8824),
+            rgb(0.4196, 0.6824, 0.8392),
+            rgb(0.2588, 0.5725, 0.7765),
+            rgb(0.1294, 0.4431, 0.7098),
+            rgb(0.0314, 0.2706, 0.5804)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9686, 0.9843, 1.0000),
+            rgb(0.8706, 0.9216, 0.9686),
+            rgb(0.7765, 0.8588, 0.9373),
+            rgb(0.6196, 0.7922, 0.8824),
+            rgb(0.4196, 0.6824, 0.8392),
+            rgb(0.2588, 0.5725, 0.7765),
+            rgb(0.1294, 0.4431, 0.7098),
+            rgb(0.0314, 0.3176, 0.6118),
+            rgb(0.0314, 0.1882, 0.4196)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9255, 0.8863, 0.9412),
+            rgb(0.6510, 0.7412, 0.8588),
+            rgb(0.1098, 0.5647, 0.6000)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9647, 0.9373, 0.9686),
+            rgb(0.7412, 0.7882, 0.8824),
+            rgb(0.4039, 0.6627, 0.8118),
+            rgb(0.0078, 0.5059, 0.5412)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9647, 0.9373, 0.9686),
+            rgb(0.7412, 0.7882, 0.8824),
+            rgb(0.4039, 0.6627, 0.8118),
+            rgb(0.1098, 0.5647, 0.6000),
+            rgb(0.0039, 0.4235, 0.3490)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9647, 0.9373, 0.9686),
+            rgb(0.8157, 0.8196, 0.9020),
+            rgb(0.6510, 0.7412, 0.8588),
+            rgb(0.4039, 0.6627, 0.8118),
+            rgb(0.1098, 0.5647, 0.6000),
+            rgb(0.0039, 0.4235, 0.3490)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(0.9647, 0.9373, 0.9686),
+            rgb(0.8157, 0.8196, 0.9020),
+            rgb(0.6510, 0.7412, 0.8588),
+            rgb(0.4039, 0.6627, 0.8118),
+            rgb(0.2118, 0.5647, 0.7529),
+            rgb(0.0078, 0.5059, 0.5412),
+            rgb(0.0039, 0.3922, 0.3137)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(1.0000, 0.9686, 0.9843),
+            rgb(0.9255, 0.8863, 0.9412),
+            rgb(0.8157, 0.8196, 0.9020),
+            rgb(0.6510, 0.7412, 0.8588),
+            rgb(0.4039, 0.6627, 0.8118),
+            rgb(0.2118, 0.5647, 0.7529),
+            rgb(0.0078, 0.5059, 0.5412),
+            rgb(0.0039, 0.3922, 0.3137)
+        ), ColorBrewer2Type.Sequential
+    ),
+    ColorBrewer2Palette(
+        listOf(
+            rgb(1.0000, 0.9686, 0.9843),
+            rgb(0.9255, 0.8863, 0.9412),
+            rgb(0.8157, 0.8196, 0.9020),
+            rgb(0.6510, 0.7412, 0.8588),
+            rgb(0.4039, 0.6627, 0.8118),
+            rgb(0.2118, 0.5647, 0.7529),
+            rgb(0.0078, 0.5059, 0.5412),
+            rgb(0.0039, 0.4235, 0.3490),
+            rgb(0.0039, 0.2745, 0.2118)
+        ), ColorBrewer2Type.Sequential
+    )
+)
+
+fun colorBrewer2Palettes(
+    numberOfColors: Int? = null,
+    paletteType: ColorBrewer2Type = ColorBrewer2Type.Any
+) = when {
+    numberOfColors == null && paletteType == ColorBrewer2Type.Any -> colorBrewer2
+    paletteType == ColorBrewer2Type.Any -> colorBrewer2.filter { it.colors.size == numberOfColors }
+    else -> colorBrewer2.filter { it.type == paletteType }
+}
diff --git a/android/src/main/java/com/icegps/orx/ktx/ColorRGBa.kt b/android/src/main/java/com/icegps/orx/ktx/ColorRGBa.kt
index 098e04a3..05f8c638 100644
--- a/android/src/main/java/com/icegps/orx/ktx/ColorRGBa.kt
+++ b/android/src/main/java/com/icegps/orx/ktx/ColorRGBa.kt
@@ -1,6 +1,6 @@
 package com.icegps.orx.ktx
 
-import org.openrndr.color.ColorRGBa
+import com.icegps.orx.color.ColorRGBa
 
 /**
  * @author tabidachinokaze
diff --git a/android/src/main/java/com/icegps/orx/ktx/Vector2.kt b/android/src/main/java/com/icegps/orx/ktx/Vector2.kt
deleted file mode 100644
index bc87dc4b..00000000
--- a/android/src/main/java/com/icegps/orx/ktx/Vector2.kt
+++ /dev/null
@@ -1,22 +0,0 @@
-package com.icegps.orx.ktx
-
-import com.icegps.common.helper.GeoHelper
-import com.mapbox.geojson.Point
-import org.openrndr.math.Vector2
-
-fun Vector2.niceStr(): String {
-    return "[$x, $y, 0.0]".format(this)
-}
-
-fun List<Vector2>.niceStr(): String {
-    return joinToString(", ", "[", "]") {
-        it.niceStr()
-    }
-}
-
-fun Vector2.toMapboxPoint(): Point {
-    val geoHelper = GeoHelper.getSharedInstance()
-    return geoHelper.enuToWGS84Object(GeoHelper.ENU(x, y)).run {
-        Point.fromLngLat(lon, lat, hgt)
-    }
-}
\ No newline at end of file
diff --git a/android/src/main/java/com/icegps/orx/ktx/Vector2D.kt b/android/src/main/java/com/icegps/orx/ktx/Vector2D.kt
index 7761afe7..327f98e4 100644
--- a/android/src/main/java/com/icegps/orx/ktx/Vector2D.kt
+++ b/android/src/main/java/com/icegps/orx/ktx/Vector2D.kt
@@ -12,4 +12,13 @@ fun Vector2D.toMapboxPoint(): Point {
     val geoHelper = GeoHelper.getSharedInstance()
     val wgs84 = geoHelper.enuToWGS84Object(GeoHelper.ENU(x = x, y = y))
     return Point.fromLngLat(wgs84.lon, wgs84.lat)
-}
\ No newline at end of file
+}
+
+/**
+ * Interpolates between the current vector and the given vector `o` by the specified mixing factor.
+ *
+ * @param o The target vector to interpolate towards.
+ * @param mix A mixing factor between 0 and 1 where `0` results in the current vector and `1` results in the vector `o`.
+ * @return A new vector that is the result of the interpolation.
+ */
+fun Vector2D.mix(o: Vector2D, mix: Double): Vector2D = this * (1 - mix) + o * mix
diff --git a/android/src/main/java/com/icegps/orx/ktx/Vector3.kt b/android/src/main/java/com/icegps/orx/ktx/Vector3.kt
deleted file mode 100644
index 79263ffd..00000000
--- a/android/src/main/java/com/icegps/orx/ktx/Vector3.kt
+++ /dev/null
@@ -1,22 +0,0 @@
-package com.icegps.orx.ktx
-
-import org.openrndr.math.Vector3
-
-fun Vector3.niceStr(): String {
-    return "[$x, $y, $z]".format(this)
-}
-
-fun List<Vector3>.niceStr(): String {
-    return joinToString(", ", "[", "]") {
-        it.niceStr()
-    }
-}
-
-val List<Vector3>.area: org.openrndr.shape.Rectangle
-    get() {
-        val minX = minOf { it.x }
-        val maxX = maxOf { it.x }
-        val minY = minOf { it.y }
-        val maxY = maxOf { it.y }
-        return org.openrndr.shape.Rectangle(x = minX, y = minY, width = maxX - minX, height = maxY - minY)
-    }
diff --git a/android/src/main/java/com/icegps/orx/marchingsquares/MarchingSquares.kt b/android/src/main/java/com/icegps/orx/marchingsquares/MarchingSquares.kt
new file mode 100644
index 00000000..ea1e79e3
--- /dev/null
+++ b/android/src/main/java/com/icegps/orx/marchingsquares/MarchingSquares.kt
@@ -0,0 +1,219 @@
+package com.icegps.orx.marchingsquares
+
+import com.icegps.math.geometry.Rectangle
+import com.icegps.math.geometry.Vector2D
+import com.icegps.math.geometry.Vector2I
+import com.icegps.orx.ktx.mix
+import kotlin.math.max
+import kotlin.math.min
+
+private const val closeEpsilon = 1E-6
+
+data class Segment2D(
+    val start: Vector2D,
+    val control: List<Vector2D>,
+    val end: Vector2D,
+    val corner: Boolean = false
+)
+
+fun Segment2D(start: Vector2D, end: Vector2D, corner: Boolean = true) =
+    Segment2D(start, emptyList(), end, corner)
+
+fun Segment2D(start: Vector2D, c0: Vector2D, c1: Vector2D, end: Vector2D, corner: Boolean = true) =
+    Segment2D(start, listOf(c0, c1), end, corner)
+
+data class ShapeContour(
+    val segments: List<Segment2D>,
+    val closed: Boolean,
+) {
+    companion object {
+        val EMPTY = ShapeContour(
+            segments = emptyList(),
+            closed = false,
+        )
+
+        /**
+         * Creates a ShapeContour from a list of points, specifying whether the contour is closed and its y-axis polarity.
+         *
+         * @param points A list of points (Vector2) defining the vertices of the contour.
+         * @param closed Boolean indicating whether the contour should be closed (forms a loop).
+         * @return A ShapeContour object representing the resulting contour.
+         */
+        fun fromPoints(
+            points: List<Vector2D>,
+            closed: Boolean,
+        ): ShapeContour = if (points.isEmpty()) {
+            EMPTY
+        } else {
+            if (!closed) {
+                ShapeContour((0 until points.size - 1).map {
+                    Segment2D(
+                        points[it],
+                        points[it + 1]
+                    )
+                }, false)
+            } else {
+                val d = (points.last() - points.first()).lengthSquared
+                val usePoints = if (d > closeEpsilon) points else points.dropLast(1)
+                ShapeContour((usePoints.indices).map {
+                    Segment2D(
+                        usePoints[it],
+                        usePoints[(it + 1) % usePoints.size]
+                    )
+                }, true)
+            }
+        }
+    }
+}
+
+data class LineSegment(val start: Vector2D, val end: Vector2D)
+
+/**
+ * Find contours for a function [f] using the marching squares algorithm. A contour is found when f(x) crosses zero.
+ * @param f the function
+ * @param area a rectangular area in which the function should be evaluated
+ * @param cellSize the size of the cells, smaller size gives higher resolution
+ * @param useInterpolation intersection points will be interpolated if true, default true
+ * @return a list of [ShapeContour] instances
+ */
+fun findContours(
+    f: (Vector2D) -> Double,
+    area: Rectangle,
+    cellSize: Double,
+    useInterpolation: Boolean = true
+): List<ShapeContour> {
+    val segments = mutableListOf<LineSegment>()
+    val values = mutableMapOf<Vector2I, Double>()
+    val segmentsMap = mutableMapOf<Vector2D, MutableList<LineSegment>>()
+
+    for (y in 0 until (area.height / cellSize).toInt()) {
+        for (x in 0 until (area.width / cellSize).toInt()) {
+            values[Vector2I(x, y)] = f(Vector2D(x * cellSize + area.x, y * cellSize + area.y))
+        }
+    }
+
+    val zero = 0.0
+    for (y in 0 until (area.height / cellSize).toInt()) {
+        for (x in 0 until (area.width / cellSize).toInt()) {
+
+            // Here we check if we are at a right or top border. This is to ensure we create closed contours
+            // later on in the process.
+            val v00 = if (x == 0 || y == 0) zero else (values[Vector2I(x, y)] ?: zero)
+            val v10 = if (y == 0) zero else (values[Vector2I(x + 1, y)] ?: zero)
+            val v01 = if (x == 0) zero else (values[Vector2I(x, y + 1)] ?: zero)
+            val v11 = (values[Vector2I(x + 1, y + 1)] ?: zero)
+
+            val p00 = Vector2D(x.toDouble(), y.toDouble()) * cellSize + area.topLeft
+            val p10 = Vector2D((x + 1).toDouble(), y.toDouble()) * cellSize + area.topLeft
+            val p01 = Vector2D(x.toDouble(), (y + 1).toDouble()) * cellSize + area.topLeft
+            val p11 = Vector2D((x + 1).toDouble(), (y + 1).toDouble()) * cellSize + area.topLeft
+
+            val index = (if (v00 >= 0.0) 1 else 0) +
+                    (if (v10 >= 0.0) 2 else 0) +
+                    (if (v01 >= 0.0) 4 else 0) +
+                    (if (v11 >= 0.0) 8 else 0)
+
+            fun blend(v1: Double, v2: Double): Double {
+                if (useInterpolation) {
+                    require(!v1.isNaN() && !v2.isNaN()) {
+                        "Input values v1=$v1 or v2=$v2 are NaN, which is not allowed."
+                    }
+                    val f1 = min(v1, v2)
+                    val f2 = max(v1, v2)
+                    val v = (-f1) / (f2 - f1)
+
+                    require(v == v && v in 0.0..1.0) {
+                        "Invalid value calculated during interpolation: v=$v"
+                    }
+
+                    return if (f1 == v1) {
+                        v
+                    } else {
+                        1.0 - v
+                    }
+                } else {
+                    return 0.5
+                }
+            }
+
+            fun emitLine(
+                p00: Vector2D, p01: Vector2D, v00: Double, v01: Double,
+                p10: Vector2D, p11: Vector2D, v10: Double, v11: Double
+            ) {
+                val r0 = blend(v00, v01)
+                val r1 = blend(v10, v11)
+
+                val v0 = p00.mix(p01, r0)
+                val v1 = p10.mix(p11, r1)
+                val l0 = LineSegment(v0, v1)
+                segmentsMap.getOrPut(v1) { mutableListOf() }.add(l0)
+                segmentsMap.getOrPut(v0) { mutableListOf() }.add(l0)
+                segments.add(l0)
+            }
+
+            when (index) {
+                0, 15 -> {}
+                1, 15 xor 1 -> {
+                    emitLine(p00, p01, v00, v01, p00, p10, v00, v10)
+                }
+
+                2, 15 xor 2 -> {
+                    emitLine(p00, p10, v00, v10, p10, p11, v10, v11)
+                }
+
+                3, 15 xor 3 -> {
+                    emitLine(p00, p01, v00, v01, p10, p11, v10, v11)
+                }
+
+                4, 15 xor 4 -> {
+                    emitLine(p00, p01, v00, v01, p01, p11, v01, v11)
+                }
+
+                5, 15 xor 5 -> {
+                    emitLine(p00, p10, v00, v10, p01, p11, v01, v11)
+                }
+
+                6, 15 xor 6 -> {
+                    emitLine(p00, p01, v00, v01, p00, p10, v00, v10)
+                    emitLine(p01, p11, v01, v11, p10, p11, v10, v11)
+                }
+
+                7, 15 xor 7 -> {
+                    emitLine(p01, p11, v01, v11, p10, p11, v10, v11)
+                }
+            }
+        }
+    }
+
+    val processedSegments = mutableSetOf<LineSegment>()
+    val contours = mutableListOf<ShapeContour>()
+    for (segment in segments) {
+        if (segment in processedSegments) {
+            continue
+        } else {
+            val collected = mutableListOf<Vector2D>()
+            var current: LineSegment? = segment
+            var closed = true
+            var lastVertex = Vector2D.INFINITY
+            do {
+                current!!
+                if (lastVertex.squaredDistanceTo(current.start) > 1E-5) {
+                    collected.add(current.start)
+                }
+                lastVertex = current.start
+                processedSegments.add(current)
+                if (segmentsMap[current.start]!!.size < 2) {
+                    closed = false
+                }
+                val hold = current
+                current = segmentsMap[current.start]?.firstOrNull { it !in processedSegments }
+                if (current == null) {
+                    current = segmentsMap[hold.end]?.firstOrNull { it !in processedSegments }
+                }
+            } while (current != segment && current != null)
+
+            contours.add(ShapeContour.fromPoints(collected, closed = closed))
+        }
+    }
+    return contours
+}
\ No newline at end of file
diff --git a/android/src/main/java/com/icegps/orx/triangulation/DelaunayTriangulation3D.kt b/android/src/main/java/com/icegps/orx/triangulation/DelaunayTriangulation3D.kt
deleted file mode 100644
index 02cd6b68..00000000
--- a/android/src/main/java/com/icegps/orx/triangulation/DelaunayTriangulation3D.kt
+++ /dev/null
@@ -1,91 +0,0 @@
-package com.icegps.orx.triangulation
-
-import org.openrndr.extra.triangulation.Delaunay
-import org.openrndr.math.Vector3
-import org.openrndr.shape.path3D
-
-/**
- * Kotlin/OPENRNDR idiomatic interface to `Delaunay`
- */
-class DelaunayTriangulation3D(val points: List<Vector3>) {
-    val delaunay: Delaunay = Delaunay.from(points.map { it.xy })
-
-    fun neighbors(pointIndex: Int): Sequence<Int> {
-        return delaunay.neighbors(pointIndex)
-    }
-
-    fun neighborPoints(pointIndex: Int): List<Vector3> {
-        return neighbors(pointIndex).map { points[it] }.toList()
-    }
-
-    fun triangleIndices(): List<IntArray> {
-        val list = mutableListOf<IntArray>()
-        for (i in delaunay.triangles.indices step 3) {
-            list.add(
-                intArrayOf(
-                    delaunay.triangles[i],
-                    delaunay.triangles[i + 1],
-                    delaunay.triangles[i + 2]
-                )
-            )
-        }
-        return list
-    }
-
-    fun triangles(filterPredicate: (Int, Int, Int) -> Boolean = { _, _, _ -> true }): MutableList<Triangle3D> {
-        val list = mutableListOf<Triangle3D>()
-
-        for (i in delaunay.triangles.indices step 3) {
-            val t0 = delaunay.triangles[i]
-            val t1 = delaunay.triangles[i + 1]
-            val t2 = delaunay.triangles[i + 2]
-
-            // originally they are defined *counterclockwise*
-            if (filterPredicate(t2, t1, t0)) {
-                val p1 = points[t0]
-                val p2 = points[t1]
-                val p3 = points[t2]
-                list.add(Triangle3D(p1, p2, p3))
-            }
-        }
-        return list
-    }
-
-    // Inner edges of the delaunay triangulation (without hull)
-    fun halfedges() = path3D {
-        for (i in delaunay.halfedges.indices) {
-            val j = delaunay.halfedges[i]
-
-            if (j < i) continue
-            val ti = delaunay.triangles[i]
-            val tj = delaunay.triangles[j]
-
-            moveTo(points[ti])
-            lineTo(points[tj])
-        }
-    }
-
-    fun hull() = path3D {
-        for (h in delaunay.hull) {
-            moveOrLineTo(points[h])
-        }
-        close()
-    }
-
-    fun nearest(query: Vector3): Int = delaunay.find(query.x, query.y)
-
-    fun nearestPoint(query: Vector3): Vector3 = points[nearest(query)]
-}
-
-/**
- * Computes the Delaunay triangulation for the list of 2D points.
- *
- * The Delaunay triangulation is a triangulation of a set of points such that
- * no point is inside the circumcircle of any triangle. It maximizes the minimum
- * angle of all the angles in the triangles, avoiding skinny triangles.
- *
- * @return A DelaunayTriangulation object representing the triangulation of the given points.
- */
-fun List<Vector3>.delaunayTriangulation(): DelaunayTriangulation3D {
-    return DelaunayTriangulation3D(this)
-}
diff --git a/android/src/main/java/com/icegps/orx/triangulation/Triangle3D.kt b/android/src/main/java/com/icegps/orx/triangulation/Triangle3D.kt
deleted file mode 100644
index 0b840eea..00000000
--- a/android/src/main/java/com/icegps/orx/triangulation/Triangle3D.kt
+++ /dev/null
@@ -1,24 +0,0 @@
-package com.icegps.orx.triangulation
-
-import org.openrndr.math.Vector3
-import org.openrndr.shape.BezierSegment
-import org.openrndr.shape.Path
-import org.openrndr.shape.Path3D
-
-/**
- * @author tabidachinokaze
- * @date 2025/11/24
- */
-data class Triangle3D(
-    val x1: Vector3,
-    val x2: Vector3,
-    val x3: Vector3,
-) : Path<Vector3> {
-    val path = Path3D.fromPoints(points = listOf(x1, x2, x3), closed = true)
-    override fun sub(t0: Double, t1: Double): Path<Vector3> = path.sub(t0, t1)
-
-    override val closed: Boolean get() = path.closed
-    override val empty: Boolean get() = path.empty
-    override val infinity: Vector3 get() = path.infinity
-    override val segments: List<BezierSegment<Vector3>> get() = path.segments
-}
\ No newline at end of file
diff --git a/icegps-triangulation/build.gradle.kts b/icegps-triangulation/build.gradle.kts
index a95692d3..f4d76e90 100644
--- a/icegps-triangulation/build.gradle.kts
+++ b/icegps-triangulation/build.gradle.kts
@@ -3,11 +3,14 @@ plugins {
     alias(libs.plugins.kotlin.jvm)
 }
 java {
-    sourceCompatibility = JavaVersion.VERSION_11
-    targetCompatibility = JavaVersion.VERSION_11
+    sourceCompatibility = JavaVersion.VERSION_17
+    targetCompatibility = JavaVersion.VERSION_17
 }
 kotlin {
     compilerOptions {
-        jvmTarget = org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_11
+        jvmTarget = org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_17
     }
 }
+dependencies {
+    implementation(project(":math"))
+}
\ No newline at end of file
diff --git a/icegps-triangulation/src/main/java/com/icegps/triangulation/Delaunator.kt b/icegps-triangulation/src/main/java/com/icegps/triangulation/Delaunator.kt
index 0958d1cc..c33ca417 100644
--- a/icegps-triangulation/src/main/java/com/icegps/triangulation/Delaunator.kt
+++ b/icegps-triangulation/src/main/java/com/icegps/triangulation/Delaunator.kt
@@ -1,4 +1,4 @@
-package org.openrndr.extra.triangulation
+package com.icegps.triangulation
 
 import kotlin.math.*
 
diff --git a/icegps-triangulation/src/main/java/com/icegps/triangulation/Delaunay.kt b/icegps-triangulation/src/main/java/com/icegps/triangulation/Delaunay.kt
index 36f8ddcd..22e0a2e2 100644
--- a/icegps-triangulation/src/main/java/com/icegps/triangulation/Delaunay.kt
+++ b/icegps-triangulation/src/main/java/com/icegps/triangulation/Delaunay.kt
@@ -1,8 +1,7 @@
-package org.openrndr.extra.triangulation
+package com.icegps.triangulation
 
-import org.openrndr.extra.triangulation.Delaunay.Companion.from
-import org.openrndr.math.Vector2
-import org.openrndr.shape.Rectangle
+import com.icegps.math.geometry.Vector2D
+import com.icegps.triangulation.Delaunay.Companion.from
 import kotlin.math.cos
 import kotlin.math.pow
 import kotlin.math.sin
@@ -42,7 +41,7 @@ class Delaunay(val points: DoubleArray) {
          *
          * @property points a list of 2D points
          */
-        fun from(points: List<Vector2>): Delaunay {
+        fun from(points: List<Vector2D>): Delaunay {
             val n = points.size
             val coords = DoubleArray(n * 2)
 
@@ -74,13 +73,13 @@ class Delaunay(val points: DoubleArray) {
         init()
     }
 
-    fun neighbors(i:Int) = sequence<Int> {
+    fun neighbors(i: Int) = sequence<Int> {
         val e0 = inedges[i]
         if (e0 != -1) {
             var e = e0
             var p0 = -1
 
-            loop@do {
+            loop@ do {
                 p0 = triangles[e]
                 yield(p0)
                 e = if (e % 3 == 2) e - 2 else e + 1
@@ -109,26 +108,28 @@ class Delaunay(val points: DoubleArray) {
         for (i in 0 until triangles.size step 3) {
             val a = 2 * triangles[i]
             val b = 2 * triangles[i + 1]
-            val c =  2 * triangles[i + 2]
+            val c = 2 * triangles[i + 2]
             val coords = points
             val cross = (coords[c] - coords[a]) * (coords[b + 1] - coords[a + 1])
-            - (coords[b] - coords[a]) * (coords[c + 1] - coords[a + 1])
+            -(coords[b] - coords[a]) * (coords[c + 1] - coords[a + 1])
             if (cross > 1e-10) return false;
         }
         return true
     }
-    private fun jitter(x:Double, y:Double, r:Double): DoubleArray {
-        return doubleArrayOf(x + sin(x+y) * r, y + cos(x-y)*r)
+
+    private fun jitter(x: Double, y: Double, r: Double): DoubleArray {
+        return doubleArrayOf(x + sin(x + y) * r, y + cos(x - y) * r)
     }
+
     fun init() {
 
         if (hull.size > 2 && collinear()) {
             println("warning: triangulation is collinear")
             val r = 1E-8
             for (i in 0 until points.size step 2) {
-                val p = jitter(points[i], points[i+1], r)
+                val p = jitter(points[i], points[i + 1], r)
                 points[i] = p[0]
-                points[i+1] = p[1]
+                points[i + 1] = p[1]
             }
 
             delaunator = Delaunator(points)
@@ -221,12 +222,4 @@ class Delaunay(val points: DoubleArray) {
 
         return c
     }
-
-    /**
-     * Generates a Voronoi diagram based on the current Delaunay triangulation and the provided bounds.
-     *
-     * @param bounds A rectangle defining the boundaries within which the Voronoi diagram will be generated.
-     * @return A Voronoi instance representing the resulting Voronoi diagram.
-     */
-    fun voronoi(bounds: Rectangle): Voronoi = Voronoi(this, bounds)
 }
diff --git a/icegps-triangulation/src/main/java/com/icegps/triangulation/DelaunayTriangulation.kt b/icegps-triangulation/src/main/java/com/icegps/triangulation/DelaunayTriangulation.kt
index 4f57c9eb..84171771 100644
--- a/icegps-triangulation/src/main/java/com/icegps/triangulation/DelaunayTriangulation.kt
+++ b/icegps-triangulation/src/main/java/com/icegps/triangulation/DelaunayTriangulation.kt
@@ -1,24 +1,19 @@
-package org.openrndr.extra.triangulation
+package com.icegps.triangulation
 
-import org.openrndr.math.Vector2
-import org.openrndr.shape.Rectangle
-import org.openrndr.shape.Triangle
-import org.openrndr.shape.contour
-import org.openrndr.shape.contours
+import com.icegps.math.geometry.Vector3D
+import com.icegps.math.geometry.toVector2D
 
 /**
  * Kotlin/OPENRNDR idiomatic interface to `Delaunay`
  */
-class DelaunayTriangulation(val points: List<Vector2>) {
-    val delaunay: Delaunay = Delaunay.from(points)
-
-    fun voronoiDiagram(bounds: Rectangle) = VoronoiDiagram(this, bounds)
+class DelaunayTriangulation(val points: List<Vector3D>) {
+    val delaunay: Delaunay = Delaunay.from(points.map { it.toVector2D() })
 
     fun neighbors(pointIndex: Int): Sequence<Int> {
         return delaunay.neighbors(pointIndex)
     }
 
-    fun neighborPoints(pointIndex: Int): List<Vector2> {
+    fun neighborPoints(pointIndex: Int): List<Vector3D> {
         return neighbors(pointIndex).map { points[it] }.toList()
     }
 
@@ -55,30 +50,9 @@ class DelaunayTriangulation(val points: List<Vector2>) {
         return list
     }
 
-    // Inner edges of the delaunay triangulation (without hull)
-    fun halfedges() = contours {
-        for (i in delaunay.halfedges.indices) {
-            val j = delaunay.halfedges[i]
+    fun nearest(query: Vector3D): Int = delaunay.find(query.x, query.y)
 
-            if (j < i) continue
-            val ti = delaunay.triangles[i]
-            val tj = delaunay.triangles[j]
-
-            moveTo(points[ti])
-            lineTo(points[tj])
-        }
-    }
-
-    fun hull() = contour {
-        for (h in delaunay.hull) {
-            moveOrLineTo(points[h])
-        }
-        close()
-    }
-
-    fun nearest(query: Vector2): Int = delaunay.find(query.x, query.y)
-
-    fun nearestPoint(query: Vector2): Vector2 = points[nearest(query)]
+    fun nearestPoint(query: Vector3D): Vector3D = points[nearest(query)]
 }
 
 /**
@@ -90,6 +64,6 @@ class DelaunayTriangulation(val points: List<Vector2>) {
  *
  * @return A DelaunayTriangulation object representing the triangulation of the given points.
  */
-fun List<Vector2>.delaunayTriangulation(): DelaunayTriangulation {
+fun List<Vector3D>.delaunayTriangulation(): DelaunayTriangulation {
     return DelaunayTriangulation(this)
 }
diff --git a/icegps-triangulation/src/main/java/com/icegps/triangulation/DoubleDouble.kt b/icegps-triangulation/src/main/java/com/icegps/triangulation/DoubleDouble.kt
index 477adf04..b668907b 100644
--- a/icegps-triangulation/src/main/java/com/icegps/triangulation/DoubleDouble.kt
+++ b/icegps-triangulation/src/main/java/com/icegps/triangulation/DoubleDouble.kt
@@ -1,4 +1,4 @@
-package org.openrndr.extra.triangulation
+package com.icegps.triangulation
 
 import kotlin.math.pow
 
diff --git a/icegps-triangulation/src/main/java/com/icegps/triangulation/Predicates.kt b/icegps-triangulation/src/main/java/com/icegps/triangulation/Predicates.kt
index 7b5e129d..ee833cae 100644
--- a/icegps-triangulation/src/main/java/com/icegps/triangulation/Predicates.kt
+++ b/icegps-triangulation/src/main/java/com/icegps/triangulation/Predicates.kt
@@ -1,4 +1,4 @@
-package org.openrndr.extra.triangulation
+package com.icegps.triangulation
 
 fun orient2d(bx: Double, by: Double, ax: Double, ay: Double, cx: Double, cy: Double): Double {
     // (ax,ay) (bx,by) are swapped such that the sign of the determinant is flipped. which is what Delaunator.kt expects.
diff --git a/icegps-triangulation/src/main/java/com/icegps/triangulation/Triangle.kt b/icegps-triangulation/src/main/java/com/icegps/triangulation/Triangle.kt
new file mode 100644
index 00000000..440593a3
--- /dev/null
+++ b/icegps-triangulation/src/main/java/com/icegps/triangulation/Triangle.kt
@@ -0,0 +1,13 @@
+package com.icegps.triangulation
+
+import com.icegps.math.geometry.Vector3D
+
+/**
+ * @author tabidachinokaze
+ * @date 2025/11/26
+ */
+data class Triangle(
+    val x1: Vector3D,
+    val x2: Vector3D,
+    val x3: Vector3D,
+)
diff --git a/icegps-triangulation/src/main/java/com/icegps/triangulation/Voronoi.kt b/icegps-triangulation/src/main/java/com/icegps/triangulation/Voronoi.kt
deleted file mode 100644
index bbcc0e7c..00000000
--- a/icegps-triangulation/src/main/java/com/icegps/triangulation/Voronoi.kt
+++ /dev/null
@@ -1,622 +0,0 @@
-package org.openrndr.extra.triangulation
-
-import org.openrndr.math.Vector2
-import org.openrndr.shape.Rectangle
-import kotlin.math.abs
-import kotlin.math.floor
-import kotlin.math.sign
-
-/*
-ISC License
-
-Copyright 2021 Ricardo Matias.
-
-Permission to use, copy, modify, and/or distribute this software for any purpose
-with or without fee is hereby granted, provided that the above copyright notice
-and this permission notice appear in all copies.
-
-THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
-REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
-FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
-INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
-OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
-TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
-THIS SOFTWARE.
-*/
-
-
-/**
- * This is a fast library for computing the Voronoi diagram of a set of two-dimensional points.
- * The Voronoi diagram is constructed by connecting the circumcenters of adjacent triangles
- * in the Delaunay triangulation.
- *
- * @description Port of d3-delaunay (JavaScript) library - https://github.com/d3/d3-delaunay
- * @property points flat positions' array - [x0, y0, x1, y1..]
- *
- * @since 9258fa3 - commit
- * @author Ricardo Matias
- */
-class Voronoi(val delaunay: Delaunay, val bounds: Rectangle) {
-    private val _circumcenters = DoubleArray(delaunay.points.size * 2)
-    lateinit var circumcenters: DoubleArray
-        private set
-
-    val vectors = DoubleArray(delaunay.points.size * 2)
-
-    init {
-        init()
-    }
-
-    fun update() {
-        delaunay.update()
-        init()
-    }
-
-    fun init() {
-        val points = delaunay.points
-
-        if (delaunay.points.isEmpty()) {
-            return
-        }
-
-        val triangles = delaunay.triangles
-        val hull = delaunay.hull
-
-        if (points.size == 2) {
-            _circumcenters[0] = points[0]
-            _circumcenters[1] = points[1]
-            circumcenters = _circumcenters
-            return
-        }
-
-        circumcenters = _circumcenters.copyOf(delaunay.triangles.size / 3 * 2)
-
-        // Compute circumcenters
-        var i = 0
-        var j = 0
-
-        var x: Double
-        var y: Double
-
-        while (i < triangles.size) {
-            val t1 = triangles[i] * 2
-            val t2 = triangles[i + 1] * 2
-            val t3 = triangles[i + 2] * 2
-            val x1 = points[t1]
-            val y1 = points[t1 + 1]
-            val x2 = points[t2]
-            val y2 = points[t2 + 1]
-            val x3 = points[t3]
-            val y3 = points[t3 + 1]
-
-            val dx = x2 - x1
-            val dy = y2 - y1
-            val ex = x3 - x1
-            val ey = y3 - y1
-            val ab = (dx * ey - dy * ex) * 2
-
-            if (abs(ab) < 1e-9) {
-                var a = 1e9
-                val r = triangles[0] * 2
-                a *= sign((points[r] - x1) * ey - (points[r + 1] - y1) * ex)
-                x = (x1 + x3) / 2 - a * ey
-                y = (y1 + y3) / 2 + a * ex
-            } else {
-                val d = 1 / ab
-                val bl = dx * dx + dy * dy
-                val cl = ex * ex + ey * ey
-                x = x1 + (ey * bl - dy * cl) * d
-                y = y1 + (dx * cl - ex * bl) * d
-            }
-
-            circumcenters[j] = x
-            circumcenters[j + 1] = y
-
-            i += 3
-            j += 2
-        }
-
-        // Compute exterior cell rays.
-        var h = hull[hull.size - 1]
-        var p0: Int
-        var p1 = h * 4
-        var x0: Double
-        var x1 = points[2 * h]
-        var y0: Double
-        var y1 = points[2 * h + 1]
-        var y01: Double
-        var x10: Double
-
-        vectors.fill(0.0)
-
-        for (idx in hull.indices) {
-            h = hull[idx]
-            p0 = p1
-            x0 = x1
-            y0 = y1
-            p1 = h * 4
-            x1 = points[2 * h]
-            y1 = points[2 * h + 1]
-
-            y01 = y0 - y1
-            x10 = x1 - x0
-
-            vectors[p0 + 2] = y01
-            vectors[p1] = y01
-            vectors[p0 + 3] = x10
-            vectors[p1 + 1] = x10
-        }
-
-    }
-
-
-
-    private fun cell(i: Int): MutableList<Double>? {
-
-
-
-        val inedges = delaunay.inedges
-        val halfedges = delaunay.halfedges
-        val triangles = delaunay.triangles
-
-        val e0 = inedges[i]
-
-        if (e0 == -1) return null // coincident point
-
-        val points = mutableListOf<Double>()
-
-        var e = e0
-
-        do {
-            val t = floor(e / 3.0).toInt()
-
-            points.add(circumcenters[t * 2])
-            points.add(circumcenters[t * 2 + 1])
-
-            e = if (e % 3 == 2) e - 2 else e + 1 // next half edge
-
-            if (triangles[e] != i) break
-
-            e = halfedges[e]
-        } while (e != e0 && e != -1)
-
-        return points
-    }
-
-    fun neighbors(i: Int) = sequence {
-        val ci = clip(i)
-        if (ci != null) {
-            for (j in delaunay.neighbors(i)) {
-                val cj = clip(j)
-                if (cj != null) {
-                    val li = ci.size
-                    val lj = cj.size
-                    loop@ for (ai in 0 until ci.size step 2) {
-                        for (aj in 0 until cj.size step 2) {
-                            if (ci[ai] == cj[aj]
-                                && ci[ai + 1] == cj[aj + 1]
-                                && ci[(ai + 2) % li] == cj[(aj + lj - 2) % lj]
-                                && ci[(ai + 3) % li] == cj[(aj + lj - 1) % lj]
-                            ) {
-                                yield(j)
-                                break@loop
-                            }
-                        }
-                    }
-                }
-            }
-        }
-    }
-
-    internal fun clip(i: Int): List<Double>? {
-        // degenerate case (1 valid point: return the box)
-        if (i == 0 && delaunay.points.size == 2) {
-            return listOf(
-                bounds.xmax,
-                bounds.ymin,
-                bounds.xmax,
-                bounds.ymax,
-                bounds.xmin,
-                bounds.ymax,
-                bounds.xmin,
-                bounds.ymin
-            )
-        }
-
-        val points = cell(i) ?: return null
-
-        val clipVectors = vectors
-        val v = i * 4
-
-        val a = !clipVectors[v].isFalsy()
-        val b = !clipVectors[v + 1].isFalsy()
-
-        return if (a || b) {
-            this.clipInfinite(i, points, clipVectors[v], clipVectors[v + 1], clipVectors[v + 2], clipVectors[v + 3])
-        } else {
-            this.clipFinite(i, points)
-        }
-    }
-
-    private fun clipInfinite(
-        i: Int,
-        points: MutableList<Double>,
-        vx0: Double,
-        vy0: Double,
-        vxn: Double,
-        vyn: Double
-    ): List<Double>? {
-        var P: MutableList<Double>? = points.mutableCopyOf()
-
-        P!!
-        project(P[0], P[1], vx0, vy0)?.let { p -> P!!.add(0, p[1]); P!!.add(0, p[0]) }
-        project(P[P.size - 2], P[P.size - 1], vxn, vyn)?.let { p -> P!!.add(p[0]); P!!.add(p[1]) }
-
-        P = this.clipFinite(i, P!!)
-        var n = 0
-        if (P != null) {
-            n = P!!.size
-            var c0 = -1
-            var c1 = edgeCode(P[n - 2], P[n - 1])
-            var j = 0
-            var n = P.size
-            while (j < n) {
-                c0 = c1
-                c1 = edgeCode(P[j], P[j + 1])
-                if (c0 != 0 && c1 != 0) {
-                    j = edge(i, c0, c1, P, j)
-                    n = P.size
-                }
-                j += 2
-            }
-        } else if (this.contains(i, (bounds.xmin + bounds.xmax) / 2.0, (bounds.ymin + bounds.ymax) / 2.0)) {
-            P = mutableListOf(
-                bounds.xmin,
-                bounds.ymin,
-                bounds.xmax,
-                bounds.ymin,
-                bounds.xmax,
-                bounds.ymax,
-                bounds.xmin,
-                bounds.ymax
-            )
-        }
-        return P
-    }
-
-    private fun clipFinite(i: Int, points: MutableList<Double>): MutableList<Double>? {
-        val n = points.size
-
-        val P = mutableListOf<Double>()
-        var x0: Double
-        var y0: Double
-        var x1 = points[n - 2]
-        var y1 = points[n - 1]
-        var c0: Int
-        var c1: Int = regionCode(x1, y1)
-        var e0: Int? = null
-        var e1: Int? = 0
-
-        for (j in 0 until n step 2) {
-            x0 = x1
-            y0 = y1
-            x1 = points[j]
-            y1 = points[j + 1]
-            c0 = c1
-            c1 = regionCode(x1, y1)
-
-            if (c0 == 0 && c1 == 0) {
-                e0 = e1
-                e1 = 0
-
-                P.add(x1)
-                P.add(y1)
-            } else {
-                var S: DoubleArray?
-                var sx0: Double
-                var sy0: Double
-                var sx1: Double
-                var sy1: Double
-
-                if (c0 == 0) {
-                    S = clipSegment(x0, y0, x1, y1, c0, c1)
-                    if (S == null) continue
-                    sx0 = S[0]
-                    sy0 = S[1]
-                    sx1 = S[2]
-                    sy1 = S[3]
-                } else {
-                    S = clipSegment(x1, y1, x0, y0, c1, c0)
-                    if (S == null) continue
-                    sx1 = S[0]
-                    sy1 = S[1]
-                    sx0 = S[2]
-                    sy0 = S[3]
-
-                    e0 = e1
-                    e1 = this.edgeCode(sx0, sy0)
-
-                    if (e0 != 0 && e1 != 0) this.edge(i, e0!!, e1, P, P.size)
-
-                    P.add(sx0)
-                    P.add(sy0)
-                }
-
-                e0 = e1
-                e1 = this.edgeCode(sx1, sy1);
-
-                if (e0.isTruthy() && e1.isTruthy()) this.edge(i, e0!!, e1, P, P.size);
-
-                P.add(sx1)
-                P.add(sy1)
-            }
-        }
-
-        if (P.isNotEmpty()) {
-            e0 = e1
-            e1 = this.edgeCode(P[0], P[1])
-
-            if (e0.isTruthy() && e1.isTruthy()) this.edge(i, e0!!, e1!!, P, P.size);
-        } else if (this.contains(i, (bounds.xmin + bounds.xmax) / 2, (bounds.ymin + bounds.ymax) / 2)) {
-            return mutableListOf(
-                bounds.xmax,
-                bounds.ymin,
-                bounds.xmax,
-                bounds.ymax,
-                bounds.xmin,
-                bounds.ymax,
-                bounds.xmin,
-                bounds.ymin
-            )
-        } else {
-            return null
-        }
-        return P
-    }
-
-    private fun clipSegment(x0: Double, y0: Double, x1: Double, y1: Double, c0: Int, c1: Int): DoubleArray? {
-        var nx0: Double = x0
-        var ny0: Double = y0
-        var nx1: Double = x1
-        var ny1: Double = y1
-        var nc0: Int = c0
-        var nc1: Int = c1
-
-        while (true) {
-            if (nc0 == 0 && nc1 == 0) return doubleArrayOf(nx0, ny0, nx1, ny1)
-            // SHAKY STUFF
-            if ((nc0 and nc1) != 0) return null
-
-            var x: Double
-            var y: Double
-            val c: Int = if (nc0 != 0) nc0 else nc1
-
-            when {
-                (c and 0b1000) != 0 -> {
-                    x = nx0 + (nx1 - nx0) * (bounds.ymax - ny0) / (ny1 - ny0)
-                    y = bounds.ymax;
-                }
-                (c and 0b0100) != 0 -> {
-                    x = nx0 + (nx1 - nx0) * (bounds.ymin - ny0) / (ny1 - ny0)
-                    y = bounds.ymin
-                }
-                (c and 0b0010) != 0 -> {
-                    y = ny0 + (ny1 - ny0) * (bounds.xmax - nx0) / (nx1 - nx0)
-                    x = bounds.xmax
-                }
-                else -> {
-                    y = ny0 + (ny1 - ny0) * (bounds.xmin - nx0) / (nx1 - nx0)
-                    x = bounds.xmin;
-                }
-            }
-
-            if (nc0 != 0) {
-                nx0 = x
-                ny0 = y
-                nc0 = this.regionCode(nx0, ny0)
-            } else {
-                nx1 = x
-                ny1 = y
-                nc1 = this.regionCode(nx1, ny1)
-            }
-        }
-    }
-
-    private fun regionCode(x: Double, y: Double): Int {
-        val xcode = when {
-            x < bounds.xmin -> 0b0001
-            x > bounds.xmax -> 0b0010
-            else -> 0b0000
-        }
-        val ycode = when {
-            y < bounds.ymin -> 0b0100
-            y > bounds.ymax -> 0b1000
-            else -> 0b0000
-        }
-        return xcode or ycode
-    }
-
-
-    private fun contains(i: Int, x: Double, y: Double): Boolean {
-        if (x.isNaN() || y.isNaN()) return false
-        return this.delaunay.step(i, x, y) == i;
-    }
-
-    private fun edge(i: Int, e0: Int, e1: Int, p: MutableList<Double>, j: Int): Int {
-        var j = j
-        var e = e0
-        loop@ while (e != e1) {
-            var x: Double = Double.NaN
-            var y: Double = Double.NaN
-
-            when (e) {
-                0b0101 -> { // top-left
-                    e = 0b0100
-                    continue@loop
-                }
-                0b0100 -> { // top
-                    e = 0b0110
-                    x = bounds.xmax
-                    y = bounds.ymin
-                }
-                0b0110 -> { // top-right
-                    e = 0b0010
-                    continue@loop
-                }
-                0b0010 -> { // right
-                    e = 0b1010
-                    x = bounds.xmax
-                    y = bounds.ymax
-                }
-                0b1010 -> { // bottom-right
-                    e = 0b1000
-                    continue@loop
-                }
-                0b1000 -> { // bottom
-                    e = 0b1001
-                    x = bounds.xmin
-                    y = bounds.ymax
-                }
-                0b1001 -> { // bottom-left
-                    e = 0b0001
-                    continue@loop
-                }
-                0b0001 -> { // left
-                    e = 0b0101
-                    x = bounds.xmin
-                    y = bounds.ymin
-                }
-            }
-
-            if (((j < p.size && (p[j] != x)) || ((j + 1) < p.size && p[j + 1] != y)) && contains(i, x, y)) {
-                require(!x.isNaN())
-                require(!y.isNaN())
-                p.add(j, y)
-                p.add(j, x)
-                j += 2
-            } else if (j >= p.size && contains(i, x, y)) {
-                require(!x.isNaN())
-                require(!y.isNaN())
-                p.add(x)
-                p.add(y)
-                j += 2
-            }
-        }
-
-        if (p.size > 4) {
-            var idx = 0
-            var n = p.size
-            while (idx < n) {
-                val j = (idx + 2) % p.size
-                val k = (idx + 4) % p.size
-
-                if ((p[idx] == p[j] && p[j] == p[k])
-                    || (p[idx + 1] == p[j + 1] && p[j + 1] == p[k + 1])
-                ) {
-                    // SHAKY
-                    p.removeAt(j)
-                    p.removeAt(j)
-                    idx -= 2
-                    n -= 2
-                }
-                idx += 2
-            }
-        }
-        return j
-    }
-
-    private fun project(x0: Double, y0: Double, vx: Double, vy: Double): Vector2? {
-        var t = Double.POSITIVE_INFINITY
-        var c: Double
-        var x = Double.NaN
-        var y = Double.NaN
-
-        // top
-        if (vy < 0) {
-            if (y0 <= bounds.ymin) return null
-            c = (bounds.ymin - y0) / vy
-
-            if (c < t) {
-                t = c
-
-                y = bounds.ymin
-                x = x0 + t * vx
-            }
-        } else if (vy > 0) {    // bottom
-            if (y0 >= bounds.ymax) return null
-            c = (bounds.ymax - y0) / vy
-
-            if (c < t) {
-                t = c
-
-                y = bounds.ymax
-                x = x0 + t * vx
-            }
-        }
-        // right
-        if (vx > 0) {
-            if (x0 >= bounds.xmax) return null
-            c = (bounds.xmax - x0) / vx
-
-            if (c < t) {
-                t = c
-
-                x = bounds.xmax
-                y = y0 + t * vy
-            }
-        } else if (vx < 0) { // left
-            if (x0 <= bounds.xmin) return null
-            c = (bounds.xmin - x0) / vx
-
-            if (c < t) {
-                t = c
-
-                x = bounds.xmin
-                y = y0 + t * vy
-            }
-        }
-
-        if (x.isNaN() || y.isNaN()) return null
-
-        return Vector2(x, y)
-    }
-
-    private fun edgeCode(x: Double, y: Double): Int {
-        val xcode = when (x) {
-            bounds.xmin -> 0b0001
-            bounds.xmax -> 0b0010
-            else -> 0b0000
-        }
-        val ycode = when (y) {
-            bounds.ymin -> 0b0100
-            bounds.ymax -> 0b1000
-            else -> 0b0000
-        }
-        return xcode or ycode
-    }
-
-}
-
-private fun Int?.isTruthy(): Boolean {
-    return (this != null && this != 0)
-}
-
-private fun <T> List<T>.mutableCopyOf(): MutableList<T> {
-    val original = this
-    return mutableListOf<T>().apply { addAll(original) }
-}
-
-private val Rectangle.xmin: Double
-    get() = this.corner.x
-
-private val Rectangle.xmax: Double
-    get() = this.corner.x + width
-
-private val Rectangle.ymin: Double
-    get() = this.corner.y
-
-private val Rectangle.ymax: Double
-    get() = this.corner.y + height
-
-private fun Double?.isFalsy() = this == null || this == -0.0 || this == 0.0 || isNaN()
-
diff --git a/icegps-triangulation/src/main/java/com/icegps/triangulation/typealias.kt b/icegps-triangulation/src/main/java/com/icegps/triangulation/typealias.kt
deleted file mode 100644
index 2a696c30..00000000
--- a/icegps-triangulation/src/main/java/com/icegps/triangulation/typealias.kt
+++ /dev/null
@@ -1,7 +0,0 @@
-package com.icegps.triangulation
-
-/**
- * @author tabidachinokaze
- * @date 2025/11/24
- */
-typealias Vector2 = Vector
\ No newline at end of file
diff --git a/math/src/main/java/com/icegps/math/geometry/VectorsDouble.kt b/math/src/main/java/com/icegps/math/geometry/VectorsDouble.kt
index c8981634..41fb9665 100644
--- a/math/src/main/java/com/icegps/math/geometry/VectorsDouble.kt
+++ b/math/src/main/java/com/icegps/math/geometry/VectorsDouble.kt
@@ -121,6 +121,13 @@ data class Vector2D(val x: Double, val y: Double) : IsAlmostEquals<Vector2D> {
     fun distanceTo(x: Int, y: Int): Double = this.distanceTo(x.toDouble(), y.toDouble())
     fun distanceTo(that: Vector2D): Double = distanceTo(that.x, that.y)
 
+    /** Calculates the squared Euclidean distance to [other]. */
+    fun squaredDistanceTo(other: Vector2D): Double {
+        val dx = other.x - x
+        val dy = other.y - y
+        return dx * dx + dy * dy
+    }
+
     infix fun cross(that: Vector2D): Double = crossProduct(this, that)
     infix fun dot(that: Vector2D): Double = ((this.x * that.x) + (this.y * that.y))
 
@@ -195,6 +202,8 @@ data class Vector2D(val x: Double, val y: Double) : IsAlmostEquals<Vector2D> {
         /** DOWN using screen coordinates as reference (0, +1) */
         val DOWN_SCREEN = Vector2D(0.0, +1.0)
 
+        val INFINITY = Vector2D(Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY)
+
 
         inline operator fun invoke(x: Number, y: Number): Vector2D = Vector2D(x.toDouble(), y.toDouble())
         //inline operator fun invoke(x: Float, y: Float): Vector2D = Vector2D(x.toDouble(), y.toDouble())
diff --git a/settings.gradle.kts b/settings.gradle.kts
index 284341f6..60f9c7f9 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -1,5 +1,3 @@
-import org.gradle.internal.os.OperatingSystem
-
 rootProject.name = "orx"
 
 
@@ -36,7 +34,7 @@ dependencyResolutionManagement {
     versionCatalogs {
         // We use a regex to get the openrndr version from the primary catalog as there is no public Gradle API to parse catalogs.
         val regEx = Regex("^openrndr[ ]*=[ ]*(?:\\{[ ]*require[ ]*=[ ]*)?\"(.*)\"[ ]*(?:\\})?", RegexOption.MULTILINE)
-        val openrndrVersion = regEx.find(File(rootDir,"gradle/libs.versions.toml").readText())?.groupValues?.get(1) ?: error("can't find openrndr version")
+        val openrndrVersion = regEx.find(File(rootDir, "gradle/libs.versions.toml").readText())?.groupValues?.get(1) ?: error("can't find openrndr version")
         create("sharedLibs") {
             from("org.openrndr:openrndr-dependency-catalog:$openrndrVersion")
         }
@@ -130,4 +128,5 @@ include(":android")
 include(":math")
 include(":desktop")
 include(":icegps-common")
-include(":icegps-shared")
\ No newline at end of file
+include(":icegps-shared")
+include(":icegps-triangulation")
\ No newline at end of file