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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 WebGPU - 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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+
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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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+
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+ .g { color:#aaa }
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+ .c { color:#fa0 }
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+
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+ </style>
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+ </head>
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+
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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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+
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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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+
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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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+
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+ <script type="importmap">
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+ {
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+ "imports": {
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+ "three": "../build/three.webgpu.js",
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+ "three/webgpu": "../build/three.webgpu.js",
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+ "three/tsl": "../build/three.tsl.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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+
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+ <script type="module">
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+
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+ import * as THREE from 'three/webgpu';
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+
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+ const SCREEN_WIDTH = window.innerWidth;
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+ const SCREEN_HEIGHT = window.innerHeight;
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+
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+ let container;
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+
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+ let camera, scene1, scene2, renderer;
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+
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+ let mouseX = 0, mouseY = 0;
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+
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+ const windowHalfX = window.innerWidth / 2;
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+ const windowHalfY = window.innerHeight / 2;
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+
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+ init();
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+
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+ async function init() {
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+
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+ container = document.createElement( 'div' );
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+ document.body.appendChild( container );
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+
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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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+
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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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+
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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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+
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+ // GROUND
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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.colorSpace = THREE.SRGBColorSpace;
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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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+
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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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+
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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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+
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+ const geometry = new THREE.PlaneGeometry( 100, 100 );
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+
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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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+
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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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+
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+ scene1.add( meshCanvas1 );
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+ scene2.add( meshCanvas2 );
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+
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+ // PAINTING
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+
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+ const texturePainting1 = await new THREE.TextureLoader().loadAsync( 'textures/758px-Canestra_di_frutta_(Caravaggio).jpg' );
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+ const texturePainting2 = texturePainting1.clone();
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+
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+ texturePainting1.colorSpace = THREE.SRGBColorSpace;
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+ texturePainting2.colorSpace = THREE.SRGBColorSpace;
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+
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+ texturePainting1.minFilter = texturePainting1.magFilter = THREE.LinearFilter;
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+ texturePainting2.minFilter = texturePainting2.magFilter = THREE.NearestFilter;
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+
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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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+
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+ const geometryPainting = new THREE.PlaneGeometry( 100, 100 );
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+ const mesh1 = new THREE.Mesh( geometryPainting, materialPainting1 );
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+ const mesh2 = new THREE.Mesh( geometryPainting, materialPainting2 );
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+
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+ addPainting( scene1, mesh1 );
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+ addPainting( scene2, mesh2 );
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+
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+ function addPainting( zscene, zmesh ) {
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+
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+ const image = texturePainting1.image;
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+
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+ zmesh.scale.x = image.width / 100;
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+ zmesh.scale.y = image.height / 100;
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+
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+ zscene.add( zmesh );
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+
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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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+
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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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+
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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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+
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+ renderer = new THREE.WebGPURenderer( { 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.setAnimationLoop( animate );
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+ renderer.autoClear = false;
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+
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+ renderer.domElement.style.position = 'relative';
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+ container.appendChild( renderer.domElement );
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+
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+ document.addEventListener( 'mousemove', onDocumentMouseMove );
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+
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+ }
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+
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+ function mipmap( size, color ) {
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+
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+ const imageCanvas = document.createElement( 'canvas' );
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+ const context = imageCanvas.getContext( '2d' );
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+
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+ imageCanvas.width = imageCanvas.height = size;
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+
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+ context.fillStyle = '#444';
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+ context.fillRect( 0, 0, size, size );
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+
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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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+ }
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+
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+ function onDocumentMouseMove( event ) {
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+
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+ mouseX = ( event.clientX - windowHalfX );
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+ mouseY = ( event.clientY - windowHalfY );
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+
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+ }
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+
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+
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+ function animate() {
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+
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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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+
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+ camera.lookAt( scene1.position );
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+
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+ renderer.clear();
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+ renderer.setScissorTest( true );
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+
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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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+
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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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+
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+ renderer.setScissorTest( false );
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+
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+ }
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+
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+ </script>
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+
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+ </body>
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+</html>
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Michael Herzog
