[vtkusers] Relative Rotation with VTK Transform

[Lonni Besançon]

Yes the "rotation" give a relative change from the previous position.

Well I tried what you suggested, but it does not seem to work better.
Actually the bunny does not rotate at all in this case.

Here is the code I used:
/t->SetMatrix(actor->GetMatrix());  
tInverse->SetMatrix(actor->GetMatrix()); 
tL->Inverse();
tRotationToApply->Identity();
tRotationToApply->RotateWXYZ(angle*180.0/3.14,axis[0],axis[1],axis[2]);
t->PostMultiply();
t->Concatenate(tRotationToApply) ;
t->Contatenate(tL);
actor->SetUserMatrix(t->GetMatrix());/

Also, changing the PostMultiply() to PreMultiply did not change the result
at all. The bunny gets back to its original position (unless I make a really
quick tablet tilt, you don't even see it move).



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