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15c82487 | 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 | } |