var longitudeBands = 30;
var radius = 2;
var vertexPositionBuffer;
var vertexNormalBuffer;
var vertexTextureCoordBuffer; var vertexIndexBuffer;
var vertexPositionData = [];
var normalData = [];
var textureCoordData = [];
for (var latNumber = 0; latNumber <= latitudeBands; latNumber++) {
var theta = latNumber * Math.PI / latitudeBands;
var sinTheta = Math.sin(theta);
var cosTheta = Math.cos(theta);
for (var longNumber = 0; longNumber <= longitudeBands;
longNumber++) {
var phi = longNumber * 2 * Math.PI / longitudeBands; var sinPhi = Math.sin(phi);
var cosPhi = Math.cos(phi);
var x = cosPhi * sinTheta;
var y = cosTheta;
var z = sinPhi * sinTheta;
var u = 1- (longNumber / longitudeBands);
var v = latNumber / latitudeBands; normalData.push(x);
normalData.push(y);
normalData.push(z);
textureCoordData.push(u);
textureCoordData.push(v); vertexPositionData.push(radius * x); vertexPositionData.push(radius * y); vertexPositionData.push(radius * z);
} }
var indexData = [];
for (var latNumber = 0; latNumber < latitudeBands; latNumber++) {
for (var longNumber = 0; longNumber < longitudeBands; longNumber++)textureCoordData.length / 2; vertexPositionBuffer = gl.createBuffer(); gl.bindBuffer(gl.ARRAY_BUFFER, vertexPositionBuffer); gl.bufferData(gl.ARRAY_BUFFER, new WebGLFloatArray(vertexPositionData), gl.STATIC_DRAW); vertexPositionBuffer.itemSize = 3;
vertexPositionBuffer.numItems = vertexPositionData.length / 3;

vertexIndexBuffer = gl.createBuffer(); gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, vertexIndexBuffer); gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new WebGLUnsignedShortArray(indexData), gl.STREAM_DRAW); vertexIndexBuffer.itemSize = 3;
vertexIndexBuffer.numItems = indexData.length;
var first = (latNumber * (longitudeBands + 1)) + longNumber; var second = first + longitudeBands + 1; indexData.push(first);
indexData.push(second);
indexData.push(first + 1);
indexData.push(second);
indexData.push(second + 1);
indexData.push(first + 1);
} }
vertexNormalBuffer = gl.createBuffer(); gl.bindBuffer(gl.ARRAY_BUFFER, vertexNormalBuffer); gl.bufferData(gl.ARRAY_BUFFER, new WebGLFloatArray(normalData), gl.STATIC_DRAW);
vertexNormalBuffer.itemSize = 3;
vertexNormalBuffer.numItems = normalData.length / 3; vertexTextureCoordBuffer = gl.createBuffer(); gl.bindBuffer(gl.ARRAY_BUFFER, vertexTextureCoordBuffer); gl.bufferData(gl.ARRAY_BUFFER, new WebGLFloatArray(textureCoordData), gl.STATIC_DRAW); vertexTextureCoordBuffer.itemSize = 2; vertexTextureCoordBuffer.numItems =
 textureCoordData.length / 2; vertexPositionBuffer = gl.createBuffer(); gl.bindBuffer(gl.ARRAY_BUFFER, vertexPositionBuffer); gl.bufferData(gl.ARRAY_BUFFER, new WebGLFloatArray(vertexPositionData), gl.STATIC_DRAW); vertexPositionBuffer.itemSize = 3;
vertexPositionBuffer.numItems = vertexPositionData.length / 3; vertexIndexBuffer = gl.createBuffer(); gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, vertexIndexBuffer); gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new WebGLUnsignedShortArray(indexData), gl.STREAM_DRAW); vertexIndexBuffer.itemSize = 3;
vertexIndexBuffer.numItems = indexData.length;