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Binormals and tangents


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#1 greenzone   Members   -  Reputation: 672

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Posted 08 July 2012 - 10:28 AM

I am trying to do bump mapping. I have the normals of the geometry and i know that the binormal is the crossProduct of the nomral and the tangent. but how do i find the tangent. I mean i know that the tangent is in relation of the S and T of the texture but im just not understanding how this all comes together. I guess my question is how do i find the tangent in order to do bump mapping on a object more complex then a cube or a plan? thanks
J-GREEN

Greenpanoply

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#2 Krohm   Crossbones+   -  Reputation: 3167

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Posted 09 July 2012 - 01:11 AM

I guess you're looking for Computing Tangent Space Basis Vectors for an Arbitrary Mesh.
Additionally, the AssImp library includes this functionality.

#3 greenzone   Members   -  Reputation: 672

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Posted 09 July 2012 - 12:55 PM

thanks I am using assimp to import and i did not know that. thanks i already found the functionality.
J-GREEN

Greenpanoply




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