[orx-shapes] Improve contour adjuster framework

orx-shapes/README.md

@@ -39,6 +39,21 @@ Collection of 2D shape generators and modifiers.
 
 ![DemoAdjustContour07Kt](https://raw.githubusercontent.com/openrndr/orx/media/orx-shapes/images/DemoAdjustContour07Kt.png)
 
+### DemoAdjustContour08
+[source code](src/jvmDemo/kotlin/DemoAdjustContour08.kt)
+
+![DemoAdjustContour08Kt](https://raw.githubusercontent.com/openrndr/orx/media/orx-shapes/images/DemoAdjustContour08Kt.png)
+
+### DemoAdjustContour09
+[source code](src/jvmDemo/kotlin/DemoAdjustContour09.kt)
+
+![DemoAdjustContour09Kt](https://raw.githubusercontent.com/openrndr/orx/media/orx-shapes/images/DemoAdjustContour09Kt.png)
+
+### DemoAdjustContourContinue01
+[source code](src/jvmDemo/kotlin/DemoAdjustContourContinue01.kt)
+
+![DemoAdjustContourContinue01Kt](https://raw.githubusercontent.com/openrndr/orx/media/orx-shapes/images/DemoAdjustContourContinue01Kt.png)
+
 ### DemoAlphaShape
 [source code](src/jvmDemo/kotlin/DemoAlphaShape.kt)
 

orx-shapes/build.gradle.kts

@@ -15,6 +15,7 @@ kotlin {
                 implementation(libs.openrndr.draw)
                 implementation(libs.openrndr.filter)
                 implementation(libs.kotlin.reflect)
+                implementation(libs.kotlin.coroutines)
             }
         }
 

orx-shapes/src/commonMain/kotlin/Circle.kt

@@ -1,3 +1,5 @@
+package org.openrndr.extra.shapes
+
 import org.openrndr.math.Polar
 import org.openrndr.math.Vector2
 import org.openrndr.math.transforms.buildTransform

orx-shapes/src/commonMain/kotlin/adjust/ContourAdjuster.kt

@@ -2,7 +2,17 @@ package org.openrndr.extra.shapes.adjust
 
 import org.openrndr.collections.pop
 import org.openrndr.extra.shapes.vertex.ContourVertex
+import org.openrndr.math.Vector2
+import org.openrndr.shape.Segment
 import org.openrndr.shape.ShapeContour
+import kotlin.jvm.JvmName
+
+
+class ContourAdjusterStatus(
+    val contour: ShapeContour,
+    val selectedSegments: List<Segment>,
+    val selectedPoints: List<Vector2>
+)
 
 
 /**
@@ -17,6 +27,7 @@ class ContourAdjuster(var contour: ShapeContour) {
         var clearSelectedEdges: Boolean = false,
         var clearSelectedVertices: Boolean = false
     )
+
     var parameters = Parameters()
 
     val parameterStack = ArrayDeque<Parameters>()
@@ -75,6 +86,15 @@ class ContourAdjuster(var contour: ShapeContour) {
         popVertexSelection()
     }
 
+
+    val status: ContourAdjusterStatus
+        get() {
+            return ContourAdjusterStatus(contour,
+                edgeSelection.map { contour.segments[it] },
+                vertexSelection.map { if (it < contour.segments.size) contour.segments[it].start else contour.segments[it - 1].end }
+            )
+        }
+
     /**
      * the selected vertex
      */
@@ -149,7 +169,6 @@ class ContourAdjuster(var contour: ShapeContour) {
     }
 
 
-
     /**
      * select multiple vertices using an index-vertex based [predicate]
      */
@@ -273,3 +292,12 @@ fun adjustContour(contour: ShapeContour, adjuster: ContourAdjuster.() -> Unit):
     ca.apply(adjuster)
     return ca.contour
 }
+
+@JvmName("adjustContourSequenceStatus")
+fun adjustContourSequence(
+    contour: ShapeContour,
+    adjuster: ContourAdjuster.() -> Sequence<ContourAdjusterStatus>
+): Sequence<ContourAdjusterStatus> {
+    val ca = ContourAdjuster(contour)
+    return ca.adjuster()
+}

orx-shapes/src/commonMain/kotlin/adjust/ContourAdjusterEdge.kt

@@ -105,4 +105,13 @@ data class ContourAdjusterEdge(val contourAdjuster: ContourAdjuster, val segment
                 .subbed(t0, t1)
                 .contour
     }
+
+    fun moveStartBy(translation: Vector2, updateTangents: Boolean = true) = wrap { startMovedBy(translation, updateTangents) }
+
+    fun moveControl0By(translation: Vector2) = wrap { control0MovedBy(translation) }
+
+    fun moveControl1By(translation: Vector2) = wrap { control1MovedBy(translation) }
+    fun moveEndBy(translation: Vector2, updateTangents: Boolean = true) = wrap { startMovedBy(translation, updateTangents) }
+
+
 }

orx-shapes/src/commonMain/kotlin/adjust/ContourAdjusterVertex.kt

@@ -4,7 +4,7 @@ import org.openrndr.extra.shapes.vertex.ContourVertex
 import org.openrndr.math.Vector2
 
 class ContourAdjusterVertex(val contourAdjuster: ContourAdjuster, val segmentIndex: () -> Int) {
-    private fun wrap(block: ContourVertex.() -> ContourVertex) {
+    fun wrap(block: ContourVertex.() -> ContourVertex) {
         val newVertex = ContourVertex(contourAdjuster.contour, segmentIndex()).block()
         contourAdjuster.contour = newVertex.contour
         contourAdjuster.updateSelection(newVertex.adjustments)
@@ -43,7 +43,19 @@ class ContourAdjusterVertex(val contourAdjuster: ContourAdjuster, val segmentInd
         contourAdjuster.selectVertex(segmentIndex())
     }
 
+    val controlIn: Vector2?
+        get() =   ContourVertex(contourAdjuster.contour, segmentIndex()).controlIn
+
+    val controlOut: Vector2?
+        get() =   ContourVertex(contourAdjuster.contour, segmentIndex()).controlOut
+
+
     fun remove(updateTangents: Boolean = true) = wrap { remove(updateTangents) }
+
+    fun moveControlInBy(translation: Vector2) = wrap { controlInMovedBy(translation) }
+
+    fun moveControlOutBy(translation: Vector2) = wrap { controlOutMovedBy(translation) }
+
     fun moveBy(translation: Vector2, updateTangents: Boolean = true) = wrap { movedBy(translation, updateTangents) }
     fun moveTo(position: Vector2, updateTangents: Boolean = true) = wrap { movedBy(position - this.position, updateTangents) }
     fun rotate(rotationInDegrees: Double) = wrap { rotatedBy(rotationInDegrees) }

orx-shapes/src/commonMain/kotlin/adjust/ContourEdge.kt

@@ -11,7 +11,12 @@ import org.openrndr.shape.SegmentType
 import org.openrndr.shape.ShapeContour
 import kotlin.math.abs
 
-internal fun Vector2.transformedBy(t: Matrix44) = (t * (this.xy01)).xy
+internal fun Vector2.transformedBy(t: Matrix44, mask: Int = 0x0f, maskRef: Int = 0x0f) =
+    if ((mask and maskRef) != 0)
+        (t * (this.xy01)).xy else {
+        this
+    }
+
 fun <E> List<E>.update(vararg updates: Pair<Int, E>): List<E> {
     if (updates.isEmpty()) {
         return this
@@ -209,16 +214,36 @@ data class ContourEdge(
     }
 
 
+    enum class ControlMask(val mask: Int) {
+        START(1),
+        CONTROL0(2),
+        CONTROL1(4),
+        END(8)
+    }
+
+    fun maskOf(vararg control: ControlMask): Int {
+        var mask = 0
+        for (c in control) {
+            mask = mask or c.mask
+        }
+        return mask
+    }
+
     /**
      * apply [transform] to the edge
      * @param transform a [Matrix44]
      */
-    fun transformedBy(transform: Matrix44, updateTangents: Boolean = true): ContourEdge {
-        val segment = contour.segments[segmentIndex]
+    fun transformedBy(
+        transform: Matrix44,
+        updateTangents: Boolean = true,
+        mask: Int = 0xf,
+        promoteToCubic: Boolean = false
+    ): ContourEdge {
+        val segment = contour.segments[segmentIndex].let { if (promoteToCubic) it.cubic else it }
         val newSegment = segment.copy(
-            start = segment.start.transformedBy(transform),
-            control = segment.control.map { it.transformedBy(transform) },
-            end = segment.end.transformedBy(transform)
+            start = segment.start.transformedBy(transform, mask, ControlMask.START.mask),
+            control = segment.control.mapIndexed { index, it -> it.transformedBy(transform, mask, 1 shl (index + 1)) },
+            end = segment.end.transformedBy(transform, mask, ControlMask.END.mask)
         )
         val segmentInIndex = if (contour.closed) (segmentIndex - 1).mod(contour.segments.size) else segmentIndex - 1
         val segmentOutIndex = if (contour.closed) (segmentIndex + 1).mod(contour.segments.size) else segmentIndex + 1
@@ -255,6 +280,25 @@ data class ContourEdge(
         return ContourEdge(ShapeContour.fromSegments(newSegments, contour.closed), segmentIndex)
     }
 
+    fun startMovedBy(translation: Vector2, updateTangents: Boolean = true): ContourEdge =
+        transformedBy(buildTransform {
+            translate(translation)
+        }, updateTangents = updateTangents, mask = maskOf(ControlMask.START))
+
+    fun control0MovedBy(translation: Vector2): ContourEdge = transformedBy(buildTransform {
+        translate(translation)
+    }, updateTangents = false, mask = maskOf(ControlMask.CONTROL0), promoteToCubic = true)
+
+    fun control1MovedBy(translation: Vector2): ContourEdge = transformedBy(buildTransform {
+        translate(translation)
+    }, updateTangents = false, mask = maskOf(ControlMask.CONTROL1), promoteToCubic = true)
+
+    fun endMovedBy(translation: Vector2, updateTangents: Boolean = true): ContourEdge {
+        return transformedBy(buildTransform {
+            translate(translation)
+        }, updateTangents = updateTangents, mask = maskOf(ControlMask.END))
+    }
+
     fun movedBy(translation: Vector2, updateTangents: Boolean = true): ContourEdge {
         return transformedBy(buildTransform {
             translate(translation)

orx-shapes/src/commonMain/kotlin/adjust/ContourVertex.kt

@@ -47,6 +47,33 @@ data class ContourVertex(
             }
         }
 
+    val controlIn: Vector2?
+        get() {
+            return if (contour.closed || (segmentIndex > 0 && segmentIndex < contour.segments.size)) {
+                contour.segments[(segmentIndex-1).mod(contour.segments.size)].cubic.control[1]
+            } else if (segmentIndex == 0) {
+                null
+            } else {
+                contour.segments[segmentIndex-1].cubic.control[1]
+            }
+        }
+    val controlOut: Vector2?
+        get() {
+            return if (contour.closed || segmentIndex < contour.segments.size) {
+                contour.segments[segmentIndex].cubic.control[0]
+            } else {
+                null
+            }
+        }
+
+    val tangentIn: Vector2?
+        get() = controlIn?.minus(position)
+
+    val tangentOut: Vector2?
+        get() = controlOut?.minus(position)
+
+
+
     fun remove(updateTangents: Boolean = true): ContourVertex {
         if (contour.empty) {
             return withoutAdjustments()
@@ -67,6 +94,27 @@ data class ContourVertex(
         return ContourVertex(ShapeContour.fromSegments(newSegments, contour.closed), segmentIndex, adjustments)
     }
 
+    fun controlInMovedBy(translation: Vector2): ContourVertex {
+        if (contour.empty) {
+            return withoutAdjustments()
+        }
+        val transform = buildTransform {
+            translate(translation)
+        }
+
+        return transformTangents(transform, Matrix44.IDENTITY)
+    }
+
+    fun controlOutMovedBy(translation: Vector2): ContourVertex {
+        if (contour.empty) {
+            return withoutAdjustments()
+        }
+        val transform = buildTransform {
+            translate(translation)
+        }
+        return transformTangents(Matrix44.IDENTITY, transform)
+    }
+
     fun scaledBy(scaleFactor: Double): ContourVertex {
         if (contour.empty) {
             return withoutAdjustments()
@@ -96,14 +144,17 @@ data class ContourVertex(
             return withoutAdjustments()
         }
         val newSegments = contour.segments.map { it }.toMutableList()
-        val refOut = contour.segments[segmentIndex]
+        val refOut = contour.segments.getOrNull(segmentIndex)
         val refIn = if (contour.closed) contour.segments[(segmentIndex - 1).mod(contour.segments.size)] else
             contour.segments.getOrNull(segmentIndex - 1)
+
+        if (refOut != null) {
             newSegments[segmentIndex] = run {
                 val cubicSegment = refOut.cubic
                 val newControls = listOf((transformOut * cubicSegment.control[0].xy01).xy, cubicSegment.control[1])
                 refOut.copy(control = newControls)
             }
+        }
         val segmentIndexIn = (segmentIndex - 1).mod(contour.segments.size)
         if (refIn != null) {
             newSegments[segmentIndexIn] = run {

orx-shapes/src/commonMain/kotlin/adjust/extensions/TangentAverage.kt

@@ -0,0 +1,22 @@
+package org.openrndr.extra.shapes.adjust.extensions
+
+import org.openrndr.extra.shapes.adjust.ContourAdjusterVertex
+import org.openrndr.extra.shapes.vertex.ContourVertex
+
+fun ContourVertex.tangentsAveraged(): ContourVertex {
+    if (contour.empty || tangentIn == null || tangentOut == null) return withoutAdjustments()
+
+    val sum = (tangentIn!! - tangentOut!!).normalized
+    val lengthIn = tangentIn!!.length
+    val lengthOut = tangentOut!!.length
+
+    val positionIn = position + sum * lengthIn
+    val positionOut = position - sum * lengthOut
+
+    return controlOutMovedBy(positionOut - controlOut!!).controlInMovedBy(positionIn - controlIn!!)
+}
+
+/**
+ * Average the in and out tangents
+ */
+fun ContourAdjusterVertex.averageTangents() = wrap { tangentsAveraged() }

orx-shapes/src/commonMain/kotlin/adjust/extensions/TangentReflection.kt

@@ -0,0 +1,39 @@
+package org.openrndr.extra.shapes.adjust.extensions
+
+import org.openrndr.extra.shapes.adjust.ContourAdjusterVertex
+import org.openrndr.extra.shapes.vertex.ContourVertex
+import org.openrndr.math.transforms.buildTransform
+
+fun ContourVertex.tangentInReflectedToOut(tangentScale: Double = 1.0): ContourVertex {
+    if (contour.empty || tangentIn == null || tangentOut == null) return withoutAdjustments()
+    return controlOutMovedBy(position - tangentIn!! * tangentScale - controlOut!!)
+}
+
+fun ContourVertex.tangentOutReflectedToIn(tangentScale: Double = 1.0): ContourVertex {
+    if (contour.empty || tangentIn == null || tangentOut == null) return withoutAdjustments()
+    return controlInMovedBy(position - tangentOut!! * tangentScale - controlIn!!)
+}
+
+fun ContourVertex.switchedTangents(preserveLength: Boolean = false): ContourVertex {
+    if (contour.empty || tangentIn == null || tangentOut == null) return withoutAdjustments()
+
+    val sIn = if (preserveLength) tangentIn!!.length / tangentOut!!.length else 1.0
+    val sOut = if (preserveLength) 1.0 / sIn else 1.0
+
+    val newControlIn = position + tangentOut!! * sIn
+    val newControlOut = position + tangentIn!! * sOut
+
+    return transformTangents(
+        buildTransform { translate(newControlIn - controlIn!!) },
+        buildTransform { translate(newControlOut - controlOut!!) })
+}
+
+/**
+ * Switch in and out tangents
+ */
+fun ContourAdjusterVertex.switchTangents(preserveLength: Boolean = false) = wrap { switchedTangents(preserveLength) }
+
+
+fun ContourAdjusterVertex.reflectTangentInToOut(tangentScale: Double) = wrap { tangentInReflectedToOut(tangentScale) }
+
+fun ContourAdjusterVertex.reflectTangentOutToIn(tangentScale: Double) = wrap { tangentOutReflectedToIn(tangentScale) }

orx-shapes/src/commonMain/kotlin/tunni/Tunni.kt

@@ -58,6 +58,7 @@ fun Segment.withTunniPoint(tunniPoint: Vector2): Segment {
  * @since orx 0.4.5
  */
 fun Segment.withTunniLine(pointOnLine: Vector2): Segment {
+    println("hoi! $pointOnLine")
     val ls = LineSegment(pointOnLine, pointOnLine + this.cubic.control[0] - this.cubic.control[1])
     val ac0 = LineSegment(start, this.cubic.control[0])
     val bc1 = LineSegment(end, this.cubic.control[1])
@@ -66,6 +67,10 @@ fun Segment.withTunniLine(pointOnLine: Vector2): Segment {
     val cp1 = intersection(ls, bc1, Double.POSITIVE_INFINITY)
 
     return if (cp0 != Vector2.INFINITY && cp1 != Vector2.INFINITY) {
+        println("$cp0 $cp1")
         copy(start, listOf(cp0, cp1), end)
-    } else this
+    } else {
+        println("${cp0} ${cp1}")
+        this
+    }
 }

orx-shapes/src/commonMain/kotlin/tunni/TunniContourEdgeExtensions.kt

@@ -44,7 +44,7 @@ fun ContourEdge.withTunniLine(pointOnLine: Vector2): ContourEdge {
     if (contour.empty) {
         return withoutAdjustments()
     } else {
-        val segment = contour.segments[segmentIndex].withTunniPoint(pointOnLine)
+        val segment = contour.segments[segmentIndex].withTunniLine(pointOnLine)
         val newSegments = contour.segments.map { it }.toMutableList()
         newSegments[segmentIndex] = segment
         return ContourEdge(ShapeContour.fromSegments(newSegments, contour.closed), segmentIndex)

orx-shapes/src/jvmDemo/kotlin/adjust/DemoAdjustContour01.kt

@@ -1,3 +1,5 @@
+//package adjust
+
 import org.openrndr.application
 import org.openrndr.color.ColorRGBa
 import org.openrndr.extra.shapes.adjust.adjustContour

orx-shapes/src/jvmDemo/kotlin/adjust/DemoAdjustContour02.kt

@@ -1,3 +1,5 @@
+//package adjust
+
 import org.openrndr.application
 import org.openrndr.color.ColorRGBa
 import org.openrndr.extra.shapes.adjust.adjustContour

orx-shapes/src/jvmDemo/kotlin/adjust/DemoAdjustContour03.kt

@@ -1,3 +1,5 @@
+//package adjust
+
 import org.openrndr.application
 import org.openrndr.color.ColorRGBa
 import org.openrndr.extra.shapes.adjust.adjustContour

orx-shapes/src/jvmDemo/kotlin/adjust/DemoAdjustContour04.kt

@@ -1,3 +1,5 @@
+//package adjust
+
 import org.openrndr.application
 import org.openrndr.color.ColorRGBa
 import org.openrndr.extra.shapes.adjust.adjustContour

orx-shapes/src/jvmDemo/kotlin/adjust/DemoAdjustContour05.kt

@@ -1,3 +1,5 @@
+//package adjust
+
 import org.openrndr.application
 import org.openrndr.color.ColorRGBa
 import org.openrndr.extra.shapes.adjust.adjustContour

orx-shapes/src/jvmDemo/kotlin/adjust/DemoAdjustContour06.kt

@@ -1,3 +1,5 @@
+//package adjust
+
 import org.openrndr.application
 import org.openrndr.color.ColorRGBa
 import org.openrndr.extra.shapes.adjust.adjustContour

orx-shapes/src/jvmDemo/kotlin/adjust/DemoAdjustContour07.kt

@@ -1,3 +1,5 @@
+//package adjust
+
 import org.openrndr.application
 import org.openrndr.color.ColorRGBa
 import org.openrndr.extra.shapes.adjust.adjustContour

orx-shapes/src/jvmDemo/kotlin/adjust/DemoAdjustContour08.kt

@@ -0,0 +1,52 @@
+//package adjust
+
+import org.openrndr.application
+import org.openrndr.color.ColorRGBa
+import org.openrndr.extra.shapes.adjust.adjustContour
+import org.openrndr.math.Vector2
+import org.openrndr.shape.contour
+import kotlin.math.cos
+
+fun main() {
+    application {
+        configure {
+            width = 800
+            height = 800
+        }
+        program {
+            extend {
+                var contour = contour {
+                    moveTo(drawer.bounds.position(0.5, 0.1) - Vector2(300.0, 0.0))
+                    lineTo(drawer.bounds.position(0.5, 0.1) + Vector2(300.0, 0.0))
+                }
+
+                contour = adjustContour(contour) {
+                    selectVertex(0)
+                    vertex.moveControlOutBy(Vector2(0.0, 100.0))
+
+                    selectVertex(1)
+                    vertex.moveControlInBy(Vector2(0.0, -100.0))
+
+                }
+                drawer.stroke = ColorRGBa.RED
+                drawer.contour(contour)
+
+
+                contour = contour {
+                    moveTo(drawer.bounds.position(0.5, 0.2) - Vector2(300.0, 0.0))
+                    lineTo(drawer.bounds.position(0.5, 0.2) + Vector2(300.0, 0.0))
+                }
+
+                contour = adjustContour(contour) {
+                    selectEdge(0)
+                    edge.moveControl0By(Vector2(0.0, 100.0))
+                    edge.moveControl1By(Vector2(0.0, -100.0))
+
+                }
+                drawer.stroke = ColorRGBa.RED
+                drawer.contour(contour)
+
+            }
+        }
+    }
+}

orx-shapes/src/jvmDemo/kotlin/adjust/DemoAdjustContour09.kt

@@ -0,0 +1,60 @@
+//package adjust
+
+import org.openrndr.application
+import org.openrndr.color.ColorRGBa
+import org.openrndr.extra.shapes.adjust.adjustContour
+import org.openrndr.extra.shapes.adjust.extensions.averageTangents
+import org.openrndr.extra.shapes.adjust.extensions.switchTangents
+import org.openrndr.extra.shapes.tunni.tunniLine
+import org.openrndr.extra.shapes.tunni.tunniPoint
+import kotlin.math.sqrt
+
+fun main() {
+    application {
+        configure {
+            width = 800
+            height = 800
+        }
+        program {
+            extend {
+                drawer.clear(ColorRGBa.WHITE)
+                var contour = drawer.bounds.offsetEdges(-200.0).contour
+
+                drawer.fill = null
+
+                contour = adjustContour(contour) {
+                    selectVertices(0, 1)
+                    for (v in vertices) {
+                        v.averageTangents()
+                        v.scale(sqrt(2.0))
+                        v.rotate(45.0)
+                    }
+
+                    selectVertices(2)
+                    for (v in vertices) {
+                        v.switchTangents()
+                    }
+                }
+                drawer.stroke = ColorRGBa.BLACK
+                drawer.contour(contour)
+
+                drawer.stroke = ColorRGBa.RED
+
+                for (s in contour.segments) {
+                    drawer.lineSegment(s.start, s.cubic.control[0])
+                    drawer.lineSegment(s.end, s.cubic.control[1])
+                }
+                drawer.fill = ColorRGBa.BLACK
+                drawer.stroke = null
+                drawer.circles(contour.segments.map { it.start }, 5.0)
+
+                drawer.stroke = ColorRGBa.GRAY
+                for (s in contour.segments) {
+                    drawer.lineSegment(s.tunniLine)
+                    drawer.fill = ColorRGBa.CYAN
+                    drawer.circle(s.tunniPoint, 5.0)
+                }
+            }
+        }
+    }
+}

orx-shapes/src/jvmDemo/kotlin/adjust/DemoAdjustContourContinue01.kt

@@ -0,0 +1,102 @@
+//package adjust
+
+import kotlinx.coroutines.yield
+import org.openrndr.application
+import org.openrndr.color.ColorRGBa
+import org.openrndr.extra.shapes.adjust.adjustContourSequence
+import org.openrndr.extra.shapes.tunni.tunniLine
+import org.openrndr.extra.shapes.tunni.tunniPoint
+import org.openrndr.extra.shapes.tunni.withTunniLine
+import org.openrndr.launch
+import org.openrndr.math.Vector2
+import org.openrndr.shape.Segment
+import kotlin.math.cos
+
+fun main() {
+    application {
+        configure {
+            width = 800
+            height = 800
+        }
+        program {
+
+            var res = drawer.bounds.offsetEdges(-200.0).contour
+            var selectedSegments = emptyList<Segment>()
+            var selectedPoints = emptyList<Vector2>()
+
+            val contourSeq = adjustContourSequence(res) {
+
+                sequence {
+                    for (i in 0 until 1000) {
+                        selectEdges()
+                        selectVertices((i*7).mod(4))
+                        for (v in vertices) {
+                            for (j in 0 until 30) {
+                                v.rotate(45.0/30.0)
+                                yield(status)
+                            }
+                        }
+
+                        selectVertices((i*3).mod(4))
+                        for (v in vertices) {
+                            yield(status)
+
+                        }
+
+
+                        selectVertices()
+                        selectEdges(i.mod(4))
+                        for (j in 0 until 30) {
+                            for (e in edges) {
+                                e.withTunniLine(e.tunniLine.position(0.5) + e.tunniLine.normal * cos(i.toDouble() + e.segmentIndex()) * 50.0/30.0)
+                                yield(status)
+                            }
+                        }
+                    }
+                }
+            }
+
+            launch {
+                for (i in contourSeq) {
+                    res = i.contour
+                    selectedPoints = i.selectedPoints
+                    selectedSegments = i.selectedSegments
+                    yield()
+                }
+            }
+
+
+            extend {
+                drawer.clear(ColorRGBa.WHITE)
+                drawer.stroke = ColorRGBa.BLACK
+                drawer.contour(res)
+
+                drawer.stroke = ColorRGBa.RED
+
+                for (s in res.segments) {
+                    drawer.lineSegment(s.start, s.cubic.control[0])
+                    drawer.lineSegment(s.end, s.cubic.control[1])
+                }
+                drawer.fill = ColorRGBa.BLACK
+                drawer.stroke = null
+                drawer.circles(res.segments.map { it.start }, 5.0)
+
+                drawer.stroke = ColorRGBa.GRAY
+                for (s in res.segments) {
+                    drawer.lineSegment(s.tunniLine)
+                    drawer.fill = ColorRGBa.CYAN
+                    drawer.circle(s.tunniPoint, 5.0)
+                }
+
+                drawer.stroke = ColorRGBa.MAGENTA
+                drawer.strokeWeight = 3.0
+                for (s in selectedSegments) {
+                    drawer.segment(s)
+                }
+                for (p in selectedPoints) {
+                    drawer.circle(p, 5.0)
+                }
+            }
+        }
+    }
+}

orx-shapes/src/jvmTest/kotlin/TestAdjustContour.kt

@@ -6,6 +6,8 @@ import kotlin.math.cos
 import kotlin.math.sin
 import kotlin.test.Test
 import kotlin.test.assertEquals
+import kotlin.test.assertNotNull
+import kotlin.test.assertNull
 
 
 class TestAdjustContour {
@@ -25,6 +27,31 @@ class TestAdjustContour {
         assertEquals(150.0, adjusted.segments[0].end.y, 1E-6)
     }
 
+
+    @Test
+    fun testSingleLinearSegmentMoveControlIn() {
+        val adjusted = adjustContour(LineSegment(0.0, 0.0, 100.0, 100.0).contour) {
+            selectVertex(0)
+            for (v in vertices) {
+                assertNull(v.controlIn)
+                assertNotNull(v.controlOut)
+                v.moveControlOutBy(Vector2(20.0, 20.0))
+
+            }
+
+
+            selectVertex(1)
+            for (v in vertices) {
+                assertNull(v.controlOut)
+                assertNotNull(v.controlIn)
+                v.moveControlInBy(Vector2(20.0, 20.0))
+            }
+
+        }
+
+    }
+
+
     @Test
     fun testSingleLinearSegmentDefaultVertexSelection() {
         val adjusted = adjustContour(LineSegment(0.0, 0.0, 100.0, 100.0).contour) {