[Chimera-users] Feature Request: Expose rotation to python

[Charlie Moad]

Then would this be a practical solution:

matrices.xform_matrix(chimera.openModels.list()[0].openState.xform)

On 11/28/05, Thomas Goddard <goddard at cgl.ucsf.edu> wrote:
> Hi Charlie,
>
>   I second your request for having a Xform.getMatrix() method that
> provides 3x4 Numeric array or tuple of tuples.
>
>   I use this a good bit.  My solution is to use the Chimera
> PDBmatrices.matrices module which deals with 3x4 matrices where the
> first 3 columns are the rotation and the last column is the
> translation.  It's been in Chimera for the last couple years
> (with ocassional changes).
>
>   Look at Python code
>
>         chimera/share/PDBmatrices/matrices.py
>
> to see what is there.
>
>
>   Example,
>
>    >>> xf = chimera.Xform.zRotation(30)
>    >>> from PDBmatrices import matrices
>    >>> m = matrices.xform_matrix(xf)
>    >>> print m
>    ((0.866025, -0.5, 0.0, 0.0),
>     (0.5, 0.866025, 0.0, 0.0),
>     (0.0, 0.0, 1.0, 0.0))
>
> There is a chimera_xform() routine to go from matrix to Xform, and
> other routines to apply 3x4 matrices to points, or vectors, invert matrices,
> multiply matrices, ....
>
>         Tom
>
>
>