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Surface Normal to Matrix

by Demolishun · in Technical Issues · 10/03/2006 (8:07 pm) · 1 replies

I need to build a matrix that is based upon a surface normal so I can convert a world vector to a vector relative to the surface normal. What I do not understand is what a normal represents. Is this something I can just plug into the matrix in a row or column or does it represent a euler angle, axis angle, etc?

Thanks,
Frank
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    Torque Owner Demolishun
    DemolishunConsulting Rocks!
    #1
    10/07/2006 (11:03 pm)
    Got it:
    assume vector A and normal N
    'X' is cross product
    solve for vector B which is rotated 180 deg around N z axis

    R = A X N
    B = R X A

    Sometimes it is just so simple.