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example47.html
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example47.html
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<!DOCTYPE html>
<html>
<head>
<title>Example 46 - Canvas bumpmap</title>
<style>
body{
margin: 0;
overflow: hidden;
}
#stats { /* Align stats top-left */
position: absolute;
left: 0px;
top: 0px;
}
#canvas {
position: absolute;
bottom: 0;
left: 0;
border: 1px solid black;
}
</style>
</head>
<body>
<canvas id="canvas" width="200" height="200"></canvas>
<!-- JavaScript libraries -->
<script src="http://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/three.js/r67/three.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/stats.js/r11/Stats.min.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/dat-gui/0.5/dat.gui.min.js"></script>
<script src="assets/libs/perlin.js"></script>
<!-- Javascript code that runs our Three.js examples -->
<script>
var $canvas, canvas, ctx2d;
var date = new Date();
var pn = new Perlin('rnd' + date.getTime());
function fillWithPerlin(perlin, ctx2d) {
for (var x = 0; x < 512; x++) {
for (var y = 0; y < 512; y++) {
var base = new THREE.Color(0xffffff);
var value = perlin.noise(x / 10, y / 10, 0);
base.multiplyScalar(value);
ctx2d.fillStyle = "#" + base.getHexString();
ctx2d.fillRect(x, y, 1, 1);
}
}
}
// once everything is loaded, we run our Three.js stuff.
$(function () {
$canvas = $('#canvas');
canvas = $canvas[0];
ctx2d = canvas.getContext('2d');
fillWithPerlin(pn, ctx2d);
var stats = initStats();
// create a scene, that will hold all our elements such as objects, cameras and lights.
var scene = new THREE.Scene();
// create a camera, which defines where we're looking at.
var camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000);
// create a render and set the size
var webGLRenderer = new THREE.WebGLRenderer();
webGLRenderer.setClearColor(0xEEEEEE, 1.0);
webGLRenderer.setSize(window.innerWidth, window.innerHeight);
var cube = createMesh(new THREE.BoxGeometry(12, 12, 12));
cube.position.x = 3;
scene.add(cube);
// position and point the camera to the center of the scene
camera.position.x = 00;
camera.position.y = 12;
camera.position.z = 28;
camera.lookAt(new THREE.Vector3(0, 0, 0));
var ambiLight = new THREE.AmbientLight(0x141414)
scene.add(ambiLight);
var light = new THREE.DirectionalLight();
light.position.set(0, 30, 20);
scene.add(light);
// add the output of the renderer to the html element
$("body").append(webGLRenderer.domElement);
// call the render function
var step = 0;
// setup the control gui
var controls = new function () {
this.bumpScale = cube.material.bumpScale;
this.regenerateMap = function () {
var date = new Date();
pn = new Perlin('rnd' + date.getTime());
fillWithPerlin(pn, ctx2d);
cube.material.bumpMap.needsUpdate = true;
};
this.updateScale = function () {
cube.material.bumpScale = controls.bumpScale;
}
};
var gui = new dat.GUI();
gui.add(controls, "regenerateMap");
gui.add(controls, "bumpScale", -2, 2).onChange(controls.updateScale);
render();
function createMesh(geom) {
var bumpMap = new THREE.Texture(canvas);
geom.computeVertexNormals();
var mat = new THREE.MeshPhongMaterial();
mat.color = new THREE.Color(0x77ff77);
mat.bumpMap = bumpMap;
bumpMap.needsUpdate = true;
// create a multimaterial
var mesh = new THREE.Mesh(geom, mat);
return mesh;
}
function render() {
stats.update();
cube.rotation.y += 0.01;
cube.rotation.x += 0.01;
// render using requestAnimationFrame
requestAnimationFrame(render);
webGLRenderer.render(scene, camera);
}
function initStats() {
stats = new Stats();
stats.setMode(0); // 0: fps, 1: ms
$('body').append(stats.domElement);
return stats;
}
});
</script>
</body>
</html>