threeJS-Helper03-BoxHelperAndBox3Helper(包围盒助手)

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本章节学习的内容可以从的官方文档中找到

涉及的知识点博主已经从three源码库里面摘要出来放在对应的注释里面

今天学习Helper里面的BoxHelper、Box3Helper两个助手

顺便加入了鼠标控制相机的组件OrbitControls

效果图：

知识点都写在源码注释里面了！

<html>

<head>
    <title>Helper03-BoxHelperAndBox3Helper</title>
    <style>
        body {
            margin: 0;
        }

        canvas {
            width: 100%;
            height: 100%
        }
    </style>
</head>

<body>
    <script src="../../../build/three.js"></script>
    <script src="../../js/controls/OrbitControls.js"></script>
    <script>
        var camera, scene, renderer, geometry, material, animate, controls; //常用变量
        var cube, sphere, box; //自定义对象变量


        init();
        animate();

        function init() {

            scene = new THREE.Scene();
            scene.background = new THREE.Color(0xcfcfcf);
            camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);
            camera.position.set(0, 0, 5);

            renderer = new THREE.WebGLRenderer();
            renderer.setSize(window.innerWidth, window.innerHeight);
            document.body.appendChild(renderer.domElement);

            //OrbitControls控件操作模块
            controls = new THREE.OrbitControls(camera, renderer.domElement);
            controls.addEventListener('change', function () {
                renderer.render(scene, camera);
            });

            geometry = new THREE.BoxGeometry(1, 1, 2); //宽，高，深
            material = new THREE.MeshBasicMaterial({
                color: 0x00ff00,
                wireframe: false
            }); //wireframe默认为false

            cube = new THREE.Mesh(geometry, material);
            scene.add(cube);

            //外面的盒子
            //SphereGeometry( radius, widthSegments, heightSegments, phiStart, phiLength, thetaStart, thetaLength )
            sphere = new THREE.SphereGeometry(1.5);
            var object = new THREE.Mesh(sphere, new THREE.MeshBasicMaterial(0xff0000));
            box = new THREE.BoxHelper(object, 0xffff00);
            scene.add(box);

            //里面的盒子
            //Box3( min, max )
            var box3 = new THREE.Box3();
            box3.setFromCenterAndSize(new THREE.Vector3(0, 0, 0), new THREE.Vector3(2, 2, 2));
            var helper = new THREE.Box3Helper(box3, 0xffff00);
            scene.add(helper);

        }


        function animate() {
            requestAnimationFrame(animate);
            controls.update();
            box.rotation.y = cube.rotation.x += 0.01;
            renderer.render(scene, camera);
        };
    </script>
</body>

</html>

threeJS-Helper03-BoxHelperAndBox3Helper(包围盒助手)

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