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index.html
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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>WebXR - Particles</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<style>
body {
font-family: Monospace;
background-color: #000000;
margin: 0px;
overflow: hidden;
}
#info {
color: #ffffff;
font-family: Monospace;
font-size: 13px;
text-align: center;
font-weight: bold;
position: absolute;
top: 0px; width: 100%;
padding: 5px;
}
a {
color: #0040ff;
}
</style>
</head>
<body>
<!-- For Magic Leap Support -->
<script src="js/three/examples/jsm/vr/HelioWebXRPolyfill.js"></script>
<!-- WebGL 2 shaders -->
<script id="vs-particles-2" type="x-shader/x-vertex">
uniform float pointSize;
varying vec3 vPosition;
void main() {
vPosition = position;
gl_PointSize = pointSize;
gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
}
</script>
<script id="fs-particles-2" type="x-shader/x-fragment">
varying vec3 vPosition;
void main() {
float depth = smoothstep( 10.24, 1.0, gl_FragCoord.z / gl_FragCoord.w );
gl_FragColor = vec4( (vec3(0.0, 0.03, 0.05) + (vPosition * 0.25)), depth );
}
</script>
<script type="module">
import * as THREE from './js/three/build/three.module.js';
import { SimulationShader } from './js/SimulationShader.js';
import { Projector } from './js/three/examples/jsm/renderers/Projector.js';
import { GeometryUtils } from './js/three/examples/jsm/utils/GeometryUtils.js';
import { WEBVR } from './js/three/examples/jsm/vr/WebVR.js';
function getQueryString(name, defaultValue) {
var query = window.location.search.substring(1);
var vars = query.split("&");
for (var i = 0; i < vars.length; i++) {
var pair = vars[i].split("=");
if (pair[0] == name) {
return unescape(pair[1]);
}
}
return defaultValue;
}
function getQueryValue(name, defaultValue) {
var value = getQueryString(name, null);
if (value == null) {
return defaultValue;
}
return parseInt(value, 10);
}
var roomSize = new THREE.Vector3(3, 3, 3);
var textScale = 0.3;
var container, canvas, gl;
var scene, camera, light, renderer;
var geometry, geometry2, originGeometry, cube, mesh, material;
var roomMesh;
var projector = new Projector();
var data, texture, points;
var transformFeedback;
var originBuffer;
var font;
var fboParticles, rtTexturePos, rtTexturePos2, simulationShader;
var particleCount = getQueryValue('particleCount', 100000);
var pointSize = getQueryValue('pointSize', 2);
var skipRemainder = getQueryValue('skipRemainder', 0);
var INT_MAX = 2147483647;
var maxColliders = 8;
var pickCoord = new THREE.Vector3(0.0, 0.0, 0.0);
var pickRay = new THREE.Ray();
var clickPlane = new THREE.Plane(new THREE.Vector3(0.0, 0.0, 1.0), roomSize.z*0.25);
var mouseCoordQueue = [];
var touchPoints = [];
var colliders = new Float32Array(maxColliders * 4);
var colliderMeshes = [];
var showColliders = false;
const CONTROLLER_COLLIDER_SIZE = 0.075;
var controller1, controller2;
var controllerMesh1, controllerMesh2;
var isWebGL2 = false;
function getFullscreenButton ( renderer ) {
var button = document.createElement( 'button' );
button.style.position = 'absolute';
button.style.right = '20px';
button.style.bottom = '20px';
button.style.width = '100px';
button.style.border = '0';
button.style.padding = '8px';
button.style.cursor = 'pointer';
button.style.backgroundColor = '#000';
button.style.color = '#fff';
button.style.fontFamily = 'sans-serif';
button.style.fontSize = '13px';
button.style.fontStyle = 'normal';
button.style.textAlign = 'center';
button.style.zIndex = '999';
button.textContent = 'FULLSCREEN';
button.onclick = function() {
if (renderer.domElement.requestFullscreen) {
renderer.domElement.requestFullscreen();
} else if (renderer.domElement.webkitRequestFullscreen) {
renderer.domElement.webkitRequestFullscreen();
} else if (renderer.domElement.mozRequestFullScreen) {
renderer.domElement.mozRequestFullScreen();
}
};
return button;
}
function inAR() {
if (!('getSession' in renderer.vr)) {
return false;
}
let session = renderer.vr.getSession();
return session && session.environmentBlendMode && session.environmentBlendMode != 'opaque';
}
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
canvas = document.createElement( 'canvas' );
// Try creating a WebGL 2 context first
gl = canvas.getContext( 'webgl2', { antialias: false, xrCompatible: true } );
if (!gl) {
gl = canvas.getContext( 'experimental-webgl2', { antialias: false, xrCompatible: true } );
}
isWebGL2 = !!gl;
renderer = new THREE.WebGLRenderer( { canvas: canvas, context: gl } );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.sortObjects = false;
renderer.vr.enabled = true;
container.appendChild( renderer.domElement );
document.body.appendChild( getFullscreenButton( renderer ) );
let btnVR = WEBVR.createButton(
renderer, {
mode: 'immersive-vr',
sessionInit: {requiredFeatures: ['local-floor']}
});
btnVR.style.left = 'calc(50% - 110px)';
document.body.appendChild(btnVR);
let btnAR = WEBVR.createButton(
renderer, {
mode: 'immersive-ar',
sessionInit: {requiredFeatures: ['local-floor']}
});
btnAR.style.left = 'calc(50% + 10px)';
document.body.appendChild(btnAR);
scene = new THREE.Scene();
camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 0.01, roomSize.z * 10 );
camera.position.y = (roomSize.y/2) + 0.25;
camera.position.z = roomSize.z*0.2;
camera.lookAt( new THREE.Vector3(0, roomSize.y/2, -roomSize.z*0.25));
scene.add( camera );
controller1 = renderer.vr.getController( 0 );
scene.add( controller1 );
controller2 = renderer.vr.getController( 1 );
scene.add( controller2 );
var controllerMaterial = new THREE.MeshPhongMaterial({ color: 0x00DD22 });
var controllerGeometry = new THREE.IcosahedronGeometry(CONTROLLER_COLLIDER_SIZE, 1);
controllerMesh1 = new THREE.Mesh(controllerGeometry, controllerMaterial);
controllerMesh2 = new THREE.Mesh(controllerGeometry, controllerMaterial);
controller1.add( controllerMesh1 );
controller2.add( controllerMesh2 );
var fingerMaterial = new THREE.MeshPhongMaterial({ color: 0x00DD22 });
var fingerGeometry = new THREE.IcosahedronGeometry(1, 2);
showColliders = getQueryValue('colliders', 0) != 0;
for (var i = 0; i < maxColliders; ++i) {
colliderMeshes[i] = new THREE.Mesh(fingerGeometry, fingerMaterial);
scene.add(colliderMeshes[i]);
}
var textureLoader = new THREE.TextureLoader();
var backImage = textureLoader.load("media/textures/Back.png");
var ceilImage = textureLoader.load("media/textures/Ceiling.png");
var floorImage = textureLoader.load("media/textures/Floor.png");
var roomMaterialArray = [
new THREE.MeshBasicMaterial({ map: backImage, side: THREE.BackSide }),
new THREE.MeshBasicMaterial({ map: backImage, side: THREE.BackSide }),
new THREE.MeshBasicMaterial({ map: ceilImage, side: THREE.BackSide }),
new THREE.MeshBasicMaterial({ map: floorImage, side: THREE.BackSide }),
new THREE.MeshBasicMaterial({ map: backImage, side: THREE.BackSide }),
new THREE.MeshBasicMaterial({ map: backImage, side: THREE.BackSide })
];
var roomGeometry = new THREE.BoxGeometry( roomSize.x, roomSize.y, roomSize.z );
roomMesh = new THREE.Mesh( roomGeometry, roomMaterialArray );
roomMesh.doubleSided = true;
roomMesh.position.y = roomSize.y/2;
scene.add( roomMesh );
renderer.vr.addEventListener('sessionstart', (ev) => {
// Hide the room mesh if we're in an AR device.
if (inAR()) {
roomMesh.visible = false;
controllerMesh1.visible = false;
controllerMesh2.visible = false;
} else {
controllerMesh1.visible = true;
controllerMesh2.visible = true;
}
});
renderer.vr.addEventListener('sessionend', (ev) => {
roomMesh.visible = true;
controllerMesh1.visible = false;
controllerMesh2.visible = false;
});
if (isWebGL2) {
// Start Creation of DataTexture
var fontLoader = new THREE.FontLoader();
fontLoader.load( 'media/fonts/helvetiker_bold.typeface.json', function ( font ) {
var textGeo = new THREE.TextGeometry( "WebXR!", {
size: 0.7,
height: 0.25,
curveSegments: 0,
font: font,
weight: "bold",
style: "normal",
});
textGeo.computeBoundingBox();
var bounds = textGeo.boundingBox;
textGeo.applyMatrix( new THREE.Matrix4().makeTranslation(
(bounds.max.x - bounds.min.x) * -0.5,
(bounds.max.y - bounds.min.y) * -0.5,
(bounds.max.z - bounds.min.z) * -0.5));
// THREE.js BUG FIX
particleCount = Math.floor(particleCount / 3) * 3;
points = GeometryUtils.randomPointsInGeometry( textGeo, particleCount );
data = new Float32Array( particleCount * 4 );
for ( var i = 0, j = 0, l = data.length; i < l; i += 4, j += 1 ) {
data[ i ] = points[ j ].x;
data[ i + 1 ] = points[ j ].y;
data[ i + 2 ] = points[ j ].z;
data[ i + 3 ] = 0.0;
}
var velData = new Float32Array( particleCount * 4 );
for ( var i = 0, l = velData.length; i < l; i += 4 ) {
velData[ i ] = (Math.random() - 0.5) * 0.004;
velData[ i + 1 ] = (Math.random() - 0.5) * 0.004;
velData[ i + 2 ] = (Math.random() - 0.5) * 0.004;
velData[ i + 3 ] = 0.0;
}
var randomSeedData = new Uint32Array( particleCount );
for ( var i = 0; i < randomSeedData.length; ++i ) {
randomSeedData[ i ] = Math.random() * INT_MAX;
}
geometry = new THREE.BufferGeometry();
geometry.addAttribute( 'position', new THREE.BufferAttribute( data, 4 ).setDynamic( true ) );
geometry.addAttribute( 'velocity', new THREE.BufferAttribute( velData, 4 ).setDynamic( true ) );
geometry.addAttribute( 'randomSeed', new THREE.BufferAttribute( randomSeedData, 1, false, true ).setDynamic( true ) );
geometry2 = geometry.clone();
material = new THREE.ShaderMaterial( {
uniforms: {
"pointSize": { type: "f", value: pointSize }
},
vertexShader: document.getElementById( 'vs-particles-2' ).textContent,
fragmentShader: document.getElementById( 'fs-particles-2' ).textContent,
blending: THREE.AdditiveBlending,
depthWrite: false,
depthTest: true,
transparent: true
} );
transformFeedback = gl.createTransformFeedback();
originBuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, originBuffer);
gl.bufferData(gl.ARRAY_BUFFER, data, gl.STATIC_DRAW);
simulationShader = new SimulationShader(renderer, maxColliders);
simulationShader.setColliders(colliders);
mesh = new THREE.Points(geometry, material);
mesh.position.z = -roomSize.z*0.25;
mesh.position.y = roomSize.y/2;
// Should probably be linked to the room size somehow.
mesh.scale.set(textScale, textScale, textScale);
scene.add(mesh);
} );
}
function onMouseUpdate(ev) {
let mouseDown = !!ev.buttons;
if (mouseDown) {
mouseCoordQueue.push(canvasToColliderVector(ev.clientX, ev.clientY));
}
}
canvas.addEventListener( 'mousedown', onMouseUpdate, false )
canvas.addEventListener( 'mouseup', onMouseUpdate, false );
canvas.addEventListener( 'mousemove', onMouseUpdate, false );
function onTouchUpdate(ev) {
var touches = ev.touches;
for(var i = 0; i < touches.length; ++i) {
var touch = touches[i];
touchPoints.push(canvasToColliderVector(touch.clientX, touch.clientY));
}
ev.preventDefault();
}
canvas.addEventListener( 'touchstart', onTouchUpdate, false )
canvas.addEventListener( 'touchend', onTouchUpdate, false );
canvas.addEventListener( 'touchmove', onTouchUpdate, false );
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
}
window.addEventListener( 'resize', onWindowResize, false );
function canvasToColliderVector(x, y) {
pickCoord.x = ((x / canvas.clientWidth) * 2.0) - 1.0;
pickCoord.y = -((y / canvas.clientHeight) * 2.0) + 1.0;
pickCoord.z = 0.1;
pickCoord.unproject(camera);
pickRay.set(camera.position, pickCoord.sub(camera.position).normalize());
var point = new THREE.Vector3();
pickRay.intersectPlane(clickPlane, point);
return point;
}
function vrCameraToColliderVector() {
pickCoord.x = 0;
pickCoord.y = 0;
pickCoord.z = 0.1;
pickCoord.unproject(vrCamera);
//vrCamera.getWorldDirection(pickCoord);
//pickCoord.unproject(vrCamera);
pickRay.set(vrCamera.position, pickCoord.sub(vrCamera.position).normalize());
var point = new THREE.Vector3();
pickRay.intersectPlane(clickPlane, point);
return point;
}
function pointToCollider(index, active, vector, size) {
var o = index * 4;
if (index >= maxColliders)
return;
if (active) {
colliders[o] = (vector.x - mesh.position.x) / textScale;
colliders[o+1] = (vector.y - mesh.position.y) / textScale;
colliders[o+2] = (vector.z - mesh.position.z) / textScale;
}
colliders[o+3] = active ? (size / textScale) : -1;
colliderMeshes[index].visible = active && showColliders;
if (active) {
colliderMeshes[index].position.x = vector.x;
colliderMeshes[index].position.y = vector.y;
colliderMeshes[index].position.z = vector.z;
colliderMeshes[index].scale.set(size, size, size);
}
}
function updateColliders() {
var fi = 0;
while (mouseCoordQueue.length) {
pointToCollider(fi, true, mouseCoordQueue.shift(), 0.05);
fi++;
}
while (touchPoints.length) {
pointToCollider(fi, true, touchPoints.shift(), 0.05);
fi++;
}
var vector = new THREE.Vector3();
vector.setFromMatrixPosition( controller1.matrixWorld );
pointToCollider(fi++, true, vector, CONTROLLER_COLLIDER_SIZE);
vector.setFromMatrixPosition( controller2.matrixWorld );
pointToCollider(fi++, true, vector, CONTROLLER_COLLIDER_SIZE);
/*var buttonPushed = false;
var gamepads = navigator.getGamepads();
for (var i = 0; i < gamepads.length; ++i) {
var gamepad = gamepads[i];
if (gamepad && gamepad.buttons[0].pressed) {
buttonPushed = true;
}
}
if (buttonPushed) {
var gazePoint = vrCameraToColliderVector();
if (gazePoint) {
pointToCollider(fi++, true, gazePoint, 0.075);
}
}*/
// Turn off any remaining colliders.
for (; fi < maxColliders; ++fi) {
pointToCollider(fi, false);
}
}
function transformFeedbackPass( gl, shader, source, target ) {
if (!source || !target)
return;
var sourcePosAttrib = source.attributes['position'];
var sourceVelAttrib = source.attributes['velocity'];
var sourceRandomSeedAttrib = source.attributes['randomSeed'];
var targetPosAttrib = target.attributes['position'];
var targetVelAttrib = target.attributes['velocity'];
var targetRandomSeedAttrib = target.attributes['randomSeed'];
function getWebGLBuffer(attribute) {
let webglBuffer = renderer.attributes.get(attribute);
if (webglBuffer) {
return webglBuffer.buffer;
}
return null;
}
var sourcePosBuffer = getWebGLBuffer(sourcePosAttrib);
var sourceVelBuffer = getWebGLBuffer(sourceVelAttrib);
var sourceRandomSeedBuffer = getWebGLBuffer(sourceRandomSeedAttrib);
var targetPosBuffer = getWebGLBuffer(targetPosAttrib);
var targetVelBuffer = getWebGLBuffer(targetVelAttrib);
var targetRandomSeedBuffer = getWebGLBuffer(targetRandomSeedAttrib);
if (targetPosBuffer && sourcePosBuffer) {
shader.bind();
gl.enableVertexAttribArray( shader.attributes.position );
gl.bindBuffer(gl.ARRAY_BUFFER, sourcePosBuffer);
gl.vertexAttribPointer( shader.attributes.position, 4, gl.FLOAT, false, 16, 0 );
gl.enableVertexAttribArray( shader.attributes.velocity );
gl.bindBuffer(gl.ARRAY_BUFFER, sourceVelBuffer);
gl.vertexAttribPointer( shader.attributes.velocity, 4, gl.FLOAT, false, 16, 0 );
gl.enableVertexAttribArray( shader.attributes.origin );
gl.bindBuffer(gl.ARRAY_BUFFER, originBuffer);
gl.vertexAttribPointer( shader.attributes.origin, 4, gl.FLOAT, false, 16, 0 );
gl.enableVertexAttribArray( shader.attributes.randomSeed );
gl.bindBuffer(gl.ARRAY_BUFFER, sourceRandomSeedBuffer);
gl.vertexAttribIPointer( shader.attributes.randomSeed, 1, gl.UNSIGNED_INT, 0, 0 );
gl.bindTransformFeedback(gl.TRANSFORM_FEEDBACK, transformFeedback);
gl.bindBufferBase(gl.TRANSFORM_FEEDBACK_BUFFER, 0, targetPosBuffer);
gl.bindBufferBase(gl.TRANSFORM_FEEDBACK_BUFFER, 1, targetVelBuffer);
gl.bindBufferBase(gl.TRANSFORM_FEEDBACK_BUFFER, 2, targetRandomSeedBuffer);
gl.enable(gl.RASTERIZER_DISCARD);
gl.beginTransformFeedback(gl.POINTS);
gl.drawArrays(gl.POINTS, 0, sourcePosAttrib.count /* sourcePosAttrib.itemSize*/);
gl.endTransformFeedback();
gl.disable(gl.RASTERIZER_DISCARD);
// Unbind the transform feedback buffer so subsequent attempts
// to bind it to ARRAY_BUFFER work.
gl.bindBufferBase(gl.TRANSFORM_FEEDBACK_BUFFER, 0, null);
gl.bindBufferBase(gl.TRANSFORM_FEEDBACK_BUFFER, 1, null);
gl.bindBufferBase(gl.TRANSFORM_FEEDBACK_BUFFER, 2, null);
gl.bindTransformFeedback(gl.TRANSFORM_FEEDBACK, null);
// Avoid messing with THREE.js's WebGL state
renderer.state.reset();
// TODO(kbr): Further Diagnosis
//gl.disableVertexAttribArray( shader.attributes.position );
//gl.disableVertexAttribArray( shader.attributes.velocity );
//gl.disableVertexAttribArray( shader.attributes.origin );
gl.disableVertexAttribArray( shader.attributes.randomSeed );
//gl.bindBuffer(gl.ARRAY_BUFFER, null);
}
}
var frameId = 0;
var fixedStep = 16.666666;
var remainder = 0;
function render(t) {
if (isWebGL2 && mesh) {
updateColliders();
var lastTime = simulationShader.getTime(t);
if (t - lastTime > fixedStep * 5) {
simulationShader.setTime(t);
lastTime = t - fixedStep;
}
while (remainder + t - lastTime >= fixedStep) {
lastTime += fixedStep;
simulationShader.setTime(lastTime);
if ( frameId % 2 === 0 ) {
transformFeedbackPass( renderer.getContext(), simulationShader, geometry2, geometry );
mesh.geometry = geometry2;
} else {
transformFeedbackPass( renderer.getContext(), simulationShader, geometry, geometry2 );
mesh.geometry = geometry;
}
frameId++;
}
material.uniforms.pointSize.value = inAR() ? pointSize * 2.0 : pointSize;
// Ugly hack to make the particle mesh always draw last
scene.remove( mesh ); scene.add( mesh );
// Unless asked not to, accumulate the remainder of time for the next frame.
// Flag acts as a sort of regression test for http://crbug.com/883871 .
if (!skipRemainder)
remainder = t - lastTime;
// If requestAnimationFrame timestamp jumps a lot, reset it.
simulationShader.setTime(t);
}
renderer.render( scene, camera );
}
init();
renderer.setAnimationLoop( render );
</script>
</body>
</html>