[orx-kdtree] Add support for range query in kd-tree (#201)

2021-10-19 02:57:23 -07:00
parent d4309cf2c7
commit dd750e58a0
2 changed files with 80 additions and 0 deletions
--- a/orx-kdtree/src/demo/kotlin/DemoRangeQuery01.kt
+++ b/orx-kdtree/src/demo/kotlin/DemoRangeQuery01.kt
@@ -0,0 +1,39 @@
+import org.openrndr.application
+import org.openrndr.color.ColorRGBa
+import org.openrndr.extra.kdtree.buildKDTree
+import org.openrndr.extra.kdtree.findAllInRange
+import org.openrndr.extra.kdtree.vector2Mapper
+import org.openrndr.math.Vector2
+
+
+fun main() {
+    application {
+
+        configure {
+            width = 1080
+            height = 720
+        }
+
+        program {
+            val points = MutableList(1000) {
+                Vector2(Math.random() * width, Math.random() * height)
+            }
+            val tree = buildKDTree(points, 2, ::vector2Mapper)
+            val radius = 50.0
+
+            extend {
+                drawer.circles(points, 5.0)
+
+                val allInRange = findAllInRange(tree, mouse.position, maxDistance = radius, dimensions = 2, ::vector2Mapper)
+                drawer.fill = ColorRGBa.PINK
+                drawer.stroke = ColorRGBa.PINK
+                drawer.strokeWeight = 2.0
+                drawer.circles(allInRange, 7.0)
+
+                drawer.fill = null
+                drawer.strokeWeight = 1.0
+                drawer.circle(mouse.position, radius)
+            }
+        }
+    }
+}