Details Ticket 242


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Serial Number 242
Subject R_polygon_abs() seems to ignore islands
Area wish
Queue grass
Requestors neteler@geog.uni-hannover.de
Owner none
Status resolved
Last User Contact Never contacted
Current Priority 30
Final Priority 70
Due No date assigned
Last Action Wed Sep 27 01:22:17 2006 (2 yr ago)
Created Wed May 2 13:27:49 2001 (7 yr ago)

Transaction History Ticket 242


Wed, May 2 2001 13:27:49    Request created by mneteler  
Subject: R_polygon_abs() seems to ignore islands

- Vector:
  R_polygon_abs() seems to ignore islands. Correct?

  Comment from Eric Miller:
   While skimming through the BUG list, there's a report about
   R_Polygon_abs() ignoring islands.  A little investigation would show this
to be correct.  However, each display driver must implement this
   individually, and I only looked at the XDRIVER24 version.
   Anyway,  the code is real simple and does not do anything other than draw
a filled polygon based on supplied display coordinates and the already   
   set fill color.  Presumably it is up to the caller to handle
   islands/holes. However, this is probably not a simple task when drawing a
filled polygon cover over other layers.  Perhaps what is wanted is a high
   level vector drawing command such as some of the commands in the
   partially functional DISPLAYLIB???  I don't know X well enough to know if
it has a way to handle holes in it's polygon drawing routines.
   A little more context for the BUG report seems in order since this really
doesn't seem to be a "bug", but a shortcoming.
Wed, Aug 8 2001 07:17:48    Comments added by egmiller  
Not a bug.  That's just the behavior.  Islands/Holes need to be accomodated
further up the chain.
Wed, Aug 8 2001 07:18:02    Status changed to resolved by egmiller  
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