Mengenal Program c++ OpenGL

    glLoadIdentity();

    glRotatef(theta, 0.0f, 0.0f, 1.0f);

    glBegin(GL_POLYGON);

    glColor3f(1.0f, 0.0f, 0.0f);

    glVertex3f(-0.6f, -0.75f, 0.5f);

    glColor3f(0.0f, 1.0f, 0.0f);

    glVertex3f(0.0f, 0.75f, 0.0f);

    glColor3f(0.0f, 0.0f, 1.0f);

    glVertex3f(0.6f, -0.75f, 0.0f);

    glEnd();

    glFlush();