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[Freeciv-Dev] (PR#9797) RfP: use T_UNKNOWN instead of T_GRASSLAND for no 		Home

[Freeciv-Dev] (PR#9797) RfP: use T_UNKNOWN instead of T_GRASSLAND for no

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Subject: [Freeciv-Dev] (PR#9797) RfP: use T_UNKNOWN instead of T_GRASSLAND for non-placed mapgen terrains
From: "Jason Short" <jdorje@xxxxxxxxxxxxxxxxxxxxx>
Date: Tue, 24 Aug 2004 11:02:01 -0700
Reply-to: rt@xxxxxxxxxxx 
<URL: http://rt.freeciv.org/Ticket/Display.html?id=9797 >

Mapgen inits all tiles to T_GRASSLAND, then overwrites them with other 
terrains.  T_GRASSLAND is thus just a flag meaning 
"terrain-not-placed-here".  This should be T_UNKNOWN instead.

See also PR#9627.  That patch has a

   #define T_NOT_PLACED T_UNKNOWN

and

   #define not_placed(x, y) (map_get_terrain(x, y) == T_NOT_PLACED)

jason
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