GM_SetOrientation |
Allows for drawing data with a direction other than north to the top of the screen for most projections. A value of 0.0 is the default and implies no rotation. Technically, the orientation value is the number of degrees to rotate the rendered data counter-clockwise.
SyntaxGM_Error_t32 GM_SetOrientation ( double aOrientation // Orientation of bitmap (0 is north up, 90 is east up, 180 is south up, 270 is west up) );