Bump-mapping a landscape with shader

[nomadsoul]

  hi,

I have made a splat-shader with bump-mapping which work great on mesh. When i apply it on landscape the bump effect appear and dissapear each frame or when i move the camera ! Every one can tell me why please ?

[jviper]

I think the vertices in the TVLandscape still do not have tangents and binormals (or bitangents, which ever one it is). And with TVLandscape you cannot add these like you can with TVMesh (because you cannot change the vertex format in TVLandscape). Therefore you have to generate them manually in the shader. Cross product the normal of the vertex with an arbitrary vector (I think we used (0,1,0) ). Then cross product that new vector with the normal and get a third, and there you have faked a vertex with binormals and tangents.

I think somewhere in the community is a version of a shader for TVLandscape, which does those things.

[nomadsoul]

ok, not find any shader for landscape for the moment, i am not enought good to do what you say...

[jviper]

I thought I has a sample with landscape bumpmapping. I can't seem to find any of them now.