tetrahedron

src/mol-geo/primitive/tetrahedron.ts

@@ -0,0 +1,36 @@
+/**
+ * Copyright (c) 2019 mol* contributors, licensed under MIT, See LICENSE file for more info.
+ *
+ * @author Alexander Rose <alexander.rose@weirdbyte.de>
+ */
+
+import { createPrimitive, Primitive } from './primitive';
+import { createCage, Cage } from './cage';
+
+export const tetrahedronVertices: ReadonlyArray<number> = [
+    0.7071, 0, 0,  -0.3535, 0.6123, 0,  -0.3535, -0.6123, 0,
+    0, 0, 0.7071,  0, 0, -0.7071
+
+];
+
+export const tetrahedronIndices: ReadonlyArray<number> = [
+    4, 1, 0,  4, 2, 1,  4, 0, 2,
+    0, 1, 3,  1, 2, 3,  2, 0, 3,
+];
+
+const tetrahedronEdges: ReadonlyArray<number> = [
+    0, 1,  1, 2,  2, 0,
+    0, 3,  1, 3,  2, 3,
+    0, 4,  1, 4,  2, 4,
+]
+
+let tetrahedron: Primitive
+export function Tetrahedron(): Primitive {
+    if (!tetrahedron) tetrahedron = createPrimitive(tetrahedronVertices, tetrahedronIndices)
+    return tetrahedron
+}
+
+const tetrahedronCage = createCage(tetrahedronVertices, tetrahedronEdges)
+export function TetrahedronCage(): Cage {
+    return tetrahedronCage
+}