Original Post
Is it possible to get a polygon to rotate according to the camera angle so that it always faces it? Almost like a sprite.
If it is, how is this done and whats the math behind it?
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Rotation
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With DX8, the answer is once again the same: matrices! :D
this matrix business is hyping me a bit... whoooo
in any case, it could be donw (I presume) using a technique not much unalike billboarding (one should keep the polygon oriented to the camera, by inverting the camera matrices in an apropriate way) - check the D3DX helper functions
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Flareman (a.k.a Ga1adaN)
Primus ante Adain
flareman@freemail.gr
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this matrix business is hyping me a bit... whoooo
in any case, it could be donw (I presume) using a technique not much unalike billboarding (one should keep the polygon oriented to the camera, by inverting the camera matrices in an apropriate way) - check the D3DX helper functions
-----------<<
Flareman (a.k.a Ga1adaN)
Primus ante Adain
flareman@freemail.gr
-----------<<
The technique you look for is called bilboarding 
Look in the DirectX sdk they have an example of it with a terrain with trees which are facing the camera.
Look in the DirectX sdk they have an example of it with a terrain with trees which are facing the camera.
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