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245 lines
6.0 KiB
245 lines
6.0 KiB
3 years ago
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js webgl - sprites</title>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
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<link type="text/css" rel="stylesheet" href="main.css">
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</head>
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<body>
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<div id="info">
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<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - sprites
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</div>
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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/": "./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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let camera, scene, renderer;
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let cameraOrtho, sceneOrtho;
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let spriteTL, spriteTR, spriteBL, spriteBR, spriteC;
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let mapC;
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let group;
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init();
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animate();
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function init() {
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const width = window.innerWidth;
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const height = window.innerHeight;
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camera = new THREE.PerspectiveCamera( 60, width / height, 1, 2100 );
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camera.position.z = 1500;
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cameraOrtho = new THREE.OrthographicCamera( - width / 2, width / 2, height / 2, - height / 2, 1, 10 );
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cameraOrtho.position.z = 10;
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scene = new THREE.Scene();
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scene.fog = new THREE.Fog( 0x000000, 1500, 2100 );
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sceneOrtho = new THREE.Scene();
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// create sprites
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const amount = 200;
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const radius = 500;
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const textureLoader = new THREE.TextureLoader();
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textureLoader.load( 'textures/sprite0.png', createHUDSprites );
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const mapB = textureLoader.load( 'textures/sprite1.png' );
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mapC = textureLoader.load( 'textures/sprite2.png' );
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group = new THREE.Group();
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const materialC = new THREE.SpriteMaterial( { map: mapC, color: 0xffffff, fog: true } );
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const materialB = new THREE.SpriteMaterial( { map: mapB, color: 0xffffff, fog: true } );
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for ( let a = 0; a < amount; a ++ ) {
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const x = Math.random() - 0.5;
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const y = Math.random() - 0.5;
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const z = Math.random() - 0.5;
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let material;
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if ( z < 0 ) {
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material = materialB.clone();
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} else {
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material = materialC.clone();
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material.color.setHSL( 0.5 * Math.random(), 0.75, 0.5 );
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material.map.offset.set( - 0.5, - 0.5 );
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material.map.repeat.set( 2, 2 );
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}
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const sprite = new THREE.Sprite( material );
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sprite.position.set( x, y, z );
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sprite.position.normalize();
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sprite.position.multiplyScalar( radius );
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group.add( sprite );
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}
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scene.add( group );
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// renderer
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renderer = new THREE.WebGLRenderer();
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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renderer.autoClear = false; // To allow render overlay on top of sprited sphere
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document.body.appendChild( renderer.domElement );
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//
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window.addEventListener( 'resize', onWindowResize );
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}
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function createHUDSprites( texture ) {
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const material = new THREE.SpriteMaterial( { map: texture } );
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const width = material.map.image.width;
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const height = material.map.image.height;
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spriteTL = new THREE.Sprite( material );
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spriteTL.center.set( 0.0, 1.0 );
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spriteTL.scale.set( width, height, 1 );
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sceneOrtho.add( spriteTL );
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spriteTR = new THREE.Sprite( material );
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spriteTR.center.set( 1.0, 1.0 );
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spriteTR.scale.set( width, height, 1 );
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sceneOrtho.add( spriteTR );
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spriteBL = new THREE.Sprite( material );
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spriteBL.center.set( 0.0, 0.0 );
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spriteBL.scale.set( width, height, 1 );
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sceneOrtho.add( spriteBL );
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spriteBR = new THREE.Sprite( material );
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spriteBR.center.set( 1.0, 0.0 );
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spriteBR.scale.set( width, height, 1 );
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sceneOrtho.add( spriteBR );
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spriteC = new THREE.Sprite( material );
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spriteC.center.set( 0.5, 0.5 );
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spriteC.scale.set( width, height, 1 );
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sceneOrtho.add( spriteC );
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updateHUDSprites();
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}
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function updateHUDSprites() {
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const width = window.innerWidth / 2;
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const height = window.innerHeight / 2;
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spriteTL.position.set( - width, height, 1 ); // top left
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spriteTR.position.set( width, height, 1 ); // top right
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spriteBL.position.set( - width, - height, 1 ); // bottom left
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spriteBR.position.set( width, - height, 1 ); // bottom right
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spriteC.position.set( 0, 0, 1 ); // center
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}
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function onWindowResize() {
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const width = window.innerWidth;
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const height = window.innerHeight;
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camera.aspect = width / height;
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camera.updateProjectionMatrix();
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cameraOrtho.left = - width / 2;
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cameraOrtho.right = width / 2;
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cameraOrtho.top = height / 2;
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cameraOrtho.bottom = - height / 2;
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cameraOrtho.updateProjectionMatrix();
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updateHUDSprites();
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renderer.setSize( window.innerWidth, window.innerHeight );
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}
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function animate() {
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requestAnimationFrame( animate );
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render();
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}
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function render() {
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const time = Date.now() / 1000;
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for ( let i = 0, l = group.children.length; i < l; i ++ ) {
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const sprite = group.children[ i ];
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const material = sprite.material;
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const scale = Math.sin( time + sprite.position.x * 0.01 ) * 0.3 + 1.0;
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let imageWidth = 1;
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let imageHeight = 1;
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if ( material.map && material.map.image && material.map.image.width ) {
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imageWidth = material.map.image.width;
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imageHeight = material.map.image.height;
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}
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sprite.material.rotation += 0.1 * ( i / l );
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sprite.scale.set( scale * imageWidth, scale * imageHeight, 1.0 );
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if ( material.map !== mapC ) {
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material.opacity = Math.sin( time + sprite.position.x * 0.01 ) * 0.4 + 0.6;
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}
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}
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group.rotation.x = time * 0.5;
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group.rotation.y = time * 0.75;
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group.rotation.z = time * 1.0;
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renderer.clear();
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renderer.render( scene, camera );
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renderer.clearDepth();
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renderer.render( sceneOrtho, cameraOrtho );
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}
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</script>
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</body>
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</html>
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