forked from schteppe/cannon.js
-
Notifications
You must be signed in to change notification settings - Fork 0
/
threejs_cloth.html
308 lines (237 loc) · 10.4 KB
/
threejs_cloth.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
<!DOCTYPE html>
<html lang="en">
<head>
<title>cannon.js cloth simulation</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: #000;
color: #000;
margin: 0px;
overflow: hidden;
}
#info {
text-align: center;
padding: 10px;
z-index: 10;
width: 100%;
position: absolute;
}
a {
text-decoration: underline;
cursor: pointer;
}
</style>
</head>
<body>
<script src="../libs/Three.js"></script>
<script src="../libs/TrackballControls.js"></script>
<script src="../libs/Detector.js"></script>
<script src="../build/cannon.js"></script>
<script>
var dt = 1/60, R = 0.2;
var clothMass = 1; // 1 kg in total
var clothSize = 1; // 1 meter
var Nx = 12;
var Ny = 12;
var mass = clothMass / Nx*Ny;
var restDistance = clothSize/Nx;
var ballSize = 0.1;
var clothFunction = plane(restDistance * Nx, restDistance * Ny);
function plane(width, height) {
return function(u, v) {
var x = (u-0.5) * width;
var y = (v+0.5) * height;
var z = 0;
return new THREE.Vector3(x, y, z);
};
}
if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
var container, stats;
var camera, scene, renderer;
var clothGeometry;
var sphereMesh, sphereBody;
var object;
var particles = [];
var world;
initCannon();
init();
animate();
function initCannon(){
world = new CANNON.World();
world.broadphase = new CANNON.NaiveBroadphase();
world.gravity.set(0,-9.82,0);
world.solver.iterations = 20;
// Materials
var clothMaterial = new CANNON.Material();
var sphereMaterial = new CANNON.Material();
var clothSphereContactMaterial = new CANNON.ContactMaterial( clothMaterial,
sphereMaterial,
0.0, // friction coefficient
0.0 // restitution
);
// Adjust constraint equation parameters for ground/ground contact
clothSphereContactMaterial.contactEquationStiffness = 1e9;
clothSphereContactMaterial.contactEquationRelaxation = 3;
// Add contact material to the world
world.addContactMaterial(clothSphereContactMaterial);
// Create sphere
var sphereShape = new CANNON.Sphere(ballSize*1.3);
sphereBody = new CANNON.Body({
mass: 0
});
sphereBody.addShape(sphereShape);
sphereBody.position.set(0,0,0);
world.addBody(sphereBody);
// Create cannon particles
for ( var i = 0, il = Nx+1; i !== il; i++ ) {
particles.push([]);
for ( var j = 0, jl = Ny+1; j !== jl; j++ ) {
var idx = j*(Nx+1) + i;
var p = clothFunction(i/(Nx+1), j/(Ny+1));
var particle = new CANNON.Body({
mass: j==Ny ? 0 : mass
});
particle.addShape(new CANNON.Particle());
particle.linearDamping = 0.5;
particle.position.set(
p.x,
p.y-Ny * 0.9 * restDistance,
p.z
);
particles[i].push(particle);
world.addBody(particle);
particle.velocity.set(0,0,-0.1*(Ny-j));
}
}
function connect(i1,j1,i2,j2){
world.addConstraint( new CANNON.DistanceConstraint(particles[i1][j1],particles[i2][j2],restDistance) );
}
for(var i=0; i<Nx+1; i++){
for(var j=0; j<Ny+1; j++){
if(i<Nx) connect(i,j,i+1,j);
if(j<Ny) connect(i,j,i,j+1);
}
}
}
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
// scene
scene = new THREE.Scene();
scene.fog = new THREE.Fog( 0x000000, 500, 10000 );
// camera
camera = new THREE.PerspectiveCamera( 30, window.innerWidth / window.innerHeight, 0.5, 10000 );
camera.position.set(Math.cos( Math.PI/4 ) * 3,
0,
Math.sin( Math.PI/4 ) * 3);
scene.add( camera );
// Controls
controls = new THREE.TrackballControls( camera );
controls.rotateSpeed = 1.0;
controls.zoomSpeed = 1.2;
controls.panSpeed = 0.8;
controls.noZoom = false;
controls.noPan = false;
controls.staticMoving = true;
controls.dynamicDampingFactor = 0.3;
controls.keys = [ 65, 83, 68 ];
// lights
var light, materials;
scene.add( new THREE.AmbientLight( 0x666666 ) );
light = new THREE.DirectionalLight( 0xffffff, 1.75 );
var d = 5;
light.position.set( d, d, d );
light.castShadow = true;
//light.shadowCameraVisible = true;
light.shadowMapWidth = 1024*2;
light.shadowMapHeight = 1024*2;
light.shadowCameraLeft = -d;
light.shadowCameraRight = d;
light.shadowCameraTop = d;
light.shadowCameraBottom = -d;
light.shadowCameraFar = 3*d;
light.shadowCameraNear = d;
light.shadowDarkness = 0.5;
scene.add( light );
/*
light = new THREE.DirectionalLight( 0xffffff, 0.35 );
light.position.set( 0, -1, 0 );
scene.add( light );
*/
// cloth material
var clothTexture = THREE.ImageUtils.loadTexture( 'sunflower.jpg' ); // circuit_pattern.png
clothTexture.wrapS = clothTexture.wrapT = THREE.RepeatWrapping;
clothTexture.anisotropy = 16;
var clothMaterial = new THREE.MeshPhongMaterial( {
alphaTest: 0.5,
ambient: 0x000000,
color: 0xffffff,
specular: 0x333333,
emissive: 0x222222,
//shininess: 5,
map: clothTexture,
side: THREE.DoubleSide
} );
// cloth geometry
clothGeometry = new THREE.ParametricGeometry( clothFunction, Nx, Ny, true );
clothGeometry.dynamic = true;
clothGeometry.computeFaceNormals();
// cloth mesh
object = new THREE.Mesh(clothGeometry, clothMaterial);
object.position.set(0, 0, 0);
object.castShadow = true;
//object.receiveShadow = true;
scene.add( object );
// sphere
var ballGeo = new THREE.SphereGeometry( ballSize, 20, 20 );
var ballMaterial = new THREE.MeshPhongMaterial( { color: 0x888888 } );
sphereMesh = new THREE.Mesh( ballGeo, ballMaterial );
sphereMesh.castShadow = true;
//sphereMesh.receiveShadow = true;
scene.add( sphereMesh );
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.setClearColor( scene.fog.color );
container.appendChild( renderer.domElement );
renderer.gammaInput = true;
renderer.gammaOutput = true;
renderer.physicallyBasedShading = true;
renderer.shadowMapEnabled = true;
window.addEventListener( 'resize', onWindowResize, false );
camera.lookAt( sphereMesh.position );
}
//
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
controls.handleResize();
renderer.setSize( window.innerWidth, window.innerHeight );
}
function animate() {
requestAnimationFrame( animate );
controls.update();
world.step(dt);
var t = world.time;
sphereBody.position.set(R * Math.sin(t), 0, R * Math.cos(t));
render();
}
function render() {
for ( var i = 0, il = Nx+1; i !== il; i++ ) {
for ( var j = 0, jl = Ny+1; j !== jl; j++ ) {
var idx = j*(Nx+1) + i;
clothGeometry.vertices[idx].copy(particles[i][j].position);
}
}
clothGeometry.computeFaceNormals();
clothGeometry.computeVertexNormals();
clothGeometry.normalsNeedUpdate = true;
clothGeometry.verticesNeedUpdate = true;
sphereMesh.position.copy(sphereBody.position);
renderer.render( scene, camera );
}
</script>
</body>
</html>