[852] | 1 | /*
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| 2 | glh - is a platform-indepenedent C++ OpenGL helper library
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| 3 |
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| 4 |
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| 5 | Copyright (c) 2000 Cass Everitt
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| 6 | Copyright (c) 2000 NVIDIA Corporation
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| 7 | All rights reserved.
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| 8 |
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| 9 | Redistribution and use in source and binary forms, with or
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| 10 | without modification, are permitted provided that the following
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| 11 | conditions are met:
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| 12 |
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| 13 | * Redistributions of source code must retain the above
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| 14 | copyright notice, this list of conditions and the following
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| 15 | disclaimer.
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| 16 |
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| 17 | * Redistributions in binary form must reproduce the above
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| 18 | copyright notice, this list of conditions and the following
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| 19 | disclaimer in the documentation and/or other materials
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| 20 | provided with the distribution.
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| 21 |
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| 22 | * The names of contributors to this software may not be used
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| 23 | to endorse or promote products derived from this software
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| 24 | without specific prior written permission.
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| 25 |
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| 26 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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| 27 | ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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| 28 | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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| 29 | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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| 30 | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 31 | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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| 32 | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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| 33 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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| 34 | CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 35 | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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| 36 | ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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| 37 | POSSIBILITY OF SUCH DAMAGE.
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| 38 |
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| 39 |
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| 40 | Cass Everitt - cass@r3.nu
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| 41 | */
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| 42 |
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| 43 | #ifndef GLH_GLUT_H
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| 44 | #define GLH_GLUT_H
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| 45 |
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| 46 | // some helper functions and object to
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| 47 | // make writing simple glut programs even easier! :-)
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| 48 |
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| 49 | #ifdef MACOS
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| 50 | #include <GLUT/glut.h>
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| 51 | #else
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| 52 | #include <GL/glut.h>
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| 53 | #endif
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| 54 |
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| 55 | #include <glh/glh_convenience.h>
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| 56 | #include <algorithm>
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| 57 | #include <list>
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| 58 |
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| 59 | namespace glh
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| 60 | {
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| 61 |
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| 62 | class glut_interactor
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| 63 | {
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| 64 | public:
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| 65 | glut_interactor() { enabled = true; }
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| 66 |
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| 67 | virtual void display() {}
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| 68 | virtual void idle() {}
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| 69 | virtual void keyboard(unsigned char key, int x, int y) {}
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| 70 | virtual void menu_status(int status, int x, int y) {}
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| 71 | virtual void motion(int x, int y) {}
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| 72 | virtual void mouse(int button, int state, int x, int y) {}
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| 73 | virtual void passive_motion(int x, int y) {}
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| 74 | virtual void reshape(int w, int h) {}
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| 75 | virtual void special(int key, int x, int y) {}
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| 76 | virtual void timer(int value) {}
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| 77 | virtual void visibility(int v) {}
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| 78 |
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| 79 | virtual void enable() { enabled = true; }
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| 80 | virtual void disable() { enabled = false; }
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| 81 |
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| 82 | bool enabled;
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| 83 | };
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| 84 |
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| 85 | std::list<glut_interactor *> interactors;
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| 86 | bool propagate;
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| 87 |
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| 88 | void glut_display_function()
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| 89 | {
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| 90 | propagate = true;
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| 91 | for(std::list<glut_interactor *>::iterator it=interactors.begin(); it != interactors.end() && propagate; it++)
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| 92 | (*it)->display();
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| 93 | }
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| 94 |
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| 95 | void glut_idle_function()
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| 96 | {
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| 97 | propagate = true;
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| 98 | for(std::list<glut_interactor *>::iterator it=interactors.begin(); it != interactors.end() && propagate; it++)
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| 99 | (*it)->idle();
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| 100 | }
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| 101 |
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| 102 | void glut_keyboard_function(unsigned char k, int x, int y)
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| 103 | {
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| 104 | propagate = true;
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| 105 | for(std::list<glut_interactor *>::iterator it=interactors.begin(); it != interactors.end() && propagate; it++)
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| 106 | (*it)->keyboard(k, x, y);
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| 107 | }
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| 108 |
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| 109 | void glut_menu_status_function(int status, int x, int y)
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| 110 | {
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| 111 | propagate = true;
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| 112 | for(std::list<glut_interactor *>::iterator it=interactors.begin(); it != interactors.end() && propagate; it++)
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| 113 | (*it)->menu_status(status, x, y);
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| 114 | }
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| 115 |
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| 116 | void glut_motion_function(int x, int y)
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| 117 | {
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| 118 | propagate = true;
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| 119 | for(std::list<glut_interactor *>::iterator it=interactors.begin(); it != interactors.end() && propagate; it++)
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| 120 | (*it)->motion(x, y);
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| 121 | }
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| 122 |
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| 123 | void glut_mouse_function(int button, int state, int x, int y)
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| 124 | {
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| 125 | propagate = true;
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| 126 | for(std::list<glut_interactor *>::iterator it=interactors.begin(); it != interactors.end() && propagate; it++)
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| 127 | (*it)->mouse(button, state, x, y);
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| 128 | }
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| 129 |
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| 130 | void glut_passive_motion_function(int x, int y)
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| 131 | {
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| 132 | propagate = true;
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| 133 | for(std::list<glut_interactor *>::iterator it=interactors.begin(); it != interactors.end() && propagate; it++)
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| 134 | (*it)->passive_motion(x, y);
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| 135 | }
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| 136 |
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| 137 | void glut_reshape_function(int w, int h)
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| 138 | {
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| 139 | propagate = true;
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| 140 | for(std::list<glut_interactor *>::iterator it=interactors.begin(); it != interactors.end() && propagate; it++)
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| 141 | (*it)->reshape(w,h);
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| 142 | }
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| 143 |
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| 144 | void glut_special_function(int k, int x, int y)
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| 145 | {
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| 146 | propagate = true;
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| 147 | for(std::list<glut_interactor *>::iterator it=interactors.begin(); it != interactors.end() && propagate; it++)
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| 148 | (*it)->special(k, x, y);
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| 149 | }
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| 150 |
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| 151 | void glut_timer_function(int v)
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| 152 | {
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| 153 | propagate = true;
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| 154 | for(std::list<glut_interactor *>::iterator it=interactors.begin(); it != interactors.end() && propagate; it++)
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| 155 | (*it)->timer(v);
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| 156 | }
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| 157 |
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| 158 | void glut_visibility_function(int v)
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| 159 | {
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| 160 | propagate = true;
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| 161 | for(std::list<glut_interactor *>::iterator it=interactors.begin(); it != interactors.end() && propagate; it++)
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| 162 | (*it)->visibility(v);
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| 163 | }
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| 164 |
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| 165 | // stop processing the current event
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| 166 | inline void glut_event_processed()
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| 167 | {
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| 168 | propagate = false;
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| 169 | }
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| 170 |
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| 171 | inline void glut_helpers_initialize()
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| 172 | {
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| 173 | glutDisplayFunc(glut_display_function);
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| 174 | glutIdleFunc(0);
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| 175 | glutKeyboardFunc(glut_keyboard_function);
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| 176 | glutMenuStatusFunc(glut_menu_status_function);
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| 177 | glutMotionFunc(glut_motion_function);
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| 178 | glutMouseFunc(glut_mouse_function);
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| 179 | glutPassiveMotionFunc(glut_passive_motion_function);
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| 180 | glutReshapeFunc(glut_reshape_function);
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| 181 | glutSpecialFunc(glut_special_function);
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| 182 | glutVisibilityFunc(glut_visibility_function);
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| 183 | }
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| 184 |
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| 185 | inline void glut_remove_interactor(glut_interactor *gi)
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| 186 | {
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| 187 | std::list<glut_interactor *>::iterator it =
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| 188 | std::find(interactors.begin(), interactors.end(), gi);
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| 189 | if(it != interactors.end())
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| 190 | interactors.erase(it);
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| 191 | }
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| 192 |
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| 193 | inline void glut_add_interactor(glut_interactor *gi, bool append=true)
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| 194 | {
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| 195 | glut_remove_interactor(gi);
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| 196 | if(append)
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| 197 | interactors.push_back(gi);
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| 198 | else
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| 199 | interactors.push_front(gi);
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| 200 | }
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| 201 |
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| 202 | inline void glut_timer(int msec, int value)
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| 203 | {
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| 204 | glutTimerFunc(msec, glut_timer_function, value);
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| 205 | }
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| 206 |
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| 207 | inline void glut_idle(bool do_idle)
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| 208 | {
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| 209 | glutIdleFunc(do_idle ? glut_idle_function : 0);
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| 210 | }
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| 211 |
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| 212 | class glut_callbacks : public glut_interactor
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| 213 | {
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| 214 | public:
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| 215 | glut_callbacks() :
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| 216 | display_function(0),
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| 217 | idle_function(0),
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| 218 | keyboard_function(0),
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| 219 | menu_status_function(0),
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| 220 | motion_function(0),
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| 221 | mouse_function(0),
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| 222 | passive_motion_function(0),
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| 223 | reshape_function(0),
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| 224 | special_function(0),
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| 225 | timer_function(0),
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| 226 | visibility_function()
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| 227 | {}
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| 228 |
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| 229 | virtual void display()
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| 230 | { if(display_function) display_function(); }
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| 231 |
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| 232 | virtual void idle()
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| 233 | { if(idle_function) idle_function(); }
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| 234 |
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| 235 | virtual void keyboard(unsigned char k, int x, int y)
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| 236 | { if(keyboard_function) keyboard_function(k, x, y); }
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| 237 |
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| 238 | virtual void menu_status(int status, int x, int y)
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| 239 | { if(menu_status_function) menu_status_function(status, x, y); }
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| 240 |
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| 241 | virtual void motion(int x, int y)
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| 242 | { if(motion_function) motion_function(x,y); }
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| 243 |
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| 244 | virtual void mouse(int button, int state, int x, int y)
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| 245 | { if(mouse_function) mouse_function(button, state, x, y); }
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| 246 |
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| 247 | virtual void passive_motion(int x, int y)
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| 248 | { if(passive_motion_function) passive_motion_function(x, y); }
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| 249 |
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| 250 | virtual void reshape(int w, int h)
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| 251 | { if(reshape_function) reshape_function(w, h); }
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| 252 |
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| 253 | virtual void special(int key, int x, int y)
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| 254 | { if(special_function) special_function(key, x, y); }
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| 255 |
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| 256 | virtual void timer(int value)
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| 257 | { if(timer_function) timer_function(value); }
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| 258 |
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| 259 | virtual void visibility(int v)
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| 260 | { if(visibility_function) visibility_function(v); }
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| 261 |
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| 262 | void (* display_function) ();
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| 263 | void (* idle_function) ();
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| 264 | void (* keyboard_function) (unsigned char, int, int);
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| 265 | void (* menu_status_function) (int, int, int);
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| 266 | void (* motion_function) (int, int);
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| 267 | void (* mouse_function) (int, int, int, int);
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| 268 | void (* passive_motion_function) (int, int);
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| 269 | void (* reshape_function) (int, int);
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| 270 | void (* special_function) (int, int, int);
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| 271 | void (* timer_function) (int);
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| 272 | void (* visibility_function) (int);
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| 273 |
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| 274 | };
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| 275 |
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| 276 |
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| 277 |
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| 278 | class glut_perspective_reshaper : public glut_interactor
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| 279 | {
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| 280 | public:
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| 281 | glut_perspective_reshaper(float infovy = 60.f, float inzNear = .1f, float inzFar = 10.f)
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| 282 | : fovy(infovy), zNear(inzNear), zFar(inzFar), aspect_factor(1) {}
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| 283 |
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| 284 | void reshape(int w, int h)
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| 285 | {
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| 286 | width = w; height = h;
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| 287 |
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| 288 | if(enabled) apply();
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| 289 | }
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| 290 |
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| 291 | void apply()
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| 292 | {
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| 293 | glViewport(0,0,width,height);
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| 294 | glMatrixMode(GL_PROJECTION);
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| 295 | glLoadIdentity();
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| 296 | apply_perspective();
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| 297 | glMatrixMode(GL_MODELVIEW);
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| 298 | }
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| 299 | void apply_perspective()
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| 300 | {
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| 301 | aspect = aspect_factor * float(width)/float(height);
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| 302 | if ( aspect < 1 )
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| 303 | {
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| 304 | // fovy is a misnomer.. we really mean the fov applies to the
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| 305 | // smaller dimension
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| 306 | float fovx = fovy;
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| 307 | float real_fov = to_degrees(2 * atan(tan(to_radians(fovx/2))/aspect));
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| 308 | gluPerspective(real_fov, aspect, zNear, zFar);
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| 309 | }
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| 310 | else
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| 311 | gluPerspective(fovy, aspect, zNear, zFar);
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| 312 | }
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| 313 | int width, height;
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| 314 | float fovy, aspect, zNear, zFar;
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| 315 | float aspect_factor;
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| 316 | };
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| 317 |
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| 318 | // activates/deactivates on a particular mouse button
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| 319 | // and calculates deltas while active
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| 320 | class glut_simple_interactor : public glut_interactor
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| 321 | {
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| 322 | public:
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| 323 | glut_simple_interactor()
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| 324 | {
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| 325 | activate_on = GLUT_LEFT_BUTTON;
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| 326 | active = false;
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| 327 | use_modifiers = true;
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| 328 | modifiers = 0;
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| 329 | width = height = 0;
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| 330 | x0 = y0 = x = y = dx = dy = 0;
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| 331 | }
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| 332 |
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| 333 | virtual void mouse(int button, int state, int X, int Y)
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| 334 | {
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| 335 | if(enabled && button == activate_on && state == GLUT_DOWN &&
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| 336 | (! use_modifiers || (modifiers == glutGetModifiers())) )
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| 337 | {
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| 338 | active = true;
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| 339 | x = x0 = X;
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| 340 | y = y0 = Y;
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| 341 | dx = dy = 0;
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| 342 | }
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| 343 | else if (enabled && button == activate_on && state == GLUT_UP)
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| 344 | {
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| 345 | if(dx == 0 && dy == 0)
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| 346 | update();
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| 347 | active = false;
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| 348 | dx = dy = 0;
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| 349 | }
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| 350 | }
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| 351 |
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| 352 | virtual void motion(int X, int Y)
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| 353 | {
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| 354 | if(enabled && active)
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| 355 | {
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| 356 | dx = X - x; dy = y - Y;
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| 357 | x = X; y = Y;
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| 358 | update();
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| 359 | }
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| 360 | }
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| 361 |
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| 362 | void reshape(int w, int h)
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| 363 | {
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| 364 | width = w; height = h;
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| 365 | }
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| 366 |
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| 367 | virtual void apply_transform() = 0;
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| 368 | virtual void apply_inverse_transform() = 0;
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| 369 | virtual matrix4f get_transform() = 0;
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| 370 | virtual matrix4f get_inverse_transform() = 0;
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| 371 |
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| 372 | virtual void update() {}
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| 373 |
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| 374 | int activate_on;
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| 375 | bool use_modifiers;
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| 376 | int modifiers;
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| 377 | bool active;
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| 378 | int x0, y0;
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| 379 | int x, y;
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| 380 | int dx, dy;
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| 381 | int width, height;
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| 382 | };
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| 383 |
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| 384 |
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| 385 | class glut_pan : public glut_simple_interactor
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| 386 | {
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| 387 | public:
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| 388 | glut_pan()
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| 389 | {
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| 390 | scale = .01f;
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| 391 | invert_increment = false;
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| 392 | parent_rotation = 0;
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| 393 | }
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| 394 | void update()
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| 395 | {
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| 396 | vec3f v(dx, dy, 0);
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| 397 | if(parent_rotation != 0) parent_rotation->mult_vec(v);
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| 398 |
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| 399 | if(invert_increment)
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| 400 | pan -= v * scale;
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| 401 | else
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| 402 | pan += v * scale;
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| 403 | glutPostRedisplay();
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| 404 | }
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| 405 |
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| 406 | void apply_transform()
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| 407 | {
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| 408 | //cerr << "Applying transform: " << (x - x0) << ", " << (y - y0) << endl;
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| 409 | glTranslatef(pan[0], pan[1], pan[2]);
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| 410 | }
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| 411 |
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| 412 | void apply_inverse_transform()
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| 413 | {
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| 414 | //cerr << "Applying transform: " << (x - x0) << ", " << (y - y0) << endl;
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| 415 | glTranslatef(-pan[0], -pan[1], -pan[2]);
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| 416 | }
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| 417 |
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| 418 | matrix4f get_transform()
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| 419 | {
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| 420 | matrix4f m;
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| 421 | m.make_identity();
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| 422 | m.set_translate(pan);
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| 423 | return m;
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| 424 | }
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| 425 |
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| 426 | matrix4f get_inverse_transform()
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| 427 | {
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| 428 | matrix4f m;
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| 429 | m.make_identity();
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| 430 | m.set_translate(-pan);
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| 431 | return m;
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| 432 | }
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| 433 |
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| 434 |
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| 435 | bool invert_increment;
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| 436 | const rotationf * parent_rotation;
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| 437 | vec3f pan;
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| 438 | float scale;
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| 439 | };
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| 440 |
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| 441 |
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| 442 | class glut_dolly : public glut_simple_interactor
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| 443 | {
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| 444 | public:
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| 445 | glut_dolly()
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| 446 | {
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| 447 | scale = .01f;
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| 448 | invert_increment = false;
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| 449 | parent_rotation = 0;
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| 450 | }
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| 451 | void update()
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| 452 | {
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| 453 | vec3f v(0,0,dy);
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| 454 | if(parent_rotation != 0) parent_rotation->mult_vec(v);
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| 455 |
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| 456 | if(invert_increment)
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| 457 | dolly += v * scale;
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| 458 | else
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| 459 | dolly -= v * scale;
|
---|
| 460 | glutPostRedisplay();
|
---|
| 461 | }
|
---|
| 462 |
|
---|
| 463 | void apply_transform()
|
---|
| 464 | {
|
---|
| 465 | //cerr << "Applying transform: " << (x - x0) << ", " << (y - y0) << endl;
|
---|
| 466 | glTranslatef(dolly[0], dolly[1], dolly[2]);
|
---|
| 467 | }
|
---|
| 468 |
|
---|
| 469 | void apply_inverse_transform()
|
---|
| 470 | {
|
---|
| 471 | //cerr << "Applying transform: " << (x - x0) << ", " << (y - y0) << endl;
|
---|
| 472 | glTranslatef(-dolly[0], -dolly[1], -dolly[2]);
|
---|
| 473 | }
|
---|
| 474 |
|
---|
| 475 | matrix4f get_transform()
|
---|
| 476 | {
|
---|
| 477 | matrix4f m;
|
---|
| 478 | m.make_identity();
|
---|
| 479 | m.set_translate(dolly);
|
---|
| 480 | return m;
|
---|
| 481 | }
|
---|
| 482 |
|
---|
| 483 | matrix4f get_inverse_transform()
|
---|
| 484 | {
|
---|
| 485 | matrix4f m;
|
---|
| 486 | m.make_identity();
|
---|
| 487 | m.set_translate(-dolly);
|
---|
| 488 | return m;
|
---|
| 489 | }
|
---|
| 490 |
|
---|
| 491 |
|
---|
| 492 | bool invert_increment;
|
---|
| 493 | const rotationf * parent_rotation;
|
---|
| 494 | vec3f dolly;
|
---|
| 495 | float scale;
|
---|
| 496 | };
|
---|
| 497 |
|
---|
| 498 |
|
---|
| 499 | class glut_trackball : public glut_simple_interactor
|
---|
| 500 | {
|
---|
| 501 | public:
|
---|
| 502 | glut_trackball()
|
---|
| 503 | {
|
---|
| 504 | r = rotationf(vec3f(0, 1, 0), 0);
|
---|
| 505 | centroid = vec3f(0,0,0);
|
---|
| 506 | scale = 1;
|
---|
| 507 | invert_increment = false;
|
---|
| 508 | parent_rotation = 0;
|
---|
| 509 | legacy_mode = false;
|
---|
| 510 | }
|
---|
| 511 |
|
---|
| 512 | void update()
|
---|
| 513 | {
|
---|
| 514 | if(dx == 0 && dy == 0)
|
---|
| 515 | {
|
---|
| 516 | incr = rotationf();
|
---|
| 517 | return;
|
---|
| 518 | }
|
---|
| 519 |
|
---|
| 520 | if(legacy_mode)
|
---|
| 521 | {
|
---|
| 522 | vec3f v(dy, -dx, 0);
|
---|
| 523 | float len = v.normalize();
|
---|
| 524 | if(parent_rotation != 0) parent_rotation->mult_vec(v);
|
---|
| 525 | //r.mult_dir(vec3f(v), v);
|
---|
| 526 | if(invert_increment)
|
---|
| 527 | incr.set_value(v, -len * scale * -.01);
|
---|
| 528 | else
|
---|
| 529 | incr.set_value(v, len * scale * -.01);
|
---|
| 530 | }
|
---|
| 531 | else
|
---|
| 532 | {
|
---|
| 533 | float min = width < height ? width : height;
|
---|
| 534 | min /= 2.f;
|
---|
| 535 | vec3f offset(width/2.f, height/2.f, 0);
|
---|
| 536 | vec3f a(x-dx, height - (y+dy), 0);
|
---|
| 537 | vec3f b( x, height - y , 0);
|
---|
| 538 | a -= offset;
|
---|
| 539 | b -= offset;
|
---|
| 540 | a /= min;
|
---|
| 541 | b /= min;
|
---|
| 542 |
|
---|
| 543 | a[2] = pow(2.0f, -0.5f * a.length());
|
---|
| 544 | a.normalize();
|
---|
| 545 | b[2] = pow(2.0f, -0.5f * b.length());
|
---|
| 546 | b.normalize();
|
---|
| 547 |
|
---|
| 548 |
|
---|
| 549 | vec3f axis = a.cross(b);
|
---|
| 550 | axis.normalize();
|
---|
| 551 |
|
---|
| 552 | float angle = acos(a.dot(b));
|
---|
| 553 |
|
---|
| 554 | if(parent_rotation != 0) parent_rotation->mult_vec(axis);
|
---|
| 555 |
|
---|
| 556 | if(invert_increment)
|
---|
| 557 | incr.set_value(axis, -angle * scale);
|
---|
| 558 | else
|
---|
| 559 | incr.set_value(axis, angle * scale);
|
---|
| 560 |
|
---|
| 561 | }
|
---|
| 562 |
|
---|
| 563 | // fixme: shouldn't operator*() preserve 'r' in this case?
|
---|
| 564 | if(incr[3] != 0)
|
---|
| 565 | r = incr * r;
|
---|
| 566 | glutPostRedisplay();
|
---|
| 567 | }
|
---|
| 568 |
|
---|
| 569 | void increment_rotation()
|
---|
| 570 | {
|
---|
| 571 | if(active) return;
|
---|
| 572 | // fixme: shouldn't operator*() preserve 'r' in this case?
|
---|
| 573 | if(incr[3] != 0)
|
---|
| 574 | r = incr * r;
|
---|
| 575 | glutPostRedisplay();
|
---|
| 576 | }
|
---|
| 577 |
|
---|
| 578 | void apply_transform()
|
---|
| 579 | {
|
---|
| 580 | glTranslatef(centroid[0], centroid[1], centroid[2]);
|
---|
| 581 | glh_rotate(r);
|
---|
| 582 | glTranslatef(-centroid[0], -centroid[1], -centroid[2]);
|
---|
| 583 | }
|
---|
| 584 |
|
---|
| 585 | void apply_inverse_transform()
|
---|
| 586 | {
|
---|
| 587 | glTranslatef(centroid[0], centroid[1], centroid[2]);
|
---|
| 588 | glh_rotate(r.inverse());
|
---|
| 589 | glTranslatef(-centroid[0], -centroid[1], -centroid[2]);
|
---|
| 590 | }
|
---|
| 591 |
|
---|
| 592 |
|
---|
| 593 | matrix4f get_transform()
|
---|
| 594 | {
|
---|
| 595 | matrix4f mt, mr, minvt;
|
---|
| 596 | mt.set_translate(centroid);
|
---|
| 597 | r.get_value(mr);
|
---|
| 598 | minvt.set_translate(-centroid);
|
---|
| 599 | return mt * mr * minvt;
|
---|
| 600 | }
|
---|
| 601 |
|
---|
| 602 | matrix4f get_inverse_transform()
|
---|
| 603 | {
|
---|
| 604 | matrix4f mt, mr, minvt;
|
---|
| 605 | mt.set_translate(centroid);
|
---|
| 606 | r.inverse().get_value(mr);
|
---|
| 607 | minvt.set_translate(-centroid);
|
---|
| 608 | return mt * mr * minvt;
|
---|
| 609 | }
|
---|
| 610 |
|
---|
| 611 | bool invert_increment;
|
---|
| 612 | const rotationf * parent_rotation;
|
---|
| 613 | rotationf r;
|
---|
| 614 | vec3f centroid;
|
---|
| 615 | float scale;
|
---|
| 616 | bool legacy_mode;
|
---|
| 617 | rotationf incr;
|
---|
| 618 | };
|
---|
| 619 |
|
---|
| 620 |
|
---|
| 621 | class glut_rotate : public glut_simple_interactor
|
---|
| 622 | {
|
---|
| 623 | public:
|
---|
| 624 | glut_rotate()
|
---|
| 625 | {
|
---|
| 626 | rotate_x = rotate_y = 0;
|
---|
| 627 | scale = 1;
|
---|
| 628 | }
|
---|
| 629 | void update()
|
---|
| 630 | {
|
---|
| 631 | rotate_x += dx * scale;
|
---|
| 632 | rotate_y += dy * scale;
|
---|
| 633 | glutPostRedisplay();
|
---|
| 634 | }
|
---|
| 635 |
|
---|
| 636 | void apply_transform()
|
---|
| 637 | {
|
---|
| 638 | glRotatef(rotate_x, 0, 1, 0);
|
---|
| 639 | glRotatef(rotate_y, -1, 0, 0);
|
---|
| 640 | }
|
---|
| 641 |
|
---|
| 642 | void apply_inverse_transform()
|
---|
| 643 | {
|
---|
| 644 | glRotatef(-rotate_y, -1, 0, 0);
|
---|
| 645 | glRotatef(-rotate_x, 0, 1, 0);
|
---|
| 646 | }
|
---|
| 647 |
|
---|
| 648 | matrix4f get_transform()
|
---|
| 649 | {
|
---|
| 650 | rotationf rx(to_radians(rotate_x), 0, 1, 0);
|
---|
| 651 | rotationf ry(to_radians(rotate_y), -1, 0, 0);
|
---|
| 652 | matrix4f mx, my;
|
---|
| 653 | rx.get_value(mx);
|
---|
| 654 | ry.get_value(my);
|
---|
| 655 | return mx * my;
|
---|
| 656 | }
|
---|
| 657 |
|
---|
| 658 | matrix4f get_inverse_transform()
|
---|
| 659 | {
|
---|
| 660 | rotationf rx(to_radians(-rotate_x), 0, 1, 0);
|
---|
| 661 | rotationf ry(to_radians(-rotate_y), -1, 0, 0);
|
---|
| 662 | matrix4f mx, my;
|
---|
| 663 | rx.get_value(mx);
|
---|
| 664 | ry.get_value(my);
|
---|
| 665 | return my * mx;
|
---|
| 666 | }
|
---|
| 667 |
|
---|
| 668 | float rotate_x, rotate_y, scale;
|
---|
| 669 | };
|
---|
| 670 |
|
---|
| 671 | class glut_mouse_to_keyboard : public glut_simple_interactor
|
---|
| 672 | {
|
---|
| 673 | public:
|
---|
| 674 | glut_mouse_to_keyboard()
|
---|
| 675 | {
|
---|
| 676 | keyboard_function = 0;
|
---|
| 677 | pos_dx_key = neg_dx_key = pos_dy_key = neg_dy_key = 0;
|
---|
| 678 | }
|
---|
| 679 | void apply_transform() {}
|
---|
| 680 |
|
---|
| 681 | void apply_inverse_transform() {}
|
---|
| 682 |
|
---|
| 683 | matrix4f get_transform() {return matrix4f();}
|
---|
| 684 |
|
---|
| 685 | matrix4f get_inverse_transform() {return matrix4f();}
|
---|
| 686 |
|
---|
| 687 | void update()
|
---|
| 688 | {
|
---|
| 689 | if(!keyboard_function) return;
|
---|
| 690 | if(dx > 0)
|
---|
| 691 | keyboard_function(pos_dx_key, x, y);
|
---|
| 692 | else if(dx < 0)
|
---|
| 693 | keyboard_function(neg_dx_key, x, y);
|
---|
| 694 | if(dy > 0)
|
---|
| 695 | keyboard_function(pos_dy_key, x, y);
|
---|
| 696 | else if(dy < 0)
|
---|
| 697 | keyboard_function(neg_dy_key, x, y);
|
---|
| 698 | }
|
---|
| 699 | unsigned char pos_dx_key, neg_dx_key, pos_dy_key, neg_dy_key;
|
---|
| 700 | void (*keyboard_function)(unsigned char, int, int);
|
---|
| 701 | };
|
---|
| 702 |
|
---|
| 703 | inline void glut_exit_on_escape(unsigned char k, int x = 0, int y = 0)
|
---|
| 704 | { if(k==27) exit(0); }
|
---|
| 705 |
|
---|
| 706 | struct glut_simple_mouse_interactor : public glut_interactor
|
---|
| 707 | {
|
---|
| 708 |
|
---|
| 709 | public:
|
---|
| 710 | glut_simple_mouse_interactor(int num_buttons_to_use=3)
|
---|
| 711 | {
|
---|
| 712 | configure_buttons(num_buttons_to_use);
|
---|
| 713 | camera_mode = false;
|
---|
| 714 | }
|
---|
| 715 |
|
---|
| 716 | void enable()
|
---|
| 717 | {
|
---|
| 718 | trackball.enable();
|
---|
| 719 | pan.enable();
|
---|
| 720 | dolly.enable();
|
---|
| 721 | }
|
---|
| 722 |
|
---|
| 723 | void disable()
|
---|
| 724 | {
|
---|
| 725 | trackball.disable();
|
---|
| 726 | pan.disable();
|
---|
| 727 | dolly.disable();
|
---|
| 728 | }
|
---|
| 729 |
|
---|
| 730 | void set_camera_mode(bool cam)
|
---|
| 731 | {
|
---|
| 732 | camera_mode = cam;
|
---|
| 733 | if(camera_mode)
|
---|
| 734 | {
|
---|
| 735 | trackball.invert_increment = true;
|
---|
| 736 | pan.invert_increment = true;
|
---|
| 737 | dolly.invert_increment = true;
|
---|
| 738 | pan.parent_rotation = & trackball.r;
|
---|
| 739 | dolly.parent_rotation = & trackball.r;
|
---|
| 740 | }
|
---|
| 741 | else
|
---|
| 742 | {
|
---|
| 743 | trackball.invert_increment = false;
|
---|
| 744 | pan.invert_increment = false;
|
---|
| 745 | dolly.invert_increment = false;
|
---|
| 746 | if(pan.parent_rotation == &trackball.r) pan.parent_rotation = 0;
|
---|
| 747 | if(dolly.parent_rotation == &trackball.r) dolly.parent_rotation = 0;
|
---|
| 748 | }
|
---|
| 749 | }
|
---|
| 750 | void configure_buttons(int num_buttons_to_use = 3)
|
---|
| 751 | {
|
---|
| 752 | switch(num_buttons_to_use)
|
---|
| 753 | {
|
---|
| 754 | case 1:
|
---|
| 755 | trackball.activate_on = GLUT_LEFT_BUTTON;
|
---|
| 756 | trackball.modifiers = 0;
|
---|
| 757 |
|
---|
| 758 | pan.activate_on = GLUT_LEFT_BUTTON;
|
---|
| 759 | pan.modifiers = GLUT_ACTIVE_SHIFT;
|
---|
| 760 |
|
---|
| 761 |
|
---|
| 762 | dolly.activate_on = GLUT_LEFT_BUTTON;
|
---|
| 763 | dolly.modifiers = GLUT_ACTIVE_CTRL;
|
---|
| 764 |
|
---|
| 765 | break;
|
---|
| 766 |
|
---|
| 767 | case 2:
|
---|
| 768 | trackball.activate_on = GLUT_LEFT_BUTTON;
|
---|
| 769 | trackball.modifiers = 0;
|
---|
| 770 |
|
---|
| 771 | pan.activate_on = GLUT_MIDDLE_BUTTON;
|
---|
| 772 | pan.modifiers = 0;
|
---|
| 773 |
|
---|
| 774 |
|
---|
| 775 | dolly.activate_on = GLUT_LEFT_BUTTON;
|
---|
| 776 | dolly.modifiers = GLUT_ACTIVE_CTRL;
|
---|
| 777 |
|
---|
| 778 | break;
|
---|
| 779 |
|
---|
| 780 | case 3:
|
---|
| 781 | default:
|
---|
| 782 | trackball.activate_on = GLUT_LEFT_BUTTON;
|
---|
| 783 | trackball.modifiers = 0;
|
---|
| 784 |
|
---|
| 785 | pan.activate_on = GLUT_MIDDLE_BUTTON;
|
---|
| 786 | pan.modifiers = 0;
|
---|
| 787 |
|
---|
| 788 | dolly.activate_on = GLUT_RIGHT_BUTTON;
|
---|
| 789 | dolly.modifiers = 0;
|
---|
| 790 |
|
---|
| 791 | break;
|
---|
| 792 | }
|
---|
| 793 | }
|
---|
| 794 |
|
---|
| 795 | virtual void motion(int x, int y)
|
---|
| 796 | {
|
---|
| 797 |
|
---|
| 798 | trackball.motion(x,y);
|
---|
| 799 |
|
---|
| 800 | pan.motion(x,y);
|
---|
| 801 |
|
---|
| 802 | dolly.motion(x,y);
|
---|
| 803 | }
|
---|
| 804 | virtual void mouse(int button, int state, int x, int y)
|
---|
| 805 | {
|
---|
| 806 | trackball.mouse(button, state, x, y);
|
---|
| 807 | pan.mouse(button, state, x, y);
|
---|
| 808 | dolly.mouse(button, state, x, y);
|
---|
| 809 | }
|
---|
| 810 |
|
---|
| 811 | virtual void reshape(int x, int y)
|
---|
| 812 | {
|
---|
| 813 | trackball.reshape(x,y);
|
---|
| 814 | pan.reshape(x,y);
|
---|
| 815 | dolly.reshape(x,y);
|
---|
| 816 | }
|
---|
| 817 |
|
---|
| 818 | void apply_transform()
|
---|
| 819 | {
|
---|
| 820 | pan.apply_transform();
|
---|
| 821 | dolly.apply_transform();
|
---|
| 822 | trackball.apply_transform();
|
---|
| 823 | }
|
---|
| 824 |
|
---|
| 825 | void apply_inverse_transform()
|
---|
| 826 | {
|
---|
| 827 | trackball.apply_inverse_transform();
|
---|
| 828 | dolly.apply_inverse_transform();
|
---|
| 829 | pan.apply_inverse_transform();
|
---|
| 830 | }
|
---|
| 831 |
|
---|
| 832 | matrix4f get_transform()
|
---|
| 833 | {
|
---|
| 834 | return ( pan.get_transform() *
|
---|
| 835 | dolly.get_transform() *
|
---|
| 836 | trackball.get_transform() );
|
---|
| 837 | }
|
---|
| 838 |
|
---|
| 839 | matrix4f get_inverse_transform()
|
---|
| 840 | {
|
---|
| 841 | return ( trackball.get_inverse_transform() *
|
---|
| 842 | dolly.get_inverse_transform() *
|
---|
| 843 | pan.get_inverse_transform() );
|
---|
| 844 | }
|
---|
| 845 |
|
---|
| 846 | void set_parent_rotation(rotationf *rp)
|
---|
| 847 | {
|
---|
| 848 | trackball.parent_rotation = rp;
|
---|
| 849 | dolly.parent_rotation = rp;
|
---|
| 850 | pan.parent_rotation = rp;
|
---|
| 851 | }
|
---|
| 852 |
|
---|
| 853 | bool camera_mode;
|
---|
| 854 | glut_trackball trackball;
|
---|
| 855 | glut_pan pan;
|
---|
| 856 | glut_dolly dolly;
|
---|
| 857 | };
|
---|
| 858 |
|
---|
| 859 | }
|
---|
| 860 |
|
---|
| 861 | #endif
|
---|