.. _ray_transfer_mask:

Axisymmetrical (toroidal) regular grid
======================================

This example shows how to:

 * calculate ray transfer matrix (geometry matrix) for axisymmetrical cylindrical emitter defined on a regular grid,
 * filter out extra grid cells by applying a mask.


.. literalinclude:: ../../../../demos/ray_transfer/3_ray_transfer_mask.py

.. figure:: ray_transfer_mask_demo.gif
   :align: center
   :width: 450px

   **Caption:** The result of collapsing geometry matrix with 30 different emission profiles.