import org.openrndr.application import org.openrndr.color.ColorRGBa import org.openrndr.extra.kdtree.kdTree 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 = points.kdTree() val radius = 50.0 extend { drawer.circles(points, 5.0) val allInRange = tree.findAllInRadius(mouse.position, radius = radius) 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) } } } }