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256 lines
7.7 KiB
256 lines
7.7 KiB
2 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 - materials - manual mipmaping</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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<style>
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.lbl { color:#fff; font-size:16px; font-weight:bold; position: absolute; bottom:0px; z-index:100; text-shadow:#000 1px 1px 1px; background-color:rgba(0,0,0,0.85); padding:1em }
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#lbl_left { text-align:left; left:0px }
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#lbl_right { text-align:left; right:0px }
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.g { color:#aaa }
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.c { color:#fa0 }
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</style>
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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> - texture manual mipmapping example<br/>
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painting by <a href="http://en.wikipedia.org/wiki/Basket_of_Fruit_%28Caravaggio%29">Caravaggio</a>
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</div>
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<div id="lbl_left" class="lbl">
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Floor <span class="g">(128x128)</span><br/>
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mag: <span class="c">Linear</span><br/>
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min: <span class="c">LinearMipmapLinear</span><br/>
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<br/>
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Painting <span class="g">(748x600)</span><br/>
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mag: <span class="c">Linear</span><br/>
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min: <span class="c">Linear</span>
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</div>
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<div id="lbl_right" class="lbl">
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Floor <br/>
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mag: <span class="c">Nearest</span><br/>
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min: <span class="c">NearestMipmapNearestFilter</span><br/>
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<br/>
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Painting <br/>
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mag: <span class="c">Nearest</span><br/>
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min: <span class="c">Nearest</span>
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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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const SCREEN_WIDTH = window.innerWidth;
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const SCREEN_HEIGHT = window.innerHeight;
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let container;
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let camera, scene1, scene2, renderer;
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let mouseX = 0, mouseY = 0;
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const windowHalfX = window.innerWidth / 2;
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const windowHalfY = window.innerHeight / 2;
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init();
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animate();
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function init() {
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container = document.createElement( 'div' );
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document.body.appendChild( container );
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camera = new THREE.PerspectiveCamera( 35, SCREEN_WIDTH / SCREEN_HEIGHT, 1, 5000 );
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camera.position.z = 1500;
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scene1 = new THREE.Scene();
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scene1.background = new THREE.Color( 0x000000 );
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scene1.fog = new THREE.Fog( 0x000000, 1500, 4000 );
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scene2 = new THREE.Scene();
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scene2.background = new THREE.Color( 0x000000 );
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scene2.fog = new THREE.Fog( 0x000000, 1500, 4000 );
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// GROUND
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function mipmap( size, color ) {
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const imageCanvas = document.createElement( 'canvas' );
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const context = imageCanvas.getContext( '2d' );
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imageCanvas.width = imageCanvas.height = size;
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context.fillStyle = '#444';
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context.fillRect( 0, 0, size, size );
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context.fillStyle = color;
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context.fillRect( 0, 0, size / 2, size / 2 );
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context.fillRect( size / 2, size / 2, size / 2, size / 2 );
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return imageCanvas;
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}
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const canvas = mipmap( 128, '#f00' );
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const textureCanvas1 = new THREE.CanvasTexture( canvas );
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textureCanvas1.mipmaps[ 0 ] = canvas;
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textureCanvas1.mipmaps[ 1 ] = mipmap( 64, '#0f0' );
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textureCanvas1.mipmaps[ 2 ] = mipmap( 32, '#00f' );
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textureCanvas1.mipmaps[ 3 ] = mipmap( 16, '#400' );
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textureCanvas1.mipmaps[ 4 ] = mipmap( 8, '#040' );
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textureCanvas1.mipmaps[ 5 ] = mipmap( 4, '#004' );
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textureCanvas1.mipmaps[ 6 ] = mipmap( 2, '#044' );
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textureCanvas1.mipmaps[ 7 ] = mipmap( 1, '#404' );
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textureCanvas1.repeat.set( 1000, 1000 );
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textureCanvas1.wrapS = THREE.RepeatWrapping;
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textureCanvas1.wrapT = THREE.RepeatWrapping;
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const textureCanvas2 = textureCanvas1.clone();
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textureCanvas2.magFilter = THREE.NearestFilter;
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textureCanvas2.minFilter = THREE.NearestMipmapNearestFilter;
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const materialCanvas1 = new THREE.MeshBasicMaterial( { map: textureCanvas1 } );
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const materialCanvas2 = new THREE.MeshBasicMaterial( { color: 0xffccaa, map: textureCanvas2 } );
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const geometry = new THREE.PlaneGeometry( 100, 100 );
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const meshCanvas1 = new THREE.Mesh( geometry, materialCanvas1 );
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meshCanvas1.rotation.x = - Math.PI / 2;
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meshCanvas1.scale.set( 1000, 1000, 1000 );
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const meshCanvas2 = new THREE.Mesh( geometry, materialCanvas2 );
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meshCanvas2.rotation.x = - Math.PI / 2;
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meshCanvas2.scale.set( 1000, 1000, 1000 );
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// PAINTING
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const callbackPainting = function () {
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const image = texturePainting1.image;
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texturePainting2.image = image;
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texturePainting2.needsUpdate = true;
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scene1.add( meshCanvas1 );
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scene2.add( meshCanvas2 );
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const geometry = new THREE.PlaneGeometry( 100, 100 );
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const mesh1 = new THREE.Mesh( geometry, materialPainting1 );
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const mesh2 = new THREE.Mesh( geometry, materialPainting2 );
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addPainting( scene1, mesh1 );
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addPainting( scene2, mesh2 );
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function addPainting( zscene, zmesh ) {
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zmesh.scale.x = image.width / 100;
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zmesh.scale.y = image.height / 100;
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zscene.add( zmesh );
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const meshFrame = new THREE.Mesh( geometry, new THREE.MeshBasicMaterial( { color: 0x000000 } ) );
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meshFrame.position.z = - 10.0;
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meshFrame.scale.x = 1.1 * image.width / 100;
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meshFrame.scale.y = 1.1 * image.height / 100;
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zscene.add( meshFrame );
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const meshShadow = new THREE.Mesh( geometry, new THREE.MeshBasicMaterial( { color: 0x000000, opacity: 0.75, transparent: true } ) );
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meshShadow.position.y = - 1.1 * image.height / 2;
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meshShadow.position.z = - 1.1 * image.height / 2;
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meshShadow.rotation.x = - Math.PI / 2;
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meshShadow.scale.x = 1.1 * image.width / 100;
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meshShadow.scale.y = 1.1 * image.height / 100;
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zscene.add( meshShadow );
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const floorHeight = - 1.117 * image.height / 2;
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meshCanvas1.position.y = meshCanvas2.position.y = floorHeight;
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}
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};
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const texturePainting1 = new THREE.TextureLoader().load( 'textures/758px-Canestra_di_frutta_(Caravaggio).jpg', callbackPainting );
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const texturePainting2 = new THREE.Texture();
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const materialPainting1 = new THREE.MeshBasicMaterial( { color: 0xffffff, map: texturePainting1 } );
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const materialPainting2 = new THREE.MeshBasicMaterial( { color: 0xffccaa, map: texturePainting2 } );
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texturePainting2.minFilter = texturePainting2.magFilter = THREE.NearestFilter;
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texturePainting1.minFilter = texturePainting1.magFilter = THREE.LinearFilter;
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texturePainting1.mapping = THREE.UVMapping;
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renderer = new THREE.WebGLRenderer( { antialias: true } );
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( SCREEN_WIDTH, SCREEN_HEIGHT );
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renderer.autoClear = false;
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renderer.domElement.style.position = 'relative';
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container.appendChild( renderer.domElement );
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document.addEventListener( 'mousemove', onDocumentMouseMove );
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}
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function onDocumentMouseMove( event ) {
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mouseX = ( event.clientX - windowHalfX );
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mouseY = ( event.clientY - windowHalfY );
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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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camera.position.x += ( mouseX - camera.position.x ) * .05;
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camera.position.y += ( - ( mouseY - 200 ) - camera.position.y ) * .05;
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camera.lookAt( scene1.position );
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renderer.clear();
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renderer.setScissorTest( true );
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renderer.setScissor( 0, 0, SCREEN_WIDTH / 2 - 2, SCREEN_HEIGHT );
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renderer.render( scene1, camera );
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renderer.setScissor( SCREEN_WIDTH / 2, 0, SCREEN_WIDTH / 2 - 2, SCREEN_HEIGHT );
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renderer.render( scene2, camera );
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renderer.setScissorTest( false );
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}
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</script>
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</body>
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</html>
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