Terrain Normals

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AramusM

Hmm, i think you can only calculate it from the surrounding 4 points if your tri setup is as below

A--B--C
| / | \ |
D--E--F
| \ | / |
G--H--I

Then you calculate the normal for BEF, BDE, DEH and EFH. add the four normals vectors together and normalize.

If its

A--B--C
| / | / |
D--E--F
| / | / |
G--H--I

You will have to get the normals for DBE, BCE, ECF, DEH, GEH and EFH. Add the 6 normals together and normalize. I think thats whats needed(Cant be sure its been a while)