84 lines
1.8 KiB
C
84 lines
1.8 KiB
C
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/*
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* double.c
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* This program demonstrates double buffering for
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* flicker-free animation. The left and middle mouse
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* buttons start and stop the spinning motion of the square.
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*/
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#include <windows.h>
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#include <GL/gl.h>
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#include <GL/glu.h>
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#include "glaux.h"
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static GLfloat spin = 0.0;
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void display(void)
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{
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glClear (GL_COLOR_BUFFER_BIT);
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glPushMatrix ();
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glRotatef (spin, 0.0, 0.0, 1.0);
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glRectf (-25.0, -25.0, 25.0, 25.0);
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glPopMatrix ();
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glFlush();
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// glXSwapBuffers (auxXDisplay(), auxXWindow());
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auxSwapBuffers();
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}
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void spinDisplay (void)
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{
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spin = spin + 2.0;
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if (spin > 360.0)
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spin = spin - 360.0;
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display();
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}
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void startIdleFunc (AUX_EVENTREC *event)
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{
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auxIdleFunc(spinDisplay);
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}
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void stopIdleFunc (AUX_EVENTREC *event)
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{
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auxIdleFunc(0);
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}
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void myinit (void)
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{
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glClearColor (0.0, 0.0, 0.0, 1.0);
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glColor3f (1.0, 1.0, 1.0);
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glShadeModel (GL_FLAT);
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}
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void myReshape(GLsizei w, GLsizei h)
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{
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glViewport(0, 0, w, h);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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if (w <= h)
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glOrtho (-50.0, 50.0, -50.0*(GLfloat)h/(GLfloat)w,
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50.0*(GLfloat)h/(GLfloat)w, -1.0, 1.0);
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else
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glOrtho (-50.0*(GLfloat)w/(GLfloat)h,
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50.0*(GLfloat)w/(GLfloat)h, -50.0, 50.0, -1.0, 1.0);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity ();
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}
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/* Main Loop
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* Open window with initial window size, title bar,
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* RGBA display mode, and handle input events.
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*/
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int main(int argc, char** argv)
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{
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auxInitDisplayMode (AUX_DOUBLE | AUX_RGB);
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auxInitPosition (0, 0, 500, 500);
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auxInitWindow (argv[0]);
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myinit ();
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auxReshapeFunc (myReshape);
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auxIdleFunc (spinDisplay);
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auxMouseFunc (AUX_LEFTBUTTON, AUX_MOUSEDOWN, startIdleFunc);
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auxMouseFunc (AUX_MIDDLEBUTTON, AUX_MOUSEDOWN, stopIdleFunc);
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auxMainLoop(display);
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}
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