vertex displacement

pure javascript

by jmchen

HTML

<div id="info">Icosahedron + Perlin noise</div>
<script src="http://cdnjs.cloudflare.com/ajax/libs/three.js/r70/three.min.js"></script>
<script src="https://dl.dropboxusercontent.com/u/3587259/Code/Threejs/OrbitControls.js">
    
</script>
<script src="http://jyunming-chen.github.io/tutsplus/js/KeyboardState.js"></script>
<script src="http://jyunming-chen.github.io/touch-three/perlin-noise-classical.js"></script>

CSS

#info {
    position: absolute;
    top: 0px;
    width: 100%;
    padding: 10px;
    text-align: center;
    color: #ffff00
}
body {
    overflow: hidden;
}

JavaScript

var camera, scene, renderer, geometry, material, mesh, controls;
var keyboard = new KeyboardState();
var perlinNoise;

init();
animate();

function init() {
    scene = new THREE.Scene();

    camera = new THREE.PerspectiveCamera(50, window.innerWidth / window.innerHeight, 1, 1000);
    camera.position.z = 500;
    scene.add(camera);

   // geometry = new THREE.IcosahedronGeometry(50,2);
    geometry = new THREE.BoxGeometry (50,50,50);
    material = new THREE.MeshBasicMaterial({wireframe:true});
    mesh = new THREE.Mesh(geometry, material);
    scene.add(mesh);
   
    renderer = new THREE.WebGLRenderer();
    renderer.setSize(window.innerWidth, window.innerHeight);
    renderer.setClearColor(0x888888);

    controls = new THREE.OrbitControls(camera, renderer.domElement);

    document.body.appendChild(renderer.domElement);
    window.addEventListener('resize', onWindowResize, false);
    
    perlin = new ClassicalNoise();
}

function onWindowResize() {
    camera.aspect = window.innerWidth / window.innerHeight;
    camera.updateProjectionMatrix();
    renderer.setSize(window.innerWidth, window.innerHeight);
}

function meshDeform() {
    console.log ('deforming ...');
    var tmp = new THREE.Vector3();
    var scale;
	var va,vb,vc;
	var i;
    
    var vertexValences = [];
    for (i = 0; i < mesh.geometry.vertices.length; i++)
        vertexValences.push(0);
    
    //alert (':'+vertexValences[0] + vertexValences[1] + vertexValences[2] + vertexValences[3] + 
    //       vertexValences[4] + vertexValences[5] + vertexValences[6] + vertexValences[7] );

    for (i = 0; i < mesh.geometry.faces.length; i++) {
		var face = mesh.geometry.faces[ i ];
        vertexValences[face.a]++;
        vertexValences[face.b]++;
        vertexValences[face.c]++;
    }
	//alert (vertexValences.length);
    //alert (':'+vertexValences[0] + vertexValences[1] + vertexValences[2] + vertexValences[3] + 
      //     vertexValences[4] + vertexValences[5] + vertexValences[6] +...