| 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 | } |