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253 lines
7.0 KiB
253 lines
7.0 KiB
2 years ago
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<!-- Licensed under a BSD license. See license.html for license -->
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
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<title>Three.js - Cameras - Orthographic 2 views</title>
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<style>
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html, body {
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margin: 0;
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height: 100%;
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}
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#c {
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width: 100%;
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height: 100%;
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display: block;
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}
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.split {
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position: absolute;
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left: 0;
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top: 0;
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width: 100%;
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height: 100%;
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display: flex;
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}
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.split>div {
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width: 100%;
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height: 100%;
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}
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</style>
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</head>
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<body>
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<canvas id="c"></canvas>
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<div class="split">
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<div id="view1" tabindex="1"></div>
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<div id="view2" tabindex="2"></div>
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</div>
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</body>
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<!-- Import maps polyfill -->
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<!-- Remove this when import maps will be widely supported -->
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<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
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<script type="importmap">
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{
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"imports": {
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"three": "../../build/three.module.js",
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"three/addons/": "../../examples/jsm/"
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}
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}
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</script>
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<script type="module">
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import * as THREE from 'three';
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import {OrbitControls} from 'three/addons/controls/OrbitControls.js';
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import {GUI} from 'three/addons/libs/lil-gui.module.min.js';
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function main() {
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const canvas = document.querySelector('#c');
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const view1Elem = document.querySelector('#view1');
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const view2Elem = document.querySelector('#view2');
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const renderer = new THREE.WebGLRenderer({canvas});
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const size = 1;
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const near = 5;
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const far = 50;
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const camera = new THREE.OrthographicCamera(-size, size, size, -size, near, far);
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camera.zoom = 0.2;
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camera.position.set(0, 10, 20);
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const cameraHelper = new THREE.CameraHelper(camera);
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class MinMaxGUIHelper {
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constructor(obj, minProp, maxProp, minDif) {
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this.obj = obj;
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this.minProp = minProp;
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this.maxProp = maxProp;
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this.minDif = minDif;
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}
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get min() {
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return this.obj[this.minProp];
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}
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set min(v) {
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this.obj[this.minProp] = v;
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this.obj[this.maxProp] = Math.max(this.obj[this.maxProp], v + this.minDif);
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}
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get max() {
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return this.obj[this.maxProp];
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}
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set max(v) {
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this.obj[this.maxProp] = v;
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this.min = this.min; // this will call the min setter
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}
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}
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const gui = new GUI();
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gui.add(camera, 'zoom', 0.01, 1, 0.01).listen();
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const minMaxGUIHelper = new MinMaxGUIHelper(camera, 'near', 'far', 0.1);
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gui.add(minMaxGUIHelper, 'min', 0.1, 50, 0.1).name('near');
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gui.add(minMaxGUIHelper, 'max', 0.1, 50, 0.1).name('far');
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const controls = new OrbitControls(camera, view1Elem);
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controls.target.set(0, 5, 0);
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controls.update();
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const camera2 = new THREE.PerspectiveCamera(
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60, // fov
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2, // aspect
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0.1, // near
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500, // far
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);
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camera2.position.set(16, 28, 40);
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camera2.lookAt(0, 5, 0);
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const controls2 = new OrbitControls(camera2, view2Elem);
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controls2.target.set(0, 5, 0);
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controls2.update();
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const scene = new THREE.Scene();
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scene.background = new THREE.Color('black');
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scene.add(cameraHelper);
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{
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const planeSize = 40;
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const loader = new THREE.TextureLoader();
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const texture = loader.load('resources/images/checker.png');
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texture.wrapS = THREE.RepeatWrapping;
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texture.wrapT = THREE.RepeatWrapping;
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texture.magFilter = THREE.NearestFilter;
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const repeats = planeSize / 2;
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texture.repeat.set(repeats, repeats);
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const planeGeo = new THREE.PlaneGeometry(planeSize, planeSize);
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const planeMat = new THREE.MeshPhongMaterial({
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map: texture,
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side: THREE.DoubleSide,
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});
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const mesh = new THREE.Mesh(planeGeo, planeMat);
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mesh.rotation.x = Math.PI * -.5;
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scene.add(mesh);
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}
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{
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const cubeSize = 4;
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const cubeGeo = new THREE.BoxGeometry(cubeSize, cubeSize, cubeSize);
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const cubeMat = new THREE.MeshPhongMaterial({color: '#8AC'});
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const mesh = new THREE.Mesh(cubeGeo, cubeMat);
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mesh.position.set(cubeSize + 1, cubeSize / 2, 0);
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scene.add(mesh);
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}
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{
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const sphereRadius = 3;
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const sphereWidthDivisions = 32;
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const sphereHeightDivisions = 16;
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const sphereGeo = new THREE.SphereGeometry(sphereRadius, sphereWidthDivisions, sphereHeightDivisions);
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const sphereMat = new THREE.MeshPhongMaterial({color: '#CA8'});
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const mesh = new THREE.Mesh(sphereGeo, sphereMat);
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mesh.position.set(-sphereRadius - 1, sphereRadius + 2, 0);
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scene.add(mesh);
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}
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{
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const color = 0xFFFFFF;
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const intensity = 1;
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const light = new THREE.DirectionalLight(color, intensity);
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light.position.set(0, 10, 0);
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light.target.position.set(-5, 0, 0);
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scene.add(light);
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scene.add(light.target);
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}
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function resizeRendererToDisplaySize(renderer) {
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const canvas = renderer.domElement;
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const width = canvas.clientWidth;
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const height = canvas.clientHeight;
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const needResize = canvas.width !== width || canvas.height !== height;
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if (needResize) {
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renderer.setSize(width, height, false);
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}
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return needResize;
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}
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function setScissorForElement(elem) {
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const canvasRect = canvas.getBoundingClientRect();
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const elemRect = elem.getBoundingClientRect();
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// compute a canvas relative rectangle
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const right = Math.min(elemRect.right, canvasRect.right) - canvasRect.left;
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const left = Math.max(0, elemRect.left - canvasRect.left);
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const bottom = Math.min(elemRect.bottom, canvasRect.bottom) - canvasRect.top;
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const top = Math.max(0, elemRect.top - canvasRect.top);
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const width = Math.min(canvasRect.width, right - left);
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const height = Math.min(canvasRect.height, bottom - top);
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// setup the scissor to only render to that part of the canvas
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const positiveYUpBottom = canvasRect.height - bottom;
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renderer.setScissor(left, positiveYUpBottom, width, height);
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renderer.setViewport(left, positiveYUpBottom, width, height);
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// return the aspect
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return width / height;
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}
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function render() {
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resizeRendererToDisplaySize(renderer);
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// turn on the scissor
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renderer.setScissorTest(true);
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// render the original view
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{
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const aspect = setScissorForElement(view1Elem);
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// update the camera for this aspect
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camera.left = -aspect;
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camera.right = aspect;
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camera.updateProjectionMatrix();
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cameraHelper.update();
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// don't draw the camera helper in the original view
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cameraHelper.visible = false;
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scene.background.set(0x000000);
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renderer.render(scene, camera);
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}
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// render from the 2nd camera
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{
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const aspect = setScissorForElement(view2Elem);
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// update the camera for this aspect
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camera2.aspect = aspect;
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camera2.updateProjectionMatrix();
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// draw the camera helper in the 2nd view
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cameraHelper.visible = true;
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scene.background.set(0x000040);
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renderer.render(scene, camera2);
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}
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requestAnimationFrame(render);
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}
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requestAnimationFrame(render);
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}
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main();
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</script>
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</html>
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