js代码部分
<script src="./../js/three.js"></script>
<script src="./../js/OrbitControls.js"></script>
<script>
var SEPARATION = 200,
AMOUNTX = 60,
AMOUNTY = 60;
var container, stats;
var camera, scene, renderer, controls;
var particles, particle, count = 0;
var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;
// var raycaster = new THREE.Raycaster();
var mouse = new THREE.Vector2();
function init() {
container = document.createElement('div');
document.body.appendChild(container);
camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 1, 10000);
scene = new THREE.Scene();
/**
* 设置光源
* */
//点光源
var point = new THREE.PointLight(0xffffff); //白光
point.position.set(1200, 1200, 1200); //点光源位置
scene.add(point); //点光源添加进场景
//环境光
var ambient = new THREE.AmbientLight(0x999999); //白光
scene.add(ambient); //环境光添加进场景
//粒子
particles = new Array();
var PI2 = Math.PI * 2;
var material = new THREE.SpriteMaterial({
color: 0xffffff,
program: function (context) {
context.beginPath();
context.arc(0, 0, 0.5, 0, PI2, true);
context.fill();
}
});
var i = 0;
for (var ix = 0; ix < AMOUNTX; ix++) {
for (var iy = 0; iy < AMOUNTY; iy++) {
particle = particles[i++] = new THREE.Sprite(material);
particle.position.x = ix * SEPARATION - ((AMOUNTX * SEPARATION) / 2);
particle.position.z = iy * SEPARATION - ((AMOUNTY * SEPARATION) / 2);
scene.add(particle);
}
}
/**
* 创建渲染器对象
* */
renderer = new THREE.WebGLRenderer();
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(window.innerWidth, window.innerHeight);
container.appendChild(renderer.domElement);
window.addEventListener('resize', onWindowResize, false);
//交互控制器
/**
* 鼠标键盘事件监听器
* */
controls = new THREE.OrbitControls(camera, renderer.domElement);
controls.enableDamping = true;
controls.dampingFactor = 0.1;
controls.screenSpacePanning = true;
controls.minDistance = 0;
controls.maxDistance = 5000;
controls.maxPolarAngle = 2 * Math.PI;
/**
* 模型拾取
* */
mouse.x = -10000;
mouse.y = -10000;
function onMouseMove(event) {
// calculate mouse position in normalized device coordinates
// (-1 to +1) for both components
mouse.x = (event.clientX / window.innerWidth) * 2 - 1;
mouse.y = -(event.clientY / window.innerHeight) * 2 + 1;
}
window.addEventListener('mousemove', onMouseMove, false);
}
function onWindowResize() {
windowHalfX = window.innerWidth / 2;
windowHalfY = window.innerHeight / 2;
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
}
var rad = 0;
function render() {
camera.position.set(2600, 500, 2600);
camera.up = new THREE.Vector3(0, 1, 0);
camera.lookAt(new THREE.Vector3(0, 500, 0));
var i = 0;
for (var ix = 0; ix < AMOUNTX; ix++) {
for (var iy = 0; iy < AMOUNTY; iy++) {
particle = particles[i++];
particle.position.y = (Math.sin((ix + count) * 0.2) * 500) +
(Math.sin((iy + count) * 0.2) * 500);
particle.scale.y = (Math.sin((ix + count) * 0.3) + 1) * 3 +
(Math.sin((iy + count) * 0.3) + 1) * 3;
particle.scale.x = (Math.sin((ix + count) * 0.3) + 1) * 3 +
(Math.sin((iy + count) * 0.3) + 1) * 3;
}
scene.children[2].translateY(Math.cos(ix + count / 2) * 5);
}
//模型旋转
scene.children[2].rotateY(Math.PI / 180);
camera.position.x = 2600 * Math.cos(Math.PI / 180 * rad);
camera.position.z = -2600 * Math.sin(Math.PI / 180 * rad);
//点光源位置
scene.children[0].position.x = 1200 * Math.cos(Math.PI / 180 * rad + Math.PI * 0.1);
scene.children[0].position.z = -1200 * Math.sin(Math.PI / 180 * rad + Math.PI * 0.1);
controls.update();
renderer.render(scene, camera);
count += 0.1;
rad += 0.2;
}
function animate() {
requestAnimationFrame(animate);
render();
}
init();
animate();
</script>
