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- <!-- Licensed under a BSD license. See license.html for license -->
- <!DOCTYPE html>
- <html>
- <head>
- <meta charset="utf-8">
- <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
- <title>Three.js - Cameras - Orthographic Canvas Top Left Origin</title>
- <style>
- html, body {
- margin: 0;
- height: 100%;
- }
- #c {
- width: 100%;
- height: 100%;
- display: block;
- }
- .split {
- position: absolute;
- left: 0;
- top: 0;
- width: 100%;
- height: 100%;
- display: flex;
- }
- .split>div {
- width: 100%;
- height: 100%;
- }
- </style>
- </head>
- <body>
- <canvas id="c"></canvas>
- </body>
- <script type="importmap">
- {
- "imports": {
- "three": "../../build/three.module.js"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- function main() {
- const canvas = document.querySelector( '#c' );
- const renderer = new THREE.WebGLRenderer( { antialias: true, canvas } );
- const left = 0;
- const right = 300; // default canvas size
- const top = 0;
- const bottom = 150; // defautl canvas size
- const near = - 1;
- const far = 1;
- const camera = new THREE.OrthographicCamera( left, right, top, bottom, near, far );
- camera.zoom = 1;
- const scene = new THREE.Scene();
- scene.background = new THREE.Color( 'black' );
- const loader = new THREE.TextureLoader();
- const textures = [
- loader.load( 'resources/images/flower-1.jpg' ),
- loader.load( 'resources/images/flower-2.jpg' ),
- loader.load( 'resources/images/flower-3.jpg' ),
- loader.load( 'resources/images/flower-4.jpg' ),
- loader.load( 'resources/images/flower-5.jpg' ),
- loader.load( 'resources/images/flower-6.jpg' ),
- ];
- const planeSize = 256;
- const planeGeo = new THREE.PlaneGeometry( planeSize, planeSize );
- const planes = textures.map( ( texture ) => {
- const planePivot = new THREE.Object3D();
- scene.add( planePivot );
- texture.magFilter = THREE.NearestFilter;
- const planeMat = new THREE.MeshBasicMaterial( {
- map: texture,
- side: THREE.DoubleSide,
- } );
- const mesh = new THREE.Mesh( planeGeo, planeMat );
- planePivot.add( mesh );
- // move plane so top left corner is origin
- mesh.position.set( planeSize / 2, planeSize / 2, 0 );
- return planePivot;
- } );
- function resizeRendererToDisplaySize( renderer ) {
- const canvas = renderer.domElement;
- const width = canvas.clientWidth;
- const height = canvas.clientHeight;
- const needResize = canvas.width !== width || canvas.height !== height;
- if ( needResize ) {
- renderer.setSize( width, height, false );
- }
- return needResize;
- }
- function render( time ) {
- time *= 0.001; // convert to seconds;
- if ( resizeRendererToDisplaySize( renderer ) ) {
- camera.right = canvas.width;
- camera.bottom = canvas.height;
- camera.updateProjectionMatrix();
- }
- const distAcross = Math.max( 20, canvas.width - planeSize );
- const distDown = Math.max( 20, canvas.height - planeSize );
- // total distance to move across and back
- const xRange = distAcross * 2;
- const yRange = distDown * 2;
- const speed = 180;
- planes.forEach( ( plane, ndx ) => {
- // compute a unique time for each plane
- const t = time * speed + ndx * 300;
- // get a value between 0 and range
- const xt = t % xRange;
- const yt = t % yRange;
- // set our position going forward if 0 to half of range
- // and backward if half of range to range
- const x = xt < distAcross ? xt : xRange - xt;
- const y = yt < distDown ? yt : yRange - yt;
- plane.position.set( x, y, 0 );
- } );
- renderer.render( scene, camera );
- requestAnimationFrame( render );
- }
- requestAnimationFrame( render );
- }
- main();
- </script>
- </html>
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