Question

我是一个新的three.js男人，下面是我的代码片段...... 在three.js文档中说MeshDepthMaterial是按深度绘制几何。深度基于相机近远平面。白色最近，黑色最远。但在我的情况下，对于three.js r88没有任何影响，但是对于67. 67.有人可以告诉我为什么？非常感谢...

＆＃13;

<!DOCTYPE html>
<html>
<head>
    <title>示例 04.02 - MeshDepthMaterial</title>
	<script src="../build/three.js"></script>
	<script src="../build/js/controls/OrbitControls.js"></script>
	<script src="../build/js/libs/stats.min.js"></script>
	<script src="../build/js/libs/dat.gui.min.js"></script>
	<script src="../build/js/renderers/CanvasRenderer.js"></script>
	<script src="../build/js/renderers/Projector.js"></script>
	<script src="../jquery/jquery-3.2.1.min.js"></script>
    <style>
        body {
            /* 设置 margin 为 0，并且 overflow 为 hidden，来完成页面样式 */
            margin: 0;
            overflow: hidden;
        }
		/* 统计对象的样式 */
		#Stats-output {
			position: absolute;
			left: 0px;
			top: 0px;
		}
    </style>
</head>
<body>

<!-- 用于 WebGL 输出的 Div -->
<div id="webgl-output"></div>
<!-- 用于统计 FPS 输出的 Div -->
<div id="stats-output"></div>

<!-- 运行 Three.js 示例的 Javascript 代码 -->
<script type="text/javascript">

	var scene;
	var camera;
	var render;
	var webglRender;
	var canvasRender;
	var controls;
	var stats;
	var guiParams;
	
	var ground;
	var cube;
	var plane;
	var sphere;
	
	var meshMaterial;
	
	var ambientLight;
	var spotLight;

    $(function() {
		stats = initStats();
		scene = new THREE.Scene();
		scene.overrideMaterial = new THREE.MeshDepthMaterial({
			morphTargets: true
		});
		
		webglRender = new THREE.WebGLRenderer( {antialias: true, alpha: true, logarithmicDepthBuffer: true} ); // antialias 抗锯齿
		webglRender.setSize(window.innerWidth, window.innerHeight);
		webglRender.setClearColor(0x000000, 1.0);
		webglRender.shadowMap.enabled = true; // 允许阴影投射
		render = webglRender;
		
		camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000); // 2147483647
		camera.position.set(-50, 40, 50);
		
		var target = new THREE.Vector3(0, 0 , 0);
		controls = new THREE.OrbitControls(camera, render.domElement);
		controls.target = target;
		camera.lookAt(target);
		
		$('#webgl-output')[0].appendChild(render.domElement);
		window.addEventListener('resize', onWindowResize, false);
		
		ambientLight = new THREE.AmbientLight(0x000000);
		scene.add(ambientLight);
		
		/** 用来保存那些需要修改的变量 */
		guiParams = new function() {
			this.rotationSpeed = 0.02;
			this.near = 2;
			this.far = 50;
			
			this.addCube = function() {
				for (var i=0; i<100; i++) {
					// 定义 cube 几何
					var cubeGeometry = new THREE.BoxGeometry(5, 5, 5);
					// 定义网格材质
					meshMaterial = new THREE.MeshLambertMaterial({color: Math.random() * 0xffffff});
					// 定义 cube 网格
					cube = new THREE.Mesh(cubeGeometry, meshMaterial);
					cube.castShadow = true;
					cube.position.x = -60 + Math.round((Math.random() * 100));
					cube.position.y = Math.round((Math.random() * 10));
					cube.position.z = -100 + Math.round((Math.random() * 150));
					// 默认加入 cube
					scene.add(cube);
				}
			};
		}
		/** 定义 dat.GUI 对象，并绑定 guiParams 的几个属性 */
		var gui = new dat.GUI();
		gui.add(guiParams, 'addCube');
		gui.add(guiParams, 'near', 0, 50).onChange(function(e) {
			camera.near = e;
		});
		gui.add(guiParams, 'far', 5, 200).onChange(function(e) {
			camera.far = e;
		});
		
		guiParams.addCube();
		
		renderScene();
    });
	
	/** 渲染场景 */
	function renderScene() {
		stats.update();
		rotateMesh(); // 旋转物体
		
		requestAnimationFrame(renderScene);
		render.render(scene, camera);
	}
	
	/** 初始化 stats 统计对象 */
	function initStats() {
		stats = new Stats();
		stats.setMode(0); // 0 为监测 FPS；1 为监测渲染时间
		$('#stats-output').append(stats.domElement);
		return stats;
	}
	
	/** 当浏览器窗口大小变化时触发 */
	function onWindowResize() {
		camera.aspect = window.innerWidth / window.innerHeight;
		camera.updateProjectionMatrix();
		render.setSize(window.innerWidth, window.innerHeight);
	}
	
	/** 旋转物体 */
	function rotateMesh() {
		scene.traverse(function(mesh) {
			if (mesh instanceof THREE.Mesh) {
				mesh.rotation.x += guiParams.rotationSpeed;
				mesh.rotation.y += guiParams.rotationSpeed;
				mesh.rotation.z += guiParams.rotationSpeed;
			}
		});
	}

</script>
</body>
</html>

＆＃13;

Answer 1

当您更改camera.near或camera.far时，您需要致电：

camera.updateProjectionMatrix();

three.js r.88

three.js r88 meshdepthmaterial没有效果

1 个答案: