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webgl_geometry_extrude_splines.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - geometry - shapes</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;
}
</style>
</head>
<body>
<script src="../build/three.min.js"></script>
<script src="../src/extras/core/Curve.js"></script>
<script src="../src/extras/geometries/TubeGeometry.js"></script>
<script src="../src/extras/helpers/CameraHelper.js"></script>
<!-- where curves formulas are defined -->
<script src="js/CurveExtras.js"></script>
<script src="js/Stats.js"></script>
<script>
var container, stats;
var camera, scene, renderer, splineCamera, cameraHelper, cameraEye;
var text, plane;
var targetRotation = 0;
var targetRotationOnMouseDown = 0;
var mouseX = 0;
var mouseXOnMouseDown = 0;
var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;
var binormal = new THREE.Vector3();
var normal = new THREE.Vector3();
var pipeSpline = new THREE.SplineCurve3([
new THREE.Vector3(0, 10, -10), new THREE.Vector3(10, 0, -10), new THREE.Vector3(20, 0, 0), new THREE.Vector3(30, 0, 10), new THREE.Vector3(30, 0, 20), new THREE.Vector3(20, 0, 30), new THREE.Vector3(10, 0, 30), new THREE.Vector3(0, 0, 30), new THREE.Vector3(-10, 10, 30), new THREE.Vector3(-10, 20, 30), new THREE.Vector3(0, 30, 30), new THREE.Vector3(10, 30, 30), new THREE.Vector3(20, 30, 15), new THREE.Vector3(10, 30, 10), new THREE.Vector3(0, 30, 10), new THREE.Vector3(-10, 20, 10), new THREE.Vector3(-10, 10, 10), new THREE.Vector3(0, 0, 10), new THREE.Vector3(10, -10, 10), new THREE.Vector3(20, -15, 10), new THREE.Vector3(30, -15, 10), new THREE.Vector3(40, -15, 10), new THREE.Vector3(50, -15, 10), new THREE.Vector3(60, 0, 10), new THREE.Vector3(70, 0, 0), new THREE.Vector3(80, 0, 0), new THREE.Vector3(90, 0, 0), new THREE.Vector3(100, 0, 0)]);
var sampleClosedSpline = new THREE.ClosedSplineCurve3([
new THREE.Vector3(0, -40, -40),
new THREE.Vector3(0, 40, -40),
new THREE.Vector3(0, 140, -40),
new THREE.Vector3(0, 40, 40),
new THREE.Vector3(0, -40, 40),
]);
// Keep a dictionary of Curve instances
var splines = {
GrannyKnot: new THREE.Curves.GrannyKnot(),
HeartCurve: new THREE.Curves.HeartCurve(3.5),
VivianiCurve: new THREE.Curves.VivianiCurve(70),
KnotCurve: new THREE.Curves.KnotCurve(),
HelixCurve: new THREE.Curves.HelixCurve(),
TrefoilKnot: new THREE.Curves.TrefoilKnot(),
TorusKnot: new THREE.Curves.TorusKnot(20),
CinquefoilKnot: new THREE.Curves.CinquefoilKnot(20),
TrefoilPolynomialKnot: new THREE.Curves.TrefoilPolynomialKnot(14),
FigureEightPolynomialKnot: new THREE.Curves.FigureEightPolynomialKnot(),
DecoratedTorusKnot4a: new THREE.Curves.DecoratedTorusKnot4a(),
DecoratedTorusKnot4b: new THREE.Curves.DecoratedTorusKnot4b(),
DecoratedTorusKnot5a: new THREE.Curves.DecoratedTorusKnot5a(),
DecoratedTorusKnot5c: new THREE.Curves.DecoratedTorusKnot5c(),
PipeSpline: pipeSpline,
SampleClosedSpline: sampleClosedSpline
};
extrudePath = new THREE.Curves.TrefoilKnot();
var dropdown = '<select id="dropdown" onchange="addTube(this.value)">';
var s;
for ( s in splines ) {
dropdown += '<option value="' + s + '"';
dropdown += '>' + s + '</option>';
}
dropdown += '</select>';
var closed2 = true;
var debug = true;
var parent;
var tube, tubeMesh;
var animation = false, lookAhead = false;
var scale;
var showCameraHelper = false;
function addTube() {
var value = document.getElementById('dropdown').value;
var segments = parseInt(document.getElementById('segments').value);
closed2 = document.getElementById('closed').checked;
debug = document.getElementById('debug').checked;
var radiusSegments = parseInt(document.getElementById('radiusSegments').value);
console.log('adding tube', value, closed2, debug, radiusSegments);
if (tubeMesh) parent.remove(tubeMesh);
extrudePath = splines[value];
tube = new THREE.TubeGeometry(extrudePath, segments, 2, radiusSegments, closed2, debug);
addGeometry(tube, 0xff00ff);
setScale();
}
function setScale() {
scale = parseInt( document.getElementById('scale').value );
tubeMesh.scale.set( scale, scale, scale );
}
function addGeometry( geometry, color ) {
// 3d shape
tubeMesh = THREE.SceneUtils.createMultiMaterialObject( geometry, [
new THREE.MeshLambertMaterial({
color: color,
opacity: geometry.debug ? 0.2 : 0.8,
transparent: true
}),
new THREE.MeshBasicMaterial({
color: 0x000000,
opacity: 0.5,
wireframe: true
})]);
if ( geometry.debug ) tubeMesh.add( geometry.debug );
parent.add( tubeMesh );
}
function animateCamera( toggle ) {
if ( toggle ) {
animation = animation === false;
document.getElementById('animation').value = 'Camera Spline Animation View: ' + (animation? 'ON': 'OFF');
}
lookAhead = document.getElementById('lookAhead').checked;
showCameraHelper = document.getElementById('cameraHelper').checked;
cameraHelper.visible = showCameraHelper;
cameraEye.visible = showCameraHelper;
}
init();
animate();
function init() {
container = document.createElement('div');
document.body.appendChild(container);
var info = document.createElement('div');
info.style.position = 'absolute';
info.style.top = '10px';
info.style.width = '100%';
info.style.textAlign = 'center';
info.innerHTML = 'Spline Extrusion Examples by <a href="http://www.lab4games.net/zz85/blog">zz85</a><br/>Select spline:';
info.innerHTML += dropdown;
info.innerHTML += '<br/>Scale: <select id="scale" onchange="setScale()"><option>1</option><option>2</option><option selected>4</option><option>6</option><option>10</option></select>';
info.innerHTML += '<br/>Extrusion Segments: <select onchange="addTube()" id="segments"><option>50</option><option selected>100</option><option>200</option><option>400</option></select>';
info.innerHTML += '<br/>Radius Segments: <select id="radiusSegments" onchange="addTube()"><option>1</option><option>2</option><option selected>3</option><option>4</option><option>5</option><option>6</option><option>8</option><option>12</option></select>';
info.innerHTML += '<br/>Debug normals: <input id="debug" type="checkbox" onchange="addTube()" /> Closed:<input id="closed" onchange="addTube()" type="checkbox" checked />';
info.innerHTML += '<br/><br/><input id="animation" type="button" onclick="animateCamera(true)" value="Camera Spline Animation View: OFF"/><br/> Look Ahead <input id="lookAhead" type="checkbox" onchange="animateCamera()" /> Camera Helper <input id="cameraHelper" type="checkbox" onchange="animateCamera()" />';
container.appendChild(info);
//
camera = new THREE.PerspectiveCamera(50, window.innerWidth / window.innerHeight, 0.01, 1000);
camera.position.set(0, 50, 500);
scene = new THREE.Scene();
var light = new THREE.DirectionalLight(0xffffff);
light.position.set(0, 0, 1);
scene.add(light);
parent = new THREE.Object3D();
parent.position.y = 100;
scene.add( parent );
splineCamera = new THREE.PerspectiveCamera(84, window.innerWidth / window.innerHeight, 0.01, 1000);
parent.add(splineCamera);
cameraHelper = new THREE.CameraHelper(splineCamera);
scene.add(cameraHelper);
addTube();
// Debug point
cameraEye = new THREE.Mesh( new THREE.SphereGeometry( 5 ), new THREE.MeshBasicMaterial( { color: 0xdddddd } ) );
parent.add(cameraEye);
cameraHelper.visible = showCameraHelper;
cameraEye.visible = showCameraHelper;
//
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setSize( window.innerWidth, window.innerHeight );
container.appendChild( renderer.domElement );
stats = new Stats();
stats.domElement.style.position = 'absolute';
stats.domElement.style.top = '0px';
container.appendChild( stats.domElement );
renderer.domElement.addEventListener( 'mousedown', onDocumentMouseDown, false );
renderer.domElement.addEventListener( 'touchstart', onDocumentTouchStart, false );
renderer.domElement.addEventListener( 'touchmove', onDocumentTouchMove, false );
//
window.addEventListener( 'resize', onWindowResize, false );
}
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 onDocumentMouseDown(event) {
event.preventDefault();
renderer.domElement.addEventListener( 'mousemove', onDocumentMouseMove, false );
renderer.domElement.addEventListener( 'mouseup', onDocumentMouseUp, false );
renderer.domElement.addEventListener( 'mouseout', onDocumentMouseOut, false );
mouseXOnMouseDown = event.clientX - windowHalfX;
targetRotationOnMouseDown = targetRotation;
}
function onDocumentMouseMove(event) {
mouseX = event.clientX - windowHalfX;
targetRotation = targetRotationOnMouseDown + (mouseX - mouseXOnMouseDown) * 0.02;
}
function onDocumentMouseUp(event) {
renderer.domElement.removeEventListener( 'mousemove', onDocumentMouseMove, false );
renderer.domElement.removeEventListener( 'mouseup', onDocumentMouseUp, false );
renderer.domElement.removeEventListener( 'mouseout', onDocumentMouseOut, false );
}
function onDocumentMouseOut(event) {
renderer.domElement.removeEventListener( 'mousemove', onDocumentMouseMove, false );
renderer.domElement.removeEventListener( 'mouseup', onDocumentMouseUp, false );
renderer.domElement.removeEventListener( 'mouseout', onDocumentMouseOut, false );
}
function onDocumentTouchStart(event) {
if (event.touches.length == 1) {
event.preventDefault();
mouseXOnMouseDown = event.touches[ 0 ].pageX - windowHalfX;
targetRotationOnMouseDown = targetRotation;
}
}
function onDocumentTouchMove(event) {
if (event.touches.length == 1) {
event.preventDefault();
mouseX = event.touches[ 0 ].pageX - windowHalfX;
targetRotation = targetRotationOnMouseDown + (mouseX - mouseXOnMouseDown) * 0.05;
}
}
//
function animate() {
requestAnimationFrame(animate);
render();
stats.update();
}
function render() {
// Try Animate Camera Along Spline
var time = Date.now();
var looptime = 20 * 1000;
var t = (time % looptime) / looptime;
var pos = tube.path.getPointAt(t);
pos.multiplyScalar(scale);
// interpolation
var segments = tube.tangents.length;
var pickt = t * segments;
var pick = Math.floor(pickt);
var pickNext = (pick + 1) % segments;
binormal.sub(tube.binormals[pickNext], tube.binormals[pick]);
binormal.multiplyScalar(pickt - pick).addSelf(tube.binormals[pick]);
var dir = tube.path.getTangentAt(t);
var offset = 15;
normal.copy(binormal).crossSelf(dir);
// We move on a offset on its binormal
pos.addSelf(normal.clone().multiplyScalar(offset));
splineCamera.position = pos;
cameraEye.position = pos;
// Camera Orientation 1 - default look at
// splineCamera.lookAt(lookAt);
// Using arclength for stablization in look ahead.
var lookAt = tube.path.getPointAt((t + 30/tube.path.getLength()) % 1).multiplyScalar(scale);
// Camera Orientation 2 - up orientation via normal
if (!lookAhead)
lookAt.copy(pos).addSelf(dir);
splineCamera.matrix.lookAt(splineCamera.position, lookAt, normal);
splineCamera.rotation.setEulerFromRotationMatrix(splineCamera.matrix, splineCamera.eulerOrder);
cameraHelper.update();
parent.rotation.y += ( targetRotation - parent.rotation.y ) * 0.05;
renderer.render( scene, animation === true ? splineCamera : camera );
}
</script>
</body>
</html>