mirror of
https://github.com/Doodle3D/Doodle3D-Slicer.git
synced 2024-11-22 21:47:59 +01:00
687 lines
16 KiB
HTML
Executable File
687 lines
16 KiB
HTML
Executable File
<!DOCTYPE html>
|
|
<html lang="en">
|
|
<head>
|
|
<title>three.js webgl - gpgpu - flocking</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 {
|
|
background-color: #ffffff;
|
|
margin: 0px;
|
|
overflow: hidden;
|
|
font-family:Monospace;
|
|
font-size:13px;
|
|
text-align:center;
|
|
text-align:center;
|
|
cursor: pointer;
|
|
}
|
|
|
|
a {
|
|
color:#0078ff;
|
|
}
|
|
|
|
#info {
|
|
color: #000;
|
|
position: absolute;
|
|
top: 10px;
|
|
width: 100%;
|
|
}
|
|
|
|
</style>
|
|
</head>
|
|
<body>
|
|
|
|
<div id="info">
|
|
<a href="http://threejs.org" target="_blank">three.js</a> - <span id="birds"></span> webgl gpgpu birds<br/>
|
|
Select <span id="options"></span> birds<br/>
|
|
Move mouse to disturb birds.
|
|
|
|
</div>
|
|
|
|
<script src="../build/three.min.js"></script>
|
|
<script src="js/Detector.js"></script>
|
|
<script src="js/libs/stats.min.js"></script>
|
|
<script src="js/libs/dat.gui.min.js"></script>
|
|
|
|
<script src="js/SimulationRenderer.js"></script>
|
|
|
|
<!--
|
|
TODO: If you're reading this, you may wish to improve this example by
|
|
- Create a better shading for the birds?
|
|
- Refactoring the SimulationRenderer to a more generic TextureRenderer / making the GPGPU workflow easier?
|
|
|
|
-->
|
|
|
|
|
|
|
|
<!-- pass through vertex shader -->
|
|
<script id="vertexShader" type="x-shader/x-vertex">
|
|
|
|
void main() {
|
|
|
|
gl_Position = vec4( position, 1.0 );
|
|
|
|
}
|
|
|
|
</script>
|
|
|
|
<!-- pass through fragment shader -->
|
|
<script id="fragmentShader" type="x-shader/x-fragment">
|
|
|
|
uniform vec2 resolution;
|
|
uniform float time;
|
|
uniform sampler2D texture;
|
|
|
|
void main() {
|
|
|
|
vec2 uv = gl_FragCoord.xy / resolution.xy;
|
|
|
|
vec3 color = texture2D( texture, uv ).xyz;
|
|
|
|
gl_FragColor = vec4( color, 1.0 );
|
|
|
|
}
|
|
|
|
</script>
|
|
<!-- end pass through shaders -->
|
|
|
|
<!-- shader for bird's position -->
|
|
<script id="fragmentShaderPosition" type="x-shader/x-fragment">
|
|
|
|
uniform vec2 resolution;
|
|
uniform float time;
|
|
uniform float delta;
|
|
uniform sampler2D textureVelocity;
|
|
uniform sampler2D texturePosition;
|
|
|
|
void main() {
|
|
|
|
vec2 uv = gl_FragCoord.xy / resolution.xy;
|
|
vec4 tmpPos = texture2D( texturePosition, uv );
|
|
vec3 position = tmpPos.xyz;
|
|
vec3 velocity = texture2D( textureVelocity, uv ).xyz;
|
|
|
|
float phase = tmpPos.w;
|
|
|
|
phase = mod( ( phase + delta +
|
|
length( velocity.xz ) * delta * 3. +
|
|
max( velocity.y, 0.0 ) * delta * 6. ), 62.83 );
|
|
|
|
gl_FragColor = vec4( position + velocity * delta * 15. , phase );
|
|
|
|
}
|
|
|
|
</script>
|
|
|
|
<!-- shader for bird's velocity -->
|
|
<script id="fragmentShaderVelocity" type="x-shader/x-fragment">
|
|
|
|
uniform vec2 resolution;
|
|
uniform float time;
|
|
uniform float testing;
|
|
uniform float delta; // about 0.016
|
|
uniform float seperationDistance; // 20
|
|
uniform float alignmentDistance; // 40
|
|
uniform float cohesionDistance; //
|
|
uniform float freedomFactor;
|
|
uniform vec3 predator;
|
|
|
|
|
|
uniform sampler2D textureVelocity;
|
|
uniform sampler2D texturePosition;
|
|
|
|
const float width = WIDTH;
|
|
const float height = WIDTH;
|
|
|
|
const float PI = 3.141592653589793;
|
|
const float PI_2 = PI * 2.0;
|
|
// const float VISION = PI * 0.55;
|
|
|
|
float zoneRadius = 40.0;
|
|
float zoneRadiusSquared = zoneRadius * zoneRadius;
|
|
|
|
float separationThresh = 0.45;
|
|
float alignmentThresh = 0.65;
|
|
|
|
const float UPPER_BOUNDS = 400.0;
|
|
const float LOWER_BOUNDS = -UPPER_BOUNDS;
|
|
|
|
const float SPEED_LIMIT = 9.0;
|
|
|
|
float rand(vec2 co){
|
|
return fract(sin(dot(co.xy ,vec2(12.9898,78.233))) * 43758.5453);
|
|
}
|
|
|
|
void main() {
|
|
|
|
zoneRadius = seperationDistance + alignmentDistance + cohesionDistance;
|
|
separationThresh = seperationDistance / zoneRadius;
|
|
alignmentThresh = ( seperationDistance + alignmentDistance ) / zoneRadius;
|
|
zoneRadiusSquared = zoneRadius * zoneRadius;
|
|
|
|
|
|
vec2 uv = gl_FragCoord.xy / resolution.xy;
|
|
vec3 birdPosition, birdVelocity;
|
|
|
|
vec3 selfPosition = texture2D( texturePosition, uv ).xyz;
|
|
vec3 selfVelocity = texture2D( textureVelocity, uv ).xyz;
|
|
|
|
float dist;
|
|
vec3 dir; // direction
|
|
float distSquared;
|
|
|
|
float seperationSquared = seperationDistance * seperationDistance;
|
|
float cohesionSquared = cohesionDistance * cohesionDistance;
|
|
|
|
float f;
|
|
float percent;
|
|
|
|
vec3 velocity = selfVelocity;
|
|
|
|
float limit = SPEED_LIMIT;
|
|
|
|
dir = predator * UPPER_BOUNDS - selfPosition;
|
|
dir.z = 0.;
|
|
// dir.z *= 0.6;
|
|
dist = length( dir );
|
|
distSquared = dist * dist;
|
|
|
|
float preyRadius = 150.0;
|
|
float preyRadiusSq = preyRadius * preyRadius;
|
|
|
|
|
|
// move birds away from predator
|
|
if (dist < preyRadius) {
|
|
|
|
f = ( distSquared / preyRadiusSq - 1.0 ) * delta * 100.;
|
|
velocity += normalize( dir ) * f;
|
|
limit += 5.0;
|
|
}
|
|
|
|
|
|
// if (testing == 0.0) {}
|
|
// if ( rand( uv + time ) < freedomFactor ) {}
|
|
|
|
|
|
// Attract flocks to the center
|
|
vec3 central = vec3( 0., 0., 0. );
|
|
dir = selfPosition - central;
|
|
dist = length( dir );
|
|
|
|
dir.y *= 2.5;
|
|
velocity -= normalize( dir ) * delta * 5.;
|
|
|
|
for (float y=0.0;y<height;y++) {
|
|
for (float x=0.0;x<width;x++) {
|
|
|
|
vec2 ref = vec2( x + 0.5, y + 0.5 ) / resolution.xy;
|
|
birdPosition = texture2D( texturePosition, ref ).xyz;
|
|
|
|
dir = birdPosition - selfPosition;
|
|
dist = length(dir);
|
|
|
|
if (dist < 0.0001) continue;
|
|
|
|
distSquared = dist * dist;
|
|
|
|
if (distSquared > zoneRadiusSquared ) continue;
|
|
|
|
percent = distSquared / zoneRadiusSquared;
|
|
|
|
if ( percent < separationThresh ) { // low
|
|
|
|
// Separation - Move apart for comfort
|
|
f = (separationThresh / percent - 1.0) * delta;
|
|
velocity -= normalize(dir) * f;
|
|
|
|
} else if ( percent < alignmentThresh ) { // high
|
|
|
|
// Alignment - fly the same direction
|
|
float threshDelta = alignmentThresh - separationThresh;
|
|
float adjustedPercent = ( percent - separationThresh ) / threshDelta;
|
|
|
|
birdVelocity = texture2D( textureVelocity, ref ).xyz;
|
|
|
|
f = ( 0.5 - cos( adjustedPercent * PI_2 ) * 0.5 + 0.5 ) * delta;
|
|
velocity += normalize(birdVelocity) * f;
|
|
|
|
} else {
|
|
|
|
// Attraction / Cohesion - move closer
|
|
float threshDelta = 1.0 - alignmentThresh;
|
|
float adjustedPercent = ( percent - alignmentThresh ) / threshDelta;
|
|
|
|
f = ( 0.5 - ( cos( adjustedPercent * PI_2 ) * -0.5 + 0.5 ) ) * delta;
|
|
|
|
velocity += normalize(dir) * f;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// this make tends to fly around than down or up
|
|
// if (velocity.y > 0.) velocity.y *= (1. - 0.2 * delta);
|
|
|
|
// Speed Limits
|
|
if ( length( velocity ) > limit ) {
|
|
velocity = normalize( velocity ) * limit;
|
|
}
|
|
|
|
gl_FragColor = vec4( velocity, 1.0 );
|
|
|
|
}
|
|
|
|
</script>
|
|
|
|
<script type="x-shader/x-vertex" id="birdVS">
|
|
|
|
attribute vec2 reference;
|
|
attribute float birdVertex;
|
|
|
|
attribute vec3 birdColor;
|
|
|
|
uniform sampler2D texturePosition;
|
|
uniform sampler2D textureVelocity;
|
|
|
|
varying vec4 vColor;
|
|
varying float z;
|
|
|
|
uniform float time;
|
|
|
|
void main() {
|
|
|
|
vec4 tmpPos = texture2D( texturePosition, reference );
|
|
vec3 pos = tmpPos.xyz;
|
|
vec3 velocity = normalize(texture2D( textureVelocity, reference ).xyz);
|
|
|
|
vec3 newPosition = position;
|
|
|
|
if ( birdVertex == 4.0 || birdVertex == 7.0 ) {
|
|
// flap wings
|
|
newPosition.y = sin( tmpPos.w ) * 5.;
|
|
}
|
|
|
|
newPosition = mat3( modelMatrix ) * newPosition;
|
|
|
|
|
|
velocity.z *= -1.;
|
|
float xz = length( velocity.xz );
|
|
float xyz = 1.;
|
|
float x = sqrt( 1. - velocity.y * velocity.y );
|
|
|
|
float cosry = velocity.x / xz;
|
|
float sinry = velocity.z / xz;
|
|
|
|
float cosrz = x / xyz;
|
|
float sinrz = velocity.y / xyz;
|
|
|
|
mat3 maty = mat3(
|
|
cosry, 0, -sinry,
|
|
0 , 1, 0 ,
|
|
sinry, 0, cosry
|
|
|
|
);
|
|
|
|
mat3 matz = mat3(
|
|
cosrz , sinrz, 0,
|
|
-sinrz, cosrz, 0,
|
|
0 , 0 , 1
|
|
);
|
|
|
|
newPosition = maty * matz * newPosition;
|
|
newPosition += pos;
|
|
|
|
z = newPosition.z;
|
|
|
|
vColor = vec4( birdColor, 1.0 );
|
|
gl_Position = projectionMatrix * viewMatrix * vec4( newPosition, 1.0 );
|
|
}
|
|
|
|
</script>
|
|
|
|
<!-- bird geometry shader -->
|
|
<script type="x-shader/x-fragment" id="birdFS">
|
|
|
|
varying vec4 vColor;
|
|
varying float z;
|
|
|
|
uniform vec3 color;
|
|
|
|
void main() {
|
|
// Fake colors for now
|
|
float z2 = 0.2 + ( 1000. - z ) / 1000. * vColor.x;
|
|
gl_FragColor = vec4( z2, z2, z2, 1. );
|
|
|
|
}
|
|
|
|
</script>
|
|
|
|
|
|
<script>
|
|
|
|
if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
|
|
|
|
var hash = document.location.hash.substr( 1 );
|
|
if (hash) hash = parseInt(hash, 0);
|
|
|
|
/* TEXTURE WIDTH FOR SIMULATION */
|
|
var WIDTH = hash || 32;
|
|
|
|
var BIRDS = WIDTH * WIDTH;
|
|
|
|
// Custom Geometry - using 3 triangles each. No UVs, no normals currently.
|
|
THREE.BirdGeometry = function () {
|
|
|
|
var triangles = BIRDS * 3;
|
|
var points = triangles * 3;
|
|
|
|
THREE.BufferGeometry.call( this );
|
|
|
|
var vertices = new THREE.BufferAttribute( new Float32Array( points * 3 ), 3 );
|
|
var birdColors = new THREE.BufferAttribute( new Float32Array( points * 3 ), 3 );
|
|
var references = new THREE.BufferAttribute( new Float32Array( points * 2 ), 2 );
|
|
var birdVertex = new THREE.BufferAttribute( new Float32Array( points ), 1 );
|
|
|
|
this.addAttribute( 'position', vertices );
|
|
this.addAttribute( 'birdColor', birdColors );
|
|
this.addAttribute( 'reference', references );
|
|
this.addAttribute( 'birdVertex', birdVertex );
|
|
|
|
// this.addAttribute( 'normal', new Float32Array( points * 3 ), 3 );
|
|
|
|
|
|
var v = 0;
|
|
|
|
function verts_push() {
|
|
for (var i=0; i < arguments.length; i++) {
|
|
vertices.array[v++] = arguments[i];
|
|
}
|
|
}
|
|
|
|
var wingsSpan = 20;
|
|
|
|
for (var f = 0; f<BIRDS; f++ ) {
|
|
|
|
// Body
|
|
verts_push(
|
|
0, -0, -20,
|
|
0, 4, -20,
|
|
0, 0, 30
|
|
);
|
|
|
|
// Left Wing
|
|
verts_push(
|
|
0, 0, -15,
|
|
-wingsSpan, 0, 0,
|
|
0, 0, 15
|
|
);
|
|
|
|
// Right Wing
|
|
verts_push(
|
|
0, 0, 15,
|
|
wingsSpan, 0, 0,
|
|
0, 0, -15
|
|
);
|
|
|
|
}
|
|
|
|
for( var v = 0; v < triangles * 3; v++ ) {
|
|
|
|
var i = ~~(v / 3);
|
|
var x = (i % WIDTH) / WIDTH;
|
|
var y = ~~(i / WIDTH) / WIDTH;
|
|
|
|
var c = new THREE.Color(
|
|
0x444444 +
|
|
~~(v / 9) / BIRDS * 0x666666
|
|
);
|
|
|
|
birdColors.array[ v * 3 + 0 ] = c.r;
|
|
birdColors.array[ v * 3 + 1 ] = c.g;
|
|
birdColors.array[ v * 3 + 2 ] = c.b;
|
|
|
|
references.array[ v * 2 ] = x;
|
|
references.array[ v * 2 + 1 ] = y;
|
|
|
|
birdVertex.array[ v ] = v % 9;
|
|
|
|
}
|
|
|
|
this.applyMatrix( new THREE.Matrix4().makeScale( 0.2, 0.2, 0.2 ) );
|
|
|
|
}
|
|
|
|
THREE.BirdGeometry.prototype = Object.create( THREE.BufferGeometry.prototype );
|
|
|
|
|
|
var container, stats;
|
|
var camera, scene, renderer, geometry, i, h, color;
|
|
var mouseX = 0, mouseY = 0;
|
|
|
|
var windowHalfX = window.innerWidth / 2;
|
|
var windowHalfY = window.innerHeight / 2;
|
|
|
|
var PARTICLES = WIDTH * WIDTH;
|
|
var BOUNDS = 800, BOUNDS_HALF = BOUNDS / 2;
|
|
|
|
document.getElementById('birds').innerText = PARTICLES;
|
|
|
|
function change(n) {
|
|
location.hash = n;
|
|
location.reload();
|
|
return false;
|
|
}
|
|
|
|
|
|
var options = '';
|
|
for (i=1; i<7; i++) {
|
|
var j = Math.pow(2, i);
|
|
options += '<a href="#" onclick="return change(' + j + ')">' + (j * j) + '</a> ';
|
|
}
|
|
document.getElementById('options').innerHTML = options;
|
|
|
|
var last = performance.now();
|
|
|
|
var simulator;
|
|
|
|
init();
|
|
animate();
|
|
|
|
function init() {
|
|
|
|
container = document.createElement( 'div' );
|
|
document.body.appendChild( container );
|
|
|
|
camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 1, 3000 );
|
|
camera.position.z = 350;
|
|
|
|
scene = new THREE.Scene();
|
|
|
|
scene.fog = new THREE.Fog( 0xffffff, 100, 1000 );
|
|
|
|
renderer = new THREE.WebGLRenderer();
|
|
renderer.setClearColor( scene.fog.color );
|
|
renderer.setPixelRatio( window.devicePixelRatio );
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
|
container.appendChild( renderer.domElement );
|
|
|
|
simulator = new SimulationRenderer(WIDTH, renderer);
|
|
simulator.init();
|
|
|
|
stats = new Stats();
|
|
stats.domElement.style.position = 'absolute';
|
|
stats.domElement.style.top = '0px';
|
|
container.appendChild( stats.domElement );
|
|
|
|
document.addEventListener( 'mousemove', onDocumentMouseMove, false );
|
|
document.addEventListener( 'touchstart', onDocumentTouchStart, false );
|
|
document.addEventListener( 'touchmove', onDocumentTouchMove, false );
|
|
|
|
//
|
|
|
|
window.addEventListener( 'resize', onWindowResize, false );
|
|
|
|
|
|
|
|
var gui = new dat.GUI();
|
|
|
|
|
|
var effectController = {
|
|
seperation: 20.0,
|
|
alignment: 20.0,
|
|
cohesion: 20.0,
|
|
freedom: 0.75
|
|
};
|
|
|
|
var valuesChanger = function() {
|
|
|
|
simulator.velocityUniforms.seperationDistance.value = effectController.seperation;
|
|
simulator.velocityUniforms.alignmentDistance.value = effectController.alignment;
|
|
simulator.velocityUniforms.cohesionDistance.value = effectController.cohesion;
|
|
simulator.velocityUniforms.freedomFactor.value = effectController.freedom;
|
|
|
|
};
|
|
|
|
valuesChanger();
|
|
|
|
|
|
gui.add( effectController, "seperation", 0.0, 100.0, 1.0 ).onChange( valuesChanger );
|
|
gui.add( effectController, "alignment", 0.0, 100, 0.001 ).onChange( valuesChanger );
|
|
gui.add( effectController, "cohesion", 0.0, 100, 0.025 ).onChange( valuesChanger );
|
|
gui.close();
|
|
|
|
initBirds();
|
|
|
|
}
|
|
|
|
|
|
function initBirds() {
|
|
|
|
var geometry = new THREE.BirdGeometry();
|
|
|
|
// For Vertex Shaders
|
|
birdAttributes = {
|
|
// index: { type: 'i', value: [] },
|
|
birdColor: { type: 'c', value: null },
|
|
reference: { type: 'v2', value: null },
|
|
birdVertex: { type: 'f', value: null }
|
|
};
|
|
|
|
// For Vertex and Fragment
|
|
birdUniforms = {
|
|
|
|
color: { type: "c", value: new THREE.Color( 0xff2200 ) },
|
|
texturePosition: { type: "t", value: null },
|
|
textureVelocity: { type: "t", value: null },
|
|
time: { type: "f", value: 1.0 },
|
|
delta: { type: "f", value: 0.0 },
|
|
|
|
};
|
|
|
|
// ShaderMaterial
|
|
var shaderMaterial = new THREE.ShaderMaterial( {
|
|
|
|
uniforms: birdUniforms,
|
|
attributes: birdAttributes,
|
|
vertexShader: document.getElementById( 'birdVS' ).textContent,
|
|
fragmentShader: document.getElementById( 'birdFS' ).textContent,
|
|
side: THREE.DoubleSide
|
|
|
|
});
|
|
|
|
|
|
// var
|
|
birdMesh = new THREE.Mesh( geometry, shaderMaterial );
|
|
birdMesh.rotation.y = Math.PI / 2;
|
|
birdMesh.matrixAutoUpdate = false;
|
|
birdMesh.updateMatrix();
|
|
|
|
scene.add(birdMesh);
|
|
|
|
}
|
|
|
|
function onWindowResize() {
|
|
|
|
windowHalfX = window.innerWidth / 2;
|
|
windowHalfY = window.innerHeight / 2;
|
|
|
|
camera.aspect = window.innerWidth / window.innerHeight;
|
|
camera.updateProjectionMatrix();
|
|
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
|
|
|
}
|
|
|
|
function onDocumentMouseMove( event ) {
|
|
|
|
mouseX = event.clientX - windowHalfX;
|
|
mouseY = event.clientY - windowHalfY;
|
|
|
|
}
|
|
|
|
function onDocumentTouchStart( event ) {
|
|
|
|
if ( event.touches.length === 1 ) {
|
|
|
|
event.preventDefault();
|
|
|
|
mouseX = event.touches[ 0 ].pageX - windowHalfX;
|
|
mouseY = event.touches[ 0 ].pageY - windowHalfY;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function onDocumentTouchMove( event ) {
|
|
|
|
if ( event.touches.length === 1 ) {
|
|
|
|
event.preventDefault();
|
|
|
|
mouseX = event.touches[ 0 ].pageX - windowHalfX;
|
|
mouseY = event.touches[ 0 ].pageY - windowHalfY;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
//
|
|
|
|
function animate() {
|
|
|
|
requestAnimationFrame( animate );
|
|
|
|
render();
|
|
stats.update();
|
|
|
|
}
|
|
|
|
function render() {
|
|
|
|
var now = performance.now()
|
|
var delta = (now - last) / 1000;
|
|
|
|
if (delta > 1) delta = 1; // safety cap on large deltas
|
|
last = now;
|
|
|
|
birdUniforms.time.value = now;
|
|
birdUniforms.delta.value = delta;
|
|
|
|
simulator.simulate( delta );
|
|
simulator.velocityUniforms.predator.value.set( mouseX / windowHalfX, -mouseY / windowHalfY, 0 );
|
|
|
|
mouseX = 10000;
|
|
mouseY = 10000;
|
|
|
|
renderer.render( scene, camera );
|
|
|
|
}
|
|
|
|
</script>
|
|
</body>
|
|
</html>
|