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The Issue
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For a long time now MinGW has been unsupported and unmaintained and at this point,
it looks like something that we should just leave behind and move on.
Why Remove
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One of the big motivations for MinGW back in the day is that it was free compared to MSVC which was licensed based.
However, now that this is no longer true we have basically stopped updating the need CMake files.
Along with the CMake files, there are several patches to the extern libs needed to make this work. For example, see:
https://developer.blender.org/diffusion/B/browse/master/extern/carve/patches/mingw_w64.patch
If we wanted to keep MinGW then we would need to make more custom patches to the external libs and
this is not something our platform maintainers are willing to do.
For example, here is the patches needed to build python: https://github.com/Alexpux/MINGW-packages/tree/master/mingw-w64-python3
Fixes T51301
Differential Revision: https://developer.blender.org/D2648
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SCons is currently broken on my laptop, so can't test if it works for sure,
so please do tests of that.
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In the future i'd rather have this reported to an
upstream instead of adding local changes. It's really
easy to override this changes if patchset is not added
and this is to be fixed in upstream. Also the function
was never used so it was rather totally harmless warning
for us.
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Based on D420
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This re-applied patch from 25cbd13 which was lost at some point
since missing patchset in series.
This revision is to be back-ported to the final release.
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In fact we had this change a while ago, not sue what happened.
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Also added a patchset for Carve's memory leak fix.
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This commit implements dissolving of edges which were used
to triangulate non-flat faces. This slows things down a bit
(around 5% on heave mesh with all faces triangulated).
We could improve speed of dissolve a bit here (so not a bell
to add an option for triangulation yet).
Also fixed wrong edge origindex mapping.
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Goal of this commit is to support NGons for boolean modifier
(currently mesh is being tessellated before performing boolean
operation) and also solve the limitation of loosing edge custom
data layers after boolean operation is performed.
Main idea is to make it so boolean modifier uses Carve library
directly via it's C-API, avoiding BSP intermediate level which
was doubling amount of memory needed for the operation and which
also used quite reasonable amount of overhead time.
Perhaps memory usage and CPU usage are the same after all the
features are implemented but we've got support now:
- ORIGINDEX for all the geometry
- Interpolation of edge custom data (seams, crease)
- NGons support
Triangulation rule is changed now as well, so now non-flat
polygons are not being merged back after Carve work. This is
so because it's not so trivial to support for NGons and
having different behavior for quads and NGons is even more
creepy.
Reviewers: lukastoenne, campbellbarton
Differential Revision: https://developer.blender.org/D274
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Fixes some issues with NaN vertices in special cases.
Also adds edge interpolation routines which are currently
unused but which are requires to implement edge CD interpolation.
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Based on the patch from Joerg Sonnenberger.
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Based on the patch from Marcus von Appen, thanks!
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- random.hpp was only removed from actual include
directory, but not from patches/files.
- Files list generator didn't ignore config.h file
which in fact is not needed.
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Perhaps some warnings could be silenced, but not in mood of writing
local patches at this moment. They're all harmless anyway.
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reported: http://code.google.com/p/carve/issues/detail?id=33
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slight modifications.
Thanks!
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issues with clang
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==================================
Merging Carve library integration project into the trunk.
This commit switches Boolean modifier to another library which handles
mesh boolean operations in much stable and faster way, resolving old
well-known limitations of intern boolop library.
Carve is integrating as alternative interface for boolop library and
which makes it totally transparent for blender sources to switch between
old-fashioned boolop and new Carve backends.
Detailed changes in this commit:
- Integrated needed subset of Carve library sources into extern/
Added script for re-bundling it (currently works only if repo
was cloned by git-svn).
- Added BOP_CarveInterface for boolop library which can be used by
Boolean modifier.
- Carve backend is enabled by default, can be disabled by WITH_BF_CARVE
SCons option and WITH_CARVE CMake option.
- If Boost library is found in build environment it'll be used for
unordered collections. If Boost isn't found, it'll fallback to TR1
implementation for GCC compilers. Boost is obligatory if MSVC is used.
Tested on Linux 64bit and Windows 7 64bit.
NOTE: behavior of flat objects was changed. E.g. Plane-Sphere now gives
plane with circle hole, not plane with semisphere. Don't think
it's really issue because it's not actually defined behavior in
such situations and both of ways might be useful. Since it's
only known "regression" think it's OK to deal with it.
Details are there http://wiki.blender.org/index.php/User:Nazg-gul/CarveBooleans
Special thanks to:
- Ken Hughes: author of original carve integration patch.
- Campbell Barton: help in project development, review tests.
- Tobias Sargeant: author of Carve library, help in resolving some
merge stoppers, bug fixing.
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