Added box, plane and sphere mesh generators

2018-11-25 16:56:07 +01:00
parent dc343d384c
commit fdf1ac8832
4 changed files with 184 additions and 0 deletions
--- a/orx-mesh-generators/src/main/kotlin/Box.kt
+++ b/orx-mesh-generators/src/main/kotlin/Box.kt
@@ -0,0 +1,61 @@
+package org.openrndr.extras.meshgenerators
+
+import org.openrndr.draw.VertexBuffer
+import org.openrndr.math.Vector3
+
+fun boxMesh(width: Double = 1.0, height: Double = 1.0, depth: Double,
+            widthSegments: Int = 1, heightSegments: Int = 1, depthSegments: Int = 1,
+            invert: Boolean = false): VertexBuffer {
+    val vb = meshVertexBuffer(widthSegments * heightSegments * 6 * 2 +
+            widthSegments * depthSegments * 6 * 2 +
+            heightSegments * depthSegments * 6 * 2)
+    vb.put {
+        generateBox(width, height, depth,
+                widthSegments, heightSegments, depthSegments,
+                invert, bufferWriter(this))
+    }
+    return vb
+}
+
+fun generateBox(width: Double = 1.0, height: Double = 1.0, depth: Double = 1.0,
+                widthSegments: Int = 1, heightSegments: Int = 1, depthSegments: Int = 1,
+                invert: Boolean = false,
+                writer: VertexWriter) {
+
+    val sign = if (invert) -1.0 else 1.0
+    // +x -- ZY
+    generatePlane(Vector3(width / 2.0 * sign, 0.0, 0.0),
+            Vector3.UNIT_Z, Vector3.UNIT_Y, Vector3.UNIT_X,
+            depth, height,
+            depthSegments, heightSegments, writer)
+
+    // -x -- ZY
+    generatePlane(Vector3(-width / 2.0 * sign, 0.0, 0.0),
+            Vector3.UNIT_Z, Vector3.UNIT_Y, -Vector3.UNIT_X,
+            depth, height,
+            depthSegments, heightSegments, writer)
+
+    // +y -- XZ
+    generatePlane(Vector3(0.0, height / 2.0 * sign, 0.0),
+            Vector3.UNIT_X, Vector3.UNIT_Z, Vector3.UNIT_Y,
+            width, depth,
+            widthSegments, depthSegments, writer)
+
+    // -y -- XZ
+    generatePlane(Vector3(0.0, -height / 2.0 * sign, 0.0),
+            Vector3.UNIT_X, Vector3.UNIT_Z, -Vector3.UNIT_Y,
+            width, depth,
+            widthSegments, depthSegments, writer)
+
+    // +z -- XY
+    generatePlane(Vector3(0.0, 0.0, depth / 2.0 * sign),
+            Vector3.UNIT_X, Vector3.UNIT_Y, Vector3.UNIT_Z,
+            width, height,
+            widthSegments, heightSegments, writer)
+
+    // -z -- XY
+    generatePlane(Vector3(0.0, 0.0, -depth / 2.0 * sign),
+            Vector3.UNIT_X, Vector3.UNIT_Y, -Vector3.UNIT_Z,
+            width, height,
+            widthSegments, heightSegments, writer)
+}