refactor geometries and meshes

src/geometries/DodecahedronGeometry.js

@@ -1,15 +1,21 @@
 import { DodecahedronGeometry } from 'three';
 import Geometry from './Geometry.js';
 
-export default {
+export const props = {
-  extends: Geometry,
-  props: {
   radius: { type: Number, default: 1 },
   detail: { type: Number, default: 0 },
-  },
+};
+
+export function createGeometry(comp) {
+  return new DodecahedronGeometry(comp.radius, comp.detail);
+};
+
+export default {
+  extends: Geometry,
+  props,
   methods: {
     createGeometry() {
-      this.geometry = new DodecahedronGeometry(this.radius, this.detail);
+      this.geometry = createGeometry(this);
     },
   },
 };

src/geometries/IcosahedronGeometry.js

@@ -1,15 +1,21 @@
 import { IcosahedronGeometry } from 'three';
 import Geometry from './Geometry.js';
 
-export default {
+export const props = {
-  extends: Geometry,
-  props: {
   radius: { type: Number, default: 1 },
   detail: { type: Number, default: 0 },
-  },
+};
+
+export function createGeometry(comp) {
+  return new IcosahedronGeometry(comp.radius, comp.detail);
+};
+
+export default {
+  extends: Geometry,
+  props,
   methods: {
     createGeometry() {
-      this.geometry = new IcosahedronGeometry(this.radius, this.detail);
+      this.geometry = createGeometry(this);
     },
   },
 };

src/geometries/LatheGeometry.js

@@ -1,17 +1,23 @@
 import { LatheGeometry } from 'three';
 import Geometry from './Geometry.js';
 
-export default {
+export const props = {
-  extends: Geometry,
-  props: {
   points: Array,
   segments: { type: Number, default: 12 },
   phiStart: { type: Number, default: 0 },
   phiLength: { type: Number, default: Math.PI * 2 },
-  },
+};
+
+export function createGeometry(comp) {
+  return new LatheGeometry(comp.points, comp.segments, comp.phiStart, comp.phiLength);
+};
+
+export default {
+  extends: Geometry,
+  props,
   methods: {
     createGeometry() {
-      this.geometry = new LatheGeometry(this.points, this.segments, this.phiStart, this.phiLength);
+      this.geometry = createGeometry(this);
     },
   },
 };

src/geometries/OctahedronGeometry.js

@@ -1,15 +1,21 @@
 import { OctahedronGeometry } from 'three';
 import Geometry from './Geometry.js';
 
-export default {
+export const props = {
-  extends: Geometry,
-  props: {
   radius: { type: Number, default: 1 },
   detail: { type: Number, default: 0 },
-  },
+};
+
+export function createGeometry(comp) {
+  return new OctahedronGeometry(comp.radius, comp.detail);
+};
+
+export default {
+  extends: Geometry,
+  props,
   methods: {
     createGeometry() {
-      this.geometry = new OctahedronGeometry(this.radius, this.detail);
+      this.geometry = createGeometry(this);
     },
   },
 };

src/geometries/PolyhedronGeometry.js

@@ -1,17 +1,23 @@
 import { PolyhedronGeometry } from 'three';
 import Geometry from './Geometry.js';
 
-export default {
+export const props = {
-  extends: Geometry,
-  props: {
   vertices: Array,
   indices: Array,
   radius: { type: Number, default: 1 },
   detail: { type: Number, default: 0 },
-  },
+};
+
+export function createGeometry(comp) {
+  return new PolyhedronGeometry(comp.vertices, comp.indices, comp.radius, comp.detail);
+};
+
+export default {
+  extends: Geometry,
+  props,
   methods: {
     createGeometry() {
-      this.geometry = new PolyhedronGeometry(this.vertices, this.indices, this.radius, this.detail);
+      this.geometry = createGeometry(this);
     },
   },
 };

src/geometries/RingGeometry.js

@@ -1,19 +1,25 @@
 import { RingGeometry } from 'three';
 import Geometry from './Geometry.js';
 
-export default {
+export const props = {
-  extends: Geometry,
-  props: {
   innerRadius: { type: Number, default: 0.5 },
   outerRadius: { type: Number, default: 1 },
   thetaSegments: { type: Number, default: 8 },
   phiSegments: { type: Number, default: 1 },
   thetaStart: { type: Number, default: 0 },
   thetaLength: { type: Number, default: Math.PI * 2 },
-  },
+};
+
+export function createGeometry(comp) {
+  return new RingGeometry(comp.innerRadius, comp.outerRadius, comp.thetaSegments, comp.phiSegments, comp.thetaStart, comp.thetaLength);
+};
+
+export default {
+  extends: Geometry,
+  props,
   methods: {
     createGeometry() {
-      this.geometry = new RingGeometry(this.innerRadius, this.outerRadius, this.thetaSegments, this.phiSegments, this.thetaStart, this.thetaLength);
+      this.geometry = createGeometry(this);
     },
   },
 };

src/geometries/SphereGeometry.js

@@ -1,16 +1,22 @@
 import { SphereGeometry } from 'three';
 import Geometry from './Geometry.js';
 
-export default {
+export const props = {
-  extends: Geometry,
-  props: {
   radius: { type: Number, default: 1 },
   widthSegments: { type: Number, default: 12 },
   heightSegments: { type: Number, default: 12 },
-  },
+};
+
+export function createGeometry(comp) {
+  return new SphereGeometry(comp.radius, comp.widthSegments, comp.heightSegments);
+};
+
+export default {
+  extends: Geometry,
+  props,
   methods: {
     createGeometry() {
-      this.geometry = new SphereGeometry(this.radius, this.widthSegments, this.heightSegments);
+      this.geometry = createGeometry(this);
     },
   },
 };

src/geometries/TetrahedronGeometry.js

@@ -1,15 +1,21 @@
 import { TetrahedronGeometry } from 'three';
 import Geometry from './Geometry.js';
 
-export default {
+export const props = {
-  extends: Geometry,
-  props: {
   radius: { type: Number, default: 1 },
   detail: { type: Number, default: 0 },
-  },
+};
+
+export function createGeometry(comp) {
+  return new TetrahedronGeometry(comp.radius, comp.detail);
+};
+
+export default {
+  extends: Geometry,
+  props,
   methods: {
     createGeometry() {
-      this.geometry = new TetrahedronGeometry(this.radius, this.detail);
+      this.geometry = createGeometry(this);
     },
   },
 };

src/geometries/TorusGeometry.js

@@ -1,18 +1,24 @@
 import { TorusGeometry } from 'three';
 import Geometry from './Geometry.js';
 
-export default {
+export const props = {
-  extends: Geometry,
-  props: {
   radius: { type: Number, default: 1 },
   tube: { type: Number, default: 0.4 },
   radialSegments: { type: Number, default: 8 },
   tubularSegments: { type: Number, default: 6 },
   arc: { type: Number, default: Math.PI * 2 },
-  },
+};
+
+export function createGeometry(comp) {
+  return new TorusGeometry(comp.radius, comp.tube, comp.radialSegments, comp.tubularSegments, comp.arc);
+};
+
+export default {
+  extends: Geometry,
+  props,
   methods: {
     createGeometry() {
-      this.geometry = new TorusGeometry(this.radius, this.tube, this.radialSegments, this.tubularSegments, this.arc);
+      this.geometry = createGeometry(this);
     },
   },
 };

src/geometries/TorusKnotGeometry.js

@@ -1,19 +1,25 @@
 import { TorusKnotGeometry } from 'three';
 import Geometry from './Geometry.js';
 
-export default {
+export const props = {
-  extends: Geometry,
-  props: {
   radius: { type: Number, default: 1 },
   tube: { type: Number, default: 0.4 },
   tubularSegments: { type: Number, default: 64 },
   radialSegments: { type: Number, default: 8 },
   p: { type: Number, default: 2 },
   q: { type: Number, default: 3 },
-  },
+};
+
+export function createGeometry(comp) {
+  return new TorusKnotGeometry(comp.radius, comp.tube, comp.tubularSegments, comp.radialSegments, comp.p, comp.q);
+};
+
+export default {
+  extends: Geometry,
+  props,
   methods: {
     createGeometry() {
-      this.geometry = new TorusKnotGeometry(this.radius, this.tube, this.tubularSegments, this.radialSegments, this.p, this.q);
+      this.geometry = createGeometry(this);
     },
   },
 };

src/geometries/TubeGeometry.js

@@ -1,18 +1,82 @@
-import { Curve, TubeGeometry } from 'three';
+import { CatmullRomCurve3, Curve, TubeGeometry, Vector3 } from 'three';
 import Geometry from './Geometry.js';
 
-export default {
+export const props = {
-  extends: Geometry,
+  points: Array,
-  props: {
   path: Curve,
   tubularSegments: { type: Number, default: 64 },
   radius: { type: Number, default: 1 },
   radiusSegments: { type: Number, default: 8 },
   closed: { type: Boolean, default: false },
-  },
+};
+
+export function createGeometry(comp) {
+  let curve;
+  if (comp.points) {
+    curve = new CatmullRomCurve3(comp.points);
+  } else if (comp.path) {
+    curve = comp.path;
+  } else {
+    console.error('Missing path curve or points.');
+  }
+  return new TubeGeometry(curve, comp.tubularSegments, comp.radius, comp.radiusSegments, comp.closed);
+};
+
+export default {
+  extends: Geometry,
+  props,
   methods: {
     createGeometry() {
-      this.geometry = new TubeGeometry(this.path, this.tubularSegments, this.radius, this.radiusSegments, this.closed);
+      this.geometry = createGeometry(this);
+    },
+    // update points (without using prop, faster)
+    updatePoints(points) {
+      updateTubeGeometryPoints(this.geometry, points);
     },
   },
 };
+
+export function updateTubeGeometryPoints(tube, points) {
+  const curve = new CatmullRomCurve3(points);
+  const { radialSegments, radius, tubularSegments, closed } = tube.parameters;
+  const frames = curve.computeFrenetFrames(tubularSegments, closed);
+  tube.tangents = frames.tangents;
+  tube.normals = frames.normals;
+  tube.binormals = frames.binormals;
+  tube.parameters.path = curve;
+
+  const pArray = tube.attributes.position.array;
+  const nArray = tube.attributes.normal.array;
+  const normal = new Vector3();
+  let P;
+
+  for (let i = 0; i < tubularSegments; i++) {
+    updateSegment(i);
+  }
+  updateSegment(tubularSegments);
+
+  tube.attributes.position.needsUpdate = true;
+  tube.attributes.normal.needsUpdate = true;
+
+  function updateSegment(i) {
+    P = curve.getPointAt(i / tubularSegments, P);
+    const N = frames.normals[i];
+    const B = frames.binormals[i];
+    for (let j = 0; j <= radialSegments; j++) {
+      const v = j / radialSegments * Math.PI * 2;
+      const sin = Math.sin(v);
+      const cos = -Math.cos(v);
+      normal.x = (cos * N.x + sin * B.x);
+      normal.y = (cos * N.y + sin * B.y);
+      normal.z = (cos * N.z + sin * B.z);
+      normal.normalize();
+      const index = (i * (radialSegments + 1) + j) * 3;
+      nArray[index] = normal.x;
+      nArray[index + 1] = normal.y;
+      nArray[index + 2] = normal.z;
+      pArray[index] = P.x + radius * normal.x;
+      pArray[index + 1] = P.y + radius * normal.y;
+      pArray[index + 2] = P.z + radius * normal.z;
+    }
+  }
+}

src/meshes/Dodecahedron.js

@@ -1,26 +1,16 @@
-import { DodecahedronBufferGeometry } from 'three';
-import { watch } from 'vue';
 import Mesh from './Mesh.js';
+import { props, createGeometry } from '../geometries/DodecahedronGeometry.js';
 
 export default {
   extends: Mesh,
-  props: {
+  props,
-    radius: { type: Number, default: 1 },
-    detail: { type: Number, default: 0 },
-  },
   created() {
     this.createGeometry();
-
+    this.addGeometryWatchers(props);
-    const watchProps = ['radius', 'detail'];
-    watchProps.forEach(prop => {
-      watch(() => this[prop], () => {
-        this.refreshGeometry();
-      });
-    });
   },
   methods: {
     createGeometry() {
-      this.geometry = new DodecahedronBufferGeometry(this.radius, this.detail);
+      this.geometry = createGeometry(this);
     },
   },
   __hmrId: 'Dodecahedron',

src/meshes/Icosahedron.js

@@ -1,26 +1,16 @@
-import { IcosahedronBufferGeometry } from 'three';
-import { watch } from 'vue';
 import Mesh from './Mesh.js';
+import { props, createGeometry } from '../geometries/IcosahedronGeometry.js';
 
 export default {
   extends: Mesh,
-  props: {
+  props,
-    radius: { type: Number, default: 1 },
-    detail: { type: Number, default: 0 },
-  },
   created() {
     this.createGeometry();
-
+    this.addGeometryWatchers(props);
-    const watchProps = ['radius', 'detail'];
-    watchProps.forEach(prop => {
-      watch(() => this[prop], () => {
-        this.refreshGeometry();
-      });
-    });
   },
   methods: {
     createGeometry() {
-      this.geometry = new IcosahedronBufferGeometry(this.radius, this.detail);
+      this.geometry = createGeometry(this);
     },
   },
   __hmrId: 'Icosahedron',

src/meshes/Lathe.js

@@ -1,28 +1,16 @@
-import { LatheBufferGeometry } from 'three';
-import { watch } from 'vue';
 import Mesh from './Mesh.js';
+import { props, createGeometry } from '../geometries/LatheGeometry.js';
 
 export default {
   extends: Mesh,
-  props: {
+  props,
-    points: Array,
-    segments: { type: Number, default: 12 },
-    phiStart: { type: Number, default: 0 },
-    phiLength: { type: Number, default: Math.PI * 2 },
-  },
   created() {
     this.createGeometry();
-
+    this.addGeometryWatchers(props);
-    const watchProps = ['points', 'segments', 'phiStart', 'phiLength'];
-    watchProps.forEach(prop => {
-      watch(() => this[prop], () => {
-        this.refreshGeometry();
-      });
-    });
   },
   methods: {
     createGeometry() {
-      this.geometry = new LatheBufferGeometry(this.points, this.segments, this.phiStart, this.phiLength);
+      this.geometry = createGeometry(this);
     },
   },
   __hmrId: 'Lathe',

src/meshes/Octahedron.js

@@ -1,26 +1,16 @@
-import { OctahedronBufferGeometry } from 'three';
-import { watch } from 'vue';
 import Mesh from './Mesh.js';
+import { props, createGeometry } from '../geometries/OctahedronGeometry.js';
 
 export default {
   extends: Mesh,
-  props: {
+  props,
-    radius: { type: Number, default: 1 },
-    detail: { type: Number, default: 0 },
-  },
   created() {
     this.createGeometry();
-
+    this.addGeometryWatchers(props);
-    const watchProps = ['radius', 'detail'];
-    watchProps.forEach(prop => {
-      watch(() => this[prop], () => {
-        this.refreshGeometry();
-      });
-    });
   },
   methods: {
     createGeometry() {
-      this.geometry = new OctahedronBufferGeometry(this.radius, this.detail);
+      this.geometry = createGeometry(this);
     },
   },
   __hmrId: 'Octahedron',

src/meshes/Polyhedron.js

@@ -1,28 +1,16 @@
-import { PolyhedronBufferGeometry } from 'three';
-import { watch } from 'vue';
 import Mesh from './Mesh.js';
+import { props, createGeometry } from '../geometries/PolyhedronGeometry.js';
 
 export default {
   extends: Mesh,
-  props: {
+  props,
-    vertices: Array,
-    indices: Array,
-    radius: { type: Number, default: 1 },
-    detail: { type: Number, default: 0 },
-  },
   created() {
     this.createGeometry();
-
+    this.addGeometryWatchers(props);
-    const watchProps = ['vertices', 'indices', 'radius', 'detail'];
-    watchProps.forEach(prop => {
-      watch(() => this[prop], () => {
-        this.refreshGeometry();
-      });
-    });
   },
   methods: {
     createGeometry() {
-      this.geometry = new PolyhedronBufferGeometry(this.vertices, this.indices, this.radius, this.detail);
+      this.geometry = createGeometry(this);
     },
   },
   __hmrId: 'Polyhedron',

src/meshes/Ring.js

@@ -1,30 +1,16 @@
-import { RingBufferGeometry } from 'three';
-import { watch } from 'vue';
 import Mesh from './Mesh.js';
+import { props, createGeometry } from '../geometries/RingGeometry.js';
 
 export default {
   extends: Mesh,
-  props: {
+  props,
-    innerRadius: { type: Number, default: 0.5 },
-    outerRadius: { type: Number, default: 1 },
-    thetaSegments: { type: Number, default: 8 },
-    phiSegments: { type: Number, default: 1 },
-    thetaStart: { type: Number, default: 0 },
-    thetaLength: { type: Number, default: Math.PI * 2 },
-  },
   created() {
     this.createGeometry();
-
+    this.addGeometryWatchers(props);
-    const watchProps = ['innerRadius', 'outerRadius', 'thetaSegments', 'phiSegments', 'thetaStart', 'thetaLength'];
-    watchProps.forEach(prop => {
-      watch(() => this[prop], () => {
-        this.refreshGeometry();
-      });
-    });
   },
   methods: {
     createGeometry() {
-      this.geometry = new RingBufferGeometry(this.innerRadius, this.outerRadius, this.thetaSegments, this.phiSegments, this.thetaStart, this.thetaLength);
+      this.geometry = createGeometry(this);
     },
   },
   __hmrId: 'Ring',

src/meshes/Sphere.js

@@ -1,24 +1,16 @@
-import { SphereBufferGeometry } from 'three';
 import Mesh from './Mesh.js';
+import { props, createGeometry } from '../geometries/SphereGeometry.js';
 
 export default {
   extends: Mesh,
-  props: {
+  props,
-    radius: Number,
-    widthSegments: { type: Number, default: 12 },
-    heightSegments: { type: Number, default: 12 },
-  },
-  watch: {
-    radius() { this.refreshGeometry(); },
-    widthSegments() { this.refreshGeometry(); },
-    heightSegments() { this.refreshGeometry(); },
-  },
   created() {
     this.createGeometry();
+    this.addGeometryWatchers(props);
   },
   methods: {
     createGeometry() {
-      this.geometry = new SphereBufferGeometry(this.radius, this.widthSegments, this.heightSegments);
+      this.geometry = createGeometry(this);
     },
   },
   __hmrId: 'Sphere',

src/meshes/Tetrahedron.js

@@ -1,26 +1,16 @@
-import { TetrahedronBufferGeometry } from 'three';
-import { watch } from 'vue';
 import Mesh from './Mesh.js';
+import { props, createGeometry } from '../geometries/TetrahedronGeometry.js';
 
 export default {
   extends: Mesh,
-  props: {
+  props,
-    radius: { type: Number, default: 1 },
-    detail: { type: Number, default: 0 },
-  },
   created() {
     this.createGeometry();
-
+    this.addGeometryWatchers(props);
-    const watchProps = ['radius', 'detail'];
-    watchProps.forEach(prop => {
-      watch(() => this[prop], () => {
-        this.refreshGeometry();
-      });
-    });
   },
   methods: {
     createGeometry() {
-      this.geometry = new TetrahedronBufferGeometry(this.radius, this.detail);
+      this.geometry = createGeometry(this);
     },
   },
   __hmrId: 'Tetrahedron',

src/meshes/Torus.js

@@ -1,29 +1,16 @@
-import { TorusBufferGeometry } from 'three';
-import { watch } from 'vue';
 import Mesh from './Mesh.js';
+import { props, createGeometry } from '../geometries/TorusGeometry.js';
 
 export default {
   extends: Mesh,
-  props: {
+  props,
-    radius: { type: Number, default: 0.5 },
-    tube: { type: Number, default: 0.4 },
-    radialSegments: { type: Number, default: 8 },
-    tubularSegments: { type: Number, default: 6 },
-    arc: { type: Number, default: Math.PI * 2 },
-  },
   created() {
     this.createGeometry();
-
+    this.addGeometryWatchers(props);
-    const watchProps = ['radius', 'tube', 'radialSegments', 'tubularSegments', 'arc'];
-    watchProps.forEach(prop => {
-      watch(() => this[prop], () => {
-        this.refreshGeometry();
-      });
-    });
   },
   methods: {
     createGeometry() {
-      this.geometry = new TorusBufferGeometry(this.radius, this.tube, this.radialSegments, this.tubularSegments, this.arc);
+      this.geometry = createGeometry(this);
     },
   },
   __hmrId: 'Torus',

src/meshes/TorusKnot.js

@@ -1,30 +1,16 @@
-import { TorusKnotBufferGeometry } from 'three';
-import { watch } from 'vue';
 import Mesh from './Mesh.js';
+import { props, createGeometry } from '../geometries/TorusKnotGeometry.js';
 
 export default {
   extends: Mesh,
-  props: {
+  props,
-    radius: { type: Number, default: 0.5 },
-    tube: { type: Number, default: 0.4 },
-    tubularSegments: { type: Number, default: 64 },
-    radialSegments: { type: Number, default: 8 },
-    p: { type: Number, default: 2 },
-    q: { type: Number, default: 3 },
-  },
   created() {
     this.createGeometry();
-
+    this.addGeometryWatchers(props);
-    const watchProps = ['radius', 'tube', 'radialSegments', 'tubularSegments', 'p', 'q'];
-    watchProps.forEach(prop => {
-      watch(() => this[prop], () => {
-        this.refreshGeometry();
-      });
-    });
   },
   methods: {
     createGeometry() {
-      this.geometry = new TorusKnotBufferGeometry(this.radius, this.tube, this.tubularSegments, this.radialSegments, this.p, this.q);
+      this.geometry = createGeometry(this);
     },
   },
   __hmrId: 'TorusKnot',

src/meshes/Tube.js

@@ -1,90 +1,21 @@
-import { CatmullRomCurve3, Curve, TubeGeometry, Vector3 } from 'three';
-import { watch } from 'vue';
 import Mesh from './Mesh.js';
+import { props, createGeometry, updateTubeGeometryPoints } from '../geometries/TubeGeometry.js';
 
 export default {
   extends: Mesh,
-  props: {
+  props,
-    path: Curve,
-    points: Array,
-    tubularSegments: { type: Number, default: 64 },
-    radius: { type: Number, default: 1 },
-    radialSegments: { type: Number, default: 8 },
-    closed: { type: Boolean, default: false },
-  },
   created() {
     this.createGeometry();
-    const watchProps = ['tubularSegments', 'radius', 'radialSegments', 'closed'];
+    this.addGeometryWatchers(props);
-    watchProps.forEach(prop => {
-      watch(() => this[prop], (v) => {
-        this.refreshGeometry();
-      });
-    });
-    watch(() => this.points, () => {
-      updateTubeGeometryPoints(this.geometry, this.points);
-    });
   },
   methods: {
     createGeometry() {
-      let curve;
+      this.geometry = createGeometry(this);
-      if (this.points) {
-        curve = new CatmullRomCurve3(this.points);
-      } else if (this.path) {
-        curve = this.path;
-      } else {
-        console.error('Missing path curve or points.');
-      }
-      this.geometry = new TubeGeometry(curve, this.tubularSegments, this.radius, this.radialSegments, this.closed);
     },
     // update curve points (without using prop, faster)
-    updateCurve(points) {
+    updatePoints(points) {
       updateTubeGeometryPoints(this.geometry, points);
     },
   },
   __hmrId: 'Tube',
 };
-
-function updateTubeGeometryPoints(tube, points) {
-  const curve = new CatmullRomCurve3(points);
-  const { radialSegments, radius, tubularSegments, closed } = tube.parameters;
-  const frames = curve.computeFrenetFrames(tubularSegments, closed);
-  tube.tangents = frames.tangents;
-  tube.normals = frames.normals;
-  tube.binormals = frames.binormals;
-  tube.parameters.path = curve;
-
-  const pArray = tube.attributes.position.array;
-  const nArray = tube.attributes.normal.array;
-  const normal = new Vector3();
-  let P;
-
-  for (let i = 0; i < tubularSegments; i++) {
-    updateSegment(i);
-  }
-  updateSegment(tubularSegments);
-
-  tube.attributes.position.needsUpdate = true;
-  tube.attributes.normal.needsUpdate = true;
-
-  function updateSegment(i) {
-    P = curve.getPointAt(i / tubularSegments, P);
-    const N = frames.normals[i];
-    const B = frames.binormals[i];
-    for (let j = 0; j <= radialSegments; j++) {
-      const v = j / radialSegments * Math.PI * 2;
-      const sin = Math.sin(v);
-      const cos = -Math.cos(v);
-      normal.x = (cos * N.x + sin * B.x);
-      normal.y = (cos * N.y + sin * B.y);
-      normal.z = (cos * N.z + sin * B.z);
-      normal.normalize();
-      const index = (i * (radialSegments + 1) + j) * 3;
-      nArray[index] = normal.x;
-      nArray[index + 1] = normal.y;
-      nArray[index + 2] = normal.z;
-      pArray[index] = P.x + radius * normal.x;
-      pArray[index + 1] = P.y + radius * normal.y;
-      pArray[index + 2] = P.z + radius * normal.z;
-    }
-  }
-}