20-THREE.JS 混合材质 

<!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>
    <script type="text/javascript" src="https://cdn.bootcss.com/dat-gui/0.7.3/dat.gui.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, 10, 130);

        // 场景一个渲染器
        var renderer = new THREE.WebGLRenderer();

        renderer.sortObjects = false;

        renderer.setClearColor(new THREE.Color(0x00000, 1.0));
        renderer.setSize(window.innerWidth, window.innerHeight);
        renderer.shadowMapEnabled = true;

        // 设置相机的位置 最远最近距离 朝向
        camera.position.x = -50;
        camera.position.y = 40;
        camera.position.z = 50;
        camera.near = 7;
        camera.far = 139;
        camera.lookAt(scene.position);

        // 把渲染后的效果放到DOM元素中去
        document.getElementById("WebGL-output").appendChild(renderer.domElement);

        
        var step = 0;

        var controls = new function () {
            this.cameraNear = camera.near;
            this.cameraFar = camera.far;
            this.rotationSpeed = 0.02;
            this.numberOfObjects = scene.children.length;
            this.color = 0x00ff00;


            this.removeCube = function () {
                var allChildren = scene.children;
                var lastObject = allChildren[allChildren.length - 1];
                if (lastObject instanceof THREE.Mesh) {
                    scene.remove(lastObject);
                    this.numberOfObjects = scene.children.length;
                }
            };

            this.addCube = function () {

                var cubeSize = Math.ceil(3 + (Math.random() * 3));
                var cubeGeometry = new THREE.BoxGeometry(cubeSize, cubeSize, cubeSize);

                //混合材质
                var cubeMaterial = new THREE.MeshDepthMaterial();
                var colorMaterial = new THREE.MeshBasicMaterial({
                    color: controls.color,
                    transparent: true,
                    blending: THREE.MultiplyBlending
                });
                var cube = new THREE.SceneUtils.createMultiMaterialObject(cubeGeometry, [colorMaterial, cubeMaterial]);
                cube.children[1].scale.set(0.99, 0.99, 0.99);
                cube.castShadow = true;

                // 给正方体随机的位置
                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));

                // 在场景中添加正方体
                scene.add(cube);
                this.numberOfObjects = scene.children.length;
            };

            this.outputObjects = function () {
                console.log(scene.children);
            }
        };

        var gui = new dat.GUI();
        gui.addColor(controls, 'color');
        gui.add(controls, 'rotationSpeed', 0, 0.5);
        gui.add(controls, 'addCube');
        gui.add(controls, 'removeCube');
        gui.add(controls, 'cameraNear', 0, 50).onChange(function (e) {
            camera.near = e;
        });
        gui.add(controls, 'cameraFar', 50, 200).onChange(function (e) {
            camera.far = e;
        });

        var i = 0;
        while (i < 10) {
            controls.addCube();
            i++;
        }

        render();

        function render() {
            stats.update();

            // 旋转所有正方体
            scene.traverse(function (e) {
                if (e instanceof THREE.Mesh) {

                    e.rotation.x += controls.rotationSpeed;
                    e.rotation.y += controls.rotationSpeed;
                    e.rotation.z += controls.rotationSpeed;
                }
            });

            
            requestAnimationFrame(render);
            renderer.render(scene, camera);
        }

        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>

 

posted on 2018-10-31 09:10  -韩帅  阅读(392)  评论(0)    收藏  举报

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