Nested Triangles 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);

 glColor3f(1.0,0.0,0.0);

 glBegin(GL_TRIANGLES);

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

{

    glColor3f(-i,i,-i);

    glVertex2f(-i,-i);

    glVertex2f(i,-i);

    glVertex2f(0,i);

}

     glEnd();

     glFlush();

}

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

{

  glutInit(&argc,argv);

  glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);

  glutInitWindowSize(200,200);

  glutInitWindowPosition(0,0);

  glutCreateWindow("Triangulos");

  glutDisplayFunc(display);

  glutMainLoop();

}

Resultado