src/callbacks.cpp

   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 <unistd.h>
  23
  24 #include <GL/freeglut.h>
  25
  26 #include "callbacks.h"
  27 #include "openglwindow.h"
  28
  29 extern OpenGLWindow *openglWindow;
  30
  31
  32
  33 // GLUT callback functions
  34 // -----------------------
  35
  36 /**
  37  * Key press
  38  * @param key the key
  39  * @param x mouse x-coordinate
  40  * @param y mouse y-coordinate
  41  */
  42 void glutKeyboardCB(unsigned char key, int x, int y)
  43 {
  44     switch (key)
  45     {
  46         // quit
  47         case 27:    // escape key
  48             glutLeaveMainLoop();
  49             break;
  50
  51         // zoom in
  52         case '+':
  53             openglWindow->zoomIn();
  54             break;
  55
  56         // zoom out
  57         case '-':
  58             openglWindow->zoomOut();
  59             break;
  60
  61         // rotate around the y-axis
  62         case 'y':
  63         case 'Y':
  64             openglWindow->rotateY();
  65
  66         default:
  67             break;
  68     }
  69 }
  70
  71
  72
  73 /**
  74  * Special key press
  75  * @param key the key
  76  * @param x mouse x-coordinate
  77  * @param y mouse y-coordinate
  78  */
  79 void glutSpecialCB(int key, int x, int y)
  80 {
  81     switch (key)
  82     {
  83         // move camera left
  84         case GLUT_KEY_LEFT:
  85             openglWindow->left();
  86             break;
  87
  88         // move camera right
  89         case GLUT_KEY_RIGHT:
  90             openglWindow->right();
  91             break;
  92
  93         // move camera up
  94         case GLUT_KEY_UP:
  95             openglWindow->up();
  96             break;
  97
  98         // move camera down
  99         case GLUT_KEY_DOWN:
 100             openglWindow->down();
 101             break;
 102
 103         // move camera forth
 104         case GLUT_KEY_PAGE_UP:
 105             openglWindow->forth();
 106             break;
 107
 108         // move camera back
 109         case GLUT_KEY_PAGE_DOWN:
 110             openglWindow->back();
 111             break;
 112
 113         default:
 114             break;
 115     }
 116 }
 117
 118
 119
 120 /**
 121  * Redraw of screen
 122  */
 123 void glutDisplayCB()
 124 {
 125     openglWindow->draw();
 126 }
 127
 128
 129
 130 /**
 131  * Idling
 132  */
 133 void glutIdleCB()
 134 {
 135     // spare some cpu cycles
 136     usleep(1);
 137 }
 138
 139
 140
 141 // GLUI callback functions
 142 // -----------------------
 143
 144 /**
 145  * Angle changes
 146  * @param id not used
 147  */
 148 void gluiSpinnerAngleCB(int id)
 149 {
 150     // regenerate and draw l-system only if "live mode" is enabled
 151
 152     if (openglWindow->liveActivated())
 153     {
 154         openglWindow->generate();
 155         glutPostRedisplay();
 156     }
 157 }
 158
 159
 160
 161 /**
 162  * Reset button pressed
 163  * @param id not used
 164  */
 165 void gluiButtonResetCB(int id)
 166 {
 167     // place camera at initial position
 168     openglWindow->defaultView();
 169 }
 170
 171
 172
 173 /**
 174  * Generate button pressed
 175  * @param id not used
 176  */
 177 void gluiButtonGenerateCB(int id)
 178 {
 179     openglWindow->generate();
 180 }