[pdal-commits] [PDAL/PDAL] 71d96c: Provide for normal flipping

[GitHub]

  Branch: refs/heads/issue/1638-normal-flip
  Home:   https://github.com/PDAL/PDAL
  Commit: 71d96c9ca1a2c04cfc56202785d6d66b296c6685
      https://github.com/PDAL/PDAL/commit/71d96c9ca1a2c04cfc56202785d6d66b296c6685
  Author: Bradley J Chambers <brad.chambers at gmail.com>
  Date:   2017-08-03 (Thu, 03 Aug 2017)

  Changed paths:
    M filters/NormalFilter.cpp
    M filters/NormalFilter.hpp

  Log Message:
  -----------
  Provide for normal flipping

User can always set a preferred viewpoint by providing X, Y, and Z coordinates.
If a viewpoint coordinate is not provided, it will be replaced as follows.

* X and Y will default to the midpoint of the X/Y extents
* Z will default to the maximum Z plus 1000

Normals are flipped when the dot product of the normal and the vector between
the current point and the viewpoint is less than zero.