-void gl_ortho(float left, float right, float bottom, float top, float near, float far);
-void gl_frustum(float left, float right, float bottom, float top, float near, float far);
-void glu_perspective(float vfov, float aspect, float near, float far);
+void gl_ortho(float left, float right, float bottom, float top, float znear, float zfar);
+void gl_frustum(float left, float right, float bottom, float top, float znear, float zfar);
+void glu_perspective(float vfov, float aspect, float znear, float zfar);