Terrain updateFromHeightMap() issue

Troubleshooting General Help
1

Hi all, while trying to work with the terrain, I have had an issue when updateFromHeightMap, the issue appears, when you serialize your terrain, then try to recreate it from the serialized file. I just used the plain creation from the height maps, when I load it, it just appears fine, but when try to invoke updateFromHeightMap, I got something like this image:









Again it only happends when you serialize the terrainpage/terrainblock mesh.



Thanks in advance.

2

So after a quick scan, the big difference I see is that I'm extending TriMesh instead of AreaClodMesh.  So it seems like the onus is back on the clods.

3

That is really cool looking! 8)

4

the index buffers look broken to me (speculating - at work, can't test - sorry). i suppose the object ins the screenshot is a terrain page. the terrain blocks are placed correctly, only the triangles are messed up (they don't look like anything how they should look like). again, just speculating: could it be that you save clod meshes?



sorry for not being really helpful :stuck_out_tongue:

5

Maybe you could just change your game concept into something where a giant piece of aluminum foil is slowly comsuming the earth and your character must find a way to destroy it?

6
chirstius said:

Maybe you could just change your game concept into something where a giant piece of aluminum foil is slowly comsuming the earth and your character must find a way to destroy it?


XD
7

XD

8

Looks almost like a clod issue…  Can you use binaryimport/export instead of serializing?

9
i suppose the object ins the screenshot is a terrain page. the terrain blocks are placed correctly, only the triangles are messed up

Exactly. The terrain blocks extends the clodmesh, so it might be the reson. I don't know.

Can you use binaryimport/export instead of serializing?


renanse, thats what I have used. Binary import/export to serialize the terrian page, nothing extra from me, I just used the facilities you provided, first I created a terrain page, then saved it to a file with the exporter, then I loadeded it for editing.
10
renanse said:

Looks almost like a clod issue...
11
Can you use binaryimport/export instead of serializing?


renanse, thats what I have used. Binary import/export to serialize the terrian page, nothing extra from me, I just used the facilities you provided, first I created a terrain page, then saved it to a file with the exporter, then I loadeded it for editing.


Ah, sounded like you were using Java serializing.  We use the binary tools at work and I have not seen any such issues, but we've written a separate terrain block for z-up terrain.  I'll have a look to see if there is something special about our z-up terrain block code.
12

I've no issue with changing terrain to not extend clod.  What do the other devs think?

13

HI renanse,



I have tried to do the same, I made the TerrainBlock extends TriMesh, instead of AreaClodMesh, and its working fine now, so the prob is from clods.  But I can't keep it that way, I don't want to chang anything from jMe side.



I noticed also that the creation time of the terrain has shrinked a little bit.



Thanks.

14

i'm not sure if clod mesh terrains are useful at all anyways :confused:

15
sfera said:

i'm not sure if clod mesh terrains are useful at all anyways :/


Definitely not, LOD is only worth it if you have a huge, very detailed terrain. Then you can use stuff like geometry clipmaps etc, more advanced mechanism but CLOD is definitely way to CPU hungry for terrain.
16

i know, i tried it all already :slight_smile:

17

i didn't look into this yet, but one thing to keep in mind is that the binary saved terrain files (jme) should not become useless because of such a change.