Method GLU.gluOrtho2D() Method gluOrtho2D void gluOrtho2D(float left, float right, float bottom, float top) Description gluOrtho2D sets up a two-dimensional orthographic viewing region. This is equivalent to calling glOrtho(left, right, bottom, top, -1.0, 1.0);FIXME The GLU manual says glOrtho(a,b,c,d, 0, 1). See also GL.glOrtho, gluPerspective