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threeJS-Helper04-CameraHelper(相機助手)

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本章節學習的內容可以從的官方文件中找到

涉及的知識點博主已經從three原始碼庫裡面摘要出來放在對應的註釋裡面

今天學習Helper裡面的CameraHelper助手!

順便加入了滑鼠控制相機的元件OrbitControls,不懂可以先忽略!

效果圖:

程式碼:

<html>

<head>
    <title>Helper04-CameraHelper</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; //常用變數
        var cube,helper; //自定義物件變數
        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);
            
            //相機助手
            helper = new THREE.CameraHelper(camera);
            scene.add(helper);

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

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

            geometry = new THREE.BoxGeometry(1, 1, 2); //寬,高,深
            material = new THREE.MeshBasicMaterial({
                color: 0x00ff00,
                wireframe: false
            }); //wireframe預設為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>