processing/core/src/processing/core/PShapeOBJ.java at master · 2php/processing · GitHub

Repository navigation

History

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

package processing.core;

import java.io.BufferedReader;

import java.io.File;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.Map;

/**

* This class is not part of the Processing API and should not be used

* directly. Instead, use loadShape() and methods like it, which will make

* use of this class. Using this class directly will cause your code to break

* when combined with future versions of Processing.

* <p>

* OBJ loading implemented using code from Saito's OBJLoader library:

* http://code.google.com/p/saitoobjloader/

* and OBJReader from Ahmet Kizilay

* http://www.openprocessing.org/visuals/?visualID=191

public class PShapeOBJ extends PShape {

/**

* Initializes a new OBJ Object with the given filename.

public PShapeOBJ(PApplet parent, String filename) {

this(parent, parent.createReader(filename), getBasePath(parent, filename));

}

public PShapeOBJ(PApplet parent, BufferedReader reader) {

this(parent, reader, "");

}

public PShapeOBJ(PApplet parent, BufferedReader reader, String basePath) {

ArrayList<OBJFace> faces = new ArrayList<OBJFace>();

ArrayList<OBJMaterial> materials = new ArrayList<OBJMaterial>();

ArrayList<PVector> coords = new ArrayList<PVector>();

ArrayList<PVector> normals = new ArrayList<PVector>();

ArrayList<PVector> texcoords = new ArrayList<PVector>();

parseOBJ(parent, basePath, reader,

faces, materials, coords, normals, texcoords);

// The OBJ geometry is stored with each face in a separate child shape.

parent = null;

family = GROUP;

addChildren(faces, materials, coords, normals, texcoords);

}

protected PShapeOBJ(OBJFace face, OBJMaterial mtl,

ArrayList<PVector> coords,

ArrayList<PVector> normals,

ArrayList<PVector> texcoords) {

family = GEOMETRY;

if (face.vertIdx.size() == 3) {

kind = TRIANGLES;

} else if (face.vertIdx.size() == 4) {

kind = QUADS;

} else {

kind = POLYGON;

}

stroke = false;

fill = true;

// Setting material properties for the new face

fillColor = rgbaValue(mtl.kd);

ambientColor = rgbaValue(mtl.ka);

specularColor = rgbaValue(mtl.ks);

shininess = mtl.ns;

if (mtl.kdMap != null) {

// If current material is textured, then tinting the texture using the

// diffuse color.

tintColor = rgbaValue(mtl.kd, mtl.d);

}

vertexCount = face.vertIdx.size();

vertices = new float[vertexCount][12];

for (int j = 0; j < face.vertIdx.size(); j++){

int vertIdx, normIdx, texIdx;

PVector vert, norms, tex;

vert = norms = tex = null;

vertIdx = face.vertIdx.get(j).intValue() - 1;

vert = coords.get(vertIdx);

if (j < face.normIdx.size()) {

normIdx = face.normIdx.get(j).intValue() - 1;

if (-1 < normIdx) {

norms = normals.get(normIdx);

}

if (j < face.texIdx.size()) {

texIdx = face.texIdx.get(j).intValue() - 1;

if (-1 < texIdx) {

tex = texcoords.get(texIdx);

}

vertices[j][X] = vert.x;

vertices[j][Y] = vert.y;

vertices[j][Z] = vert.z;

vertices[j][PGraphics.R] = mtl.kd.x;

vertices[j][PGraphics.G] = mtl.kd.y;

vertices[j][PGraphics.B] = mtl.kd.z;

vertices[j][PGraphics.A] = 1;

if (norms != null) {

vertices[j][PGraphics.NX] = norms.x;

vertices[j][PGraphics.NY] = norms.y;

vertices[j][PGraphics.NZ] = norms.z;

}

if (tex != null) {

vertices[j][PGraphics.U] = tex.x;

vertices[j][PGraphics.V] = tex.y;

}

if (mtl != null && mtl.kdMap != null) {

image = mtl.kdMap;

}

protected void addChildren(ArrayList<OBJFace> faces,

ArrayList<OBJMaterial> materials,

ArrayList<PVector> coords,

ArrayList<PVector> normals,

ArrayList<PVector> texcoords) {

int mtlIdxCur = -1;

OBJMaterial mtl = null;

for (int i = 0; i < faces.size(); i++) {

OBJFace face = faces.get(i);

// Getting current material.

if (mtlIdxCur != face.matIdx || face.matIdx == -1) {

// To make sure that at least we get the default material

mtlIdxCur = PApplet.max(0, face.matIdx);

mtl = materials.get(mtlIdxCur);

}

// Creating child shape for current face.

PShape child = new PShapeOBJ(face, mtl, coords, normals, texcoords);

addChild(child);

}

static protected void parseOBJ(PApplet parent, String path,

BufferedReader reader,

ArrayList<OBJFace> faces,

ArrayList<OBJMaterial> materials,

ArrayList<PVector> coords,

ArrayList<PVector> normals,

ArrayList<PVector> texcoords) {

Map<String, Integer> mtlTable = new HashMap<String, Integer>();

int mtlIdxCur = -1;

boolean readv, readvn, readvt;

try {

readv = readvn = readvt = false;

String line;

String gname = "object";

while ((line = reader.readLine()) != null) {

// Parse the line.

line = line.trim();

if (line.equals("") || line.indexOf('#') == 0) {

// Empty line of comment, ignore line

continue;

}

// The below patch/hack comes from Carlos Tomas Marti and is a

// fix for single backslashes in Rhino obj files

// BEGINNING OF RHINO OBJ FILES HACK

// Statements can be broken in multiple lines using '\' at the

// end of a line.

// In regular expressions, the backslash is also an escape

// character.

// The regular expression \\ matches a single backslash. This

// regular expression as a Java string, becomes "\\\\".

// That's right: 4 backslashes to match a single one.

while (line.contains("\\")) {

line = line.split("\\\\")[0];

final String s = reader.readLine();

if (s != null)

line += s;

}

// END OF RHINO OBJ FILES HACK

String[] parts = line.split("\\s+");

// if not a blank line, process the line.

if (parts.length > 0) {

if (parts[0].equals("v")) {

// vertex

PVector tempv = new PVector(Float.valueOf(parts[1]).floatValue(),

Float.valueOf(parts[2]).floatValue(),

Float.valueOf(parts[3]).floatValue());

coords.add(tempv);

readv = true;

} else if (parts[0].equals("vn")) {

// normal

PVector tempn = new PVector(Float.valueOf(parts[1]).floatValue(),

Float.valueOf(parts[2]).floatValue(),

Float.valueOf(parts[3]).floatValue());

normals.add(tempn);

readvn = true;

} else if (parts[0].equals("vt")) {

// uv, inverting v to take into account Processing's inverted Y axis

// with respect to OpenGL.

PVector tempv = new PVector(Float.valueOf(parts[1]).floatValue(),

1 - Float.valueOf(parts[2]).

floatValue());

texcoords.add(tempv);

readvt = true;

} else if (parts[0].equals("o")) {

// Object name is ignored, for now.

} else if (parts[0].equals("mtllib")) {

if (parts[1] != null) {

String fn = parts[1];

if (fn.indexOf(File.separator) == -1 && !path.equals("")) {

// Relative file name, adding the base path.

fn = path + File.separator + fn;

}

BufferedReader mreader = parent.createReader(fn);

if (mreader != null) {

parseMTL(parent, fn, path, mreader, materials, mtlTable);

mreader.close();

}

} else if (parts[0].equals("g")) {

gname = 1 < parts.length ? parts[1] : "";

} else if (parts[0].equals("usemtl")) {

// Getting index of current active material (will be applied on

// all subsequent faces).

if (parts[1] != null) {

String mtlname = parts[1];

if (mtlTable.containsKey(mtlname)) {

Integer tempInt = mtlTable.get(mtlname);

mtlIdxCur = tempInt.intValue();

} else {

mtlIdxCur = -1;

}

} else if (parts[0].equals("f")) {

// Face setting

OBJFace face = new OBJFace();

face.matIdx = mtlIdxCur;

face.name = gname;

for (int i = 1; i < parts.length; i++) {

String seg = parts[i];

if (seg.indexOf("/") > 0) {

String[] forder = seg.split("/");

if (forder.length > 2) {

// Getting vertex and texture and normal indexes.

if (forder[0].length() > 0 && readv) {

face.vertIdx.add(Integer.valueOf(forder[0]));

}

if (forder[1].length() > 0 && readvt) {

face.texIdx.add(Integer.valueOf(forder[1]));

}

if (forder[2].length() > 0 && readvn) {

face.normIdx.add(Integer.valueOf(forder[2]));

}

} else if (forder.length > 1) {

// Getting vertex and texture/normal indexes.

if (forder[0].length() > 0 && readv) {

face.vertIdx.add(Integer.valueOf(forder[0]));

}

if (forder[1].length() > 0) {

if (readvt) {

face.texIdx.add(Integer.valueOf(forder[1]));

} else if (readvn) {

face.normIdx.add(Integer.valueOf(forder[1]));

}

} else if (forder.length > 0) {

// Getting vertex index only.

if (forder[0].length() > 0 && readv) {

face.vertIdx.add(Integer.valueOf(forder[0]));

}

} else {

// Getting vertex index only.

if (seg.length() > 0 && readv) {

face.vertIdx.add(Integer.valueOf(seg));

}

faces.add(face);

}

if (materials.size() == 0) {

// No materials definition so far. Adding one default material.

OBJMaterial defMtl = new OBJMaterial();

materials.add(defMtl);

}

} catch (Exception e) {

e.printStackTrace();

}

static protected void parseMTL(PApplet parent, String mtlfn, String path,

BufferedReader reader,

ArrayList<OBJMaterial> materials,

Map<String, Integer> materialsHash) {

try {

String line;

OBJMaterial currentMtl = null;

while ((line = reader.readLine()) != null) {

// Parse the line

line = line.trim();

String parts[] = line.split("\\s+");

if (parts.length > 0) {

// Extract the material data.

if (parts[0].equals("newmtl")) {

// Starting new material.

String mtlname = parts[1];

currentMtl = addMaterial(mtlname, materials, materialsHash);

} else {

if (currentMtl == null) {

currentMtl = addMaterial("material" + materials.size(),

materials, materialsHash);

}

if (parts[0].equals("map_Kd") && parts.length > 1) {

// Loading texture map.

String texname = parts[1];

if (texname.indexOf(File.separator) == -1 && !path.equals("")) {

// Relative file name, adding the base path.

texname = path + File.separator + texname;

}

File file = new File(parent.dataPath(texname));

if (file.exists()) {

currentMtl.kdMap = parent.loadImage(texname);

} else {

System.err.println("The texture map \"" + texname + "\" " +

"in the materials definition file \"" + mtlfn + "\" " +

"is missing or inaccessible, make sure " +

"the URL is valid or that the file has been " +

"added to your sketch and is readable.");

}

} else if (parts[0].equals("Ka") && parts.length > 3) {

// The ambient color of the material

currentMtl.ka.x = Float.valueOf(parts[1]).floatValue();

currentMtl.ka.y = Float.valueOf(parts[2]).floatValue();

currentMtl.ka.z = Float.valueOf(parts[3]).floatValue();

} else if (parts[0].equals("Kd") && parts.length > 3) {

// The diffuse color of the material

currentMtl.kd.x = Float.valueOf(parts[1]).floatValue();

currentMtl.kd.y = Float.valueOf(parts[2]).floatValue();

currentMtl.kd.z = Float.valueOf(parts[3]).floatValue();

} else if (parts[0].equals("Ks") && parts.length > 3) {

// The specular color weighted by the specular coefficient

currentMtl.ks.x = Float.valueOf(parts[1]).floatValue();

currentMtl.ks.y = Float.valueOf(parts[2]).floatValue();

currentMtl.ks.z = Float.valueOf(parts[3]).floatValue();

} else if ((parts[0].equals("d") ||

parts[0].equals("Tr")) && parts.length > 1) {

// Reading the alpha transparency.

currentMtl.d = Float.valueOf(parts[1]).floatValue();

} else if (parts[0].equals("Ns") && parts.length > 1) {

// The specular component of the Phong shading model

currentMtl.ns = Float.valueOf(parts[1]).floatValue();

}

} catch (Exception e) {

e.printStackTrace();

}

protected static OBJMaterial addMaterial(String mtlname,

ArrayList<OBJMaterial> materials,

Map<String, Integer> materialsHash) {

OBJMaterial currentMtl = new OBJMaterial(mtlname);

materialsHash.put(mtlname, Integer.valueOf(materials.size()));

materials.add(currentMtl);

return currentMtl;

}

protected static int rgbaValue(PVector color) {

return 0xFF000000 | ((int)(color.x * 255) << 16) |

((int)(color.y * 255) << 8) |

(int)(color.z * 255);

}

protected static int rgbaValue(PVector color, float alpha) {

return ((int)(alpha * 255) << 24) |

((int)(color.x * 255) << 16) |

((int)(color.y * 255) << 8) |

(int)(color.z * 255);

}

// Stores a face from an OBJ file

static protected class OBJFace {

ArrayList<Integer> vertIdx;

ArrayList<Integer> texIdx;

ArrayList<Integer> normIdx;

int matIdx;

String name;

OBJFace() {

vertIdx = new ArrayList<Integer>();

texIdx = new ArrayList<Integer>();

normIdx = new ArrayList<Integer>();

matIdx = -1;

name = "";

}

static protected String getBasePath(PApplet parent, String filename) {

// Obtaining the path

File file = new File(parent.dataPath(filename));

if (!file.exists()) {

file = parent.sketchFile(filename);

}

String absolutePath = file.getAbsolutePath();

return absolutePath.substring(0,

absolutePath.lastIndexOf(File.separator));

}

// Stores a material defined in an MTL file.

static protected class OBJMaterial {

String name;

PVector ka;

PVector kd;

PVector ks;

float d;

float ns;

PImage kdMap;

OBJMaterial() {

this("default");

}

OBJMaterial(String name) {

this.name = name;

ka = new PVector(0.5f, 0.5f, 0.5f);

kd = new PVector(0.5f, 0.5f, 0.5f);

ks = new PVector(0.5f, 0.5f, 0.5f);

d = 1.0f;

ns = 0.0f;

kdMap = null;

}

processing/core/src/processing/core/PShapeOBJ.java at master · 2php/processing · GitHub

Repository navigation

Expand file tree

Breadcrumbs

PShapeOBJ.java

Latest commit

History

Breadcrumbs

PShapeOBJ.java

File metadata and controls