HTML | NeuroΨ Webdesign

CSS3 transforms in depth

https://www.w3.org/TR/css-transforms-1/

WebGL Interactive Physics Engine

Click with your mouse to interact with the application…

<html lang="en">
	<head>
		<title>Ammo.js softbody volume demo</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<link type="text/css" rel="stylesheet" href="main.css">
		<style>
			body {
				color: #333;
			}
		</style>
	</head>
	<body>
		<div id="info">
			Ammo.js physics soft body volume demo<br/>
			Click to throw a ball
		</div>
		<div id="container"></div>

		<script src="../build/three.js"></script>
		<script src="js/libs/ammo.js"></script>
		<script src="js/controls/OrbitControls.js"></script>
		<script src="js/utils/BufferGeometryUtils.js"></script>
		<script src="js/WebGL.js"></script>
		<script src="js/libs/stats.min.js"></script>

		<script>

			if ( WEBGL.isWebGLAvailable() === false ) {

				document.body.appendChild( WEBGL.getWebGLErrorMessage() );

			}

			// Graphics variables
			var container, stats;
			var camera, controls, scene, renderer;
			var textureLoader;
			var clock = new THREE.Clock();
			var clickRequest = false;
			var mouseCoords = new THREE.Vector2();
			var raycaster = new THREE.Raycaster();
			var ballMaterial = new THREE.MeshPhongMaterial( { color: 0x202020 } );
			var pos = new THREE.Vector3();
			var quat = new THREE.Quaternion();

			// Physics variables
			var gravityConstant = - 9.8;
			var physicsWorld;
			var rigidBodies = [];
			var softBodies = [];
			var margin = 0.05;
			var transformAux1;
			var softBodyHelpers;

			Ammo().then( function( AmmoLib ) {

				Ammo = AmmoLib;

				init();
				animate();

			} );

			function init() {

				initGraphics();

				initPhysics();

				createObjects();

				initInput();

			}

			function initGraphics() {

				container = document.getElementById( 'container' );

				camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 0.2, 2000 );

				scene = new THREE.Scene();
				scene.background = new THREE.Color( 0xbfd1e5 );

				camera.position.set( - 7, 5, 8 );

				renderer = new THREE.WebGLRenderer();
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.shadowMap.enabled = true;
				container.appendChild( renderer.domElement );

				controls = new THREE.OrbitControls( camera, renderer.domElement );
				controls.target.set( 0, 2, 0 );
				controls.update();

				textureLoader = new THREE.TextureLoader();

				var ambientLight = new THREE.AmbientLight( 0x404040 );
				scene.add( ambientLight );

				var light = new THREE.DirectionalLight( 0xffffff, 1 );
				light.position.set( - 10, 10, 5 );
				light.castShadow = true;
				var d = 20;
				light.shadow.camera.left = - d;
				light.shadow.camera.right = d;
				light.shadow.camera.top = d;
				light.shadow.camera.bottom = - d;

				light.shadow.camera.near = 2;
				light.shadow.camera.far = 50;

				light.shadow.mapSize.x = 1024;
				light.shadow.mapSize.y = 1024;

				scene.add( light );

				stats = new Stats();
				stats.domElement.style.position = 'absolute';
				stats.domElement.style.top = '0px';
				container.appendChild( stats.domElement );


				window.addEventListener( 'resize', onWindowResize, false );

			}

			function initPhysics() {

				// Physics configuration

				var collisionConfiguration = new Ammo.btSoftBodyRigidBodyCollisionConfiguration();
				var dispatcher = new Ammo.btCollisionDispatcher( collisionConfiguration );
				var broadphase = new Ammo.btDbvtBroadphase();
				var solver = new Ammo.btSequentialImpulseConstraintSolver();
				var softBodySolver = new Ammo.btDefaultSoftBodySolver();
				physicsWorld = new Ammo.btSoftRigidDynamicsWorld( dispatcher, broadphase, solver, collisionConfiguration, softBodySolver );
				physicsWorld.setGravity( new Ammo.btVector3( 0, gravityConstant, 0 ) );
				physicsWorld.getWorldInfo().set_m_gravity( new Ammo.btVector3( 0, gravityConstant, 0 ) );

				transformAux1 = new Ammo.btTransform();
				softBodyHelpers = new Ammo.btSoftBodyHelpers();

			}

			function createObjects() {

				// Ground
				pos.set( 0, - 0.5, 0 );
				quat.set( 0, 0, 0, 1 );
				var ground = createParalellepiped( 40, 1, 40, 0, pos, quat, new THREE.MeshPhongMaterial( { color: 0xFFFFFF } ) );
				ground.castShadow = true;
				ground.receiveShadow = true;
				textureLoader.load( "textures/grid.png", function ( texture ) {

					texture.wrapS = THREE.RepeatWrapping;
					texture.wrapT = THREE.RepeatWrapping;
					texture.repeat.set( 40, 40 );
					ground.material.map = texture;
					ground.material.needsUpdate = true;

				} );

				// Create soft volumes
				var volumeMass = 15;

				var sphereGeometry = new THREE.SphereBufferGeometry( 1.5, 40, 25 );
				sphereGeometry.translate( 5, 5, 0 );
				createSoftVolume( sphereGeometry, volumeMass, 250 );

				var boxGeometry = new THREE.BoxBufferGeometry( 1, 1, 5, 4, 4, 20 );
				boxGeometry.translate( - 2, 5, 0 );
				createSoftVolume( boxGeometry, volumeMass, 120 );

				// Ramp
				pos.set( 3, 1, 0 );
				quat.setFromAxisAngle( new THREE.Vector3( 0, 0, 1 ), 30 * Math.PI / 180 );
				var obstacle = createParalellepiped( 10, 1, 4, 0, pos, quat, new THREE.MeshPhongMaterial( { color: 0x606060 } ) );
				obstacle.castShadow = true;
				obstacle.receiveShadow = true;

			}

			function processGeometry( bufGeometry ) {

				// Ony consider the position values when merging the vertices
				var posOnlyBufGeometry = new THREE.BufferGeometry();
				posOnlyBufGeometry.addAttribute( 'position', bufGeometry.getAttribute( 'position' ) );
				posOnlyBufGeometry.setIndex( bufGeometry.getIndex() );

				// Merge the vertices so the triangle soup is converted to indexed triangles
				var indexedBufferGeom = THREE.BufferGeometryUtils.mergeVertices( posOnlyBufGeometry );

				// Create index arrays mapping the indexed vertices to bufGeometry vertices
				mapIndices( bufGeometry, indexedBufferGeom );

			}

			function isEqual( x1, y1, z1, x2, y2, z2 ) {

				var delta = 0.000001;
				return Math.abs( x2 - x1 ) < delta &&
						Math.abs( y2 - y1 ) < delta &&
						Math.abs( z2 - z1 ) < delta;

			}

			function mapIndices( bufGeometry, indexedBufferGeom ) {

				// Creates ammoVertices, ammoIndices and ammoIndexAssociation in bufGeometry

				var vertices = bufGeometry.attributes.position.array;
				var idxVertices = indexedBufferGeom.attributes.position.array;
				var indices = indexedBufferGeom.index.array;

				var numIdxVertices = idxVertices.length / 3;
				var numVertices = vertices.length / 3;

				bufGeometry.ammoVertices = idxVertices;
				bufGeometry.ammoIndices = indices;
				bufGeometry.ammoIndexAssociation = [];

				for ( var i = 0; i < numIdxVertices; i ++ ) {

					var association = [];
					bufGeometry.ammoIndexAssociation.push( association );

					var i3 = i * 3;

					for ( var j = 0; j < numVertices; j ++ ) {

						var j3 = j * 3;
						if ( isEqual( idxVertices[ i3 ], idxVertices[ i3 + 1 ], idxVertices[ i3 + 2 ],
							vertices[ j3 ], vertices[ j3 + 1 ], vertices[ j3 + 2 ] ) ) {

							association.push( j3 );

						}

					}

				}

			}

			function createSoftVolume( bufferGeom, mass, pressure ) {

				processGeometry( bufferGeom );

				var volume = new THREE.Mesh( bufferGeom, new THREE.MeshPhongMaterial( { color: 0xFFFFFF } ) );
				volume.castShadow = true;
				volume.receiveShadow = true;
				volume.frustumCulled = false;
				scene.add( volume );

				textureLoader.load( "textures/colors.png", function ( texture ) {

					volume.material.map = texture;
					volume.material.needsUpdate = true;

				} );

				// Volume physic object

				var volumeSoftBody = softBodyHelpers.CreateFromTriMesh(
					physicsWorld.getWorldInfo(),
					bufferGeom.ammoVertices,
					bufferGeom.ammoIndices,
					bufferGeom.ammoIndices.length / 3,
					true );

				var sbConfig = volumeSoftBody.get_m_cfg();
				sbConfig.set_viterations( 40 );
				sbConfig.set_piterations( 40 );

				// Soft-soft and soft-rigid collisions
				sbConfig.set_collisions( 0x11 );

				// Friction
				sbConfig.set_kDF( 0.1 );
				// Damping
				sbConfig.set_kDP( 0.01 );
				// Pressure
				sbConfig.set_kPR( pressure );
				// Stiffness
				volumeSoftBody.get_m_materials().at( 0 ).set_m_kLST( 0.9 );
				volumeSoftBody.get_m_materials().at( 0 ).set_m_kAST( 0.9 );

				volumeSoftBody.setTotalMass( mass, false );
				Ammo.castObject( volumeSoftBody, Ammo.btCollisionObject ).getCollisionShape().setMargin( margin );
				physicsWorld.addSoftBody( volumeSoftBody, 1, - 1 );
				volume.userData.physicsBody = volumeSoftBody;
				// Disable deactivation
				volumeSoftBody.setActivationState( 4 );

				softBodies.push( volume );

			}

			function createParalellepiped( sx, sy, sz, mass, pos, quat, material ) {

				var threeObject = new THREE.Mesh( new THREE.BoxBufferGeometry( sx, sy, sz, 1, 1, 1 ), material );
				var shape = new Ammo.btBoxShape( new Ammo.btVector3( sx * 0.5, sy * 0.5, sz * 0.5 ) );
				shape.setMargin( margin );

				createRigidBody( threeObject, shape, mass, pos, quat );

				return threeObject;

			}

			function createRigidBody( threeObject, physicsShape, mass, pos, quat ) {

				threeObject.position.copy( pos );
				threeObject.quaternion.copy( quat );

				var transform = new Ammo.btTransform();
				transform.setIdentity();
				transform.setOrigin( new Ammo.btVector3( pos.x, pos.y, pos.z ) );
				transform.setRotation( new Ammo.btQuaternion( quat.x, quat.y, quat.z, quat.w ) );
				var motionState = new Ammo.btDefaultMotionState( transform );

				var localInertia = new Ammo.btVector3( 0, 0, 0 );
				physicsShape.calculateLocalInertia( mass, localInertia );

				var rbInfo = new Ammo.btRigidBodyConstructionInfo( mass, motionState, physicsShape, localInertia );
				var body = new Ammo.btRigidBody( rbInfo );

				threeObject.userData.physicsBody = body;

				scene.add( threeObject );

				if ( mass > 0 ) {

					rigidBodies.push( threeObject );

					// Disable deactivation
					body.setActivationState( 4 );

				}

				physicsWorld.addRigidBody( body );

				return body;

			}

			function initInput() {

				window.addEventListener( 'mousedown', function ( event ) {

					if ( ! clickRequest ) {

						mouseCoords.set(
							( event.clientX / window.innerWidth ) * 2 - 1,
							- ( event.clientY / window.innerHeight ) * 2 + 1
						);

						clickRequest = true;

					}

				}, false );

			}

			function processClick() {

				if ( clickRequest ) {

					raycaster.setFromCamera( mouseCoords, camera );

					// Creates a ball
					var ballMass = 3;
					var ballRadius = 0.4;

					var ball = new THREE.Mesh( new THREE.SphereBufferGeometry( ballRadius, 18, 16 ), ballMaterial );
					ball.castShadow = true;
					ball.receiveShadow = true;
					var ballShape = new Ammo.btSphereShape( ballRadius );
					ballShape.setMargin( margin );
					pos.copy( raycaster.ray.direction );
					pos.add( raycaster.ray.origin );
					quat.set( 0, 0, 0, 1 );
					var ballBody = createRigidBody( ball, ballShape, ballMass, pos, quat );
					ballBody.setFriction( 0.5 );

					pos.copy( raycaster.ray.direction );
					pos.multiplyScalar( 14 );
					ballBody.setLinearVelocity( new Ammo.btVector3( pos.x, pos.y, pos.z ) );

					clickRequest = false;

				}

			}

			function onWindowResize() {

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );

			}

			function animate() {

				requestAnimationFrame( animate );

				render();
				stats.update();

			}

			function render() {

				var deltaTime = clock.getDelta();

				updatePhysics( deltaTime );

				processClick();

				renderer.render( scene, camera );

			}

			function updatePhysics( deltaTime ) {

				// Step world
				physicsWorld.stepSimulation( deltaTime, 10 );

				// Update soft volumes
				for ( var i = 0, il = softBodies.length; i < il; i ++ ) {

					var volume = softBodies[ i ];
					var geometry = volume.geometry;
					var softBody = volume.userData.physicsBody;
					var volumePositions = geometry.attributes.position.array;
					var volumeNormals = geometry.attributes.normal.array;
					var association = geometry.ammoIndexAssociation;
					var numVerts = association.length;
					var nodes = softBody.get_m_nodes();
					for ( var j = 0; j < numVerts; j ++ ) {

						var node = nodes.at( j );
						var nodePos = node.get_m_x();
						var x = nodePos.x();
						var y = nodePos.y();
						var z = nodePos.z();
						var nodeNormal = node.get_m_n();
						var nx = nodeNormal.x();
						var ny = nodeNormal.y();
						var nz = nodeNormal.z();

						var assocVertex = association[ j ];

						for ( var k = 0, kl = assocVertex.length; k < kl; k ++ ) {

							var indexVertex = assocVertex[ k ];
							volumePositions[ indexVertex ] = x;
							volumeNormals[ indexVertex ] = nx;
							indexVertex ++;
							volumePositions[ indexVertex ] = y;
							volumeNormals[ indexVertex ] = ny;
							indexVertex ++;
							volumePositions[ indexVertex ] = z;
							volumeNormals[ indexVertex ] = nz;

						}

					}

					geometry.attributes.position.needsUpdate = true;
					geometry.attributes.normal.needsUpdate = true;

				}

				// Update rigid bodies
				for ( var i = 0, il = rigidBodies.length; i < il; i ++ ) {

					var objThree = rigidBodies[ i ];
					var objPhys = objThree.userData.physicsBody;
					var ms = objPhys.getMotionState();
					if ( ms ) {

						ms.getWorldTransform( transformAux1 );
						var p = transformAux1.getOrigin();
						var q = transformAux1.getRotation();
						objThree.position.set( p.x(), p.y(), p.z() );
						objThree.quaternion.set( q.x(), q.y(), q.z(), q.w() );

					}

				}

			}

		</script>

	</body>
</html>
Source URL: https://github.com/mrdoob/three.js/blob/master/examples/webgl_physics_volume.html

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

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

375

376

377

378

379

380

381

382

383

384

385

386

387

388

389

390

391

392

393

394

395

396

397

398

399

400

401

402

403

404

405

406

407

408

409

410

411

412

413

414

415

416

417

418

419

420

421

422

423

424

425

426

427

428

429

430

431

432

433

434

435

436

437

438

439

440

441

442

443

444

445

446

447

448

449

450

451

452

453

454

455

456

457

458

459

460

461

462

463

464

465

466

467

468

469

470

471

472

473

474

475

476

477

478

479

480

481

482

483

484

485

486

487

488

489

490

491

492

493

494

495

496

497

498

499

500

501

502

503

504

505

<head>

<title>Ammo.js softbody volume demo</title>

<style>

body {

color: #333;

}

</style>

</head>

<body>

Ammo.js physics soft body volume demo<br/>

Click to throw a ball

</div>

if ( WEBGL.isWebGLAvailable() === false ) {

document.body.appendChild( WEBGL.getWebGLErrorMessage() );

}

// Graphics variables

var container, stats;

var camera, controls, scene, renderer;

var textureLoader;

var clock = new THREE.Clock();

var clickRequest = false;

var mouseCoords = new THREE.Vector2();

var raycaster = new THREE.Raycaster();

var ballMaterial = new THREE.MeshPhongMaterial( { color: 0x202020 } );

var pos = new THREE.Vector3();

var quat = new THREE.Quaternion();

// Physics variables

var gravityConstant = - 9.8;

var physicsWorld;

var rigidBodies = [];

var softBodies = [];

var margin = 0.05;

var transformAux1;

var softBodyHelpers;

Ammo().then( function( AmmoLib ) {

Ammo = AmmoLib;

init();

animate();

} );

function init() {

initGraphics();

initPhysics();

createObjects();

initInput();

}

function initGraphics() {

container = document.getElementById( 'container' );

camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 0.2, 2000 );

scene = new THREE.Scene();

scene.background = new THREE.Color( 0xbfd1e5 );

camera.position.set( - 7, 5, 8 );

renderer = new THREE.WebGLRenderer();

renderer.setPixelRatio( window.devicePixelRatio );

renderer.setSize( window.innerWidth, window.innerHeight );

renderer.shadowMap.enabled = true;

container.appendChild( renderer.domElement );

controls = new THREE.OrbitControls( camera, renderer.domElement );

controls.target.set( 0, 2, 0 );

controls.update();

textureLoader = new THREE.TextureLoader();

var ambientLight = new THREE.AmbientLight( 0x404040 );

scene.add( ambientLight );

var light = new THREE.DirectionalLight( 0xffffff, 1 );

light.position.set( - 10, 10, 5 );

light.castShadow = true;

var d = 20;

light.shadow.camera.left = - d;

light.shadow.camera.right = d;

light.shadow.camera.top = d;

light.shadow.camera.bottom = - d;

light.shadow.camera.near = 2;

light.shadow.camera.far = 50;

light.shadow.mapSize.x = 1024;

light.shadow.mapSize.y = 1024;

scene.add( light );

stats = new Stats();

stats.domElement.style.position = 'absolute';

stats.domElement.style.top = '0px';

container.appendChild( stats.domElement );

window.addEventListener( 'resize', onWindowResize, false );

}

function initPhysics() {

// Physics configuration

var collisionConfiguration = new Ammo.btSoftBodyRigidBodyCollisionConfiguration();

var dispatcher = new Ammo.btCollisionDispatcher( collisionConfiguration );

var broadphase = new Ammo.btDbvtBroadphase();

var solver = new Ammo.btSequentialImpulseConstraintSolver();

var softBodySolver = new Ammo.btDefaultSoftBodySolver();

physicsWorld = new Ammo.btSoftRigidDynamicsWorld( dispatcher, broadphase, solver, collisionConfiguration, softBodySolver );

physicsWorld.setGravity( new Ammo.btVector3( 0, gravityConstant, 0 ) );

physicsWorld.getWorldInfo().set_m_gravity( new Ammo.btVector3( 0, gravityConstant, 0 ) );

transformAux1 = new Ammo.btTransform();

softBodyHelpers = new Ammo.btSoftBodyHelpers();

}

function createObjects() {

// Ground

pos.set( 0, - 0.5, 0 );

quat.set( 0, 0, 0, 1 );

var ground = createParalellepiped( 40, 1, 40, 0, pos, quat, new THREE.MeshPhongMaterial( { color: 0xFFFFFF } ) );

ground.castShadow = true;

ground.receiveShadow = true;

textureLoader.load( "textures/grid.png", function ( texture ) {

texture.wrapS = THREE.RepeatWrapping;

texture.wrapT = THREE.RepeatWrapping;

texture.repeat.set( 40, 40 );

ground.material.map = texture;

ground.material.needsUpdate = true;

} );

// Create soft volumes

var volumeMass = 15;

var sphereGeometry = new THREE.SphereBufferGeometry( 1.5, 40, 25 );

sphereGeometry.translate( 5, 5, 0 );

createSoftVolume( sphereGeometry, volumeMass, 250 );

var boxGeometry = new THREE.BoxBufferGeometry( 1, 1, 5, 4, 4, 20 );

boxGeometry.translate( - 2, 5, 0 );

createSoftVolume( boxGeometry, volumeMass, 120 );

// Ramp

pos.set( 3, 1, 0 );

quat.setFromAxisAngle( new THREE.Vector3( 0, 0, 1 ), 30 * Math.PI / 180 );

var obstacle = createParalellepiped( 10, 1, 4, 0, pos, quat, new THREE.MeshPhongMaterial( { color: 0x606060 } ) );

obstacle.castShadow = true;

obstacle.receiveShadow = true;

}

function processGeometry( bufGeometry ) {

// Ony consider the position values when merging the vertices

var posOnlyBufGeometry = new THREE.BufferGeometry();

posOnlyBufGeometry.addAttribute( 'position', bufGeometry.getAttribute( 'position' ) );

posOnlyBufGeometry.setIndex( bufGeometry.getIndex() );

// Merge the vertices so the triangle soup is converted to indexed triangles

var indexedBufferGeom = THREE.BufferGeometryUtils.mergeVertices( posOnlyBufGeometry );

// Create index arrays mapping the indexed vertices to bufGeometry vertices

mapIndices( bufGeometry, indexedBufferGeom );

}

function isEqual( x1, y1, z1, x2, y2, z2 ) {

var delta = 0.000001;

return Math.abs( x2 - x1 ) < delta &&

Math.abs( y2 - y1 ) < delta &&

Math.abs( z2 - z1 ) < delta;

}

function mapIndices( bufGeometry, indexedBufferGeom ) {

// Creates ammoVertices, ammoIndices and ammoIndexAssociation in bufGeometry

var vertices = bufGeometry.attributes.position.array;

var idxVertices = indexedBufferGeom.attributes.position.array;

var indices = indexedBufferGeom.index.array;

var numIdxVertices = idxVertices.length / 3;

var numVertices = vertices.length / 3;

bufGeometry.ammoVertices = idxVertices;

bufGeometry.ammoIndices = indices;

bufGeometry.ammoIndexAssociation = [];

for ( var i = 0; i < numIdxVertices; i ++ ) {

var association = [];

bufGeometry.ammoIndexAssociation.push( association );

var i3 = i * 3;

for ( var j = 0; j < numVertices; j ++ ) {

var j3 = j * 3;

if ( isEqual( idxVertices[ i3 ], idxVertices[ i3 + 1 ], idxVertices[ i3 + 2 ],

vertices[ j3 ], vertices[ j3 + 1 ], vertices[ j3 + 2 ] ) ) {

association.push( j3 );

}

function createSoftVolume( bufferGeom, mass, pressure ) {

processGeometry( bufferGeom );

var volume = new THREE.Mesh( bufferGeom, new THREE.MeshPhongMaterial( { color: 0xFFFFFF } ) );

volume.castShadow = true;

volume.receiveShadow = true;

volume.frustumCulled = false;

scene.add( volume );

textureLoader.load( "textures/colors.png", function ( texture ) {

volume.material.map = texture;

volume.material.needsUpdate = true;

} );

// Volume physic object

var volumeSoftBody = softBodyHelpers.CreateFromTriMesh(

physicsWorld.getWorldInfo(),

bufferGeom.ammoVertices,

bufferGeom.ammoIndices,

bufferGeom.ammoIndices.length / 3,

true );

var sbConfig = volumeSoftBody.get_m_cfg();

sbConfig.set_viterations( 40 );

sbConfig.set_piterations( 40 );

// Soft-soft and soft-rigid collisions

sbConfig.set_collisions( 0x11 );

// Friction

sbConfig.set_kDF( 0.1 );

// Damping

sbConfig.set_kDP( 0.01 );

// Pressure

sbConfig.set_kPR( pressure );

// Stiffness

volumeSoftBody.get_m_materials().at( 0 ).set_m_kLST( 0.9 );

volumeSoftBody.get_m_materials().at( 0 ).set_m_kAST( 0.9 );

volumeSoftBody.setTotalMass( mass, false );

Ammo.castObject( volumeSoftBody, Ammo.btCollisionObject ).getCollisionShape().setMargin( margin );

physicsWorld.addSoftBody( volumeSoftBody, 1, - 1 );

volume.userData.physicsBody = volumeSoftBody;

// Disable deactivation

volumeSoftBody.setActivationState( 4 );

softBodies.push( volume );

}

function createParalellepiped( sx, sy, sz, mass, pos, quat, material ) {

var threeObject = new THREE.Mesh( new THREE.BoxBufferGeometry( sx, sy, sz, 1, 1, 1 ), material );

var shape = new Ammo.btBoxShape( new Ammo.btVector3( sx * 0.5, sy * 0.5, sz * 0.5 ) );

shape.setMargin( margin );

createRigidBody( threeObject, shape, mass, pos, quat );

return threeObject;

}

function createRigidBody( threeObject, physicsShape, mass, pos, quat ) {

threeObject.position.copy( pos );

threeObject.quaternion.copy( quat );

var transform = new Ammo.btTransform();

transform.setIdentity();

transform.setOrigin( new Ammo.btVector3( pos.x, pos.y, pos.z ) );

transform.setRotation( new Ammo.btQuaternion( quat.x, quat.y, quat.z, quat.w ) );

var motionState = new Ammo.btDefaultMotionState( transform );

var localInertia = new Ammo.btVector3( 0, 0, 0 );

physicsShape.calculateLocalInertia( mass, localInertia );

var rbInfo = new Ammo.btRigidBodyConstructionInfo( mass, motionState, physicsShape, localInertia );

var body = new Ammo.btRigidBody( rbInfo );

threeObject.userData.physicsBody = body;

scene.add( threeObject );

if ( mass > 0 ) {

rigidBodies.push( threeObject );

// Disable deactivation

body.setActivationState( 4 );

}

physicsWorld.addRigidBody( body );

return body;

}

function initInput() {

window.addEventListener( 'mousedown', function ( event ) {

if ( ! clickRequest ) {

mouseCoords.set(

( event.clientX / window.innerWidth ) * 2 - 1,

- ( event.clientY / window.innerHeight ) * 2 + 1

);

clickRequest = true;

}

}, false );

}

function processClick() {

if ( clickRequest ) {

raycaster.setFromCamera( mouseCoords, camera );

// Creates a ball

var ballMass = 3;

var ballRadius = 0.4;

var ball = new THREE.Mesh( new THREE.SphereBufferGeometry( ballRadius, 18, 16 ), ballMaterial );

ball.castShadow = true;

ball.receiveShadow = true;

var ballShape = new Ammo.btSphereShape( ballRadius );

ballShape.setMargin( margin );

pos.copy( raycaster.ray.direction );

pos.add( raycaster.ray.origin );

quat.set( 0, 0, 0, 1 );

var ballBody = createRigidBody( ball, ballShape, ballMass, pos, quat );

ballBody.setFriction( 0.5 );

pos.copy( raycaster.ray.direction );

pos.multiplyScalar( 14 );

ballBody.setLinearVelocity( new Ammo.btVector3( pos.x, pos.y, pos.z ) );

clickRequest = false;

}

function onWindowResize() {

camera.aspect = window.innerWidth / window.innerHeight;

camera.updateProjectionMatrix();

renderer.setSize( window.innerWidth, window.innerHeight );

}

function animate() {

requestAnimationFrame( animate );

render();

stats.update();

}

function render() {

var deltaTime = clock.getDelta();

updatePhysics( deltaTime );

processClick();

renderer.render( scene, camera );

}

function updatePhysics( deltaTime ) {

// Step world

physicsWorld.stepSimulation( deltaTime, 10 );

// Update soft volumes

for ( var i = 0, il = softBodies.length; i < il; i ++ ) {

var volume = softBodies[ i ];

var geometry = volume.geometry;

var softBody = volume.userData.physicsBody;

var volumePositions = geometry.attributes.position.array;

var volumeNormals = geometry.attributes.normal.array;

var association = geometry.ammoIndexAssociation;

var numVerts = association.length;

var nodes = softBody.get_m_nodes();

for ( var j = 0; j < numVerts; j ++ ) {

var node = nodes.at( j );

var nodePos = node.get_m_x();

var x = nodePos.x();

var y = nodePos.y();

var z = nodePos.z();

var nodeNormal = node.get_m_n();

var nx = nodeNormal.x();

var ny = nodeNormal.y();

var nz = nodeNormal.z();

var assocVertex = association[ j ];

for ( var k = 0, kl = assocVertex.length; k < kl; k ++ ) {

var indexVertex = assocVertex[ k ];

volumePositions[ indexVertex ] = x;

volumeNormals[ indexVertex ] = nx;

indexVertex ++;

volumePositions[ indexVertex ] = y;

volumeNormals[ indexVertex ] = ny;

indexVertex ++;

volumePositions[ indexVertex ] = z;

volumeNormals[ indexVertex ] = nz;

}

geometry.attributes.position.needsUpdate = true;

geometry.attributes.normal.needsUpdate = true;

}

// Update rigid bodies

for ( var i = 0, il = rigidBodies.length; i < il; i ++ ) {

var objThree = rigidBodies[ i ];

var objPhys = objThree.userData.physicsBody;

var ms = objPhys.getMotionState();

if ( ms ) {

ms.getWorldTransform( transformAux1 );

var p = transformAux1.getOrigin();

var q = transformAux1.getRotation();

objThree.position.set( p.x(), p.y(), p.z() );

objThree.quaternion.set( q.x(), q.y(), q.z(), q.w() );

}

</script>

</body>

</html>

Source URL: https://github.com/mrdoob/three.js/blob/master/examples/webgl_physics_volume.html

3D Webdesign: The next frontier

<!DOCTYPE html>
<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js - kinect</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<link type="text/css" rel="stylesheet" href="main.css">
	</head>
	<body>

		<script src="../build/three.js"></script>

		<script src='js/libs/dat.gui.min.js'></script>
		<script src="js/libs/stats.min.js"></script>
		<script src="js/WebGL.js"></script>

		<video id="video" loop muted crossOrigin="anonymous" webkit-playsinline style="display:none">
			<source src="textures/kinect.webm">
			<source src="textures/kinect.mp4">
		</video>

		<script id="vs" type="x-shader/x-vertex">

			uniform sampler2D map;

			uniform float width;
			uniform float height;
			uniform float nearClipping, farClipping;

			uniform float pointSize;
			uniform float zOffset;

			varying vec2 vUv;

			const float XtoZ = 1.11146; // tan( 1.0144686 / 2.0 ) * 2.0;
			const float YtoZ = 0.83359; // tan( 0.7898090 / 2.0 ) * 2.0;

			void main() {

				vUv = vec2( position.x / width, position.y / height );

				vec4 color = texture2D( map, vUv );
				float depth = ( color.r + color.g + color.b ) / 3.0;

				// Projection code by @kcmic

				float z = ( 1.0 - depth ) * (farClipping - nearClipping) + nearClipping;

				vec4 pos = vec4(
					( position.x / width - 0.5 ) * z * XtoZ,
					( position.y / height - 0.5 ) * z * YtoZ,
					- z + zOffset,
					1.0);

				gl_PointSize = pointSize;
				gl_Position = projectionMatrix * modelViewMatrix * pos;

			}

		</script>

		<script id="fs" type="x-shader/x-fragment">

			uniform sampler2D map;

			varying vec2 vUv;

			void main() {

				vec4 color = texture2D( map, vUv );
				gl_FragColor = vec4( color.r, color.g, color.b, 0.2 );

			}

		</script>

		<script>

			var container;

			var scene, camera, renderer;
			var geometry, mesh, material;
			var mouse, center;
			var stats;

			if ( WEBGL.isWebGLAvailable() ) {

				init();
				animate();

			} else {

				document.body.appendChild( WEBGL.getWebGLErrorMessage() );

			}

			function init() {

				container = document.createElement( 'div' );
				document.body.appendChild( container );

				var info = document.createElement( 'div' );
				info.id = 'info';
				info.innerHTML = '<a href="http://threejs.org" target="_blank" rel="noopener noreferrer">three.js</a> - kinect';
				document.body.appendChild( info );

				stats = new Stats();
				// container.appendChild( stats.dom );

				camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 10000 );
				camera.position.set( 0, 0, 500 );

				scene = new THREE.Scene();
				center = new THREE.Vector3();
				center.z = - 1000;

				var video = document.getElementById( 'video' );
				video.addEventListener( 'loadedmetadata', function () {

					var texture = new THREE.VideoTexture( video );
					texture.minFilter = THREE.NearestFilter;

					var width = 640, height = 480;
					var nearClipping = 850, farClipping = 4000;

					geometry = new THREE.BufferGeometry();

					var vertices = new Float32Array( width * height * 3 );

					for ( var i = 0, j = 0, l = vertices.length; i < l; i += 3, j ++ ) {

						vertices[ i ] = j % width;
						vertices[ i + 1 ] = Math.floor( j / width );

					}

					geometry.addAttribute( 'position', new THREE.BufferAttribute( vertices, 3 ) );

					material = new THREE.ShaderMaterial( {

						uniforms: {

							"map": { value: texture },
							"width": { value: width },
							"height": { value: height },
							"nearClipping": { value: nearClipping },
							"farClipping": { value: farClipping },

							"pointSize": { value: 2 },
							"zOffset": { value: 1000 }

						},
						vertexShader: document.getElementById( 'vs' ).textContent,
						fragmentShader: document.getElementById( 'fs' ).textContent,
						blending: THREE.AdditiveBlending,
						depthTest: false, depthWrite: false,
						transparent: true

					} );

					mesh = new THREE.Points( geometry, material );
					scene.add( mesh );

					var gui = new dat.GUI();
					gui.add( material.uniforms.nearClipping, 'value', 1, 10000, 1.0 ).name( 'nearClipping' );
					gui.add( material.uniforms.farClipping, 'value', 1, 10000, 1.0 ).name( 'farClipping' );
					gui.add( material.uniforms.pointSize, 'value', 1, 10, 1.0 ).name( 'pointSize' );
					gui.add( material.uniforms.zOffset, 'value', 0, 4000, 1.0 ).name( 'zOffset' );
					gui.close();


				}, false );

				video.play();

				renderer = new THREE.WebGLRenderer();
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				container.appendChild( renderer.domElement );

				mouse = new THREE.Vector3( 0, 0, 1 );

				document.addEventListener( 'mousemove', onDocumentMouseMove, false );

				//

				window.addEventListener( 'resize', onWindowResize, false );

			}

			function onWindowResize() {

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );

			}

			function onDocumentMouseMove( event ) {

				mouse.x = ( event.clientX - window.innerWidth / 2 ) * 8;
				mouse.y = ( event.clientY - window.innerHeight / 2 ) * 8;

			}

			function animate() {

				requestAnimationFrame( animate );

				render();
				stats.update();

			}

			function render() {

				camera.position.x += ( mouse.x - camera.position.x ) * 0.05;
				camera.position.y += ( - mouse.y - camera.position.y ) * 0.05;
				camera.lookAt( center );

				renderer.render( scene, camera );

			}

		</script>
	</body>
</html>
Source: https://threejs.org

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

<!DOCTYPE html>

<head>

<title>three.js - kinect</title>

</head>

<body>

</video>

uniform sampler2D map;

uniform float width;

uniform float height;

uniform float nearClipping, farClipping;

uniform float pointSize;

uniform float zOffset;

varying vec2 vUv;

const float XtoZ = 1.11146; // tan( 1.0144686 / 2.0 ) * 2.0;

const float YtoZ = 0.83359; // tan( 0.7898090 / 2.0 ) * 2.0;

void main() {

vUv = vec2( position.x / width, position.y / height );

vec4 color = texture2D( map, vUv );

float depth = ( color.r + color.g + color.b ) / 3.0;

// Projection code by @kcmic

float z = ( 1.0 - depth ) * (farClipping - nearClipping) + nearClipping;

vec4 pos = vec4(

( position.x / width - 0.5 ) * z * XtoZ,

( position.y / height - 0.5 ) * z * YtoZ,

- z + zOffset,

1.0);

gl_PointSize = pointSize;

gl_Position = projectionMatrix * modelViewMatrix * pos;

}

</script>

uniform sampler2D map;

varying vec2 vUv;

void main() {

vec4 color = texture2D( map, vUv );

gl_FragColor = vec4( color.r, color.g, color.b, 0.2 );

}

</script>

var container;

var scene, camera, renderer;

var geometry, mesh, material;

var mouse, center;

var stats;

if ( WEBGL.isWebGLAvailable() ) {

init();

animate();

} else {

document.body.appendChild( WEBGL.getWebGLErrorMessage() );

}

function init() {

container = document.createElement( 'div' );

document.body.appendChild( container );

var info = document.createElement( 'div' );

info.id = 'info';

info.innerHTML = '<a href="http://threejs.org" target="_blank" rel="noopener noreferrer">three.js</a> - kinect';

document.body.appendChild( info );

stats = new Stats();

// container.appendChild( stats.dom );

camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 10000 );

camera.position.set( 0, 0, 500 );

scene = new THREE.Scene();

center = new THREE.Vector3();

center.z = - 1000;

var video = document.getElementById( 'video' );

video.addEventListener( 'loadedmetadata', function () {

var texture = new THREE.VideoTexture( video );

texture.minFilter = THREE.NearestFilter;

var width = 640, height = 480;

var nearClipping = 850, farClipping = 4000;

geometry = new THREE.BufferGeometry();

var vertices = new Float32Array( width * height * 3 );

for ( var i = 0, j = 0, l = vertices.length; i < l; i += 3, j ++ ) {

vertices[ i ] = j % width;

vertices[ i + 1 ] = Math.floor( j / width );

}

geometry.addAttribute( 'position', new THREE.BufferAttribute( vertices, 3 ) );

material = new THREE.ShaderMaterial( {

uniforms: {

"map": { value: texture },

"width": { value: width },

"height": { value: height },

"nearClipping": { value: nearClipping },

"farClipping": { value: farClipping },

"pointSize": { value: 2 },

"zOffset": { value: 1000 }

vertexShader: document.getElementById( 'vs' ).textContent,

fragmentShader: document.getElementById( 'fs' ).textContent,

blending: THREE.AdditiveBlending,

depthTest: false, depthWrite: false,

transparent: true

} );

mesh = new THREE.Points( geometry, material );

scene.add( mesh );

var gui = new dat.GUI();

gui.add( material.uniforms.nearClipping, 'value', 1, 10000, 1.0 ).name( 'nearClipping' );

gui.add( material.uniforms.farClipping, 'value', 1, 10000, 1.0 ).name( 'farClipping' );

gui.add( material.uniforms.pointSize, 'value', 1, 10, 1.0 ).name( 'pointSize' );

gui.add( material.uniforms.zOffset, 'value', 0, 4000, 1.0 ).name( 'zOffset' );

gui.close();

}, false );

video.play();

renderer = new THREE.WebGLRenderer();

renderer.setPixelRatio( window.devicePixelRatio );

renderer.setSize( window.innerWidth, window.innerHeight );

container.appendChild( renderer.domElement );

mouse = new THREE.Vector3( 0, 0, 1 );

document.addEventListener( 'mousemove', onDocumentMouseMove, false );

window.addEventListener( 'resize', onWindowResize, false );

}

function onWindowResize() {

camera.aspect = window.innerWidth / window.innerHeight;

camera.updateProjectionMatrix();

renderer.setSize( window.innerWidth, window.innerHeight );

}

function onDocumentMouseMove( event ) {

mouse.x = ( event.clientX - window.innerWidth / 2 ) * 8;

mouse.y = ( event.clientY - window.innerHeight / 2 ) * 8;

}

function animate() {

requestAnimationFrame( animate );

render();

stats.update();

}

function render() {

camera.position.x += ( mouse.x - camera.position.x ) * 0.05;

camera.position.y += ( - mouse.y - camera.position.y ) * 0.05;

camera.lookAt( center );

renderer.render( scene, camera );

}

</script>

</body>

</html>

Source: https://threejs.org