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flow.html
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flow.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - path flow</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 {
font-family: Monospace;
background-color: #f0f0f0;
margin: 0px;
overflow: hidden;
}
#info {
position: absolute;
top: 0px;
width: 100%;
padding: 5px;
font-family: Monospace;
font-size: 13px;
text-align:center;
}
#footer {
position: absolute;
bottom: 0px;
width: 100%;
padding: 5px;
font-family: Monospace;
font-size: 13px;
text-align:center;
}
#gif_container { display: none; }
</style>
</head>
<body>
<div id="container"></div>
<div id="info">
<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - path flow aka curve modifier
</div>
<div id="footer">
<div id="gif_container">
<div id="gif_status"></div>
<progress id="gif_progress" value="0" max="100"></progress>
<a href="" target="_blank" id="gif_download">Download gif</a>
</div>
</div>
<script src="three.js"></script>
<script src="DragControls.js"></script>
<script src="OrbitControls.js"></script>
<script src="TransformControls.js"></script>
<script src="loader.js"></script>
<script src="OBJLoader.js"></script>
<script src="flow.js"></script>
<script src="stats.min.js"></script>
<script src="dat.gui.min.js"></script>
<script src="gif/gif.js"></script>
<script>
var BITS = 3;
var TEXTURE_WIDTH = 256; // points on the texture
var orca;
var texture;
var uniforms;
var bufferUniforms = {};
var modifierObject = new THREE.Object3D();
var referenceGeometry = new THREE.Geometry();
referenceGeometry.vertices = Array(2).fill().map(_ => new THREE.Vector3());
var container, stats;
var camera, scene, renderer;
var splineHelperObjects = [], splineOutline;
var splinePointsLength = 4;
var positions = [];
var options;
var boxGeometry = new THREE.BoxGeometry( 20, 20, 20 );
var transformControl;
var ARC_SEGMENTS = 200;
var splineMesh;
var splines = {};
var params = {
path: 0,
flow: true,
/**/
uniform: false,
tension: 0.5,
centripetal: true,
chordal: false,
addPoint: addPoint,
removePoint: removePoint,
exportSpline: exportSpline,
closed: true,
play: true,
scale: 50,
rotationX: 0,
rotationY: 0.5,
rotationZ: 0,
translateX: 0,
translateY: 0,
translateZ: 0,
wireframe: false,
makeGif: makeGif
};
var gif_container, gif_status, gif_progress, gif_download;
init();
animate();
function init() {
container = document.getElementById( 'container' );
scene = new THREE.Scene();
scene.background = new THREE.Color( 0xf0f0f0 );
camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 10000 );
camera.position.set( 0, 250, 1000 );
scene.add( camera );
// scene.add( new THREE.AmbientLight( 0x303030 ) );
// Spotlight. TODO fix shadowmaps with
// THREE.MeshDepthMaterial
// var light = new THREE.SpotLight( 0xffffff, 1.5 );
// light.position.set( 0, 1500, 200 );
// light.castShadow = true;
// light.shadow = new THREE.LightShadow( new THREE.PerspectiveCamera( 70, 1, 200, 2000 ) );
// light.shadow.bias = -0.000222;
// light.shadow.mapSize.width = 1024;
// light.shadow.mapSize.height = 1024;
// scene.add( light );
// 3 point lighting
keyLight = new THREE.DirectionalLight(0xffffff, 1.0);
keyLight.position.set(-100, 0, 100);
fillLight = new THREE.DirectionalLight(0xffffff, 0.75);
fillLight.position.set(100, 0, 100);
backLight = new THREE.DirectionalLight(0xffffff, 1.0);
backLight.position.set(100, 0, -100).normalize();
scene.add(keyLight);
scene.add(fillLight);
scene.add(backLight);
var planeGeometry = new THREE.PlaneGeometry( 2000, 2000 );
planeGeometry.rotateX( - Math.PI / 2 );
var planeMaterial = new THREE.ShadowMaterial( { opacity: 0.2 } );
var plane = new THREE.Mesh( planeGeometry, planeMaterial );
plane.position.y = -200;
plane.receiveShadow = true;
scene.add( plane );
var helper = new THREE.GridHelper( 2000, 100 );
helper.position.y = - 199;
helper.material.opacity = 0.25;
helper.material.transparent = true;
scene.add( helper );
//var axes = new THREE.AxesHelper( 1000 );
//axes.position.set( - 500, - 500, - 500 );
//scene.add( axes );
renderer = new THREE.WebGLRenderer( { antialias: false } );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.shadowMap.enabled = true;
container.appendChild( renderer.domElement );
stats = new Stats();
container.appendChild( stats.dom );
gui = new dat.GUI();
gui.add( params, 'play' );
gui.add( params, 'flow' ).onChange( v => {
updateUniform( 'flow', v );
} );
// gui.add( params, 'tension', 0, 1 ).step( 0.01 ).onChange( function( value ) {
// splines.uniform.tension = value;
// splines.centripetal.tension = value;
// updateSplineOutline();
// });
// gui.add( params, 'centripetal' );
// gui.add( params, 'chordal' );
// gui.add( params, 'closed' ).onChange((v) => {
// splines.centripetal.closed = v;
// })
gui.add( params, 'path', 0, 1 ).step( 0.01 ).onChange( function( value ) {
updateUniform('pathOffset', value);
});
gui.add( params, 'addPoint' );
gui.add( params, 'removePoint' );
gui.add( params, 'exportSpline' );
gui.add( params, 'scale', 0.1, 400 ).step( 0.01 ).onChange( updateModel );
gui.add( params, 'rotationX', -1, 1 ).step( 0.25 ).onChange( updateModel );
gui.add( params, 'rotationY', -1, 1 ).step( 0.25 ).onChange( updateModel );
gui.add( params, 'rotationZ', -1, 1 ).step( 0.25 ).onChange( updateModel );
gui.add( params, 'translateX', -1000, 1000 ).step( 0.01 ).onChange( updateModel );
gui.add( params, 'translateY', -1000, 1000 ).step( 0.01 ).onChange( updateModel );
gui.add( params, 'translateZ', -1000, 1000 ).step( 0.01 ).onChange( updateModel );
gui.add( params, 'wireframe' ).onChange( updateModel );
gui.add( params, 'makeGif' );
gui.open();
// Controls
var controls = new THREE.OrbitControls( camera, renderer.domElement );
controls.damping = 0.2;
controls.addEventListener( 'change', render );
controls.addEventListener( 'start', function() {
cancelHideTransorm();
} );
controls.addEventListener( 'end', function() {
delayHideTransform();
} );
transformControl = new THREE.TransformControls( camera, renderer.domElement );
transformControl.addEventListener( 'change', render );
scene.add( transformControl );
// Hiding transform situation is a little in a mess :()
transformControl.addEventListener( 'change', function( e ) {
cancelHideTransorm();
} );
transformControl.addEventListener( 'mouseDown', function( e ) {
cancelHideTransorm();
} );
transformControl.addEventListener( 'mouseUp', function( e ) {
delayHideTransform();
} );
transformControl.addEventListener( 'objectChange', function( e ) {
updateSplineOutline();
} );
var dragcontrols = new THREE.DragControls( splineHelperObjects, camera, renderer.domElement ); //
dragcontrols.enabled = false;
dragcontrols.addEventListener( 'hoveron', function ( event ) {
transformControl.attach( event.object );
cancelHideTransorm();
} );
dragcontrols.addEventListener( 'hoveroff', function ( event ) {
delayHideTransform();
} );
var hiding;
function delayHideTransform() {
cancelHideTransorm();
hideTransform();
}
function hideTransform() {
hiding = setTimeout( function() {
transformControl.detach( transformControl.object );
}, 2500 )
}
function cancelHideTransorm() {
if ( hiding ) clearTimeout( hiding );
}
/*******
* Curves
*********/
for ( var i = 0; i < splinePointsLength; i ++ ) {
addSplineObject( positions[ i ] );
}
positions = [];
for ( var i = 0; i < splinePointsLength; i ++ ) {
positions.push( splineHelperObjects[ i ].position );
}
var geometry = new THREE.Geometry();
for ( var i = 0; i < ARC_SEGMENTS; i ++ ) {
geometry.vertices.push( new THREE.Vector3() );
}
var curve = new THREE.CatmullRomCurve3( positions );
curve.curveType = 'catmullrom';
curve.mesh = new THREE.Line( geometry.clone(), new THREE.LineBasicMaterial( {
color: 0xff0000,
opacity: 0.35,
linewidth: 2
} ) );
curve.mesh.castShadow = true;
splines.uniform = curve;
curve = new THREE.CatmullRomCurve3( positions, true );
curve.curveType = 'centripetal';
curve.mesh = new THREE.Line( geometry.clone(), new THREE.LineBasicMaterial( {
color: 0x00ff00,
opacity: 0.35,
linewidth: 2
} ) );
curve.mesh.castShadow = true;
curve.closed = true;
splines.centripetal = curve;
curve = new THREE.CatmullRomCurve3( positions );
curve.curveType = 'chordal';
curve.mesh = new THREE.Line( geometry.clone(), new THREE.LineBasicMaterial( {
color: 0x0000ff,
opacity: 0.35,
linewidth: 2
} ) );
curve.mesh.castShadow = true;
splines.chordal = curve;
for ( var k in splines ) {
var spline = splines[ k ];
scene.add( spline.mesh );
}
var controlPoints = [];
for (var i = 0; i < 5; i ++) {
var angle = i / 5 * Math.PI * 2;
controlPoints.push(
// new THREE.Vector3( (Math.random() - 0.5) * 1500, 0, (Math.random() - 0.5) * 1500 )
new THREE.Vector3( Math.cos(angle) * 600, Math.random() * 800 - 300, Math.sin(angle) * 600 )
)
}
load(controlPoints)
/*
load( [ new THREE.Vector3( -150 * 4, 0, 0 ),
new THREE.Vector3( -50 * 4, 0, 0 ),
new THREE.Vector3( 50 * 4, 0, 0 ),
new THREE.Vector3( 150 * 4, 0, 0 ) ] );
*/
initPathShader()
splinePosHelper = makeBox()
scene.add(splinePosHelper)
}
/****************************/
var gif, gif_processing = false;
function makeGif() {
gif_container = document.getElementById('gif_container');
gif_status = document.getElementById('gif_status');
gif_progress = document.getElementById('gif_progress');
gif_download = document.getElementById('gif_download');
var gl = renderer.context;
renderer.context.getImageData = (a, b, c, d) => {
const gl_w = gl.drawingBufferWidth, gl_h = gl.drawingBufferHeight;
const pixels = new Uint8Array(gl_w * gl_h * 4);
renderer.context.readPixels(a, b, c, d, gl.RGBA, gl.UNSIGNED_BYTE, pixels);
var imageData = new ImageData(Uint8ClampedArray.from(pixels), gl_w, gl_h);
const img_w = imageData.width, img_h = imageData.height;
const data = imageData.data;
Array.from({ length: img_h },
(val, i) => data.slice(i * img_w * 4, (i + 1) * img_w * 4))
.forEach((val, i) => data.set(val, (img_h - i - 1) * img_w * 4));
return imageData;
}
console.log('MakeGif');
if (gif) {
if (!gif_processing) {
gif.render();
gif_processing = true;
gif_status.textContent = 'Gif rendering ...';
gif.on('progress', p => {
const percent = Math.round(p * 100);
console.log(percent + '%');
gif_progress.value = percent;
});
gif.on('finished', blob => {
gif_processing = false;
gif = null;
gif_download.style.display = 'block';
gif_status.textContent = 'Gif render complete';
gif_download.href = URL.createObjectURL(blob);
});
}
else {
window.alert('gif rendering in progress');
}
return;
}
gif_container.style.display = 'block';
gif_download.style.display = 'none';
gif_progress.value = 0;
gif_status.textContent = 'Gif capturing ...';
const workers = navigator.hardwareConcurrency || 2;
console.log('gif rendering with', workers, 'web workers');
gif = new GIF({
workers: workers,
quality: 5,
width: gl.drawingBufferWidth,
height: gl.drawingBufferHeight,
workerScript: 'gif/gif.worker.js'
});
}
function updateModel() {
modifierObject.scale.setScalar( params.scale )
modifierObject.rotation.x = params.rotationX * Math.PI;
modifierObject.rotation.y = params.rotationY * Math.PI;
modifierObject.rotation.z = params.rotationZ * Math.PI;
modifierObject.position.x = params.translateX;
modifierObject.position.y = params.translateY;
modifierObject.position.z = params.translateZ;
orca.matrixAutoUpdate = false
modifierObject.updateMatrix()
orca.matrix.copy(modifierObject.matrix);
moo = referenceGeometry.clone().applyMatrix(modifierObject.matrix)
console.log(moo);
// use x-axis aligned
min = Math.min(...moo.vertices.map(v => v.x))
len = Math.max(...moo.vertices.map(v => v.x)) - min
console.log(len, min);
updateUniform('spineOffset', -min);
updateUniform('spineLength', len);
updateSplineOutline()
customMaterial.wireframe = params.wireframe;
}
function updateUniform(name, v) {
if (!uniforms) {
bufferUniforms[name] = v;
console.log('buffering uniform value', name);
return
}
uniforms[name].value = v;
}
function updateSplineTexture() {
if (!texture) return;
splines.centripetal.arcLengthDivisions = 200;
splines.centripetal.updateArcLengths()
splineLen = splines.centripetal.getLength()
var pathSegment = len / splineLen // should clam max to 1
// updateUniform('spineOffset', 0);
updateUniform('pathSegment', pathSegment);
var splineCurve = splines.centripetal;
// uniform chordal centripetal
var points = splineCurve.getSpacedPoints(TEXTURE_WIDTH - 1);
// getPoints() - unequal arc lengths
var frenetFrames = splineCurve.computeFrenetFrames(TEXTURE_WIDTH - 1, params.closed);
// console.log(frenetFrames);
// console.log('points', points);
for (var i = 0; i < TEXTURE_WIDTH; i++) {
var pt = points[i];
setTextureValue(i, pt.x, pt.y, pt.z, 0);
pt = frenetFrames.tangents[i];
setTextureValue(i, pt.x, pt.y, pt.z, 1);
pt = frenetFrames.normals[i];
setTextureValue(i, pt.x, pt.y, pt.z, 2);
pt = frenetFrames.binormals[i];
setTextureValue(i, pt.x, pt.y, pt.z, 3);
}
texture.needsUpdate = true;
}
function makeBox( position ) {
var material = new THREE.MeshLambertMaterial( { color: Math.random() * 0xffffff } );
var object = new THREE.Mesh( boxGeometry, material );
if ( position ) {
object.position.copy( position );
} else {
object.position.x = Math.random() * 1000 - 500;
object.position.y = Math.random() * 600;
object.position.z = Math.random() * 800 - 400;
}
object.castShadow = true;
object.receiveShadow = true;
scene.add( object );
return object;
}
function addSplineObject( position ) {
var object = makeBox( position );
splineHelperObjects.push( object );
return object;
}
function addPoint() {
splinePointsLength ++;
positions.push( addSplineObject().position );
updateSplineOutline();
}
function removePoint() {
if ( splinePointsLength <= 4 ) {
return;
}
splinePointsLength --;
positions.pop();
scene.remove( splineHelperObjects.pop() );
updateSplineOutline();
}
function updateSplineOutline() {
for ( var k in splines ) {
var spline = splines[ k ];
splineMesh = spline.mesh;
for ( var i = 0; i < ARC_SEGMENTS; i ++ ) {
var p = splineMesh.geometry.vertices[ i ];
var t = i / ( ARC_SEGMENTS - 1 );
spline.getPoint( t, p );
}
splineMesh.geometry.verticesNeedUpdate = true;
}
updateSplineTexture();
}
function exportSpline() {
var strplace = [];
for ( var i = 0; i < splinePointsLength; i ++ ) {
var p = splineHelperObjects[ i ].position;
strplace.push( `new THREE.Vector3(${p.x}, ${p.y}, ${p.z})` )
}
console.log( strplace.join( ',\n' ) );
var code = '[' + ( strplace.join( ',\n\t' ) ) + ']';
prompt( 'copy and paste code', code );
}
function load( new_positions ) {
while ( new_positions.length > positions.length ) {
addPoint();
}
while ( new_positions.length < positions.length ) {
removePoint();
}
for ( var i = 0; i < positions.length; i ++ ) {
positions[ i ].copy( new_positions[ i ] );
}
updateSplineOutline();
}
function animate() {
requestAnimationFrame( animate );
render();
stats.update();
transformControl.update();
if (gif && !gif_processing) {
gif.addFrame(renderer.context, { copy: true, delay: 20 });
const frames = gif.frames.length;
console.log('gif added frame', frames);
gif_status.textContent = 'Gif capturing ... frame ' + frames;
}
if (params.play) {
params.path += 0.005;
params.path %= 1;
gui.updateDisplay();
updateUniform('pathOffset', params.path);
splinePosHelper.position.copy(
splines.centripetal.getPointAt(params.path)
)
}
}
function render() {
splines.uniform.mesh.visible = params.uniform;
splines.centripetal.mesh.visible = params.centripetal;
splines.chordal.mesh.visible = params.chordal;
renderer.render( scene, camera );
}
</script>
</body>
</html>