#include <GL/gl.h>

#include <GL/glu.h>

#include <GL/glut.h>

void init(void);

void display(void);

void reshape(int, int);

void keyboard(unsigned char, int, int);

void idle(void);

int main(int argc, char* argv[])

{

glutInit(&argc, argv);

glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

glutInitWindowPosition(100, 100);

glutInitWindowSize(640, 480);

glutCreateWindow(argv[0]);

init();

glutDisplayFunc(display);

glutReshapeFunc(reshape);

glutKeyboardFunc(keyboard);

glutIdleFunc(idle);

glutMainLoop();

return 0;

}

void init(void)

{

glColor3f(1, 1, 1);

glClearColor(0, 0, 0, 0);

glClearDepth(1);

glEnable(GL_DEPTH_TEST);

glDepthFunc(GL_LEQUAL);

}

void display(void)

{

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

glutSwapBuffers();

}

void reshape(int w, int h)

{

glViewport(0, 0, w, h);

glMatrixMode(GL_PROJECTION);

glLoadIdentity();

gluPerspective(45, (float)w/(float)h, 1, 32);

glMatrixMode(GL_MODELVIEW);

glLoadIdentity();

gluLookAt(5, 5, 5, 0, 0, 0, 0, 1, 0);

}

void keyboard(unsigned char key, int x, int y)

{

switch(key) {

default:

return;

}

}

void idle(void)

{

glutPostRedisplay();

}