Gabriel Wicke 2fb60a40b2 Path: Area fixes and robustness tweaks ...

- Bug fix: Fix crasher in discretize() when the edge to discretize is
  not a 3d curve, and a nullptr is returned when trying to access the
  underlying curve. This change essentially removes an older work-around
  for QuasiUniformDeflection, which is no longer needed since we are
  using UniformDeflection. This change is tested with the original test
  case from https://forum.freecadweb.org/viewtopic.php?f=15&t=42628, as
  well as my own crasher test case.
- WireJoiner robustness: Support passing in a tolerance into
  WireJoiner::findCloseWires(), and initialize this to
  AreaParameter.Tolerance. In testing, this significantly improves the
  ability to join projected areas in complex 3d surface path models.
- Area::project() robustness: Pass the work plane down into the
  projection area instance, so that it does not need to be derived from
  shapes. This avoids crashing out on "shapes are not coplanar" from
  getPlane, when lenient processing was requested via the Coplanar
  parameter.

2020-06-07 20:09:55 -07:00

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