From c5a95f8d1703551d1aa284397d8679608727f0eb Mon Sep 17 00:00:00 2001
From: Edwin Jakobs <edwin@rndr.studio>
Date: Mon, 30 Aug 2021 15:35:22 +0200
Subject: [PATCH] [orx-shapes] Fix buffer resizing code in drawer.bezierPatches

---
 .../kotlin/drawers/BezierPatchDrawer.kt       |  8 ++--
 .../src/demo/kotlin/DemoBezierPatches01.kt    | 44 +++++++++++++++++++
 2 files changed, 48 insertions(+), 4 deletions(-)
 create mode 100644 orx-shapes/src/demo/kotlin/DemoBezierPatches01.kt

diff --git a/orx-shapes/src/commonMain/kotlin/drawers/BezierPatchDrawer.kt b/orx-shapes/src/commonMain/kotlin/drawers/BezierPatchDrawer.kt
index 4c95a1c8..71151a26 100644
--- a/orx-shapes/src/commonMain/kotlin/drawers/BezierPatchDrawer.kt
+++ b/orx-shapes/src/commonMain/kotlin/drawers/BezierPatchDrawer.kt
@@ -162,7 +162,7 @@ class BezierPatchDrawer {
     internal fun ensureVertexCount(count: Int) {
         if (vertices.vertexCount < count) {
             vertices.destroy()
-            vertexBuffer(
+            vertices = vertexBuffer(
                 vertexFormat {
                     position(3)
                     color(4)
@@ -213,7 +213,7 @@ class BezierPatchDrawer {
         shader.end()
     }
 
-    @JvmName("drawBezierPatchOKLab")
+    @JvmName("drawBezierPatchesOKLab")
     fun drawBezierPatches(
         context: DrawContext,
         drawStyle: DrawStyle,
@@ -260,7 +260,7 @@ class BezierPatchDrawer {
         shader.end()
     }
 
-    @JvmName("drawBezierPatch3D")
+    @JvmName("drawBezierPatches3D")
     fun drawBezierPatches(
         context: DrawContext,
         drawStyle: DrawStyle,
@@ -304,7 +304,7 @@ class BezierPatchDrawer {
         shader.end()
     }
 
-    @JvmName("drawBezierPatch3DOKLab")
+    @JvmName("drawBezierPatches3DOKLab")
     fun drawBezierPatches(
         context: DrawContext,
         drawStyle: DrawStyle,
diff --git a/orx-shapes/src/demo/kotlin/DemoBezierPatches01.kt b/orx-shapes/src/demo/kotlin/DemoBezierPatches01.kt
new file mode 100644
index 00000000..5afebdf4
--- /dev/null
+++ b/orx-shapes/src/demo/kotlin/DemoBezierPatches01.kt
@@ -0,0 +1,44 @@
+import org.openrndr.application
+import org.openrndr.color.ColorRGBa
+import org.openrndr.extensions.SingleScreenshot
+import org.openrndr.extra.shapes.bezierPatch
+import org.openrndr.shape.Circle
+import org.openrndr.shape.ShapeContour
+import org.openrndr.extra.shapes.drawers.bezierPatch
+import org.openrndr.extra.shapes.drawers.bezierPatches
+
+/**
+ * Shows how to create a [bezierPatch] out of a
+ * closed [ShapeContour] with 4 curved segments.
+ *
+ * Calling [Circle.contour] is one way of producing
+ * such a contour with vertices at the cardinal points
+ * but one can manually create any other 4-segment closed contour
+ * to use in bezier patches.
+ */
+suspend fun main() {
+    application {
+        configure {
+            width = 800
+            height = 800
+        }
+        program {
+            if (System.getProperty("takeScreenshot") == "true") {
+                extend(SingleScreenshot()) {
+                    this.outputFile = System.getProperty("screenshotPath")
+                }
+            }
+
+            val c0 = Circle(width / 3.0, height / 2.0, 150.0).contour
+            val bp0 = bezierPatch(c0)
+
+            val c1 = Circle(2.0*width / 3.0, height / 2.0, 150.0).contour
+            val bp1 = bezierPatch(c1)
+
+
+            extend {
+                drawer.bezierPatches(listOf(bp0, bp1))
+            }
+        }
+    }
+}
\ No newline at end of file