Creating Polygons with Height

[Chris Sykes]

Hi all,

another stupid FSX KML question here...

Im trying to add into FSX an island (more precise its a donut shaped trial reservoir in the Wash UK). So far i have managed to get the island in FSX OK, but when i try to add height all i get is a little mound in the middle, nothing like what im try to achieve. What im really want to achieve is basically a donut shapped moat!

What i have in FSX KML is such as below;

Large (Outer part of the donut) landclass poly grass with height of 0
Middle Polygonhole
Middle (the thick part of the donut) landlass poly grass with height of 10
small Polygonhole
small (the inner part of the donut) landlass poly grass with height of 0

I would really appreciate any help with this, if its not possible with this ill leave it just as an island...

 

[Dave Torkington]

Hi Chris,

Why not create the island / moat in Gmax?

Dave.

 

[GaryGB]

Hi Chris:

If you don't get a satisfactory answer here, consider that additional answers might be forthcoming from other users in the FSX-KML support forum at:

http://www.fsdeveloper.com/forum/forumdisplay.php?f=81

...and that there are other methods to do this using SBuilderX.


Alternatively, one might use either "nested / layered flattens" and/or "sloped / tilted flattens" created via SBuilderX or ADE; their support forums at PTSim and FSDeveloper might also yield some suggestions from other users, in addition to inquiring at AVSIM Scenery Design Forum:

http://www.ptsim.com/forum/viewforum.php?f=22&sid=ac00af8a04f78792fd03240d48085c9b

http://www.fsdeveloper.com/forum/forumdisplay.php?f=95

http://www.fsdeveloper.com/forum/forumdisplay.php?f=33

http://forum.avsim.net/forum/123-msfs-scenery-design-forum/


FYI: By keeping the terrain changes "in the terrain mesh" via the above methods, land class and superimposed autogen objects can be displayed which is also responsive to seasonal change.

If a custom GMAX / Sketchup 3D scenery object were used for the "reservoir", it would not only be unable to display Autogen (and therefore unable to change any autogen seasonally), it would also likely obliterate nearby autogen... unless special 'tweaks' were implemented before exporting the FSX MDL file.


One would then have to cover the reservoir ground area with either a land class polygon "texture" or individually placed scenery library objects rather than autogen objects, which in either case would not change seasonally, and which might also have a somewhat greater impact on FPS.

If the reservoir is simply a grassy area, then I suppose objects such a trees etc. would be less of a matter of concern, aside from the grass texture not changing seasonally.


Hope this info helps as you consider your options. :mixedsmi:

GaryGB

 

[Chris Sykes]

Hi, thanks for your replies. Firstly i have no clue about using GMAX or any other 3D software to create this, I was hope for the simple way of using FSXKML for heights.

I may look at trying my hand at 3D modeling at some point...

 

[ananda]

How can you have a donut with a large, two middles and two smalls?

A picture might help us visualize it.

George

 

[Chris Sykes]

Haha thought that might confuse you, there are polygon holes that cut a hole in the previous polygon, this is used when for instance placing a dirt stip in a clearing, you need the grass field first, then a polygon hole for the runway then the runway after this.