threeJS-Helper05-DirectionalLightHelper(方向光助手)

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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DirectionalLightHelper助手！

顺便加入了鼠标控制相机的组件OrbitControls，不懂可以先忽略！

效果图：

代码：

<html>

<head>
    <title>Helper05-DirectionalLightHelper(方向光助手)</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, light,helper; //自定义对象变量
        var target = new THREE.Vector3(0, 0, 0);
        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, 150);
            camera.lookAt(target);
            camera.updateProjectionMatrix(); //相机更新
            
            // DirectionalLight( color, intensity )
            light = new THREE.DirectionalLight(0xFFFFFF,2);
            light.position.set(20,20,50);

            // DirectionalLightHelper( light, size, color )
            var helper = new THREE.DirectionalLightHelper(light, 50,0xFFFFFF);
            scene.add(helper);

            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);
            });
            
            // BoxGeometry( width, height, depth, widthSegments, heightSegments, depthSegments )
            geometry = new THREE.BoxGeometry(40, 40, 40); 
            material = new THREE.MeshBasicMaterial({
                color: 0x00ff00,
                wireframe: false
            }); //wireframe默认为false

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


        }


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

</html>

threeJS-Helper05-DirectionalLightHelper(方向光助手)

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