This was introduced in the new geodesic distances algorithm for proportional
editing. When all faces of an edge are hidden, that edge should be considered
as loose geometry.
Initial patch by Pablo with modifications by Brecht.
Differential Revision: https://developer.blender.org/D10488
While Boolean is not guaranteed to work if the operands are not
volume-enclosing (technically: PWN - piecewise constant winding number),
it needs to do something in those cases. This change makes
more cases meet user expectations in T84493, T64544, T83403,
T82642 (though very slow on that one).
The original new boolean code used "generalized winding number"
for this fallback; replaced this with code that uses raycasting.
Raycasting would have been faster, but for unfortunately also
switchd to per-triangle tests rather than per-patch tests since
it is possible (e.g., with Suzanne) to have patches that are
both inside and outside the other shape. That can make it much
slower in some cases, sadly.
The previous fix to the width modes Percent and Absolute did
not take into account that with limit mode Weight, the amount
needs to be scaled by the bevel weight of the beveled edge in
question. (Sometimes there are two beveled edges in question,
in which case an average is used.)
This makes the exact boolean have zero weights for any vertex groups
on any newly created vertices, which is what the fast solver does.
The exact boolean solver was interpolating vertex data when interpolating
loop data in newly created faces. Not sure why I chose that. The Fast
boolean solver doesn't do that, so I stopped doing it too.
These comments are used to generate Py API docs.
Most of the comments are just copies of the mesh operator counterparts.
More improvements can be made here in the future.
Thanks to Jon Denning on twitter:
https://twitter.com/gfxcoder/status/1334178566993555459
The existing hash function didn't work well with Set's method of
masking to the lower bits, because many verts have zeros in the
lower bits.
Also, replaced VectorSet with Set for Vert deduping.
Needed a better normal to for plane to offset into when there are
non in-plane edges between two beveled edges. It was using the vertex
normal, which is just wrong.
Differential Revision: https://developer.blender.org/D9508
The skin modifier did not output consistent results, causing failure to find
corresponding vertices across frames.
Remove unnecessary use of GSet, all we need is an array.
The code was trying to ignore hidden geometry when doing boolean,
which is correct when used as a tool, but not when a modifier.
Added a "keep_hidden" argument to bmesh_boolean to distinguish the
two cases.
Also fixed a bug when the tool is used with hidden geometry that
is attached to unhidden geometry that is deleted by the operation.
The code was trying to ignore hidden geometry when doing boolean,
which is correct when used as a tool, but not when a modifier.
Added a "keep_hidden" argument to bmesh_boolean to distinguish the
two cases.
Also fixed a bug when the tool is used with hidden geometry that
is attached to unhidden geometry that is deleted by the operation.
