Hi you all,


I'm wondering how to map the content of GL_MODELVIEW_MATRIX
correctly to an Eigen::Affine3d transformation.

I know that both have column-order storage order, but I don't know how to pick the current GL_MODELVIEW_MATRIX and write a deep copy to Affine3d.

Code: Select all

Affine3d M;
glGetDoublev(GL_MODELVIEW_MATRIX,M.data());


should do the trick but data() is a const member function, so it's not possibile to write onto, and obviously this is not a deep copy.

oh, there is no non const version of .data() in Transform<>, you can workaround using:

M.matrix().data()

I'm I ensured that by using transform.matrix.data() the storage order is the same?

yes, it is column major like OpenGL.