Drawing nested squares OpenGL(GLUT)

Código Fuente

#ifdef __APPLE__

#include <GLUT/glut.h>

#else

#include <GL/gl.h>

#include <GL/glut.h>

#endif

#include <stdlib.h>

static void display(void)

{

glMatrixMode(GL_PROJECTION);

glLoadIdentity();

glClear(GL_COLOR_BUFFER_BIT);

glPointSize(10);

glLineWidth(5);

glBegin(GL_QUADS);

for(double i=1;i>=0;i-=0.1)

{

glColor3f(i,-i,-i);

glVertex2f(-i,i);

glVertex2f(i,i);

glVertex2f(i,-i);

glVertex2f(-i,-i);

}

glEnd();

glFlush();

}

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

{

glutInit(&argc,argv);

glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);

glutInitWindowSize(200,200);

glutInitWindowPosition(0,0);

glutCreateWindow("Cuadros");

glutDisplayFunc(display);

glutMainLoop();

}

Resultado