[orx-shapes] Add gradient to BezierPatch

2020-10-12 22:31:25 +02:00
parent f980989ff6
commit 14434ec93b
2 changed files with 92 additions and 7 deletions
--- a/orx-shapes/src/demo/kotlin/DemoBezierPatch04.kt
+++ b/orx-shapes/src/demo/kotlin/DemoBezierPatch04.kt
@@ -0,0 +1,42 @@
+import org.openrndr.application
+import org.openrndr.color.ColorRGBa
+import org.openrndr.extensions.Screenshots
+import org.openrndr.extensions.SingleScreenshot
+import org.openrndr.extra.shapes.bezierPatch
+import org.openrndr.shape.Circle
+
+fun main() {
+    application {
+        configure {
+            width = 800
+            height = 800
+        }
+        program {
+            if (System.getProperty("takeScreenshot") == "true") {
+                extend(SingleScreenshot()) {
+                    this.outputFile = System.getProperty("screenshotPath")
+                }
+            }
+            extend {
+                drawer.clear(ColorRGBa.PINK)
+                val bp = bezierPatch(Circle(width / 2.0, height / 2.0, 350.0).contour)
+
+                for (i in 0..50) {
+                    drawer.stroke = ColorRGBa.BLACK.opacify(1.0)
+                }
+
+                for (j in 1 until 50 step 2) {
+                    for (i in 1 until 50 step 2) {
+                        val p = bp.position(i / 50.0, j / 50.0)
+                        val g2 = bp.gradient(i / 50.0, j / 50.0).normalized
+                        val g = g2.perpendicular()
+                        drawer.lineSegment(p, p + g2 * 10.0)
+                        drawer.lineSegment(p, p - g2 * 10.0)
+                        drawer.lineSegment(p, p + g * 10.0)
+                        drawer.lineSegment(p, p - g * 10.0)
+                    }
+                }
+            }
+        }
+    }
+}