Procedure: thm_part_slice2d_orientslice Purpose: Helper function for thm_part_slice2d. Performs transformation into user specified coordinates. This transformation is applied after the COORD and ROTATION transformation have been performed. Input: slice_z: (float) 3 vector specifying the slice's normal slice_x: (float) 3 vector to be projected into the slice plane vectors: (float) N x 3 array of velocity vectors bfield: (float) magnetic field 3-vector vbulk: (float) bulk velocity 3-vector sunvec: (float) spacecraft-sun direction 3-vector Output: If 2d or 3d interpolation are being used then this will transform the velocity vectors and support vectors into the target coordinate system. The transformation matrix will be passed out via the MATRIX keyword. Notes: $LastChangedBy: aaflores $ $LastChangedDate: 2013-12-11 12:41:36 -0800 (Wed, 11 Dec 2013) $ $LastChangedRevision: 13660 $ $URL: svn+ssh://thmsvn@ambrosia.ssl.berkeley.edu/repos/spdsoft/trunk/projects/themis/spacecraft/particles/slices/thm_part_slice2d_orientslice.pro $