mapw2 man page on IRIX

mapw2 man page on IRIX

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mapw2(3G)							     mapw2(3G)

NAME
     mapw2 - maps a point on the screen into 2-D world coordinates

C SPECIFICATION
     void mapw2(Object vobj, Screencoord sx, Screencoord sy,
		Coord *wx, Coord *wy)

PARAMETERS
     vobj   expects the transformations that map the displayed objects to
	    world coordinates.

     sx	    expects the x coordinate of the screen point to be mapped.

     sy	    expects the y coordinate of the screen point to be mapped.

     wx	    returns the corresponding x world coordinate.

     wy	    returns the corresponding y world coordinate.

DESCRIPTION
     mapw2 is the 2-D version of mapw.	vobj is a viewing object that defines
     world space.  It contains only routines that affect the model-view
     matrix, the projection matrix, or the viewport specification.  sx and sy
     define a point in screen coordinates.  wx and wy return the corresponding
     world coordinates.	 If the transformation is not 2-D, the result is
     undefined.

SEE ALSO
     mapw

NOTE
     This routine is available only in immediate mode.

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