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173 lines
3.6 KiB
HTML
173 lines
3.6 KiB
HTML
<!-- 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 - Responsive</title>
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<style>
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html, body {
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height: 100%;
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margin: 0;
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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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</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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<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( { antialias: true, canvas } );
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const rtWidth = 512;
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const rtHeight = 512;
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const renderTarget = new THREE.WebGLRenderTarget( rtWidth, rtHeight );
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const rtFov = 75;
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const rtAspect = rtWidth / rtHeight;
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const rtNear = 0.1;
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const rtFar = 5;
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const rtCamera = new THREE.PerspectiveCamera( rtFov, rtAspect, rtNear, rtFar );
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rtCamera.position.z = 2;
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const rtScene = new THREE.Scene();
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rtScene.background = new THREE.Color( 'red' );
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{
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const color = 0xFFFFFF;
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const intensity = 3;
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const light = new THREE.DirectionalLight( color, intensity );
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light.position.set( - 1, 2, 4 );
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rtScene.add( light );
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}
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const boxWidth = 1;
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const boxHeight = 1;
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const boxDepth = 1;
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const geometry = new THREE.BoxGeometry( boxWidth, boxHeight, boxDepth );
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function makeInstance( geometry, color, x ) {
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const material = new THREE.MeshPhongMaterial( { color } );
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const cube = new THREE.Mesh( geometry, material );
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rtScene.add( cube );
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cube.position.x = x;
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return cube;
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}
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const rtCubes = [
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makeInstance( geometry, 0x44aa88, 0 ),
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makeInstance( geometry, 0x8844aa, - 2 ),
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makeInstance( geometry, 0xaa8844, 2 ),
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];
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const fov = 75;
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const aspect = 2; // the canvas default
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const near = 0.1;
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const far = 5;
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const camera = new THREE.PerspectiveCamera( fov, aspect, near, far );
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camera.position.z = 2;
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const scene = new THREE.Scene();
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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( - 1, 2, 4 );
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scene.add( light );
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}
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const material = new THREE.MeshPhongMaterial( {
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map: renderTarget.texture,
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} );
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const cube = new THREE.Mesh( geometry, material );
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scene.add( cube );
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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;
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if ( resizeRendererToDisplaySize( renderer ) ) {
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const canvas = renderer.domElement;
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camera.aspect = canvas.clientWidth / canvas.clientHeight;
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camera.updateProjectionMatrix();
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}
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// rotate all the cubes in the render target scene
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rtCubes.forEach( ( cube, ndx ) => {
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const speed = 1 + ndx * .1;
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const rot = time * speed;
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cube.rotation.x = rot;
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cube.rotation.y = rot;
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} );
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// draw render target scene to render target
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renderer.setRenderTarget( renderTarget );
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renderer.render( rtScene, rtCamera );
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renderer.setRenderTarget( null );
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// rotate the cube in the scene
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cube.rotation.x = time;
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cube.rotation.y = time * 1.1;
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// render the scene to the canvas
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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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