| 1 | // Copyright (C) 2006 Erik Dahlberg |
| 2 | // |
| 3 | // This file is part of LSystem3d. |
| 4 | // |
| 5 | // LSystem3D is free software; you can redistribute it and/or |
| 6 | // modify it under the terms of the GNU General Public License |
| 7 | // as published by the Free Software Foundation; either version 2 |
| 8 | // of the License, or (at your option) any later version. |
| 9 | // |
| 10 | // LSystem3D is distributed in the hope that it will be useful, |
| 11 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | // GNU General Public License for more details. |
| 14 | // |
| 15 | // You should have received a copy of the GNU General Public License |
| 16 | // along with LSystem3D; if not, write to the Free Software |
| 17 | // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | |
| 19 | |
| 20 | |
| 21 | |
| 22 | #include <string> |
| 23 | |
| 24 | #include <glui.h> |
| 25 | #include <GL/gl.h> |
| 26 | #include <GL/glu.h> |
| 27 | #include <GL/freeglut.h> |
| 28 | |
| 29 | #include "callbacks.h" |
| 30 | #include "lindenmayersystem.h" |
| 31 | #include "lsystemparameters.h" |
| 32 | #include "model.h" |
| 33 | #include "openglwindow.h" |
| 34 | |
| 35 | using namespace std; |
| 36 | |
| 37 | extern OpenGLWindow *openglWindow; |
| 38 | |
| 39 | |
| 40 | |
| 41 | /** |
| 42 | * Constructor |
| 43 | */ |
| 44 | OpenGLWindow::OpenGLWindow() |
| 45 | { |
| 46 | // misc init |
| 47 | |
| 48 | openglWindow = this; |
| 49 | _busyGenerating = true; |
| 50 | lsystemParametersPath = "lsystem.xml"; |
| 51 | defaultView(); |
| 52 | |
| 53 | |
| 54 | |
| 55 | // init GLUT & GLUI |
| 56 | // ---------------- |
| 57 | |
| 58 | // drawing window |
| 59 | glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH); |
| 60 | glutInitWindowSize(800, 800); |
| 61 | int _window = glutCreateWindow("lsystem"); |
| 62 | |
| 63 | // return control after closing the window |
| 64 | glutSetOption(GLUT_ACTION_ON_WINDOW_CLOSE, 1); |
| 65 | |
| 66 | // register callbacks |
| 67 | glutKeyboardFunc(glutKeyboardCB); |
| 68 | glutSpecialFunc(glutSpecialCB); |
| 69 | glutDisplayFunc(glutDisplayCB); |
| 70 | GLUI_Master.set_glutIdleFunc(glutIdleCB); |
| 71 | |
| 72 | // GUI window |
| 73 | _glui = GLUI_Master.create_glui("lsystem"); |
| 74 | |
| 75 | // model and l-system creation |
| 76 | _model = new Model; |
| 77 | _lsystem = new LindenmayerSystem(_model); |
| 78 | |
| 79 | // load lsystem parameters |
| 80 | _lsystemParameters.load(_lsystem, lsystemParametersPath.c_str()); |
| 81 | |
| 82 | |
| 83 | |
| 84 | // create GLUI widgets |
| 85 | // ------------------- |
| 86 | |
| 87 | // axiom |
| 88 | _axiomEditText = _glui->add_edittext("Axiom", GLUI_EDITTEXT_TEXT); |
| 89 | _axiomEditText->set_text((char *)_lsystem->getAxiom().c_str()); |
| 90 | |
| 91 | // rules |
| 92 | // TODO: make dynamic! |
| 93 | GLUI_Panel *panel = _glui->add_panel("Rules", GLUI_PANEL_EMBOSSED); |
| 94 | _ruleEditTexts.push_back(_glui->add_edittext_to_panel(panel, "#1", GLUI_EDITTEXT_TEXT)); |
| 95 | _ruleEditTexts.push_back(_glui->add_edittext_to_panel(panel, "#2", GLUI_EDITTEXT_TEXT)); |
| 96 | _ruleEditTexts.push_back(_glui->add_edittext_to_panel(panel, "#3", GLUI_EDITTEXT_TEXT)); |
| 97 | _ruleEditTexts.push_back(_glui->add_edittext_to_panel(panel, "#4", GLUI_EDITTEXT_TEXT)); |
| 98 | _ruleEditTexts.push_back(_glui->add_edittext_to_panel(panel, "#5", GLUI_EDITTEXT_TEXT)); |
| 99 | _ruleEditTexts[0]->set_w(200); |
| 100 | _ruleEditTexts[1]->set_w(200); |
| 101 | _ruleEditTexts[2]->set_w(200); |
| 102 | _ruleEditTexts[3]->set_w(200); |
| 103 | _ruleEditTexts[4]->set_w(200); |
| 104 | |
| 105 | // sync gui and l-system |
| 106 | map<string,string> rules = _lsystem->getRules(); |
| 107 | map<string,string>::iterator currentRule; |
| 108 | int i = 0; |
| 109 | for (currentRule = rules.begin(); currentRule != rules.end(); currentRule++) |
| 110 | { |
| 111 | string rule = currentRule->first + "=" + currentRule->second; |
| 112 | // TODO: bounds? |
| 113 | _ruleEditTexts[i++]->set_text((char *)rule.c_str()); |
| 114 | } |
| 115 | |
| 116 | // angle |
| 117 | _angleSpinner = _glui->add_spinner("Angle", GLUI_SPINNER_FLOAT, NULL, -1, (GLUI_Update_CB)gluiSpinnerAngleCB); |
| 118 | _angleSpinner->set_float_val(_lsystem->getAngle()); |
| 119 | _angleSpinner->set_speed(1.0); |
| 120 | |
| 121 | // iterations |
| 122 | _iterationsSpinner = _glui->add_spinner("Iterations", GLUI_SPINNER_INT); |
| 123 | _iterationsSpinner->set_int_val(_lsystem->getNumIterations()); |
| 124 | |
| 125 | |
| 126 | _glui->add_separator(); |
| 127 | |
| 128 | |
| 129 | // live update |
| 130 | _liveUpdates = 1; |
| 131 | _liveCheckbox = _glui->add_checkbox("Live update", &_liveUpdates); |
| 132 | |
| 133 | // reset |
| 134 | _glui->add_button("Reset view", -1, (GLUI_Update_CB)gluiButtonResetCB); |
| 135 | |
| 136 | // generate |
| 137 | _glui->add_button("Generate", -1, (GLUI_Update_CB)gluiButtonGenerateCB); |
| 138 | |
| 139 | |
| 140 | _glui->set_main_gfx_window(_window); |
| 141 | |
| 142 | |
| 143 | |
| 144 | |
| 145 | // init OpenGL view |
| 146 | // ---------------- |
| 147 | |
| 148 | // projection |
| 149 | glMatrixMode(GL_PROJECTION); |
| 150 | glLoadIdentity(); |
| 151 | gluPerspective(65, 1, 1, 100); |
| 152 | |
| 153 | // model view |
| 154 | glMatrixMode(GL_MODELVIEW); |
| 155 | glLoadIdentity(); |
| 156 | gluLookAt(0.0, 0.0, 2.0, |
| 157 | 0.0, 0.0, 0.0, |
| 158 | 0.0, 1.0, 0.0); |
| 159 | |
| 160 | glClearColor(0.0, 0.0, 0.0, 0.0); |
| 161 | |
| 162 | glShadeModel(GL_SMOOTH); |
| 163 | |
| 164 | // light |
| 165 | GLfloat lightPosition[] = {0.0, 0.0, 2.0, 0.0}; |
| 166 | GLfloat white[] = {1.0, 1.0, 1.0, 1.0}; |
| 167 | glLightfv(GL_LIGHT0, GL_DIFFUSE, white); |
| 168 | glLightfv(GL_LIGHT0, GL_POSITION, lightPosition); |
| 169 | |
| 170 | glEnable(GL_COLOR_MATERIAL); |
| 171 | glEnable(GL_LIGHTING); |
| 172 | glEnable(GL_LIGHT0); |
| 173 | glEnable(GL_DEPTH_TEST); |
| 174 | |
| 175 | glutMainLoop(); |
| 176 | } |
| 177 | |
| 178 | |
| 179 | |
| 180 | /** |
| 181 | * Destructor |
| 182 | */ |
| 183 | OpenGLWindow::~OpenGLWindow() |
| 184 | { |
| 185 | // save current l-system to disk |
| 186 | _lsystemParameters.save(_lsystem, lsystemParametersPath.c_str()); |
| 187 | |
| 188 | delete _lsystem; |
| 189 | delete _model; |
| 190 | } |
| 191 | |
| 192 | |
| 193 | |
| 194 | /** |
| 195 | * Start generation of l-system data |
| 196 | */ |
| 197 | void OpenGLWindow::generate() |
| 198 | { |
| 199 | _busyGenerating = true; |
| 200 | |
| 201 | // read GLUI widgets and set corresponding l-system parameters |
| 202 | |
| 203 | // axiom |
| 204 | char *axiom = _axiomEditText->get_text(); |
| 205 | _lsystem->setAxiom(axiom); |
| 206 | |
| 207 | // rules |
| 208 | vector<char *> rules; |
| 209 | rules.push_back(_ruleEditTexts[0]->get_text()); |
| 210 | rules.push_back(_ruleEditTexts[1]->get_text()); |
| 211 | rules.push_back(_ruleEditTexts[2]->get_text()); |
| 212 | rules.push_back(_ruleEditTexts[3]->get_text()); |
| 213 | rules.push_back(_ruleEditTexts[4]->get_text()); |
| 214 | |
| 215 | for (int i = 0; i < rules.size(); i++) |
| 216 | { |
| 217 | if (rules[i][0] != '\0') |
| 218 | { |
| 219 | // non-empty rule |
| 220 | |
| 221 | // separate rule name from the actual rule |
| 222 | string ruleName(rules[i], 1); |
| 223 | string theRule(rules[i]+2); |
| 224 | |
| 225 | _lsystem->setRule(ruleName, theRule); |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | // angle |
| 230 | float angle = _angleSpinner->get_float_val(); |
| 231 | _lsystem->setAngle(angle); |
| 232 | |
| 233 | // iterations |
| 234 | int iterations = _iterationsSpinner->get_int_val(); |
| 235 | _lsystem->setNumIterations(iterations); |
| 236 | |
| 237 | |
| 238 | // start generation |
| 239 | _model->begin(); |
| 240 | _lsystem->generate(); |
| 241 | _model->end(); |
| 242 | |
| 243 | _busyGenerating = false; |
| 244 | } |
| 245 | |
| 246 | |
| 247 | |
| 248 | /** |
| 249 | * Move camera left |
| 250 | */ |
| 251 | void OpenGLWindow::left() |
| 252 | { |
| 253 | _xModel += 0.1; |
| 254 | glutPostRedisplay(); |
| 255 | } |
| 256 | |
| 257 | |
| 258 | |
| 259 | /** |
| 260 | * Move camera right |
| 261 | */ |
| 262 | void OpenGLWindow::right() |
| 263 | { |
| 264 | _xModel -= 0.1; |
| 265 | glutPostRedisplay(); |
| 266 | } |
| 267 | |
| 268 | |
| 269 | |
| 270 | /** |
| 271 | * Move camera up |
| 272 | */ |
| 273 | void OpenGLWindow::up() |
| 274 | { |
| 275 | _yModel -= 0.1; |
| 276 | glutPostRedisplay(); |
| 277 | } |
| 278 | |
| 279 | |
| 280 | |
| 281 | /** |
| 282 | * Move camera down |
| 283 | */ |
| 284 | void OpenGLWindow::down() |
| 285 | { |
| 286 | _yModel += 0.1; |
| 287 | glutPostRedisplay(); |
| 288 | } |
| 289 | |
| 290 | |
| 291 | |
| 292 | /** |
| 293 | * Move camera forth |
| 294 | */ |
| 295 | void OpenGLWindow::forth() |
| 296 | { |
| 297 | _zModel += 1; |
| 298 | glutPostRedisplay(); |
| 299 | } |
| 300 | |
| 301 | |
| 302 | |
| 303 | /** |
| 304 | * Move camera back |
| 305 | */ |
| 306 | void OpenGLWindow::back() |
| 307 | { |
| 308 | _zModel -= 1; |
| 309 | glutPostRedisplay(); |
| 310 | } |
| 311 | |
| 312 | |
| 313 | |
| 314 | /** |
| 315 | * Zoom in |
| 316 | */ |
| 317 | void OpenGLWindow::zoomIn() |
| 318 | { |
| 319 | _scaleModel *= 1.1; |
| 320 | glutPostRedisplay(); |
| 321 | } |
| 322 | |
| 323 | |
| 324 | |
| 325 | /** |
| 326 | * Zoom out |
| 327 | */ |
| 328 | void OpenGLWindow::zoomOut() |
| 329 | { |
| 330 | _scaleModel /= 1.1; |
| 331 | glutPostRedisplay(); |
| 332 | } |
| 333 | |
| 334 | |
| 335 | |
| 336 | /** |
| 337 | * Rotate around y-axis |
| 338 | */ |
| 339 | void OpenGLWindow::rotateY() |
| 340 | { |
| 341 | _yRotationModel = int(_yRotationModel + 5.0) % 360; |
| 342 | glutPostRedisplay(); |
| 343 | } |
| 344 | |
| 345 | |
| 346 | |
| 347 | /** |
| 348 | * Draw l-system model to screen |
| 349 | */ |
| 350 | void OpenGLWindow::draw() |
| 351 | { |
| 352 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
| 353 | |
| 354 | if (!_busyGenerating) |
| 355 | { |
| 356 | // ready for rendering |
| 357 | |
| 358 | glPushMatrix(); |
| 359 | glTranslatef(_xModel, _yModel, _zModel); |
| 360 | glScalef(_scaleModel, _scaleModel, _scaleModel); |
| 361 | glRotatef(_yRotationModel, 0.0, 1.0, 0.0); |
| 362 | |
| 363 | _model->draw(); |
| 364 | glPopMatrix(); |
| 365 | } |
| 366 | |
| 367 | glutSwapBuffers(); |
| 368 | } |
| 369 | |
| 370 | |
| 371 | |
| 372 | /** |
| 373 | * Reset to default view |
| 374 | */ |
| 375 | void OpenGLWindow::defaultView() |
| 376 | { |
| 377 | _xModel = _yModel = _zModel = 0.0; |
| 378 | _scaleModel = 1.0; |
| 379 | _yRotationModel = 0.0; |
| 380 | } |
| 381 | |
| 382 | |
| 383 | |
| 384 | /** |
| 385 | * Check if live mode is activated |
| 386 | * @return true, if activated |
| 387 | */ |
| 388 | bool OpenGLWindow::liveActivated() |
| 389 | { |
| 390 | return _liveUpdates; |
| 391 | } |