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                           : CGApplication::RightMouseButton);
 47     activeCGApplication_->onButton(activeMouseButton_,
 48                                  ((state == GLUT_DOWN)
 49                                   ? CGApplication::MouseButtonDown                                   : CGApplication::MouseButtonUp),
 50                                  x, y);
 51 }
 52
 53 // glut-Callback fuer das Ziehen bei gedrueckter Maustaste
 54 static void motionFunc(int x, int y) {
 55     assert(activeCGApplication_);
 56     y = glutGet(GLenum(GLUT_WINDOW_HEIGHT)) - y; // Koordinaten-Ursprung: links unten!!!
 57     activeCGApplication_->onMove(activeMouseButton_, x, y);
 58 }
 59
 60 // glut-Callback fuer einen Tastendruck
 61 static void keyboardFunc(unsigned char key, int x, int y) {
 62     assert(activeCGApplication_);
 63     activeCGApplication_->onKey(key);
 64 }
 65
 66 // glut-Callback fuer ein Timer-Event
 67 static void timerFunc(int msecs) {
 68     assert(activeCGApplication_);
 69     activeCGApplication_->onTimer();
 70     glutTimerFunc(msecs, timerFunc, msecs);
 71 }
 72
 73 void CGApplication::start(int argc, char* argv[],
 74                           const char* windowTitle,
 75                           unsigned int buffers, unsigned int msecsTimer,
 76                           unsigned long width, unsigned long height) {
 77     assert(buffers & ColorBuffer);
 78
 79     // Initialisiert Glut
 80     glutInit(&argc, argv);
 81
 82     // Fordert ein OpenGL-Fenster im RGB-Format mit oder ohne Double-Buffering an:
 83     glutInitDisplayMode(GLUT_RGB                         | ((buffers & DepthBuffer) ? GLUT_DEPTH : 0)
 84                         | ((buffers & DoubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE)
 85                         | ((buffers & StencilBuffer) ? GLUT_STENCIL : 0));
 86
 87     // Legt die Fenstergroesse fest:
 88     glutInitWindowSize(width, height);
 89
 90     // Erzeugt das OpenGL-Fenster mit dem entsprechenden Namen:
 91     glutCreateWindow(windowTitle);
 92
 93     // Registriere die oben definierten Callbacks fuer die
 94     // entsprechenden glut-Ereignisse:
 95     glutDisplayFunc(displayFunc);
 96     glutReshapeFunc(reshapeFunc);
 97     glutMouseFunc(mouseFunc);
 98     glutMotionFunc(motionFunc);
 99     glutKeyboardFunc(keyboardFunc);
100
101     if(msecsTimer > 0) { glutTimerFunc(msecsTimer, timerFunc, msecsTimer); }
102
103     // Zeige das OpenGL-Fenster auf dem Bildschirm an
104     glutShowWindow();
105
106     // Rufe die Methode zur Initialisierung von OpenGL auf:
107     onInit();
108
109     // Starte die Verarbeitung der glut-Ereignisse:
110     glutMainLoop();
111 }
112
113 void CGApplication::needsRedraw() {
114     glutPostRedisplay();
115 }
116
117 void CGApplication::swapBuffers() {
118     glutSwapBuffers();
119 }
120
121

©2001, 2024 Stephan Brumme