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bend.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - geometry - bend 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 - bend editor</div>
<script src="three.js"></script>
<script src="DragControls.js"></script>
<script src="OrbitControls.js"></script>
<script src="TransformControls.js"></script>
<script src="OBJLoader.js"></script>
<script src="stats.min.js"></script>
<script src="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 = [], splineOutline;
var splinePointsLength = 4;
var positions = [];
var options;
var geometry = new THREE.BoxGeometry( 20, 20, 20 );
var transformControl;
var ARC_SEGMENTS = 200;
var splineMesh;
var splines = {};
var params = {
uniform: false,
tension: 0.5,
centripetal: true,
chordal: false,
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 );
spotlight = light;
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 );
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;
// splines.centripetal.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() {
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() );
}
THREE.CatmullRomCurve3.prototype.computeFrenetFrames = function ( segments, closed ) {
// see http://www.cs.indiana.edu/pub/techreports/TR425.pdf
var normal = new THREE.Vector3();
var tangents = [];
var normals = [];
var binormals = [];
var vec = new THREE.Vector3();
var mat = new THREE.Matrix4();
var i, u, theta;
// compute the tangent vectors for each segment on the curve
for ( i = 0; i <= segments; i ++ ) {
u = i / segments;
tangents[ i ] = this.getTangentAt( u );
tangents[ i ].normalize();
}
// select an initial normal vector perpendicular to the first tangent vector,
// and in the direction of the minimum tangent xyz component
normals[ 0 ] = new THREE.Vector3();
binormals[ 0 ] = new THREE.Vector3();
var min = Number.MAX_VALUE;
var tx = Math.abs( tangents[ 0 ].x );
var ty = Math.abs( tangents[ 0 ].y );
var tz = Math.abs( tangents[ 0 ].z );
/**/
if ( tx <= min ) {
min = tx;
normal.set( 1, 0, 0 );
}
if ( ty <= min ) {
min = ty;
normal.set( 0, 1, 0 );
}
if ( tz <= min ) {
normal.set( 0, 0, 1 );
}
// console.log(normal);
vec.crossVectors( tangents[ 0 ], normal ).normalize();
normals[ 0 ].crossVectors( tangents[ 0 ], vec );
binormals[ 0 ].crossVectors( tangents[ 0 ], normals[ 0 ] );
// binormals[ 0 ].set(0, 0, 1);
// normals[ 0 ].crossVectors(tangents[ 0 ], binormals[ 0 ]).normalize();
// compute the slowly-varying normal and binormal vectors for each segment on the curve
for ( i = 1; i <= segments; i ++ ) {
normals[ i ] = normals[ i - 1 ].clone();
binormals[ i ] = binormals[ i - 1 ].clone();
vec.crossVectors( tangents[ i - 1 ], tangents[ i ] );
if ( vec.length() > Number.EPSILON ) {
vec.normalize();
theta = Math.acos( THREE.Math.clamp( tangents[ i - 1 ].dot( tangents[ i ] ), - 1, 1 ) ); // clamp for floating pt errors
normals[ i ].applyMatrix4( mat.makeRotationAxis( vec, theta ) );
}
binormals[ i ].crossVectors( tangents[ i ], normals[ i ] );
}
// if the curve is closed, postprocess the vectors so the first and last normal vectors are the same
if ( closed === true ) {
theta = Math.acos( THREE.Math.clamp( normals[ 0 ].dot( normals[ segments ] ), - 1, 1 ) );
theta /= segments;
if ( tangents[ 0 ].dot( vec.crossVectors( normals[ 0 ], normals[ segments ] ) ) > 0 ) {
theta = - theta;
}
for ( i = 1; i <= segments; i ++ ) {
// twist a little...
normals[ i ].applyMatrix4( mat.makeRotationAxis( tangents[ i ], theta * i ) );
binormals[ i ].crossVectors( tangents[ i ], normals[ i ] );
}
}
return {
tangents: tangents,
normals: normals,
binormals: binormals
};
}
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 );
curve.curveType = 'centripetal';
curve.mesh = new THREE.Line( geometry.clone(), new THREE.LineBasicMaterial( {
color: 0x00ff00,
opacity: 0.35,
linewidth: 2
} ) );
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,
linewidth: 2
} ) );
curve.mesh.castShadow = true;
splines.chordal = curve;
for ( var k in splines ) {
var spline = splines[ k ];
scene.add( spline.mesh );
}
load( [ new THREE.Vector3( -150, 0, 0 ),
new THREE.Vector3( -50, 0, 0 ),
new THREE.Vector3( 50, 0, 0 ),
new THREE.Vector3( 150, 0, 0 ) ] );
initFish()
}
function initTexture() {
const width = 256;
const height = 4;
const dataArray = new Float32Array( width * height * 3 );
const dataTexture = new THREE.DataTexture(
dataArray, width, height, THREE.RGBFormat, THREE.FloatType
);
dataTexture.needsUpdate = true;
return dataTexture;
}
function setTextureValue(index, x, y, z, o) {
const image = texture.image;
const { width, height, data } = image;
const i = 3 * width * (o || 0);
data[index * 3 + i + 0] = x;
data[index * 3 + i + 1] = y;
data[index * 3 + i + 2] = z;
}
function initFish() {
// TODO Texture Loading + Load Manager
// customMaterial = new THREE.MeshBasicMaterial({
// wireframe: true,
// color: 0x000000
// });
if ( ! renderer.extensions.get( "OES_texture_float" ) ) {
console.log("No OES_texture_float support for float textures.");
}
if ( renderer.capabilities.maxVertexTextures === 0 ) {
console.log("No support for vertex shader textures.");
}
texture = initTexture();
/*
for (var i = 0; i < 256; i++) {
setTextureValue(i, i / 256 * 1, 0, 0)
}
texture.needsUpdate = true;
//
orca.children[0].geometry.computeBoundingBox()
bb = orca.children[0].geometry.boundingBox
bb.max.z - bb.min.z
*/
customMaterial = new THREE.ShaderMaterial({
wireframe: true,
uniforms: {
texture: { value: texture }
},
vertexShader: `
uniform sampler2D texture;
void main() {
float tz = 1. - (position.z + 6.) / 10.;
float textureLayers = 4.;
// (i + 0.5) / textureLayers
vec3 spline_pos = texture2D(texture, vec2(tz, (0.5) / textureLayers)).xyz;
vec3 a = texture2D(texture, vec2(tz, (1. + 0.5) / textureLayers)).xyz;
vec3 b = texture2D(texture, vec2(tz, (2. + 0.5) / textureLayers)).xyz;
vec3 c = texture2D(texture, vec2(tz, (3. + 0.5) / textureLayers)).xyz;
mat3 basis = mat3(a, b, c);
vec4 worldPos = modelMatrix * vec4(position, 1.);
worldPos = vec4(
basis *
vec3(worldPos.x * 0., worldPos.y * 1., worldPos.z * 1.)
// vec3(worldPos.x, worldPos.y, worldPos.z)
+ spline_pos
, 1.);
vec4 mvPosition = viewMatrix * worldPos;
gl_Position = projectionMatrix * mvPosition;
}
`,
fragmentShader: `
void main() {
gl_FragColor.rgb = vec3(0.);
}
`
})
var loader = new THREE.OBJLoader();
// load a resource
loader.load(
// resource URL
'ORCA.OBJ',
// called when resource is loaded
function onLoad( object ) {
window.orca = object;
object.traverse( function ( child ) {
if ( child instanceof THREE.Mesh ) {
child.scale.multiplyScalar(50);
child.position.y = 100;
child.rotation.y = -Math.PI / 2;
child.material = customMaterial
// child.material.map = texture;
// child.material.color = 0x000000;
// child.material.wireframe = true;
// TODO add shader material?
}
} );
updateSplineOutline()
// -3, 6
// orca.children[0].geometry.attributes.position.array
// -0.59 2.42
// orca.children.splice(0, 1)
// orca.children.splice(2, 1)
// orca.children.splice(1, 1)
orca.children[0].geometry.computeBoundingBox()
console.log(orca.children[0].geometry.boundingBox);
scene.add( object );
},
// called when loading is in progresses
function onProgress( xhr ) {
console.log( ( xhr.loaded / xhr.total * 100 ) + '% loaded' );
},
// called when loading has errors
function onError( error ) {
console.log( 'An error happened' );
}
);
}
/****************************/
function updateSplineTexture() {
if (!window.texture) return;
var POINTS = 256;
// uniform chordal centripetal
var points = splines.centripetal.getSpacedPoints(POINTS - 1);
// getPoints() - unequal arc lengths
var frenetFrames = splines.centripetal.computeFrenetFrames(POINTS - 1);
// console.log(frenetFrames);
// console.log('points', points);
for (var i = 0; i < POINTS; 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 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 ];
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({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();
transformControl.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>