UserDef Terrain Types

Hi All,

I've finally managed to solve all my problems getting
my scenery to build correctly. Many thanks for all the
patient answers.

I've been adding custom terrain on top of vmap0 using
TGUserDef, which is more useful for my purposes than
using FGSD as I want to be able to regenerate scenery
from scratch.

However, the scenery ordering in Lib/Polygon/names.cxx
can cause a problem. This handles the precedence of
scenery when an intersection occurs, something that
happens a lot when using TGUserDef on top of existing
scenery.

The current ordering is something like this:
-Airport
-Marsh
-Roads
-Urban
-Town
-Crops
-Forest
-Ocean

So, if you add a Road using TGUserDef it will appear
instead of any underlying terrain, but if you try to
add some sort of Forest where there is currently a
Town, it won't appear because the Town has higher
precedence.

I've solved this problem on my own system by adding a
series of User* terrains to names.[ch]xx as follows:

-Airport
-UserMarsh
-Marsh
-UserRoads
-Roads
-UserUrban
-UserTown
-UserCrops
-UserForest
-UserOcean
-Urban
-Town
-Crops
-Forest
-Ocean

This ensures that custome terrain is displayed in
preference to vmap0, while allowing the existing roads
to show through. Obviously I had to add the new User*
terrains to materials.xml as well.

Do people feel this is a good solution to the issue?

If so, I'd like to get the fix into the TerraGear and
FlightGear source. How do I do this - email the
changes to Curtis?

-Stuart


		
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