[pdal-commits] [PDAL/PDAL] e71e35: Generalize filters.transformation to all homograph...

[Charles Karney]

  Branch: refs/heads/master
  Home:   https://github.com/PDAL/PDAL
  Commit: e71e3550a82a2f04cb764cf1343c1fd521c97c0a
      https://github.com/PDAL/PDAL/commit/e71e3550a82a2f04cb764cf1343c1fd521c97c0a
  Author: Charles Karney <charles at karney.com>
  Date:   2021-06-24 (Thu, 24 Jun 2021)

  Changed paths:
    M doc/stages/filters.transformation.rst
    M filters/TransformationFilter.cpp

  Log Message:
  -----------
  Generalize filters.transformation to all homographies. (#3467)

Include the normalizing step in filters.transformation to allow general
homographies and update the documentation.  All the examples in the
documentation are unaffected (since the last row of the matrix is
[0,0,0,1]).  Homographies allow (painfully!), perspective images of a
point cloud to be created by following the transformation filter by
writers.gdal.  This setup is not ideal, because the effective camera
matrix isn't stored with the the output image.