goat3d: ae6c5941faac goatview/src/goatview.cc

goat3d

view goatview/src/goatview.cc @ 92:ae6c5941faac

[goatview] makefile rules to create app bundle and dmg archive [goatview] creating multisampling context

author	John Tsiombikas <nuclear@member.fsf.org>
date	Sun, 18 May 2014 01:19:10 +0300
parents	8b156bc5205b
children	07c0ec4a410d

line source

1 #include <stdio.h>

2 #include <map>

3 #include "opengl.h"

4 #include <QtOpenGL/QtOpenGL>

5 #include <vmath/vmath.h>

6 #include "goatview.h"

7 #include "goat3d.h"

9 static void draw_grid();

10 static void draw_grid(float sz, int nlines, float alpha = 1.0f);

11 static void draw_node(goat3d_node *node);

12 static void draw_mesh(goat3d_mesh *mesh);

13 static int next_pow2(int x);

15 goat3d *scene;

16 static SceneModel *sdata;

17 static GoatViewport *glview;

19 static long anim_time;

20 static float cam_theta, cam_phi = 25, cam_dist = 8;

21 static float fov = 60.0;

22 static bool use_nodes = true;

23 static bool use_lighting = true;

24 static bool use_textures = true;

26 void post_redisplay()

27 {

28 if(glview) {

29 glview->updateGL();

30 }

31 }

34 GoatView::GoatView()

35 {

36 glview = 0;

37 scene_model = 0;

39 QGLFormat glfmt = QGLFormat::defaultFormat();

40 glfmt.setSampleBuffers(true);

41 QGLFormat::setDefaultFormat(glfmt);

43 QSettings settings;

44 resize(settings.value("main/size", QSize(1024, 768)).toSize());

45 move(settings.value("main/pos", QPoint(100, 100)).toPoint());

46 use_nodes = settings.value("use_nodes", true).toBool();

47 use_lighting = settings.value("use_lighting", true).toBool();

48 use_textures = settings.value("use_textures", true).toBool();

50 make_center(); // must be first

51 make_menu();

52 make_dock();

54 statusBar();

56 setWindowTitle("GoatView");

57 }

59 GoatView::~GoatView()

60 {

61 delete scene_model;

62 sdata = 0;

63 }

65 void GoatView::closeEvent(QCloseEvent *ev)

66 {

67 QSettings settings;

68 settings.setValue("main/size", size());

69 settings.setValue("main/pos", pos());

70 settings.setValue("use_nodes", use_nodes);

71 settings.setValue("use_lighting", use_lighting);

72 }

75 bool GoatView::load_scene(const char *fname)

76 {

77 if(scene) {

78 goat3d_free(scene);

79 }

80 if(!(scene = goat3d_create()) || goat3d_load(scene, fname) == -1) {

81 return false;

82 }

84 float bmin[3], bmax[3];

85 if(goat3d_get_bounds(scene, bmin, bmax) != -1) {

86 float bsize = (Vector3(bmax[0], bmax[1], bmax[2]) - Vector3(bmin[0], bmin[1], bmin[2])).length();

87 cam_dist = bsize / tan(DEG_TO_RAD(fov) / 2.0);

88 printf("bounds size: %f, cam_dist: %f\n", bsize, cam_dist);

89 }

91 scene_model->set_scene(scene);

92 treeview->expandAll();

93 treeview->resizeColumnToContents(0);

95 sdata = scene_model; // set the global sdata ptr

96 return true;

97 }

99 bool GoatView::make_menu()

100 {

101 // file menu

102 QMenu *menu_file = menuBar()->addMenu("&File");

103

104 QAction *act_open_sce = new QAction("&Open Scene", this);

105 act_open_sce->setShortcuts(QKeySequence::Open);

106 connect(act_open_sce, &QAction::triggered, this, &GoatView::open_scene);

107 menu_file->addAction(act_open_sce);

108

109 QAction *act_open_anm = new QAction("Open &Animation", this);

110 connect(act_open_anm, &QAction::triggered, this, &GoatView::open_anim);

111 menu_file->addAction(act_open_anm);

112

113 QAction *act_quit = new QAction("&Quit", this);

114 act_quit->setShortcuts(QKeySequence::Quit);

115 connect(act_quit, &QAction::triggered, [&](){ qApp->quit(); });

116 menu_file->addAction(act_quit);

117

118 // view menu

119 QMenu *menu_view = menuBar()->addMenu("&View");

120

121 QAction *act_use_nodes = new QAction("use nodes", this);

122 act_use_nodes->setCheckable(true);

123 act_use_nodes->setChecked(use_nodes);

124 connect(act_use_nodes, &QAction::triggered, this,

125 [&](){ use_nodes = !use_nodes; post_redisplay(); });

126 menu_view->addAction(act_use_nodes);

127

128 QAction *act_use_lighting = new QAction("lighting", this);

129 act_use_lighting->setCheckable(true);

130 act_use_lighting->setChecked(use_lighting);

131 connect(act_use_lighting, &QAction::triggered, glview, &GoatViewport::toggle_lighting);

132 menu_view->addAction(act_use_lighting);

133

134 // help menu

135 QMenu *menu_help = menuBar()->addMenu("&Help");

136

137 QAction *act_about = new QAction("&About", this);

138 connect(act_about, &QAction::triggered, this, &GoatView::show_about);

139 menu_help->addAction(act_about);

140 return true;

141 }

142

143 bool GoatView::make_dock()

144 {

145 // ---- side-dock ----

146 QWidget *dock_cont = new QWidget;

147 QVBoxLayout *dock_vbox = new QVBoxLayout;

148 dock_cont->setLayout(dock_vbox);

149

150 QDockWidget *dock = new QDockWidget(this);

151 dock->setAllowedAreas(Qt::LeftDockWidgetArea | Qt::RightDockWidgetArea);

152 dock->setWidget(dock_cont);

153 addDockWidget(Qt::LeftDockWidgetArea, dock);

154

155 // make the tree view widget

156 treeview = new QTreeView;

157 treeview->setAlternatingRowColors(true);

158 treeview->setSelectionMode(QAbstractItemView::SingleSelection);

159 dock_vbox->addWidget(treeview);

160

161 scene_model = new SceneModel;

162 connect(scene_model, &SceneModel::dataChanged, [&](){ post_redisplay(); });

163 treeview->setModel(scene_model);

164

165 connect(treeview->selectionModel(), &QItemSelectionModel::selectionChanged,

166 [&](){ scene_model->selchange(treeview->selectionModel()->selectedIndexes()); });

167

168 // misc

169 QPushButton *bn_quit = new QPushButton("quit");

170 dock_vbox->addWidget(bn_quit);

171 connect(bn_quit, &QPushButton::clicked, [&](){ qApp->quit(); });

172

173 // ---- bottom dock ----

174 dock_cont = new QWidget;

175 QHBoxLayout *dock_hbox = new QHBoxLayout;

176 dock_cont->setLayout(dock_hbox);

177

178 // animation control box

179 QGridLayout *anim_ctl_box = new QGridLayout;

180 dock_hbox->addLayout(anim_ctl_box);

181

182 anim_ctl_box->addWidget(new QLabel("Animation"), 0, 0);

183 cbox_anims = new QComboBox;

184 cbox_anims->setDisabled(true);

185 anim_ctl_box->addWidget(cbox_anims, 0, 1);

186

187 chk_loop = new QCheckBox("loop");

188 chk_loop->setChecked(false);

189 anim_ctl_box->addWidget(chk_loop, 1, 0);

190

191 QToolBar *toolbar_ctl = new QToolBar;

192 anim_ctl_box->addWidget(toolbar_ctl, 1, 1);

193

194 act_rewind = new QAction(style()->standardIcon(QStyle::SP_MediaSkipBackward), "Rewind", this);

195 act_rewind->setDisabled(true);

196 toolbar_ctl->addAction(act_rewind);

197 act_play = new QAction(style()->standardIcon(QStyle::SP_MediaPlay), "Play", this);

198 act_play->setDisabled(true);

199 toolbar_ctl->addAction(act_play);

200

201 // timeline slider

202 slider_time = new QSlider(Qt::Orientation::Horizontal);

203 slider_time->setDisabled(true);

204 connect(slider_time, &QSlider::valueChanged,

205 [&](){ anim_time = slider_time->value(); post_redisplay(); });

206 dock_hbox->addWidget(slider_time);

207

208 dock = new QDockWidget(this);

209 dock->setAllowedAreas(Qt::BottomDockWidgetArea);

210 dock->setWidget(dock_cont);

211 addDockWidget(Qt::BottomDockWidgetArea, dock);

212

213 return true;

214 }

215

216 bool GoatView::make_center()

217 {

218 glview = ::glview = new GoatViewport(this);

219 setCentralWidget(glview);

220 return true;

221 }

222

223 void GoatView::open_scene()

224 {

225 std::string fname = QFileDialog::getOpenFileName(this, "Open scene file", "",

226 "Goat3D Scene (*.goatsce);;All Files (*)").toStdString();

227 if(fname.empty()) {

228 statusBar()->showMessage("Abort: No file selected!");

229 return;

230 }

231

232 statusBar()->showMessage("opening scene file");

233 if(!load_scene(fname.c_str())) {

234 statusBar()->showMessage("failed to load scene file");

235 }

236 }

237

238 void GoatView::open_anim()

239 {

240 statusBar()->showMessage("opening animation...");

241 }

242

243

244 // ---- OpenGL viewport ----

245 GoatViewport::GoatViewport(QWidget *main_win)

246 : QGLWidget(QGLFormat(QGL::DepthBuffer | QGL::SampleBuffers))

247 {

248 this->main_win = main_win;

249 initialized = false;

250 }

251

252 GoatViewport::~GoatViewport()

253 {

254 }

255

256 QSize GoatViewport::sizeHint() const

257 {

258 return QSize(800, 600);

259 }

260

261 #define CRITICAL(error, detail) \

262 do { \

263 fprintf(stderr, "%s: %s\n", error, detail); \

264 QMessageBox::critical(main_win, error, detail); \

265 abort(); \

266 } while(0)

267

268 void GoatViewport::initializeGL()

269 {

270 if(initialized) return;

271 initialized = true;

272

273 init_opengl();

274

275 if(!GLEW_ARB_transpose_matrix) {

276 CRITICAL("OpenGL initialization failed", "ARB_transpose_matrix extension not found!");

277 }

278

279 glClearColor(0.1f, 0.1f, 0.1f, 1.0f);

280

281 glEnable(GL_DEPTH_TEST);

282 glEnable(GL_CULL_FACE);

283 if(use_lighting) {

284 glEnable(GL_LIGHTING);

285 }

286 glEnable(GL_LIGHT0);

287

288 float ldir[] = {-1, 1, 2, 0};

289 glLightfv(GL_LIGHT0, GL_POSITION, ldir);

290

291 glEnable(GL_MULTISAMPLE);

292 }

293

294 void GoatViewport::resizeGL(int xsz, int ysz)

295 {

296 glViewport(0, 0, xsz, ysz);

297 glMatrixMode(GL_PROJECTION);

298 glLoadIdentity();

299 gluPerspective(60.0, (float)xsz / (float)ysz, 0.5, 5000.0);

300 }

301

302 void GoatViewport::paintGL()

303 {

304 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

305

306 glMatrixMode(GL_MODELVIEW);

307 glLoadIdentity();

308 glTranslatef(0, 0, -cam_dist);

309 glRotatef(cam_phi, 1, 0, 0);

310 glRotatef(cam_theta, 0, 1, 0);

311

312 draw_grid();

313

314 if(!scene) return;

315

316 if(use_nodes) {

317 int node_count = goat3d_get_node_count(scene);

318 for(int i=0; i<node_count; i++) {

319 goat3d_node *node = goat3d_get_node(scene, i);

320 if(!goat3d_get_node_parent(node)) {

321 draw_node(node); // only draw root nodes, the rest will be drawn recursively

322 }

323 }

324 } else {

325 int mesh_count = goat3d_get_mesh_count(scene);

326 for(int i=0; i<mesh_count; i++) {

327 goat3d_mesh *mesh = goat3d_get_mesh(scene, i);

328 draw_mesh(mesh);

329 }

330 }

331 }

332

333 void GoatViewport::toggle_lighting()

334 {

335 use_lighting = !use_lighting;

336 if(use_lighting) {

337 glEnable(GL_LIGHTING);

338 } else {

339 glDisable(GL_LIGHTING);

340 }

341 updateGL();

342 }

343

344 #ifndef GLEW_ARB_transpose_matrix

345 #error "GLEW_ARB_transpose_matrix undefined?"

346 #endif

347

348 static void draw_grid()

349 {

350 float viewsz_orig = cam_dist * tan(DEG_TO_RAD(fov) / 2.0);

351 float sz1 = next_pow2((int)viewsz_orig);

352 float sz0 = sz1 / 2.0;

353 float t = (viewsz_orig - sz0) / (sz1 - sz0);

354 float alpha = t < 0.333333 ? 0.0 : (t > 0.666666 ? 1.0 : (t - 0.333333) / 0.333333);

355

356 glPushAttrib(GL_ENABLE_BIT | GL_DEPTH_BITS);

357

358 glEnable(GL_BLEND);

359 glDepthFunc(GL_ALWAYS);

360

361 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

362 draw_grid(sz0 * 2.0, 10, 1.0 - alpha);

363 draw_grid(sz1 * 2.0, 10, alpha);

364

365 glPopAttrib();

366 }

367

368 static void draw_grid(float sz, int nlines, float alpha)

369 {

370 float hsz = sz / 2.0;

371 float offs = sz / (float)nlines;

372

373 glPushAttrib(GL_ENABLE_BIT);

374 glDisable(GL_LIGHTING);

375 glDisable(GL_TEXTURE_2D);

376

377 glLineWidth(2.0);

378 glBegin(GL_LINES);

379 glColor4f(1, 0, 0, alpha);

380 glVertex3f(-hsz, 0, 0);

381 glVertex3f(hsz, 0, 0);

382 glColor4f(0, 0, 1, alpha);

383 glVertex3f(0, 0, -hsz);

384 glVertex3f(0, 0, hsz);

385 glEnd();

386

387 glLineWidth(1.0);

388 glBegin(GL_LINES);

389 glColor4f(0.5, 0.5, 0.5, alpha);

390 for(int i=0; i<nlines / 2; i++) {

391 float dist = (float)(i + 1) * offs;

392 for(int j=0; j<2; j++) {

393 float sign = j > 0 ? -1.0 : 1.0;

394 glVertex3f(-hsz, 0, dist * sign);

395 glVertex3f(hsz, 0, dist * sign);

396 glVertex3f(dist * sign, 0, -hsz);

397 glVertex3f(dist * sign, 0, hsz);

398 }

399 }

400 glEnd();

401

402 glPopAttrib();

403 }

404

405 static void draw_node(goat3d_node *node)

406 {

407 SceneNodeData *data = sdata ? sdata->get_node_data(node) : 0;

408 if(!data) return;

409

410 float xform[16];

411 goat3d_get_node_matrix(node, xform, anim_time);

412

413 glPushMatrix();

414 glMultTransposeMatrixf(xform);

415

416 if(data->visible) {

417 if(goat3d_get_node_type(node) == GOAT3D_NODE_MESH) {

418 goat3d_mesh *mesh = (goat3d_mesh*)goat3d_get_node_object(node);

419

420 draw_mesh(mesh);

421

422 if(data->selected) {

423 float bmin[3], bmax[3];

424 goat3d_get_mesh_bounds(mesh, bmin, bmax);

425

426 glPushAttrib(GL_ENABLE_BIT);

427 glDisable(GL_LIGHTING);

428

429 glColor3f(0.3, 1, 0.2);

430

431 glBegin(GL_LINE_LOOP);

432 glVertex3f(bmin[0], bmin[1], bmin[2]);

433 glVertex3f(bmax[0], bmin[1], bmin[2]);

434 glVertex3f(bmax[0], bmin[1], bmax[2]);

435 glVertex3f(bmin[0], bmin[1], bmax[2]);

436 glEnd();

437 glBegin(GL_LINE_LOOP);

438 glVertex3f(bmin[0], bmax[1], bmin[2]);

439 glVertex3f(bmax[0], bmax[1], bmin[2]);

440 glVertex3f(bmax[0], bmax[1], bmax[2]);

441 glVertex3f(bmin[0], bmax[1], bmax[2]);

442 glEnd();

443 glBegin(GL_LINES);

444 glVertex3f(bmin[0], bmin[1], bmin[2]);

445 glVertex3f(bmin[0], bmax[1], bmin[2]);

446 glVertex3f(bmin[0], bmin[1], bmax[2]);

447 glVertex3f(bmin[0], bmax[1], bmax[2]);

448 glVertex3f(bmax[0], bmin[1], bmin[2]);

449 glVertex3f(bmax[0], bmax[1], bmin[2]);

450 glVertex3f(bmax[0], bmin[1], bmax[2]);

451 glVertex3f(bmax[0], bmax[1], bmax[2]);

452 glEnd();

453

454 glPopAttrib();

455 }

456 }

457 }

458

459 int num_child = goat3d_get_node_child_count(node);

460 for(int i=0; i<num_child; i++) {

461 draw_node(goat3d_get_node_child(node, i));

462 }

463

464 glPopMatrix();

465 }

466

467 static void draw_mesh(goat3d_mesh *mesh)

468 {

469 static const float white[] = {1, 1, 1, 1};

470 static const float black[] = {0, 0, 0, 1};

471

472 const float *color;

473 goat3d_material *mtl = goat3d_get_mesh_mtl(mesh);

474

475 if(mtl && (color = goat3d_get_mtl_attrib(mtl, GOAT3D_MAT_ATTR_DIFFUSE))) {

476 glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, color);

477 glColor3fv(color);

478 } else {

479 glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, white);

480 glColor3fv(white);

481 }

482 if(mtl && (color = goat3d_get_mtl_attrib(mtl, GOAT3D_MAT_ATTR_SPECULAR))) {

483 glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, color);

484 } else {

485 glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, black);

486 }

487 if(mtl && (color = goat3d_get_mtl_attrib(mtl, GOAT3D_MAT_ATTR_SHININESS))) {

488 glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, color[0]);

489 } else {

490 glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 60.0);

491 }

492 // TODO texture

493

494

495 int num_faces = goat3d_get_mesh_face_count(mesh);

496 int num_verts = goat3d_get_mesh_attrib_count(mesh, GOAT3D_MESH_ATTR_VERTEX);

497

498 glEnableClientState(GL_VERTEX_ARRAY);

499 glVertexPointer(3, GL_FLOAT, 0, goat3d_get_mesh_attribs(mesh, GOAT3D_MESH_ATTR_VERTEX));

500

501 float *data;

502 if((data = (float*)goat3d_get_mesh_attribs(mesh, GOAT3D_MESH_ATTR_NORMAL))) {

503 glEnableClientState(GL_NORMAL_ARRAY);

504 glNormalPointer(GL_FLOAT, 0, data);

505 }

506 if((data = (float*)goat3d_get_mesh_attribs(mesh, GOAT3D_MESH_ATTR_TEXCOORD))) {

507 glEnableClientState(GL_TEXTURE_COORD_ARRAY);

508 glTexCoordPointer(2, GL_FLOAT, 0, data);

509 }

510

511 int *indices;

512 if((indices = goat3d_get_mesh_faces(mesh))) {

513 glDrawElements(GL_TRIANGLES, num_faces * 3, GL_UNSIGNED_INT, indices);

514 } else {

515 glDrawArrays(GL_TRIANGLES, 0, num_verts * 3);

516 }

517

518 glDisableClientState(GL_VERTEX_ARRAY);

519 glDisableClientState(GL_NORMAL_ARRAY);

520 glDisableClientState(GL_TEXTURE_COORD_ARRAY);

521 }

522

523

524 static float prev_x, prev_y;

525 void GoatViewport::mousePressEvent(QMouseEvent *ev)

526 {

527 prev_x = ev->x();

528 prev_y = ev->y();

529 }

530

531 void GoatViewport::mouseMoveEvent(QMouseEvent *ev)

532 {

533 int dx = ev->x() - prev_x;

534 int dy = ev->y() - prev_y;

535 prev_x = ev->x();

536 prev_y = ev->y();

537

538 if(!dx && !dy) return;

539

540 if(ev->buttons() & Qt::LeftButton) {

541 cam_theta += dx * 0.5;

542 cam_phi += dy * 0.5;

543

544 if(cam_phi < -90) cam_phi = -90;

545 if(cam_phi > 90) cam_phi = 90;

546 }

547 if(ev->buttons() & Qt::RightButton) {

548 cam_dist += dy * 0.1;

549

550 if(cam_dist < 0.0) cam_dist = 0.0;

551 }

552 updateGL();

553 }

554

555 static const char *about_str =

556 "GoatView - Goat3D scene file viewer "

558 " "

559 "This program is free software: you can redistribute it and/or modify "

560 "it under the terms of the GNU General Public License as published by "

561 "the Free Software Foundation, either version 3 of the License, or "

562 "(at your option) any later version. "

563 " "

564 "This program is distributed in the hope that it will be useful, "

565 "but WITHOUT ANY WARRANTY; without even the implied warranty of "

566 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the "

567 "GNU General Public License for more details. "

568 " "

569 "You should have received a copy of the GNU General Public License "

570 "along with this program. If not, see <a href=\"http://www.gnu.org/licenses/gpl\">http://www.gnu.org/licenses/gpl</a>.";

571

572 void GoatView::show_about()

573 {

574 QMessageBox::information(this, "About GoatView", about_str);

575 }

576

577

578 static int next_pow2(int x)

579 {

580 x--;

581 x = (x >> 1) | x;

582 x = (x >> 2) | x;

583 x = (x >> 4) | x;

584 x = (x >> 8) | x;

585 x = (x >> 16) | x;

586 return x + 1;

587 }