<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Camera Type</title>
<script src="../../three-part/threejs/three.js"></script>
<script src="../../three-part/utils/stats.min.js"></script>
<script src="../../three-part/utils/dat.gui.min.js"></script>
<script src="../controls/TrackballControls.js"></script>
<script src="../util/util.js"></script>
<style>
body {
margin: 0;
overflow: hidden;
}
</style>
</head>
<body>
<div id="container"></div>
<script type="text/javascript">
init();
function init() {
// show FPS
let stats = initStats();
// resize
window.addEventListener('resize', onResize, false);
let scene = new THREE.Scene();
let camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000);
camera.position.x = 120;
camera.position.y = 60;
camera.position.z = 180;
let renderer = new THREE.WebGLRenderer();
renderer.setClearColor(new THREE.Color(0x000000));
renderer.setSize(window.innerWidth, window.innerHeight);
document.getElementById("container").appendChild(renderer.domElement);
// init trackball control
let trackballControls = initTrackballControls(camera, renderer);
let clock = new THREE.Clock();
// create a plane
let planeGeometry = new THREE.PlaneGeometry(180, 180);
let planeMaterial = new THREE.MeshLambertMaterial({color: 0xffffff});
let plane = new THREE.Mesh(planeGeometry, planeMaterial);
plane.rotation.x = -0.5 * Math.PI;
scene.add(plane);
let cubeGeometry = new THREE.BoxGeometry(4, 4, 4);
for (let j = 0; j < (planeGeometry.parameters.height / 5); j++) {
for (let i = 0; i < planeGeometry.parameters.width / 5; i++) {
let rnd = Math.random() * 0.75 + 0.25;
let cubeMaterial = new THREE.MeshLambertMaterial();
cubeMaterial.color = new THREE.Color(rnd, 0, 0);
let cube = new THREE.Mesh(cubeGeometry, cubeMaterial);
cube.position.z = -((planeGeometry.parameters.height) / 2) + 2 + (j * 5);
cube.position.x = -((planeGeometry.parameters.width) / 2) + 2 + (i * 5);
cube.position.y = 2;
scene.add(cube);
}
}
// add directional light
let directionalLight = new THREE.DirectionalLight(0xffffff, 0.7);
directionalLight.position.set(-20, 40, 60);
scene.add(directionalLight);
// add ambient light
let ambientLight = new THREE.AmbientLight(0x292929);
scene.add(ambientLight);
// attributes which can be modified in GUI
const controls = {
"currentCameraType" : "perspective",
"switchCamera" : function(){
if (camera instanceof THREE.PerspectiveCamera) {
camera = new THREE.OrthographicCamera(window.innerWidth / -16, window.innerWidth / 16, window.innerHeight / 16, window.innerHeight / -16, -200, 500);
camera.position.x = 120;
camera.position.y = 60;
camera.position.z = 180;
camera.lookAt(scene.position);
trackballControls = initTrackballControls(camera, renderer);
this.currentCameraType = "Orthographic";
} else {
camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000);
camera.position.x = 120;
camera.position.y = 60;
camera.position.z = 180;
camera.lookAt(scene.position);
trackballControls = initTrackballControls(camera, renderer);
this.currentCameraType = "Perspective";
}
}
};
// init GUI
initGUI();
renderScene();
function initGUI(){
let gui = new dat.GUI();
gui.add(controls, 'switchCamera');
gui.add(controls, 'currentCameraType').listen();
}
function onResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
}
function renderScene(){
trackballControls.update(clock.getDelta());
stats.update();
requestAnimationFrame(renderScene);
renderer.render(scene, camera);
}
}
</script>
</body>
</html>
运行结果：
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透视相机：
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