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148 lines
3.9 KiB
148 lines
3.9 KiB
3 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 Canvas Top Left Origin</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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</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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}
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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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function main() {
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const canvas = document.querySelector('#c');
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const renderer = new THREE.WebGLRenderer({canvas});
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const left = 0;
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const right = 300; // default canvas size
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const top = 0;
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const bottom = 150; // defautl canvas size
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const near = -1;
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const far = 1;
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const camera = new THREE.OrthographicCamera(left, right, top, bottom, near, far);
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camera.zoom = 1;
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const scene = new THREE.Scene();
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scene.background = new THREE.Color('black');
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const loader = new THREE.TextureLoader();
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const textures = [
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loader.load('resources/images/flower-1.jpg'),
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loader.load('resources/images/flower-2.jpg'),
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loader.load('resources/images/flower-3.jpg'),
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loader.load('resources/images/flower-4.jpg'),
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loader.load('resources/images/flower-5.jpg'),
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loader.load('resources/images/flower-6.jpg'),
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];
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const planeSize = 256;
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const planeGeo = new THREE.PlaneGeometry(planeSize, planeSize);
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const planes = textures.map((texture) => {
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const planePivot = new THREE.Object3D();
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scene.add(planePivot);
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texture.magFilter = THREE.NearestFilter;
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const planeMat = new THREE.MeshBasicMaterial({
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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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planePivot.add(mesh);
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// move plane so top left corner is origin
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mesh.position.set(planeSize / 2, planeSize / 2, 0);
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return planePivot;
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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 render(time) {
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time *= 0.001; // convert to seconds;
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if (resizeRendererToDisplaySize(renderer)) {
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camera.right = canvas.width;
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camera.bottom = canvas.height;
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camera.updateProjectionMatrix();
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}
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const distAcross = Math.max(20, canvas.width - planeSize);
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const distDown = Math.max(20, canvas.height - planeSize);
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// total distance to move across and back
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const xRange = distAcross * 2;
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const yRange = distDown * 2;
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const speed = 180;
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planes.forEach((plane, ndx) => {
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// compute a unique time for each plane
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const t = time * speed + ndx * 300;
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// get a value between 0 and range
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const xt = t % xRange;
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const yt = t % yRange;
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// set our position going forward if 0 to half of range
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// and backward if half of range to range
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const x = xt < distAcross ? xt : xRange - xt;
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const y = yt < distDown ? yt : yRange - yt;
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plane.position.set(x, y, 0);
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});
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renderer.render(scene, camera);
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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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