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Binormal+Tangent for Bumpmapping

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Hi Can anyone tell me how to calculate the binormal and tangent in tangent space that are needed for bumpmapping? Pretty much every bumpmapping sample i found used some special formulas ( like some sin/cos stuff in a sphere ) to calculate it. Thanks alot

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ARGH i knew that tutorial but I didnt read the Addendum lol! Thanks alot for pointing it out )

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