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webgl_geometry_spline_editor.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - geometry - catmull spline editor</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;
}
</style>
</head>
<body>
<div id="container"></div>
<div id="info"><a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - geometry - catmull spline editor</div>
<script src="../build/three.js"></script>
<script src="js/controls/DragControls.js"></script>
<script src="js/controls/OrbitControls.js"></script>
<script src="js/controls/TransformControls.js"></script>
<script src="js/libs/stats.min.js"></script>
<script src="js/libs/dat.gui.min.js"></script>
<script>
String.prototype.format = function () {
var str = this;
for ( var i = 0; i < arguments.length; i ++ ) {
str = str.replace( '{' + i + '}', arguments[ i ] );
}
return str;
};
var container, stats;
var camera, scene, renderer;
var splineHelperObjects = [];
var splinePointsLength = 4;
var positions = [];
var point = new THREE.Vector3();
var geometry = new THREE.BoxBufferGeometry( 20, 20, 20 );
var transformControl;
var ARC_SEGMENTS = 200;
var splines = {};
var params = {
uniform: true,
tension: 0.5,
centripetal: true,
chordal: true,
addPoint: addPoint,
removePoint: removePoint,
exportSpline: exportSpline
};
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( 0xf0f0f0 ) );
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 );
var planeGeometry = new THREE.PlaneBufferGeometry( 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: true } );
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 );
var gui = new dat.GUI();
gui.add( params, 'uniform' );
gui.add( params, 'tension', 0, 1 ).step( 0.01 ).onChange( function ( value ) {
splines.uniform.tension = value;
updateSplineOutline();
} );
gui.add( params, 'centripetal' );
gui.add( params, 'chordal' );
gui.add( params, 'addPoint' );
gui.add( params, 'removePoint' );
gui.add( params, 'exportSpline' );
gui.open();
// Controls
var controls = new THREE.OrbitControls( camera, renderer.domElement );
controls.damping = 0.2;
controls.addEventListener( 'change', render );
controls.addEventListener( 'start', function () {
cancelHideTransform();
} );
controls.addEventListener( 'end', function () {
delayHideTransform();
} );
transformControl = new THREE.TransformControls( camera, renderer.domElement );
transformControl.addEventListener( 'change', render );
transformControl.addEventListener( 'dragging-changed', function ( event ) {
controls.enabled = ! event.value;
} );
scene.add( transformControl );
// Hiding transform situation is a little in a mess :()
transformControl.addEventListener( 'change', function () {
cancelHideTransform();
} );
transformControl.addEventListener( 'mouseDown', function () {
cancelHideTransform();
} );
transformControl.addEventListener( 'mouseUp', function () {
delayHideTransform();
} );
transformControl.addEventListener( 'objectChange', function () {
updateSplineOutline();
} );
var dragcontrols = new THREE.DragControls( splineHelperObjects, camera, renderer.domElement ); //
dragcontrols.enabled = false;
dragcontrols.addEventListener( 'hoveron', function ( event ) {
transformControl.attach( event.object );
cancelHideTransform();
} );
dragcontrols.addEventListener( 'hoveroff', function () {
delayHideTransform();
} );
var hiding;
function delayHideTransform() {
cancelHideTransform();
hideTransform();
}
function hideTransform() {
hiding = setTimeout( function () {
transformControl.detach( transformControl.object );
}, 2500 );
}
function cancelHideTransform() {
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.BufferGeometry();
geometry.addAttribute( 'position', new THREE.BufferAttribute( new Float32Array( ARC_SEGMENTS * 3 ), 3 ) );
var curve = new THREE.CatmullRomCurve3( positions );
curve.curveType = 'catmullrom';
curve.mesh = new THREE.Line( geometry.clone(), new THREE.LineBasicMaterial( {
color: 0xff0000,
opacity: 0.35
} ) );
curve.mesh.castShadow = true;
splines.uniform = curve;
curve = new THREE.CatmullRomCurve3( positions );
curve.curveType = 'centripetal';
curve.mesh = new THREE.Line( geometry.clone(), new THREE.LineBasicMaterial( {
color: 0x00ff00,
opacity: 0.35
} ) );
curve.mesh.castShadow = 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
} ) );
curve.mesh.castShadow = true;
splines.chordal = curve;
for ( var k in splines ) {
var spline = splines[ k ];
scene.add( spline.mesh );
}
load( [ new THREE.Vector3( 289.76843686945404, 452.51481137238443, 56.10018915737797 ),
new THREE.Vector3( - 53.56300074753207, 171.49711742836848, - 14.495472686253045 ),
new THREE.Vector3( - 91.40118730204415, 176.4306956436485, - 6.958271935582161 ),
new THREE.Vector3( - 383.785318791128, 491.1365363371675, 47.869296953772746 ) ] );
}
function addSplineObject( position ) {
var material = new THREE.MeshLambertMaterial( { color: Math.random() * 0xffffff } );
var object = new THREE.Mesh( geometry, 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 );
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 ];
var splineMesh = spline.mesh;
var position = splineMesh.geometry.attributes.position;
for ( var i = 0; i < ARC_SEGMENTS; i ++ ) {
var t = i / ( ARC_SEGMENTS - 1 );
spline.getPoint( t, point );
position.setXYZ( i, point.x, point.y, point.z );
}
position.needsUpdate = true;
}
}
function exportSpline() {
var strplace = [];
for ( var i = 0; i < splinePointsLength; i ++ ) {
var p = splineHelperObjects[ i ].position;
strplace.push( 'new THREE.Vector3({0}, {1}, {2})'.format( 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();
}
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>