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Matrix calculation


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#1 Juan Camilo Acosta Arango   Members   -  Reputation: 152

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Posted 14 October 2011 - 08:55 AM

I know that the computedRotationMatix is calculated multiplying PreRotation * Rotation * PostRotation;

computedRotationMatix = PreRotation * Rotation * PostRotation;

But currently i only knows the computedRotationMatix , PreRotation , PostRotation;

How can i find the Rotation matrix?

Thanks for your time

Juan Camilo Acosta Arango

Bogotá, Colombia


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#2 SiCrane   Moderators   -  Reputation: 9850

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Posted 14 October 2011 - 09:01 AM

Provided that PreRotation and PostRotation are invertible,

Rotation = PreRotation-1 * computedRotationMatrix * PostRotation-1

#3 Álvaro   Crossbones+   -  Reputation: 14877

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Posted 14 October 2011 - 11:17 AM

And provided they are rotations, you can transpose them instead of finding their inverses, since the results should match.




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