[vtkusers] rotation of vtkActor through a matrix

[Gomez Herrero, Alberto]

Hi all,

is there any way of applying a transformation to a vtkActor using a 4x4 matrix? The pokeMatrix() method does not work as I expected. If I do

actor->pokeMatrix(transformationMatrix)

and nothing else, the position is set to (0,0,0). If I do

actor->pokeMatrix(transformationMatrix)
actor->SetPosition(position)

and then I print the matrix with

std::cout << *(actor->GetMatrix()) << std::endl;

then the 4th column of the matrix, which is supposed to be the position given with SetPosition, is not that.

If there is not any method for appliying a matrix, could anyone give me some light on how to pass from a matrix to angles around x, y and z so I can use the RotateX, RotateY and RotateZ methods?

Thank you very much,

Alberto

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