webGL/SphereGeometry.html at master · minglinlu/webGL · GitHub

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<!DOCTYPE html>
<html>
<head>
	<!-- 移动相机的位置-->
	<meta charset="UTF-8">
	<title>webgl SphereGeometry</title>
	<script src="js/three.js"></script>
	<script src="js/OrbitControls.js"></script>
	<script src="js/Stats.js"></script>

	<style type="text/css">
		div#canvas-frame {
			border: none;
			cursor: pointer;
			width: 100%;
			height: 666px;
			background-color: #EEEEEE;
		}

	</style>
	<script>
		/*
		 * 围绕某个 x,y,z轴测试
		 */


		var renderer;
		var stats;
		function initThree() {
			width = document.getElementById('canvas-frame').clientWidth;
			height = document.getElementById('canvas-frame').clientHeight;
			renderer = new THREE.WebGLRenderer({
				antialias : true
			});
			renderer.setSize(width, height);
			document.getElementById('canvas-frame').appendChild(renderer.domElement);
			renderer.setClearColor(0xFFFFFF, 1.0);

			stats = new Stats();
			stats.domElement.style.position = 'absolute';
			stats.domElement.style.left = '0px';
			stats.domElement.style.top = '0px';
			document.getElementById('canvas-frame').appendChild(stats.domElement);
		}

		var camera;
		function initCamera() {
			camera = new THREE.PerspectiveCamera(45, width / height, 1, 10000);
			camera.position.x = 100;
			camera.position.y = 300;
			camera.position.z = 600;
			camera.up.x = 0;
			camera.up.y = 1;
			camera.up.z = 0;
			camera.lookAt({
				x : 100,
				y : 0,
				z : 100
			});
		}

		var controls;
		function initControls() {
			var controls = new THREE.OrbitControls(camera, renderer.domElement);

			controls.addEventListener('change', render);

			//旋转的中心点
			controls.target.set(0,0,0);

			controls.update();


			function render() {

				renderer.render(scene, camera);

			}
		}

		var scene;
		function initScene() {
			scene = new THREE.Scene();
			scene.add(camera);
		}

		var light;
		function initLight() {
			light = new THREE.AmbientLight(0xFFFFFF);
			light.position.set(400, 300, 500);
			scene.add(light);
		}

		var cube;
		var mesh;
		function initObject() {

			var geometry = new THREE.SphereGeometry( 100 );

			for ( var i = 0; i < geometry.faces.length; i += 2 ) {

				var hex = Math.random() * 0xFFFFFF;
				geometry.faces[ i ].color.setHex( hex );
				geometry.faces[ i + 1 ].color.setHex( hex );

			}

			var material = new THREE.MeshBasicMaterial( { vertexColors: THREE.FaceColors} );
			mesh = new THREE.Mesh( geometry,material);
			mesh.position = new THREE.Vector3(0,0,0);
			scene.add(mesh);


		}

		function initGrid(){
			var helper = new THREE.GridHelper( 1000, 50 );
			helper.setColors( 0xFF0000, 0x808080 );
			scene.add( helper );
		}

		function threeStart() {
			initThree();
			initCamera();
			initControls();
			initScene();
			initLight();
			initObject();
			initGrid();
			animation();

		}

		// 帧循环、游戏循环
		function animation()
		{
			//mesh.rotation.y +=0.01;
			//mesh.rotation.x +=0.01;
			mesh.rotateY(-0.01);
			mesh.rotateX(0.01);
			mesh.rotateZ(-0.01);

			requestAnimationFrame(animation);
			renderer.render(scene, camera);
			stats.update();

		}

	</script>
</head>

<body onload="threeStart();">
<div id="canvas-frame"></div>
</body>
</html>