goat3d: 07c0ec4a410d goatview/src/goatview.cc

goat3d

view goatview/src/goatview.cc @ 93:07c0ec4a410d

[goatview] line endings fix and missing post_redisplay in load_scene

author	John Tsiombikas <nuclear@member.fsf.org>
date	Sun, 18 May 2014 06:20:20 +0300
parents	ae6c5941faac
children	21319e71117f

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 post_redisplay();

97 return true;

98 }

100 bool GoatView::make_menu()

101 {

102 // file menu

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

104

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

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

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

108 menu_file->addAction(act_open_sce);

109

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

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

112 menu_file->addAction(act_open_anm);

113

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

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

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

117 menu_file->addAction(act_quit);

118

119 // view menu

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

121

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

123 act_use_nodes->setCheckable(true);

124 act_use_nodes->setChecked(use_nodes);

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

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

127 menu_view->addAction(act_use_nodes);

128

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

130 act_use_lighting->setCheckable(true);

131 act_use_lighting->setChecked(use_lighting);

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

133 menu_view->addAction(act_use_lighting);

134

135 // help menu

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

137

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

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

140 menu_help->addAction(act_about);

141 return true;

142 }

143

144 bool GoatView::make_dock()

145 {

146 // ---- side-dock ----

147 QWidget *dock_cont = new QWidget;

148 QVBoxLayout *dock_vbox = new QVBoxLayout;

149 dock_cont->setLayout(dock_vbox);

150

151 QDockWidget *dock = new QDockWidget(this);

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

153 dock->setWidget(dock_cont);

154 addDockWidget(Qt::LeftDockWidgetArea, dock);

155

156 // make the tree view widget

157 treeview = new QTreeView;

158 treeview->setAlternatingRowColors(true);

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

160 dock_vbox->addWidget(treeview);

161

162 scene_model = new SceneModel;

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

164 treeview->setModel(scene_model);

165

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

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

168

169 // misc

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

171 dock_vbox->addWidget(bn_quit);

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

173

174 // ---- bottom dock ----

175 dock_cont = new QWidget;

176 QHBoxLayout *dock_hbox = new QHBoxLayout;

177 dock_cont->setLayout(dock_hbox);

178

179 // animation control box

180 QGridLayout *anim_ctl_box = new QGridLayout;

181 dock_hbox->addLayout(anim_ctl_box);

182

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

184 cbox_anims = new QComboBox;

185 cbox_anims->setDisabled(true);

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

187

188 chk_loop = new QCheckBox("loop");

189 chk_loop->setChecked(false);

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

191

192 QToolBar *toolbar_ctl = new QToolBar;

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

194

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

196 act_rewind->setDisabled(true);

197 toolbar_ctl->addAction(act_rewind);

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

199 act_play->setDisabled(true);

200 toolbar_ctl->addAction(act_play);

201

202 // timeline slider

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

204 slider_time->setDisabled(true);

205 connect(slider_time, &QSlider::valueChanged,

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

207 dock_hbox->addWidget(slider_time);

208

209 dock = new QDockWidget(this);

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

211 dock->setWidget(dock_cont);

212 addDockWidget(Qt::BottomDockWidgetArea, dock);

213

214 return true;

215 }

216

217 bool GoatView::make_center()

218 {

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

220 setCentralWidget(glview);

221 return true;

222 }

223

224 void GoatView::open_scene()

225 {

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

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

228 if(fname.empty()) {

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

230 return;

231 }

232

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

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

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

236 }

237 }

238

239 void GoatView::open_anim()

240 {

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

242 }

243

244

245 // ---- OpenGL viewport ----

246 GoatViewport::GoatViewport(QWidget *main_win)

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

248 {

249 this->main_win = main_win;

250 initialized = false;

251 }

252

253 GoatViewport::~GoatViewport()

254 {

255 }

256

257 QSize GoatViewport::sizeHint() const

258 {

259 return QSize(800, 600);

260 }

261

262 #define CRITICAL(error, detail) \

263 do { \

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

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

266 abort(); \

267 } while(0)

268

269 void GoatViewport::initializeGL()

270 {

271 if(initialized) return;

272 initialized = true;

273

274 init_opengl();

275

276 if(!GLEW_ARB_transpose_matrix) {

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

278 }

279

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

281

282 glEnable(GL_DEPTH_TEST);

283 glEnable(GL_CULL_FACE);

284 if(use_lighting) {

285 glEnable(GL_LIGHTING);

286 }

287 glEnable(GL_LIGHT0);

288

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

290 glLightfv(GL_LIGHT0, GL_POSITION, ldir);

291

292 glEnable(GL_MULTISAMPLE);

293 }

294

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

296 {

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

298 glMatrixMode(GL_PROJECTION);

299 glLoadIdentity();

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

301 }

302

303 void GoatViewport::paintGL()

304 {

305 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

306

307 glMatrixMode(GL_MODELVIEW);

308 glLoadIdentity();

309 glTranslatef(0, 0, -cam_dist);

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

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

312

313 draw_grid();

314

315 if(!scene) return;

316

317 if(use_nodes) {

318 int node_count = goat3d_get_node_count(scene);

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

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

321 if(!goat3d_get_node_parent(node)) {

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

323 }

324 }

325 } else {

326 int mesh_count = goat3d_get_mesh_count(scene);

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

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

329 draw_mesh(mesh);

330 }

331 }

332 }

333

334 void GoatViewport::toggle_lighting()

335 {

336 use_lighting = !use_lighting;

337 if(use_lighting) {

338 glEnable(GL_LIGHTING);

339 } else {

340 glDisable(GL_LIGHTING);

341 }

342 updateGL();

343 }

344

345 #ifndef GLEW_ARB_transpose_matrix

346 #error "GLEW_ARB_transpose_matrix undefined?"

347 #endif

348

349 static void draw_grid()

350 {

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

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

353 float sz0 = sz1 / 2.0;

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

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

356

357 glPushAttrib(GL_ENABLE_BIT | GL_DEPTH_BITS);

358

359 glEnable(GL_BLEND);

360 glDepthFunc(GL_ALWAYS);

361

362 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

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

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

365

366 glPopAttrib();

367 }

368

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

370 {

371 float hsz = sz / 2.0;

372 float offs = sz / (float)nlines;

373

374 glPushAttrib(GL_ENABLE_BIT);

375 glDisable(GL_LIGHTING);

376 glDisable(GL_TEXTURE_2D);

377

378 glLineWidth(2.0);

379 glBegin(GL_LINES);

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

381 glVertex3f(-hsz, 0, 0);

382 glVertex3f(hsz, 0, 0);

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

384 glVertex3f(0, 0, -hsz);

385 glVertex3f(0, 0, hsz);

386 glEnd();

387

388 glLineWidth(1.0);

389 glBegin(GL_LINES);

390 glColor4f(0.5, 0.5, 0.5, alpha);

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

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

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

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

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

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

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

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

399 }

400 }

401 glEnd();

402

403 glPopAttrib();

404 }

405

406 static void draw_node(goat3d_node *node)

407 {

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

409 if(!data) return;

410

411 float xform[16];

412 goat3d_get_node_matrix(node, xform, anim_time);

413

414 glPushMatrix();

415 glMultTransposeMatrixf(xform);

416

417 if(data->visible) {

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

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

420

421 draw_mesh(mesh);

422

423 if(data->selected) {

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

425 goat3d_get_mesh_bounds(mesh, bmin, bmax);

426

427 glPushAttrib(GL_ENABLE_BIT);

428 glDisable(GL_LIGHTING);

429

430 glColor3f(0.3, 1, 0.2);

431

432 glBegin(GL_LINE_LOOP);

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

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

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

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

437 glEnd();

438 glBegin(GL_LINE_LOOP);

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

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

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

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

443 glEnd();

444 glBegin(GL_LINES);

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

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

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

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

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

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

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

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

453 glEnd();

454

455 glPopAttrib();

456 }

457 }

458 }

459

460 int num_child = goat3d_get_node_child_count(node);

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

462 draw_node(goat3d_get_node_child(node, i));

463 }

464

465 glPopMatrix();

466 }

467

468 static void draw_mesh(goat3d_mesh *mesh)

469 {

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

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

472

473 const float *color;

474 goat3d_material *mtl = goat3d_get_mesh_mtl(mesh);

475

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

477 glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, color);

478 glColor3fv(color);

479 } else {

480 glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, white);

481 glColor3fv(white);

482 }

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

484 glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, color);

485 } else {

486 glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, black);

487 }

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

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

490 } else {

491 glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 60.0);

492 }

493 // TODO texture

494

495

496 int num_faces = goat3d_get_mesh_face_count(mesh);

497 int num_verts = goat3d_get_mesh_attrib_count(mesh, GOAT3D_MESH_ATTR_VERTEX);

498

499 glEnableClientState(GL_VERTEX_ARRAY);

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

501

502 float *data;

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

504 glEnableClientState(GL_NORMAL_ARRAY);

505 glNormalPointer(GL_FLOAT, 0, data);

506 }

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

508 glEnableClientState(GL_TEXTURE_COORD_ARRAY);

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

510 }

511

512 int *indices;

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

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

515 } else {

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

517 }

518

519 glDisableClientState(GL_VERTEX_ARRAY);

520 glDisableClientState(GL_NORMAL_ARRAY);

521 glDisableClientState(GL_TEXTURE_COORD_ARRAY);

522 }

523

524

525 static float prev_x, prev_y;

526 void GoatViewport::mousePressEvent(QMouseEvent *ev)

527 {

528 prev_x = ev->x();

529 prev_y = ev->y();

530 }

531

532 void GoatViewport::mouseMoveEvent(QMouseEvent *ev)

533 {

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

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

536 prev_x = ev->x();

537 prev_y = ev->y();

538

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

540

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

542 cam_theta += dx * 0.5;

543 cam_phi += dy * 0.5;

544

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

546 if(cam_phi > 90) cam_phi = 90;

547 }

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

549 cam_dist += dy * 0.1;

550

551 if(cam_dist < 0.0) cam_dist = 0.0;

552 }

553 updateGL();

554 }

555

556 static const char *about_str =

557 "GoatView - Goat3D scene file viewer "

559 " "

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

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

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

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

564 " "

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

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

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

568 "GNU General Public License for more details. "

569 " "

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

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

572

573 void GoatView::show_about()

574 {

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

576 }

577

578

579 static int next_pow2(int x)

580 {

581 x--;

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

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

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

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

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

587 return x + 1;

588 }