20-THREE.JS 混合材质

时间：2023-03-09 22:08:21
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>

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