PRISMA TRIANGULAR ROTACION

#include <stdlib.h>
#include <GL/glut.h>

GLfloat   angX=0.0f;
GLfloat   angY=0.0f;

void reshape( int width, int height)
{
glViewport(0,0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(-13,17,-15,15,-15,15);
glMatrixMode(GL_MODELVIEW);
}
void display()
{
glClear(GL_COLOR_BUFFER_BIT);
glColor3f(1.0,0.0,0.0);
glLoadIdentity();

glRotatef(angX,1,0,0);
glRotatef(angY,0,1,0);

glBegin(GL_TRIANGLES);
glColor3f(1.0,0.0,0.0);
glVertex3f(0,0,0);
glVertex3f(0,0,3);
glVertex3f(1.5,3,1.5);
glVertex3f(0,0,0);
glEnd();
glBegin(GL_TRIANGLES);
glColor3f(0.0,1.0,0.0);
glVertex3f(3,0,0);
glVertex3f(3,0,3);
glVertex3f(1.5,3,1.5);
glVertex3f(3,0,0);
glEnd();
glBegin(GL_TRIANGLES);
glColor3f(0.0,0.0,1.0);
glVertex3f(0,0,3);
glVertex3f(3,0,3);
glVertex3f(1.5,3,1.5);
glVertex3f(0,0,3);
glEnd();
glBegin(GL_TRIANGLES);
glColor3f(1.0,1.0,0.0);
glVertex3f(0,0,0);
glVertex3f(3,0,0);
glVertex3f(1.5,3,1.5);
glVertex3f(0,0,0);
glEnd();

glBegin(GL_POLYGON);
glColor3f(1.0,0.0,1.0);
glVertex3f(0,0,0);
glVertex3f(3,0,0);
glVertex3f(3,0,3);
glVertex3f(0,0,3);
glEnd();

glFlush();
glutSwapBuffers();
    angX+=0.1f;
    angY+=0.1f;
}
 void init()
{
glClearColor(0,0,0,0);
//glEnable(GL_DEPTH_TEST);
}

void idle()
{
    display();
}

int main (int argc, char **argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
glutInitWindowPosition(50,50);
glutInitWindowSize(500,500);
glutCreateWindow("PRISMA TRIANGULAR");
init();
glutDisplayFunc(display);
glutReshapeFunc(reshape);
glutIdleFunc(idle);
glutMainLoop();
return 0;
}