Точка
glVertex2i() - int
glVertex2s() - short
glVertex2f() - float
glVertex2d() - double
// 1
glVertex2f(0.0, 0.0);
//2
glVertex3f(0.0, 0.0, 0.0);
glVertex2i() - int
glVertex2s() - short
glVertex2f() - float
glVertex2d() - double
// 1
glVertex2f(0.0, 0.0);
//2
glVertex3f(0.0, 0.0, 0.0);