[orx-marching-squares] Add orx-marching-squares module

2023-02-02 18:24:07 +01:00
parent 4422f114ba
commit 5038fd0fc3
9 changed files with 265 additions and 0 deletions
--- a/orx-marching-squares/src/jvmDemo/kotlin/FindContours04.kt
+++ b/orx-marching-squares/src/jvmDemo/kotlin/FindContours04.kt
@@ -0,0 +1,36 @@
+import org.openrndr.application
+import org.openrndr.color.ColorRGBa
+import org.openrndr.draw.grayscale
+import org.openrndr.draw.loadImage
+import org.openrndr.extra.marchingsquares.findContours
+import org.openrndr.math.Vector2
+import kotlin.math.PI
+import kotlin.math.cos
+import kotlin.math.sin
+
+fun main() {
+    application {
+        configure {
+            width = 640
+            height = 480
+        }
+        program {
+            val image = loadImage("demo-data/images/image-001.png")
+            image.shadow.download()
+            extend {
+                drawer.clear(ColorRGBa.BLACK)
+                drawer.stroke = ColorRGBa.BLACK
+                fun f(v: Vector2): Double {
+                    val iv = v.toInt()
+                    val d = if (iv.x >= 0 && iv.y >= 0 && iv.x < image.width && iv.y < image.height) image.shadow[iv.x, iv.y].luminance else 0.0
+                    return cos(d * PI * 8.0 + seconds)
+                }
+
+                val segments = findContours(::f, drawer.bounds.offsetEdges(32.0), 4.0)
+                drawer.drawStyle.colorMatrix = grayscale()
+                drawer.image(image)
+                drawer.lineSegments(segments)
+            }
+        }
+    }
+}