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<head>
<title>three.js webgl - materials - manual mipmaping</title>
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body {
color: #aaa;
font-family:Monospace;
font-size:13px;
text-align:center;
background-color: #000;
margin: 0px;
overflow: hidden;
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#info {
position: absolute;
top: 0px; width: 100%;
padding: 5px;
z-index:100;
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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 }
#lbl_left { text-align:left; left:0px }
#lbl_right { text-align:left; right:0px }
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a { color:red }
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<div id="info">
<a href="http://threejs.org" target="_blank">three.js</a> - texture manual mipmapping example
- painting by <a href="http://en.wikipedia.org/wiki/Basket_of_Fruit_%28Caravaggio%29">Caravaggio</a>
</div>
<div id="lbl_left" class="lbl">
Floor <span class="g">(128x128)</span><br/>
mag: <span class="c">Linear</span><br/>
min: <span class="c">LinearMipMapLinear</span><br/>
<br/>
Painting <span class="g">(748x600)</span><br/>
mag: <span class="c">Linear</span><br/>
min: <span class="c">Linear</span>
</div>
<div id="lbl_right" class="lbl">
Floor <br/>
mag: <span class="c">Nearest</span><br/>
min: <span class="c">NearestMipMapNearestFilter</span><br/>
<br/>
Painting <br/>
mag: <span class="c">Nearest</span><br/>
min: <span class="c">Nearest</span>
</div>
<script src="../build/three.min.js"></script>
<script src="js/Detector.js"></script>
<script src="js/libs/stats.min.js"></script>
<script>
if ( !Detector.webgl ) Detector.addGetWebGLMessage();
var SCREEN_WIDTH = window.innerWidth;
var SCREEN_HEIGHT = window.innerHeight;
var container, stats;
var camera, scene1, scene2, renderer;
var mouseX = 0, mouseY = 0;
var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
camera = new THREE.PerspectiveCamera( 35, SCREEN_WIDTH / SCREEN_HEIGHT, 1, 5000 );
camera.position.z = 1500;
scene1 = new THREE.Scene();
scene1.fog = new THREE.Fog( 0x000000, 1500, 4000 );
scene2 = new THREE.Scene();
scene2.fog = scene1.fog;
// GROUND
function mipmap( size, color ) {
var imageCanvas = document.createElement( "canvas" ),
context = imageCanvas.getContext( "2d" );
imageCanvas.width = imageCanvas.height = size;
context.fillStyle = "#444";
context.fillRect( 0, 0, size, size );
context.fillStyle = color;
context.fillRect( 0, 0, size / 2, size / 2 );
context.fillRect( size / 2, size / 2, size / 2, size / 2 );
return imageCanvas;
}
var canvas = mipmap( 128, '#f00' );
var textureCanvas1 = new THREE.Texture( canvas, THREE.UVMapping, THREE.RepeatWrapping, THREE.RepeatWrapping );
textureCanvas1.repeat.set( 1000, 1000 );
textureCanvas1.mipmaps[ 0 ] = canvas;
textureCanvas1.mipmaps[ 1 ] = mipmap( 64, '#0f0' );
textureCanvas1.mipmaps[ 2 ] = mipmap( 32, '#00f' );
textureCanvas1.mipmaps[ 3 ] = mipmap( 16, '#400' );
textureCanvas1.mipmaps[ 4 ] = mipmap( 8, '#040' );
textureCanvas1.mipmaps[ 5 ] = mipmap( 4, '#004' );
textureCanvas1.mipmaps[ 6 ] = mipmap( 2, '#044' );
textureCanvas1.mipmaps[ 7 ] = mipmap( 1, '#404' );
textureCanvas1.needsUpdate = true;
materialCanvas1 = new THREE.MeshBasicMaterial( { map: textureCanvas1 } );
var textureCanvas2 = textureCanvas1.clone();
textureCanvas2.magFilter = THREE.NearestFilter;
textureCanvas2.minFilter = THREE.NearestMipMapNearestFilter;
textureCanvas2.needsUpdate = true;
materialCanvas2 = new THREE.MeshBasicMaterial( { color: 0xffccaa, map: textureCanvas2 } );
var geometry = new THREE.PlaneBufferGeometry( 100, 100 );
var meshCanvas1 = new THREE.Mesh( geometry, materialCanvas1 );
meshCanvas1.rotation.x = -Math.PI / 2;
meshCanvas1.scale.set(1000, 1000, 1000);
var meshCanvas2 = new THREE.Mesh( geometry, materialCanvas2 );
meshCanvas2.rotation.x = -Math.PI / 2;
meshCanvas2.scale.set( 1000, 1000, 1000 );
// PAINTING
var callbackPainting = function () {
var image = texturePainting1.image;
texturePainting2.image = image;
texturePainting2.needsUpdate = true;
scene1.add( meshCanvas1 );
scene2.add( meshCanvas2 );
var geometry = new THREE.PlaneBufferGeometry( 100, 100 );
var mesh1 = new THREE.Mesh( geometry, materialPainting1 );
var mesh2 = new THREE.Mesh( geometry, materialPainting2 );
addPainting( scene1, mesh1 );
addPainting( scene2, mesh2 );
function addPainting( zscene, zmesh ) {
zmesh.scale.x = image.width / 100;
zmesh.scale.y = image.height / 100;
zscene.add( zmesh );
var meshFrame = new THREE.Mesh( geometry, new THREE.MeshBasicMaterial( { color: 0x000000, polygonOffset: true, polygonOffsetFactor: 1, polygonOffsetUnits: 5 } ) );
meshFrame.scale.x = 1.1 * image.width / 100;
meshFrame.scale.y = 1.1 * image.height / 100;
zscene.add( meshFrame );
var meshShadow = new THREE.Mesh( geometry, new THREE.MeshBasicMaterial( { color: 0x000000, opacity: 0.75, transparent: true } ) );
meshShadow.position.y = -1.1 * image.height / 2;
meshShadow.position.z = -1.1 * image.height / 2;
meshShadow.rotation.x = -Math.PI / 2;
meshShadow.scale.x = 1.1 * image.width / 100;
meshShadow.scale.y = 1.1 * image.height / 100;
zscene.add( meshShadow );
var floorHeight = -1.117 * image.height / 2;
meshCanvas1.position.y = meshCanvas2.position.y = floorHeight;
}
};
var texturePainting1 = THREE.ImageUtils.loadTexture( "textures/758px-Canestra_di_frutta_(Caravaggio).jpg", THREE.UVMapping, callbackPainting ),
texturePainting2 = new THREE.Texture(),
materialPainting1 = new THREE.MeshBasicMaterial( { color: 0xffffff, map: texturePainting1 } ),
materialPainting2 = new THREE.MeshBasicMaterial( { color: 0xffccaa, map: texturePainting2 } );
texturePainting2.minFilter = texturePainting2.magFilter = THREE.NearestFilter;
texturePainting1.minFilter = texturePainting1.magFilter = THREE.LinearFilter;
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setClearColor( scene1.fog.color );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( SCREEN_WIDTH, SCREEN_HEIGHT );
renderer.autoClear = false;
renderer.domElement.style.position = "relative";
container.appendChild( renderer.domElement );
stats = new Stats();
stats.domElement.style.position = 'absolute';
stats.domElement.style.top = '0px';
stats.domElement.style.zIndex = 100;
//container.appendChild( stats.domElement );
document.addEventListener( 'mousemove', onDocumentMouseMove, false );
}
function onDocumentMouseMove( event ) {
mouseX = ( event.clientX - windowHalfX );
mouseY = ( event.clientY - windowHalfY );
}
function animate() {
requestAnimationFrame( animate );
render();
stats.update();
}
function render() {
camera.position.x += ( mouseX - camera.position.x ) * .05;
camera.position.y += ( -( mouseY - 200 ) - camera.position.y ) * .05;
camera.lookAt( scene1.position );
renderer.enableScissorTest( false );
renderer.clear();
renderer.enableScissorTest( true );
renderer.setScissor( 0, 0, SCREEN_WIDTH / 2 - 2, SCREEN_HEIGHT );
renderer.render( scene1, camera );
renderer.setScissor( SCREEN_WIDTH / 2, 0, SCREEN_WIDTH / 2 - 2, SCREEN_HEIGHT );
renderer.render( scene2, camera );
}
</script>
</body>
</html>