<!DOCTYPE html> <html> <head>
<title></title>
<script src="https://cdn.bootcss.com/three.js/r67/three.js"></script>
<script src="https://cdn.bootcss.com/stats.js/r10/Stats.min.js"></script>
<style>
body {
margin: 0;
overflow: hidden;
}
</style>
</head>
<body> <div id="Stats-output">
</div>
<div id="WebGL-output">
</div>
<script type="text/javascript"> // 初始化
function init() { var stats = initStats(); // 创建一个场景
var scene = new THREE.Scene(); // 创建一个相机
var camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000); // 创建一个渲染器
var renderer = new THREE.WebGLRenderer(); renderer.setClearColor(new THREE.Color(0x000000, 1.0));
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.shadowMapEnabled = true; // 设置相机的坐标
camera.position.x = -30;
camera.position.y = 40;
camera.position.z = 30;
camera.lookAt(scene.position); // 添加自然光
var ambientLight = new THREE.AmbientLight(0x0c0c0c);
scene.add(ambientLight); // 添加聚光灯
var spotLight = new THREE.SpotLight(0xffffff);
spotLight.position.set(-40, 60, -10);
spotLight.castShadow = true;
scene.add(spotLight); // 高斯帕曲线
var points = gosper(4, 60); var lines = new THREE.Geometry();
var colors = [];
var i = 0;
points.forEach(function (e) {
lines.vertices.push(new THREE.Vector3(e.x, e.z, e.y));
colors[i] = new THREE.Color(0xffffff);
colors[i].setHSL(e.x / 100 + 0.5, ( e.y * 20 ) / 300, 0.8);
//根据提供的 HSL 值设置颜色。参数范围从 0 到 1。可以查看 http://en.wikibooks.org/wiki/Color_Models:_RGB,_HSV,_HSL 了解 HSL 如何用于设置颜色。
i++;
}); lines.colors = colors;
var material = new THREE.LineBasicMaterial({
opacity: 1.0,
linewidth: 1,
vertexColors: THREE.VertexColors
}); var line = new THREE.Line(lines, material);
line.position.set(25, -30, -60);
scene.add(line); // 把渲染后的结果放到DOM元素中去
document.getElementById("WebGL-output").appendChild(renderer.domElement); // call the render function
var step = 0;
render(); function render() {
stats.update();
line.rotation.z = step += 0.01; requestAnimationFrame(render);
renderer.render(scene, camera);
} function gosper(a, b) { var turtle = [0, 0, 0];
var points = [];
var count = 0; rg(a, b, turtle); return points; function rt(x) {
turtle[2] += x;
} function lt(x) {
turtle[2] -= x;
} function fd(dist) {
// ctx.beginPath();
points.push({x: turtle[0], y: turtle[1], z: Math.sin(count) * 5});
// ctx.moveTo(turtle[0], turtle[1]); var dir = turtle[2] * (Math.PI / 180);
turtle[0] += Math.cos(dir) * dist;
turtle[1] += Math.sin(dir) * dist; points.push({x: turtle[0], y: turtle[1], z: Math.sin(count) * 5});
// ctx.lineTo(turtle[0], turtle[1]);
// ctx.stroke(); } function rg(st, ln, turtle) { st--;
ln = ln / 2.6457;
if (st > 0) {
// ctx.strokeStyle = '#111';
rg(st, ln, turtle);
rt(60);
gl(st, ln, turtle);
rt(120);
gl(st, ln, turtle);
lt(60);
rg(st, ln, turtle);
lt(120);
rg(st, ln, turtle);
rg(st, ln, turtle);
lt(60);
gl(st, ln, turtle);
rt(60);
}
if (st == 0) {
fd(ln);
rt(60);
fd(ln);
rt(120);
fd(ln);
lt(60);
fd(ln);
lt(120);
fd(ln);
fd(ln);
lt(60);
fd(ln);
rt(60)
}
} function gl(st, ln, turtle) {
st--;
ln = ln / 2.6457;
if (st > 0) {
// ctx.strokeStyle = '#555';
lt(60);
rg(st, ln, turtle);
rt(60);
gl(st, ln, turtle);
gl(st, ln, turtle);
rt(120);
gl(st, ln, turtle);
rt(60);
rg(st, ln, turtle);
lt(120);
rg(st, ln, turtle);
lt(60);
gl(st, ln, turtle);
}
if (st == 0) {
lt(60);
fd(ln);
rt(60);
fd(ln);
fd(ln);
rt(120);
fd(ln);
rt(60);
fd(ln);
lt(120);
fd(ln);
lt(60);
fd(ln);
}
}
} function initStats() { var stats = new Stats(); stats.setMode(0); // 0: fps, 1: ms
stats.domElement.style.position = 'absolute';
stats.domElement.style.left = '0px';
stats.domElement.style.top = '0px'; document.getElementById("Stats-output").appendChild(stats.domElement); return stats;
}
}; window.onload = init; </script>
</body>
</html>