attribute.cpp (1.1k)
attribute.h (1.5k)
cgapplication.cpp (4.1k)
cgapplication.h (4.8k)
cgrobot.cpp (7.9k)
cgrobot.h (716 bytes)
node.cpp (2.4k)
node.h (2.3k)
shape.cpp (3.2k)
shape.h (966 bytes)
transformation.cpp (2.9k)
transformation.h (2.4k)
vector.cpp (1.4k)
vector.h (5.3k)


more info here

  1 // Computergraphik I
  2 // Prof. Dr. Juergen Doellner
  3 // Sommersemester 2001
  4 //
  5 // Rahmenprogramm fuer Aufgabenzettel 8
  6
  7 #include "cgapplication.h"
  8
  9 // Diese Variable enthaelt einen Zeiger auf die aktive Anwendung.
 10 static CGApplication* activeCGApplication_ = 0;
 11 static CGApplication::MouseButton activeMouseButton_ = CGApplication::LeftMouseButton;
 12
 13 CGApplication::CGApplication() {
 14     assert(!activeCGApplication_); // Es ist nur eine aktive Anwendung erlaubt!!!
 15     activeCGApplication_ = this;
 16 }
 17
 18 CGApplication::~CGApplication() {
 19     activeCGApplication_ = 0;
 20 }
 21
 22 // Auf diese Ereignisse wird default-maessig nicht reagiert:
 23 void CGApplication::onInit() { }
 24 void CGApplication::onButton(MouseButton button, MouseButtonEvent event, int x, int y) { }
 25 void CGApplication::onMove(MouseButton buttoin, int x, int y) { }
 26 void CGApplication::onKey(unsigned char key) { }
 27 void CGApplication::onTimer() { }
 28
 29 // glut-Callback fuer den Zeichenaufruf
 30 static void displayFunc() {
 31     assert(activeCGApplication_);
 32     activeCGApplication_->onDraw();
 33 }
 34
 35 // glut-Callback fuer die Aenderung der Fenstergroesse
 36 static void reshapeFunc(int newWidth, int newHeight) {
 37     assert(activeCGApplication_);
 38     activeCGApplication_->onSize(newWidth, newHeight);
 39 }
 40
 41 // glut-Callback fuer das Druecken einer Maustaste
 42 static void mouseFunc(int button, int state, int x, int y) {
 43     assert(activeCGApplication_);
 44     y = glutGet(GLenum(GLUT_WINDOW_HEIGHT)) - y; // Koordinaten-Ursprung: links unten!!!
 45     activeMouseButton_ = ((button == GLUT_LEFT_BUTTON)
 46                           ? CGApplication::LeftMouseButton
 47                           : CGApplication::RightMouseButton);
 48     activeCGApplication_->onButton(activeMouseButton_,
 49                                  ((state == GLUT_DOWN)
 50                                   ? CGApplication::MouseButtonDown
 51                                   : CGApplication::MouseButtonUp),
 52                                  x, y);
 53 }
 54
 55 // glut-Callback fuer das Ziehen bei gedrueckter Maustaste
 56 static void motionFunc(int x, int y) {
 57     assert(activeCGApplication_);
 58     y = glutGet(GLenum(GLUT_WINDOW_HEIGHT)) - y; // Koordinaten-Ursprung: links unten!!!
 59     activeCGApplication_->onMove(activeMouseButton_, x, y);
 60 }
 61
 62 // glut-Callback fuer einen Tastendruck
 63 static void keyboardFunc(unsigned char key, int x, int y) {
 64     assert(activeCGApplication_);
 65     activeCGApplication_->onKey(key);
 66 }
 67
 68 // glut-Callback fuer ein Timer-Event
 69 static void timerFunc(int msecs) {
 70     assert(activeCGApplication_);
 71     activeCGApplication_->onTimer();
 72     glutTimerFunc(msecs, timerFunc, msecs);
 73 }
 74
 75 void CGApplication::start(int argc, char* argv[],
 76                           const char* windowTitle,
 77                           unsigned int buffers, unsigned int msecsTimer,
 78                           unsigned long width, unsigned long height) {
 79     assert(buffers & ColorBuffer);
 80
 81     // Initialisiert Glut
 82     glutInit(&argc, argv);
 83
 84     // Fordert ein OpenGL-Fenster im RGB-Format mit oder ohne Double-Buffering an:
 85     glutInitDisplayMode(GLUT_RGB
 86                         | ((buffers & DepthBuffer) ? GLUT_DEPTH : 0)
 87                         | ((buffers & DoubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE)
 88                         | ((buffers & StencilBuffer) ? GLUT_STENCIL : 0));
 89
 90     // Legt die Fenstergroesse fest:
 91     glutInitWindowSize(width, height);
 92
 93     // Erzeugt das OpenGL-Fenster mit dem entsprechenden Namen:
 94     glutCreateWindow(windowTitle);
 95
 96     // Registriere die oben definierten Callbacks fuer die
 97     // entsprechenden glut-Ereignisse:
 98     glutDisplayFunc(displayFunc);
 99     glutReshapeFunc(reshapeFunc);
100     glutMouseFunc(mouseFunc);
101     glutMotionFunc(motionFunc);
102     glutKeyboardFunc(keyboardFunc);
103
104     if(msecsTimer > 0) { glutTimerFunc(msecsTimer, timerFunc, msecsTimer); }
105
106     // Zeige das OpenGL-Fenster auf dem Bildschirm an
107     glutShowWindow();
108
109     // Rufe die Methode zur Initialisierung von OpenGL auf:
110     onInit();
111
112     // Starte die Verarbeitung der glut-Ereignisse:
113     glutMainLoop();
114 }
115
116 void CGApplication::needsRedraw() {
117     glutPostRedisplay();
118 }
119
120 void CGApplication::swapBuffers() {
121     glutSwapBuffers();
122 }
123

©2001, 2012 Stephan Brumme
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