/*
 *  cube.c
 *  Draws a 3-D cube, viewed with perspective, stretched 
 *  along the y-axis.
 */

#include <GL/gl.h>
#include <GL/glu.h>
#include "aux.h"

/*  Clear the screen.  Set the current color to white.
 *  Draw the wire frame cube.
 */
void display (void)
{
    glClear(GL_COLOR_BUFFER_BIT);
    glColor3f (1.0, 1.0, 1.0);
    glLoadIdentity ();	/*  clear the matrix	*/
    glTranslatef (0.0, 0.0, -5.0);	/*  viewing transformation	*/
    glScalef (1.0, 2.0, 1.0);	/*  modeling transformation	*/
    auxWireCube(1.0);	/*  draw the cube	*/
    glFlush();
}

void myinit (void) { glShadeModel (GL_FLAT); }

/*  Called when the window is first opened and whenever 
 *  the window is reconfigured (moved or resized).  */
void myReshape(int w, int h)
{
    glMatrixMode (GL_PROJECTION);	/*  prepare for and then  */ 
    glLoadIdentity ();	/*  define the projection  */
    glFrustum (-1.0, 1.0, -1.0, 1.0, 1.5, 20.0);	/*  transformation  */
    glMatrixMode (GL_MODELVIEW);	/*  back to modelview matrix	*/
    glViewport (0, 0, w, h);	/*  define the viewport	*/
}

/*  Main Loop
 *  Open window with initial window size, title bar, 
 *  RGBA display mode, and handle input events.  */
int main(int argc, char** argv)
{
    auxInitDisplayMode (AUX_SINGLE | AUX_RGB);
    auxInitPosition (0, 0, 500, 500);
    auxInitWindow (argv[0]);
    myinit ();
    auxReshapeFunc (myReshape);
    auxMainLoop(display);
}