/*
 * (c) Copyright 1993, Silicon Graphics, Inc.
 *               1993-1995 Microsoft Corporation
 *
 * ALL RIGHTS RESERVED
 *
 * Please refer to OpenGL/readme.txt for additional information
 *
 */

/*
 *  sphere.c
 *  This program draws a wire frame sphere.  It uses 
 *  glTranslatef() as a viewing transformation.
 */
#include "glos.h"

#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glaux.h>

void myinit(void);
void CALLBACK display(void);
void CALLBACK myReshape(GLsizei w, GLsizei h);

void CALLBACK display (void)
{
    glClear(GL_COLOR_BUFFER_BIT);
    glColor3f (1.0, 1.0, 1.0);
    glPushMatrix();
/*  glTranslatef() as viewing transformation    */
    glTranslatef (0.0, 0.0, -5.0);
    auxWireSphere(1.0);
    glPopMatrix();
    glFlush();
}

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

void CALLBACK myReshape(GLsizei w, GLsizei h)
{
    h = (h == 0) ? 1 : h;
    glViewport(0, 0, w, h);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(60.0, (GLfloat) w/(GLfloat) h, 1.0, 20.0);
    glMatrixMode(GL_MODELVIEW);
}

/*  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, 400, 400);
    auxInitWindow ("Sphere");
    myinit ();
    auxReshapeFunc (myReshape);
    auxMainLoop(display);
    return(0);
}
