How to retrieve pointer to terrain from loaded scene - Blitzmax Style

[Kronos]

Using the method of cycling through all child entities of the scene will only return terrain as an entity. How can I get it as a terrain. I need to be able to access the terrain to retrieve height information via terrainelevation().

 

This code doesn't work because you can't cast from entity to terrain.

 

Local Myscene:TEntity = loadscene("media\myscene2.sbx");
Local ent:TEntity
Local terrain:TTerrain

DebugLog "countChildren = "+CountChildren(myscene)


For i = 1 To CountChildren(myscene)
ent = GetChild(myscene,i)
If GetEntityKey(ent,"class") = "Terrain" Then terrain=ent <--no good!!

Next

 

Thanks in advance.

[Flexman]

Try casting, like this?

 

If GetEntityKey(ent,"class") = "Terrain" Then terrain=TTerrain(ent)

[macklebee]

yes that should work... i was confirming that exact code myself when you replied Flexman, and it appears to work... or at least doesn't cause errors...

[Flexman]

Casting is how I get to the loaded map layers for generating an overhead map, and this is how Josh does it in the editor too. So it's prety safe.

 

Local cmap:TBuffer = TTerrain(game.scene.terrain).colormapbuffer;
TTerrain(game.scene.terrain).normaltexture.Bind(1) ;
SetShader(map_shader) ;
...
...
DrawImage(cmap.colorbuffer[0], 0, TSD_MAPSIZE, TSD_MAPSIZE, -TSD_MAPSIZE) ;

 

You can get the heightmap and mapsize goodies too. So it's very handy.

[macklebee]

nice... very handy... now please list how you coded the rest of combat helo in detail

[Kronos]

Confirmed that works fine for me. Thanks folks