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<!doctype html>
      body { max-width: 100%; }
      /* feel free to style the canvas any way you want. If you want it to
      use the entire window, set width: 100% and height: 100%. */
      canvas {
          width: 80%;
          height: 500px;
          display: block;
          margin: 10px auto;

  <p>One interpolated color star</p>






                // We always need a scene

var scene = new THREE.Scene();

// ====================================================================

// function to create a Geometry for a three-pointed star with four triangular faces
// size is the radius of the circle that circumscribes the star

var size = 50;

function starGeometry (size) {
  var starGeom = new THREE.Geometry();
  var angle;
  var lens = [size, size/4];
  for (var i = 0; i < 6; i++) {
     angle = i*(Math.PI/3);
     len = lens[i % 2];
     starGeom.vertices.push(new THREE.Vector3(len*Math.cos(angle), len*Math.sin(angle)));
  starGeom.faces.push(new THREE.Face3(0,1,5));
  starGeom.faces.push(new THREE.Face3(1,2,3));
  starGeom.faces.push(new THREE.Face3(3,4,5));
  starGeom.faces.push(new THREE.Face3(1,3,5));
  return starGeom;

// ====================================================================

// vector of colors to use for the 6 vertices of the star geometry
var colors = [new THREE.Color("red"), new THREE.Color("orange"), new THREE.Color("yellow"), 
              new THREE.Color("green"), new THREE.Color("blue"), new THREE.Color("violet")];

// create a star using color interpolation of the triangular faces

var starGeom = starGeometry(size);      // create the initial geometry

starGeom.vertexColors = colors;         // setup vertex colors

TW.computeFaceColors(starGeom);         // setup vertex colors for each face

// create material that uses vertex colors and is double-sided
var starMaterial = new THREE.MeshBasicMaterial( {vertexColors: THREE.VertexColors,
                                                 side: THREE.DoubleSide} );

// create mesh and add to scene
var starMesh = new THREE.Mesh(starGeom, starMaterial);

// ================================================================

var renderer = new THREE.WebGLRenderer();


               {minx: -size, maxx: size,
                miny: -size, maxy: size,
                minz: 5, maxz: 5});