mirror of
https://github.com/Doodle3D/Doodle3D-Slicer.git
synced 2024-12-24 03:53:49 +01:00
310 lines
8.2 KiB
HTML
Executable File
310 lines
8.2 KiB
HTML
Executable File
<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js webgl - buffergeometry - lines drawcalls</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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<style>
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body {
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color: #cccccc;
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font-family:Monospace;
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font-size:13px;
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text-align:center;
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background-color: #000000;
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margin: 0px;
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overflow: hidden;
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}
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#info {
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position: absolute;
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top: 0px; width: 100%;
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padding: 5px;
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}
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a {
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color: #0080ff;
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}
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</style>
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</head>
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<body>
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<div id="container"></div>
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<div id="info">
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<a href="http://threejs.org" target="_blank">three.js</a> webgl - buffergeometry drawcalls - by <a href="https://twitter.com/fernandojsg">fernandojsg</a>
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</div>
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<script src="js/libs/dat.gui.min.js"></script>
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<script src="../build/three.min.js"></script>
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<script src="js/controls/OrbitControls.js"></script>
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<script src="js/libs/stats.min.js"></script>
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<script>
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var group;
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var container, stats;
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var particlesData = [];
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var camera, scene, renderer;
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var positions,colors;
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var pointCloud;
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var particlePositions;
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var linesMesh;
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var maxParticleCount = 1000;
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var particleCount = 500;
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var r = 800;
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var rHalf = r / 2;
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var effectController = {
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showDots: true,
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showLines: true,
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minDistance: 150,
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limitConnections: false,
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maxConnections: 20,
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particleCount: 500
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}
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init();
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animate();
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function initGUI() {
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var gui = new dat.GUI();
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gui.add( effectController, "showDots" ).onChange( function( value ) { pointCloud.visible = value; } );
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gui.add( effectController, "showLines" ).onChange( function( value ) { linesMesh.visible = value; } );
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gui.add( effectController, "minDistance", 10, 300 );
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gui.add( effectController, "limitConnections" );
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gui.add( effectController, "maxConnections", 0, 30, 1 );
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gui.add( effectController, "particleCount", 0, maxParticleCount, 1 ).onChange( function( value ) {
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particleCount = parseInt( value );
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particles.drawcalls[ 0 ].count = particleCount;
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});
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}
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function init() {
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initGUI();
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container = document.getElementById( 'container' );
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//
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camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 4000 );
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camera.position.z = 1750;
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controls = new THREE.OrbitControls( camera, container );
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scene = new THREE.Scene();
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group = new THREE.Group();
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scene.add( group );
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var helper = new THREE.BoxHelper( new THREE.Mesh( new THREE.BoxGeometry( r, r, r ) ) );
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helper.material.color.setHex( 0x080808 );
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helper.material.blending = THREE.AdditiveBlending;
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helper.material.transparent = true;
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group.add( helper );
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var segments = maxParticleCount * maxParticleCount;
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positions = new Float32Array( segments * 3 );
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colors = new Float32Array( segments * 3 );
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var pMaterial = new THREE.PointCloudMaterial( {
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color: 0xFFFFFF,
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size: 3,
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blending: THREE.AdditiveBlending,
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transparent: true,
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sizeAttenuation: false
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} );
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particles = new THREE.BufferGeometry();
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particlePositions = new Float32Array( maxParticleCount * 3 );
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for ( var i = 0; i < maxParticleCount; i++ ) {
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var x = Math.random() * r - r / 2;
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var y = Math.random() * r - r / 2;
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var z = Math.random() * r - r / 2;
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particlePositions[ i * 3 ] = x;
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particlePositions[ i * 3 + 1 ] = y;
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particlePositions[ i * 3 + 2 ] = z;
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// add it to the geometry
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particlesData.push( {
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velocity: new THREE.Vector3( -1 + Math.random() * 2, -1 + Math.random() * 2, -1 + Math.random() * 2 ),
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numConnections: 0
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} );
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}
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particles.drawcalls.push( {
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start: 0,
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count: particleCount,
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index: 0
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} );
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particles.addAttribute( 'position', new THREE.DynamicBufferAttribute( particlePositions, 3 ) );
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// create the particle system
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pointCloud = new THREE.PointCloud( particles, pMaterial );
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group.add( pointCloud );
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var geometry = new THREE.BufferGeometry();
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geometry.addAttribute( 'position', new THREE.DynamicBufferAttribute( positions, 3 ) );
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geometry.addAttribute( 'color', new THREE.DynamicBufferAttribute( colors, 3 ) );
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geometry.computeBoundingSphere();
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geometry.drawcalls.push( {
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start: 0,
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count: 0,
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index: 0
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} );
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var material = new THREE.LineBasicMaterial( {
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vertexColors: THREE.VertexColors,
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blending: THREE.AdditiveBlending,
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transparent: true
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} );
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linesMesh = new THREE.Line( geometry, material, THREE.LinePieces );
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group.add( linesMesh );
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//
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renderer = new THREE.WebGLRenderer( { antialias: true } );
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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renderer.gammaInput = true;
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renderer.gammaOutput = true;
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container.appendChild( renderer.domElement );
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//
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stats = new Stats();
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stats.domElement.style.position = 'absolute';
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stats.domElement.style.top = '0px';
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container.appendChild( stats.domElement );
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window.addEventListener( 'resize', onWindowResize, false );
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}
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function onWindowResize() {
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camera.aspect = window.innerWidth / window.innerHeight;
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camera.updateProjectionMatrix();
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renderer.setSize( window.innerWidth, window.innerHeight );
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}
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function animate() {
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var vertexpos = 0;
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var colorpos = 0;
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var numConnected = 0;
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for ( var i = 0; i < particleCount; i++ )
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particlesData[ i ].numConnections = 0;
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for ( var i = 0; i < particleCount; i++ ) {
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// get the particle
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var particleData = particlesData[i];
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particlePositions[ i * 3 ] += particleData.velocity.x;
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particlePositions[ i * 3 + 1 ] += particleData.velocity.y;
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particlePositions[ i * 3 + 2 ] += particleData.velocity.z;
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if ( particlePositions[ i * 3 + 1 ] < -rHalf || particlePositions[ i * 3 + 1 ] > rHalf )
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particleData.velocity.y = -particleData.velocity.y;
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if ( particlePositions[ i * 3 ] < -rHalf || particlePositions[ i * 3 ] > rHalf )
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particleData.velocity.x = -particleData.velocity.x;
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if ( particlePositions[ i * 3 + 2 ] < -rHalf || particlePositions[ i * 3 + 2 ] > rHalf )
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particleData.velocity.z = -particleData.velocity.z;
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if ( effectController.limitConnections && particleData.numConnections >= effectController.maxConnections )
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continue;
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// Check collision
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for ( var j = i + 1; j < particleCount; j++ ) {
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var particleDataB = particlesData[ j ];
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if ( effectController.limitConnections && particleDataB.numConnections >= effectController.maxConnections )
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continue;
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var dx = particlePositions[ i * 3 ] - particlePositions[ j * 3 ];
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var dy = particlePositions[ i * 3 + 1 ] - particlePositions[ j * 3 + 1 ];
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var dz = particlePositions[ i * 3 + 2 ] - particlePositions[ j * 3 + 2 ];
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var dist = Math.sqrt( dx * dx + dy * dy + dz * dz );
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if ( dist < effectController.minDistance ) {
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particleData.numConnections++;
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particleDataB.numConnections++;
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var alpha = 1.0 - dist / effectController.minDistance;
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positions[ vertexpos++ ] = particlePositions[ i * 3 ];
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positions[ vertexpos++ ] = particlePositions[ i * 3 + 1 ];
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positions[ vertexpos++ ] = particlePositions[ i * 3 + 2 ];
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positions[ vertexpos++ ] = particlePositions[ j * 3 ];
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positions[ vertexpos++ ] = particlePositions[ j * 3 + 1 ];
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positions[ vertexpos++ ] = particlePositions[ j * 3 + 2 ];
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colors[ colorpos++ ] = alpha;
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colors[ colorpos++ ] = alpha;
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colors[ colorpos++ ] = alpha;
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colors[ colorpos++ ] = alpha;
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colors[ colorpos++ ] = alpha;
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colors[ colorpos++ ] = alpha;
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numConnected++;
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}
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}
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}
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linesMesh.geometry.drawcalls[ 0 ].count = numConnected * 2;
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linesMesh.geometry.attributes.position.needsUpdate = true;
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linesMesh.geometry.attributes.color.needsUpdate = true;
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pointCloud.geometry.attributes.position.needsUpdate = true;
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requestAnimationFrame( animate );
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stats.update();
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render();
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}
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function render() {
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var time = Date.now() * 0.001;
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group.rotation.y = time * 0.1;
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renderer.render( scene, camera );
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}
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</script>
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</body>
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</html>
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