STATE_polygon_is_valid

 

 



   Checks if all the points are on the same plane
   if there are less than three points etc ... The function also sets internal info
   returns YES if the polygon is valid or NO (if not valid).
   If the answer is NO it is usually because the polygon is
   not convex or because the points are not on the same
   plane or the bitmap cords are not good or the light intensity cords are not good.
   When doing STATE_engine_add_polygon() this check is done
   automatically so it is impossible to add a bad polygon

 

 

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