mirror of
https://github.com/Doodle3D/Doodle3D-Slicer.git
synced 2024-12-24 12:03:48 +01:00
310 lines
8.2 KiB
HTML
310 lines
8.2 KiB
HTML
|
<!DOCTYPE html>
|
||
|
|
<html lang="en">
|
||
|
|
<head>
|
||
|
|
<title>three.js webgl - buffergeometry - lines drawcalls</title>
|
||
|
|
<meta charset="utf-8">
|
||
|
|
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
|
||
|
|
<style>
|
||
|
|
body {
|
||
|
|
color: #cccccc;
|
||
|
|
font-family:Monospace;
|
||
|
|
font-size:13px;
|
||
|
|
text-align:center;
|
||
|
|
|
||
|
|
background-color: #000000;
|
||
|
|
margin: 0px;
|
||
|
|
overflow: hidden;
|
||
|
|
}
|
||
|
|
|
||
|
|
#info {
|
||
|
|
position: absolute;
|
||
|
|
top: 0px; width: 100%;
|
||
|
|
padding: 5px;
|
||
|
|
}
|
||
|
|
|
||
|
|
a {
|
||
|
|
|
||
|
|
color: #0080ff;
|
||
|
|
}
|
||
|
|
|
||
|
|
</style>
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
|
||
|
|
<div id="container"></div>
|
||
|
|
<div id="info">
|
||
|
|
<a href="http://threejs.org" target="_blank">three.js</a> webgl - buffergeometry drawcalls - by <a href="https://twitter.com/fernandojsg">fernandojsg</a>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<script src="js/libs/dat.gui.min.js"></script>
|
||
|
|
<script src="../build/three.min.js"></script>
|
||
|
|
<script src="js/controls/OrbitControls.js"></script>
|
||
|
|
<script src="js/libs/stats.min.js"></script>
|
||
|
|
|
||
|
|
<script>
|
||
|
|
|
||
|
|
var group;
|
||
|
|
var container, stats;
|
||
|
|
var particlesData = [];
|
||
|
|
var camera, scene, renderer;
|
||
|
|
var positions,colors;
|
||
|
|
var pointCloud;
|
||
|
|
var particlePositions;
|
||
|
|
var linesMesh;
|
||
|
|
|
||
|
|
var maxParticleCount = 1000;
|
||
|
|
var particleCount = 500;
|
||
|
|
var r = 800;
|
||
|
|
var rHalf = r / 2;
|
||
|
|
|
||
|
|
var effectController = {
|
||
|
|
showDots: true,
|
||
|
|
showLines: true,
|
||
|
|
minDistance: 150,
|
||
|
|
limitConnections: false,
|
||
|
|
maxConnections: 20,
|
||
|
|
particleCount: 500
|
||
|
|
}
|
||
|
|
|
||
|
|
init();
|
||
|
|
animate();
|
||
|
|
|
||
|
|
function initGUI() {
|
||
|
|
|
||
|
|
var gui = new dat.GUI();
|
||
|
|
|
||
|
|
gui.add( effectController, "showDots" ).onChange( function( value ) { pointCloud.visible = value; } );
|
||
|
|
gui.add( effectController, "showLines" ).onChange( function( value ) { linesMesh.visible = value; } );
|
||
|
|
gui.add( effectController, "minDistance", 10, 300 );
|
||
|
|
gui.add( effectController, "limitConnections" );
|
||
|
|
gui.add( effectController, "maxConnections", 0, 30, 1 );
|
||
|
|
gui.add( effectController, "particleCount", 0, maxParticleCount, 1 ).onChange( function( value ) {
|
||
|
|
|
||
|
|
particleCount = parseInt( value );
|
||
|
|
particles.drawcalls[ 0 ].count = particleCount;
|
||
|
|
|
||
|
|
});
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function init() {
|
||
|
|
|
||
|
|
initGUI();
|
||
|
|
|
||
|
|
container = document.getElementById( 'container' );
|
||
|
|
|
||
|
|
//
|
||
|
|
|
||
|
|
camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 4000 );
|
||
|
|
camera.position.z = 1750;
|
||
|
|
|
||
|
|
controls = new THREE.OrbitControls( camera, container );
|
||
|
|
|
||
|
|
scene = new THREE.Scene();
|
||
|
|
|
||
|
|
|
||
|
|
group = new THREE.Group();
|
||
|
|
scene.add( group );
|
||
|
|
|
||
|
|
var helper = new THREE.BoxHelper( new THREE.Mesh( new THREE.BoxGeometry( r, r, r ) ) );
|
||
|
|
helper.material.color.setHex( 0x080808 );
|
||
|
|
helper.material.blending = THREE.AdditiveBlending;
|
||
|
|
helper.material.transparent = true;
|
||
|
|
group.add( helper );
|
||
|
|
|
||
|
|
var segments = maxParticleCount * maxParticleCount;
|
||
|
|
|
||
|
|
positions = new Float32Array( segments * 3 );
|
||
|
|
colors = new Float32Array( segments * 3 );
|
||
|
|
|
||
|
|
var pMaterial = new THREE.PointCloudMaterial( {
|
||
|
|
color: 0xFFFFFF,
|
||
|
|
size: 3,
|
||
|
|
blending: THREE.AdditiveBlending,
|
||
|
|
transparent: true,
|
||
|
|
sizeAttenuation: false
|
||
|
|
} );
|
||
|
|
|
||
|
|
particles = new THREE.BufferGeometry();
|
||
|
|
particlePositions = new Float32Array( maxParticleCount * 3 );
|
||
|
|
|
||
|
|
for ( var i = 0; i < maxParticleCount; i++ ) {
|
||
|
|
|
||
|
|
var x = Math.random() * r - r / 2;
|
||
|
|
var y = Math.random() * r - r / 2;
|
||
|
|
var z = Math.random() * r - r / 2;
|
||
|
|
|
||
|
|
particlePositions[ i * 3 ] = x;
|
||
|
|
particlePositions[ i * 3 + 1 ] = y;
|
||
|
|
particlePositions[ i * 3 + 2 ] = z;
|
||
|
|
|
||
|
|
// add it to the geometry
|
||
|
|
particlesData.push( {
|
||
|
|
velocity: new THREE.Vector3( -1 + Math.random() * 2, -1 + Math.random() * 2, -1 + Math.random() * 2 ),
|
||
|
|
numConnections: 0
|
||
|
|
} );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
particles.drawcalls.push( {
|
||
|
|
start: 0,
|
||
|
|
count: particleCount,
|
||
|
|
index: 0
|
||
|
|
} );
|
||
|
|
|
||
|
|
particles.addAttribute( 'position', new THREE.DynamicBufferAttribute( particlePositions, 3 ) );
|
||
|
|
|
||
|
|
// create the particle system
|
||
|
|
pointCloud = new THREE.PointCloud( particles, pMaterial );
|
||
|
|
group.add( pointCloud );
|
||
|
|
|
||
|
|
var geometry = new THREE.BufferGeometry();
|
||
|
|
|
||
|
|
geometry.addAttribute( 'position', new THREE.DynamicBufferAttribute( positions, 3 ) );
|
||
|
|
geometry.addAttribute( 'color', new THREE.DynamicBufferAttribute( colors, 3 ) );
|
||
|
|
|
||
|
|
geometry.computeBoundingSphere();
|
||
|
|
|
||
|
|
geometry.drawcalls.push( {
|
||
|
|
start: 0,
|
||
|
|
count: 0,
|
||
|
|
index: 0
|
||
|
|
} );
|
||
|
|
|
||
|
|
var material = new THREE.LineBasicMaterial( {
|
||
|
|
vertexColors: THREE.VertexColors,
|
||
|
|
blending: THREE.AdditiveBlending,
|
||
|
|
transparent: true
|
||
|
|
} );
|
||
|
|
|
||
|
|
linesMesh = new THREE.Line( geometry, material, THREE.LinePieces );
|
||
|
|
group.add( linesMesh );
|
||
|
|
|
||
|
|
//
|
||
|
|
|
||
|
|
renderer = new THREE.WebGLRenderer( { antialias: true } );
|
||
|
|
renderer.setPixelRatio( window.devicePixelRatio );
|
||
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
||
|
|
|
||
|
|
renderer.gammaInput = true;
|
||
|
|
renderer.gammaOutput = true;
|
||
|
|
|
||
|
|
container.appendChild( renderer.domElement );
|
||
|
|
|
||
|
|
//
|
||
|
|
|
||
|
|
stats = new Stats();
|
||
|
|
stats.domElement.style.position = 'absolute';
|
||
|
|
stats.domElement.style.top = '0px';
|
||
|
|
container.appendChild( stats.domElement );
|
||
|
|
|
||
|
|
window.addEventListener( 'resize', onWindowResize, false );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function onWindowResize() {
|
||
|
|
|
||
|
|
camera.aspect = window.innerWidth / window.innerHeight;
|
||
|
|
camera.updateProjectionMatrix();
|
||
|
|
|
||
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function animate() {
|
||
|
|
|
||
|
|
var vertexpos = 0;
|
||
|
|
var colorpos = 0;
|
||
|
|
var numConnected = 0;
|
||
|
|
|
||
|
|
for ( var i = 0; i < particleCount; i++ )
|
||
|
|
particlesData[ i ].numConnections = 0;
|
||
|
|
|
||
|
|
for ( var i = 0; i < particleCount; i++ ) {
|
||
|
|
|
||
|
|
// get the particle
|
||
|
|
var particleData = particlesData[i];
|
||
|
|
|
||
|
|
particlePositions[ i * 3 ] += particleData.velocity.x;
|
||
|
|
particlePositions[ i * 3 + 1 ] += particleData.velocity.y;
|
||
|
|
particlePositions[ i * 3 + 2 ] += particleData.velocity.z;
|
||
|
|
|
||
|
|
if ( particlePositions[ i * 3 + 1 ] < -rHalf || particlePositions[ i * 3 + 1 ] > rHalf )
|
||
|
|
particleData.velocity.y = -particleData.velocity.y;
|
||
|
|
|
||
|
|
if ( particlePositions[ i * 3 ] < -rHalf || particlePositions[ i * 3 ] > rHalf )
|
||
|
|
particleData.velocity.x = -particleData.velocity.x;
|
||
|
|
|
||
|
|
if ( particlePositions[ i * 3 + 2 ] < -rHalf || particlePositions[ i * 3 + 2 ] > rHalf )
|
||
|
|
particleData.velocity.z = -particleData.velocity.z;
|
||
|
|
|
||
|
|
if ( effectController.limitConnections && particleData.numConnections >= effectController.maxConnections )
|
||
|
|
continue;
|
||
|
|
|
||
|
|
// Check collision
|
||
|
|
for ( var j = i + 1; j < particleCount; j++ ) {
|
||
|
|
|
||
|
|
var particleDataB = particlesData[ j ];
|
||
|
|
if ( effectController.limitConnections && particleDataB.numConnections >= effectController.maxConnections )
|
||
|
|
continue;
|
||
|
|
|
||
|
|
var dx = particlePositions[ i * 3 ] - particlePositions[ j * 3 ];
|
||
|
|
var dy = particlePositions[ i * 3 + 1 ] - particlePositions[ j * 3 + 1 ];
|
||
|
|
var dz = particlePositions[ i * 3 + 2 ] - particlePositions[ j * 3 + 2 ];
|
||
|
|
var dist = Math.sqrt( dx * dx + dy * dy + dz * dz );
|
||
|
|
|
||
|
|
if ( dist < effectController.minDistance ) {
|
||
|
|
|
||
|
|
particleData.numConnections++;
|
||
|
|
particleDataB.numConnections++;
|
||
|
|
|
||
|
|
var alpha = 1.0 - dist / effectController.minDistance;
|
||
|
|
|
||
|
|
positions[ vertexpos++ ] = particlePositions[ i * 3 ];
|
||
|
|
positions[ vertexpos++ ] = particlePositions[ i * 3 + 1 ];
|
||
|
|
positions[ vertexpos++ ] = particlePositions[ i * 3 + 2 ];
|
||
|
|
|
||
|
|
positions[ vertexpos++ ] = particlePositions[ j * 3 ];
|
||
|
|
positions[ vertexpos++ ] = particlePositions[ j * 3 + 1 ];
|
||
|
|
positions[ vertexpos++ ] = particlePositions[ j * 3 + 2 ];
|
||
|
|
|
||
|
|
colors[ colorpos++ ] = alpha;
|
||
|
|
colors[ colorpos++ ] = alpha;
|
||
|
|
colors[ colorpos++ ] = alpha;
|
||
|
|
|
||
|
|
colors[ colorpos++ ] = alpha;
|
||
|
|
colors[ colorpos++ ] = alpha;
|
||
|
|
colors[ colorpos++ ] = alpha;
|
||
|
|
|
||
|
|
numConnected++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
linesMesh.geometry.drawcalls[ 0 ].count = numConnected * 2;
|
||
|
|
linesMesh.geometry.attributes.position.needsUpdate = true;
|
||
|
|
linesMesh.geometry.attributes.color.needsUpdate = true;
|
||
|
|
|
||
|
|
pointCloud.geometry.attributes.position.needsUpdate = true;
|
||
|
|
|
||
|
|
requestAnimationFrame( animate );
|
||
|
|
|
||
|
|
stats.update();
|
||
|
|
render();
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function render() {
|
||
|
|
|
||
|
|
var time = Date.now() * 0.001;
|
||
|
|
|
||
|
|
group.rotation.y = time * 0.1;
|
||
|
|
renderer.render( scene, camera );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
</script>
|
||
|
|
</body>
|
||
|
|
</html>
|