| 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 <GL/gl.h> |
| 23 | #include <GL/glu.h> |
| 24 | |
| 25 | #include "fx.h" |
| 26 | #include "fx3d.h" |
| 27 | |
| 28 | #include "renderingsurface.h" |
| 29 | |
| 30 | |
| 31 | |
| 32 | // message map |
| 33 | FXDEFMAP(RenderingSurface) RenderingSurfaceMap[] = |
| 34 | { |
| 35 | FXMAPFUNC(SEL_LEFTBUTTONPRESS, RenderingSurface::ID_CANVAS, RenderingSurface::onLeftMouseDown), |
| 36 | FXMAPFUNC(SEL_LEFTBUTTONRELEASE, RenderingSurface::ID_CANVAS, RenderingSurface::onLeftMouseUp), |
| 37 | FXMAPFUNC(SEL_MIDDLEBUTTONPRESS, RenderingSurface::ID_CANVAS, RenderingSurface::onMiddleMouseDown), |
| 38 | FXMAPFUNC(SEL_MIDDLEBUTTONRELEASE, RenderingSurface::ID_CANVAS, RenderingSurface::onMiddleMouseUp), |
| 39 | FXMAPFUNC(SEL_RIGHTBUTTONPRESS, RenderingSurface::ID_CANVAS, RenderingSurface::onRightMouseDown), |
| 40 | FXMAPFUNC(SEL_RIGHTBUTTONRELEASE, RenderingSurface::ID_CANVAS, RenderingSurface::onRightMouseUp), |
| 41 | FXMAPFUNC(SEL_MOTION, RenderingSurface::ID_CANVAS, RenderingSurface::onMouseMove), |
| 42 | FXMAPFUNC(SEL_PAINT, RenderingSurface::ID_CANVAS, RenderingSurface::onRepaint), |
| 43 | FXMAPFUNC(SEL_CLOSE, 0, RenderingSurface::onQuit) |
| 44 | }; |
| 45 | |
| 46 | // macro to set up class implementation |
| 47 | FXIMPLEMENT(RenderingSurface, FXMainWindow, RenderingSurfaceMap, ARRAYNUMBER(RenderingSurfaceMap)) |
| 48 | |
| 49 | |
| 50 | |
| 51 | /** |
| 52 | * Constructor |
| 53 | * @param application the application object |
| 54 | */ |
| 55 | RenderingSurface::RenderingSurface(FXApp *application) : FXMainWindow(application, "LSystem3D", NULL, NULL, DECOR_ALL, 100, 100, 800, 800) |
| 56 | { |
| 57 | _lsystem = NULL; |
| 58 | |
| 59 | _modelX = 0.0; |
| 60 | _modelY = 0.0; |
| 61 | _modelZ = -10.0; |
| 62 | |
| 63 | _modelRotationY = 0.0; |
| 64 | |
| 65 | _leftMouseDown = _rightMouseDown = _middleMouseDown = false; |
| 66 | |
| 67 | |
| 68 | // pixel format info |
| 69 | _visual = new FXGLVisual(getApp(), VISUAL_DOUBLEBUFFER); |
| 70 | |
| 71 | // OpenGL drawing area |
| 72 | FXVerticalFrame *mainFrame = new FXVerticalFrame(this, LAYOUT_FILL_X | LAYOUT_FILL_Y); |
| 73 | _canvas = new FXGLCanvas(mainFrame, _visual, this, ID_CANVAS, LAYOUT_FILL_X | LAYOUT_FILL_Y); |
| 74 | } |
| 75 | |
| 76 | |
| 77 | |
| 78 | /** |
| 79 | * Destructor |
| 80 | */ |
| 81 | RenderingSurface::~RenderingSurface() |
| 82 | { |
| 83 | delete _visual; |
| 84 | } |
| 85 | |
| 86 | |
| 87 | |
| 88 | /** |
| 89 | * Create and initialize the window |
| 90 | */ |
| 91 | void RenderingSurface::create() |
| 92 | { |
| 93 | // create the window |
| 94 | FXMainWindow::create(); |
| 95 | |
| 96 | // set up OpenGL |
| 97 | _canvas->makeCurrent(); |
| 98 | |
| 99 | initOpenGL(); |
| 100 | |
| 101 | // make the window appear |
| 102 | show(); |
| 103 | } |
| 104 | |
| 105 | |
| 106 | |
| 107 | /** |
| 108 | * Initialize OpenGL |
| 109 | */ |
| 110 | void RenderingSurface::initOpenGL() |
| 111 | { |
| 112 | // projection matrix |
| 113 | glMatrixMode(GL_PROJECTION); |
| 114 | glLoadIdentity(); |
| 115 | gluPerspective(65, 1, 1, 500); |
| 116 | |
| 117 | // modelview matrix |
| 118 | glMatrixMode(GL_MODELVIEW); |
| 119 | glLoadIdentity(); |
| 120 | |
| 121 | |
| 122 | // global ambient light |
| 123 | GLfloat ambientLight[] = {0.7, 0.7, 0.7, 1.0}; |
| 124 | glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambientLight); |
| 125 | |
| 126 | // diffuse light |
| 127 | GLfloat lightPosition[] = {150.0, 150.0, 0.0, 0.0}; |
| 128 | GLfloat whiteLight[] = {1.0, 1.0, 1.0, 1.0}; |
| 129 | glLightfv(GL_LIGHT0, GL_DIFFUSE, whiteLight); |
| 130 | glLightfv(GL_LIGHT0, GL_POSITION, lightPosition); |
| 131 | |
| 132 | |
| 133 | glEnable(GL_COLOR_MATERIAL); |
| 134 | glEnable(GL_LIGHTING); |
| 135 | glEnable(GL_LIGHT0); |
| 136 | glEnable(GL_DEPTH_TEST); |
| 137 | } |
| 138 | |
| 139 | |
| 140 | |
| 141 | /** |
| 142 | * Force an update of the rendering surface |
| 143 | */ |
| 144 | void RenderingSurface::draw() |
| 145 | { |
| 146 | _canvas->update(); |
| 147 | } |
| 148 | |
| 149 | |
| 150 | |
| 151 | /** |
| 152 | * Called by the system when the left mouse button is pressed |
| 153 | * @param sender the sender object |
| 154 | * @param selector message type and id |
| 155 | * @param data event related data |
| 156 | * @return |
| 157 | */ |
| 158 | long RenderingSurface::onLeftMouseDown(FXObject *sender, FXSelector selector, void *data) |
| 159 | { |
| 160 | _leftMouseDown = true; |
| 161 | } |
| 162 | |
| 163 | |
| 164 | |
| 165 | /** |
| 166 | * Called by the system when the left mouse button is released |
| 167 | * @param sender the sender object |
| 168 | * @param selector message type and id |
| 169 | * @param data event related data |
| 170 | * @return |
| 171 | */ |
| 172 | long RenderingSurface::onLeftMouseUp(FXObject *sender, FXSelector selector, void *data) |
| 173 | { |
| 174 | _leftMouseDown = false; |
| 175 | } |
| 176 | |
| 177 | |
| 178 | |
| 179 | /** |
| 180 | * Called by the system when the middle mouse button is pressed |
| 181 | * @param sender the sender object |
| 182 | * @param selector message type and id |
| 183 | * @param data event related data |
| 184 | * @return |
| 185 | */ |
| 186 | long RenderingSurface::onMiddleMouseDown(FXObject *sender, FXSelector selector, void *data) |
| 187 | { |
| 188 | _middleMouseDown = true; |
| 189 | } |
| 190 | |
| 191 | |
| 192 | |
| 193 | /** |
| 194 | * Called by the system when the middle mouse button is released |
| 195 | * @param sender the sender object |
| 196 | * @param selector message type and id |
| 197 | * @param data event related data |
| 198 | * @return |
| 199 | */ |
| 200 | long RenderingSurface::onMiddleMouseUp(FXObject *sender, FXSelector selector, void *data) |
| 201 | { |
| 202 | _middleMouseDown = false; |
| 203 | } |
| 204 | |
| 205 | |
| 206 | |
| 207 | /** |
| 208 | * Called by the system when the right mouse button is pressed |
| 209 | * @param sender the sender object |
| 210 | * @param selector message type and id |
| 211 | * @param data event related data |
| 212 | * @return |
| 213 | */ |
| 214 | long RenderingSurface::onRightMouseDown(FXObject *sender, FXSelector selector, void *data) |
| 215 | { |
| 216 | _rightMouseDown = true; |
| 217 | } |
| 218 | |
| 219 | |
| 220 | |
| 221 | /** |
| 222 | * Called by the system when the right mouse button is released |
| 223 | * @param sender the sender object |
| 224 | * @param selector message type and id |
| 225 | * @param data event related data |
| 226 | * @return |
| 227 | */ |
| 228 | long RenderingSurface::onRightMouseUp(FXObject *sender, FXSelector selector, void *data) |
| 229 | { |
| 230 | _rightMouseDown = false; |
| 231 | } |
| 232 | |
| 233 | |
| 234 | |
| 235 | /** |
| 236 | * Called by the system when the mouse is moved |
| 237 | * @param sender the sender object |
| 238 | * @param selector message type and id |
| 239 | * @param data event related data |
| 240 | * @return |
| 241 | */ |
| 242 | long RenderingSurface::onMouseMove(FXObject *sender, FXSelector selector, void *data) |
| 243 | { |
| 244 | // check status of the mouse buttons and move model |
| 245 | |
| 246 | // left mouse button |
| 247 | if (_leftMouseDown) |
| 248 | { |
| 249 | // move in z-plane |
| 250 | |
| 251 | FXEvent *event = (FXEvent*)data; |
| 252 | |
| 253 | // TODO: "gluPerspective(65, 1, 1, 500)" -> "translateFactor = 610.0 / (-_modelZ)", ugly... |
| 254 | double translateFactor = 610.0 / (-_modelZ); |
| 255 | |
| 256 | _modelX += (event->win_x - event->last_x) / translateFactor; |
| 257 | _modelY += -(event->win_y - event->last_y) / translateFactor; |
| 258 | |
| 259 | _canvas->update(); |
| 260 | } |
| 261 | |
| 262 | // middle mouse button |
| 263 | if (_middleMouseDown) |
| 264 | { |
| 265 | // zoom in/out |
| 266 | |
| 267 | FXEvent *event = (FXEvent*)data; |
| 268 | |
| 269 | _modelZ += -(event->win_y - event->last_y) / 10.0; |
| 270 | |
| 271 | // stop zooming at -1.0 |
| 272 | if (_modelZ >= -1.0) |
| 273 | { |
| 274 | _modelZ = -1.0; |
| 275 | } |
| 276 | |
| 277 | _canvas->update(); |
| 278 | } |
| 279 | |
| 280 | // right mouse button |
| 281 | if (_rightMouseDown) |
| 282 | { |
| 283 | // rotate around y-axis |
| 284 | |
| 285 | FXEvent *event = (FXEvent*)data; |
| 286 | |
| 287 | _modelRotationY = ((int)_modelRotationY + event->win_x - event->last_x) % 360; |
| 288 | |
| 289 | _canvas->update(); |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | |
| 294 | |
| 295 | /** |
| 296 | * Called by the system when the rendering surface needs a repaint |
| 297 | * @param sender the sender object |
| 298 | * @param selector message type and id |
| 299 | * @param data event related data |
| 300 | * @return |
| 301 | */ |
| 302 | long RenderingSurface::onRepaint(FXObject *sender, FXSelector selector, void *data) |
| 303 | { |
| 304 | glMatrixMode (GL_MODELVIEW); |
| 305 | glLoadIdentity(); |
| 306 | |
| 307 | |
| 308 | // clear scene |
| 309 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
| 310 | |
| 311 | // position and orientation of model |
| 312 | glTranslatef(_modelX, _modelY, _modelZ); |
| 313 | glRotatef(_modelRotationY, 0.0, 1.0, 0.0); |
| 314 | |
| 315 | // render model |
| 316 | _lsystem->render(); |
| 317 | |
| 318 | // make it appear |
| 319 | _canvas->swapBuffers(); |
| 320 | } |
| 321 | |
| 322 | |
| 323 | |
| 324 | /** |
| 325 | * Called by the system when the close button is pressed |
| 326 | * @param sender the sender object |
| 327 | * @param selector message type and id |
| 328 | * @param data event related data |
| 329 | * @return |
| 330 | */ |
| 331 | long RenderingSurface::onQuit(FXObject *sender, FXSelector selector, void *data) |
| 332 | { |
| 333 | getApp()->exit(0); |
| 334 | |
| 335 | return 1; |
| 336 | } |
| 337 | |
| 338 | |
| 339 | |
| 340 | /** |
| 341 | * Set current L-system generator |
| 342 | * @param lsystem the L-system generator |
| 343 | */ |
| 344 | void RenderingSurface::setLSystem(LindenmayerSystem *lsystem) |
| 345 | { |
| 346 | _lsystem = lsystem; |
| 347 | } |