import org.openrndr.application
import org.openrndr.color.ColorRGBa
import org.openrndr.extra.shapes.grid
import org.openrndr.extra.triangulation.delaunayTriangulation
import org.openrndr.shape.Circle

fun main() {
    application {
        configure {
            width = 720
            height = 720
        }
        program {
            extend {
                val r = drawer.bounds.offsetEdges(-50.0)
                val grid = r.grid(8, 8).flatten()
                val circles = grid.map { Circle(it.center, it.width / 4.0) }
                val points = circles.flatMap { it.contour.equidistantPositions(6) }
                drawer.circles(points, 5.0)
                val d = points.delaunayTriangulation()
                drawer.stroke = ColorRGBa.PINK
                drawer.contours(d.halfedges())

                drawer.stroke = ColorRGBa.YELLOW
                drawer.fill = null
                drawer.contours(d.voronoiDiagram(drawer.bounds.offsetEdges(-50.0)).cellPolygons())

                drawer.stroke = ColorRGBa.GRAY
                drawer.contours(d.triangles().map { it.contour })
            }
        }
    }
}