3DPrinting/PrusaSlicer-NonPlainar
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
21,118 Commits 1 Branch 1 Tag 249 MiB
b7740743b8
Commit Graph

281 Commits

Author SHA1 Message Date
Filip Sykala
84488ba6df Enumerate fonts 2021-09-03 12:22:44 +02:00
Filip Sykala
d45ab1c484 Fix trouble case test 2021-09-02 11:17:07 +02:00
Filip Sykala
25feacfd95 FIX Creation of non volume place in mode during simplification 2021-09-01 19:15:16 +02:00
Filip Sykala
028f04f8a1 Triangulation of polygons respects its area 
- remove its_filtration
Move Flatness out of Font
 2021-09-01 11:21:05 +02:00
Filip Sykala
026ad24b64 Convert text to mesh 2021-08-30 22:57:14 +02:00
Filip Sykala
e33c665876 Partial emboss 2021-08-30 10:51:58 +02:00
Filip Sykala
c04856e049 Extend simplify test to chack distance of each triangle center and each vertices. Both simplify to origin and vice versa 2021-08-16 18:04:38 +02:00
Filip Sykala
b90ca142a5 Merge branch 'master' into fs_QuadricEdgeCollapse 2021-08-16 11:56:56 +02:00
Vojtech Bubnik
965c2f2c55 Improved error reporting when importing various configuration files: 
1) Slic3r::RuntimeError was replaced with ConfigurationError,
   all exceptions thrown by the configuration layer are derived
   from ConfigurationError.
2) When parsing configuration files, ConfigurationError is catched and
   rethrown extended with the file name being parsed.
 2021-08-13 13:37:24 +02:00
Filip Sykala
ef5c94f90a Fix: prevent degeneration of model during simplification 2021-08-06 15:11:20 +02:00
Filip Sykala
6bcc576b5f truncate model name 2021-07-21 08:34:43 +02:00
Filip Sykala
25a4887075 QEC: When collapsing edge flip normal than check other edges in triangle 
Quadric is calculated with double precission of normal
Fix calculation of normal for changed triangles
 2021-07-19 15:46:41 +02:00
Filip Sykala
af526c54f4 Add simplification GUI 2021-07-19 09:17:50 +02:00
Filip Sykala
aca93a7ced Merge branch 'master' into fs_QuadricEdgeCollapse 2021-07-09 14:14:54 +02:00
Vojtech Bubnik
3a9857e493 Our friendly GCC does not consider std::pair<int, int> trivially 
copiable either, while everybody else does. Shame on GCC.
 2021-07-09 14:05:30 +02:00
Vojtech Bubnik
d8a0b11157 GCC does not consider std::pair<std::pair<...>, ...> to be trivially 
copiable, thus fixing the unit tests with a custom trivially
copyable type.
 2021-07-09 13:58:54 +02:00
Filip Sykala
b2238834fb Merge branch 'master' into fs_QuadricEdgeCollapse 2021-07-09 13:40:58 +02:00
Vojtech Bubnik
e4fd6a828f 1) Fixed a significant bug in MutablePriorityQueue when setting 
the indices allowing rescheduling of values in the middle of the queue.
2) Implemented a cache friendly variant - MutableSkipHeapPriorityQueue
   based on
   https://playfulprogramming.blogspot.com/2015/08/cache-optimizing-priority-queue.html
   https://github.com/rollbear/prio_queue/blob/master/prio_queue.hpp
 2021-07-09 12:53:29 +02:00
Filip Sykala
2c0b89e4a7 FIX Simplify test 2021-07-09 10:31:05 +02:00
Filip Sykala
e26bffadd8 Add throw_on_cancel and statusfn into QEC 2021-07-09 09:09:52 +02:00
Filip Sykala
35a906139e Extend test with checking simplified model distance to original model 2021-07-08 08:33:06 +02:00
Filip Sykala
ed9152d004 Merge branch 'master' into fs_QuadricEdgeCollapse 2021-07-07 16:52:10 +02:00
Vojtech Bubnik
0f3cabb5d9 Support for forward compatibility of configurations, user and system 
config bundles, project files (3MFs, AMFs). When loading these files,
the caller may decide whether to substitute some of the configuration
values the current PrusaSlicer version does not understand with
some reasonable default value, and whether to report it. If substitution
is disabled, an exception is being thrown as before this commit.
If substitution is enabled, list of substitutions is returned by the
API to be presented to the user. This allows us to introduce for example
new firmware flavor key in PrusaSlicer 2.4 while letting PrusaSlicer
2.3.2 to fall back to some default and to report it to the user.

When slicing from command line, substutions are performed by default
and reported into the console, however substitutions may be either
disabled or made silent with the new "config-compatibility" command
line option.

Substitute enums and bools only.  Allow booleans to be parsed as
    true: "1", "enabled", "on" case insensitive
    false: "0", "disabled", "off" case insensitive
This will allow us in the future for example to switch the draft_shield
boolean to an enum with the following values: "disabled" / "enabled" / "limited".

Added "enum_bitmask.hpp" - support for type safe sets of options.
See for example PresetBundle::load_configbundle(...
LoadConfigBundleAttributes flags) for an example of intended usage.

WIP: GUI for reporting the list of config substitutions needs to be
implemented by @YuSanka.
 2021-06-27 16:57:05 +02:00
Filip Sykala
7c13cfa1d9 Add test checking diference in volume before/after simplification 
FIX warnings
..\src\libslic3r\QuadricEdgeCollapse.cpp(173): warning C4056: overflow in floating-point constant arithmetic
..\src\libslic3r\QuadricEdgeCollapse.cpp(232): warning C4056: overflow in floating-point constant arithmetic
 2021-06-22 09:41:38 +02:00
Filip Sykala
e3cdeda673 Add quadric edge collapse 2021-06-22 09:21:16 +02:00
tamasmeszaros
c4507842a0 Add new (winner) neighbor index based on measurements 2021-06-08 10:34:32 +02:00
tamasmeszaros
c8be2cdceb Added measuring sandbox for neighbors index creation 2021-06-08 10:34:32 +02:00
tamasmeszaros
c542e6e14b Corrected mesh split implementation 2021-06-08 10:28:23 +02:00
tamasmeszaros
8fdb0fddc0 Get rid of Contour3D 2021-06-08 10:28:23 +02:00
tamasmeszaros
e6f97358bc Refactored hollowing backend to use indexed_triangle_mesh 2021-06-08 10:28:23 +02:00
Lukas Matena
6b6b086948 Fixed tests and windows build 2021-05-24 12:20:29 +02:00
enricoturri1966
9da87d8e0f Code cleanup 2021-05-24 10:03:48 +02:00
enricoturri1966
ca9fad002c 3rd attempt to fix unit test for 2D convex hull of sinking object on RasperryPi 2021-05-24 08:54:08 +02:00
enricoturri1966
dfa85c2c37 Another attempt to fix unit test for 2D convex hull of sinking object on RasperryPi 2021-05-21 15:37:25 +02:00
enricoturri1966
49f29e8353 Added debug output to help fixing unit test for 2D convex hull of sinking object on RasperryPi 2021-05-21 11:56:10 +02:00
enricoturri1966
90be278d98 Attempt to fix unit test for 2D convex hull of sinking object on RasperryPi 2021-05-21 10:14:13 +02:00
enricoturri1966
f0ef5e409d Added unit test for calculation of 2D convex hull of sinking object 2021-05-20 12:53:47 +02:00
Vojtech Bubnik
70b4915f9c TriangleMeshSlicer: Got rid of admesh! 2021-05-18 15:05:30 +02:00
Vojtech Bubnik
308d6b7809 WIP: Reworked slicing 
1) Slicing code moved to TriangleMeshSlicer.cpp,hpp from TriangleMesh.cpp,hpp
2) Refactored to use as little as possible of admesh.
 2021-05-17 20:25:59 +02:00
Vojtech Bubnik
52b3c655ff Fixed Polygon::centroid() 
Ported Polygon unit tests from Perl to C++.
 2021-05-07 11:42:21 +02:00
Vojtech Bubnik
f16d4953be Removing offset2 from Perl bindings and other minor cleanup. 2021-05-06 14:29:20 +02:00
Vojtech Bubnik
09a80d954c Further rework of ClipperUtils: Replaced many to_polygons() / 
to_expolygons() calls with templated ClipperUtils variants to avoid
memory allocation and copying.
 2021-05-03 11:39:53 +02:00
Vojtech Bubnik
9f4e9da5c6 Merge branch 'tm_vb_clipper_eigen' 2021-04-23 11:44:25 +02:00
Vojtech Bubnik
542d95a593 Fixing unit tests 2021-04-21 15:31:06 +02:00
Vojtech Bubnik
7112ac61b6 Replacing ClipperLib::IntPoint with Eigen point as a first step to 
make the ClipperLib paths and polygons compatible with Slic3r paths
and polygons without conversions and memory allocations.
 2021-04-14 09:22:51 +02:00
Lukáš Hejl
dd4b26ba25 Fix of 7bd412a2ca 2021-04-05 20:32:41 +02:00
Lukáš Hejl
7bd412a2ca A few test cases for Voronoi diagrams. 
A few test cases collected from multi-material segmentation. All new test cases are suppressed not to fail a building process.
 2021-04-05 16:47:00 +02:00
Vojtech Bubnik
ba5e8860cb Fixing some compilation warnings 2021-03-15 10:36:03 +01:00
Vojtech Bubnik
8e27e355c2 Fixing unit tests. 2021-03-15 09:55:56 +01:00
tamasmeszaros
33d6655f26 Clean up hollowing test 
Needs rethinking anyway
 2021-03-08 17:38:10 +01:00
tamasmeszaros
82954ba715 Group hollowing result (including grid) into one struct 2021-03-08 17:38:10 +01:00
Vojtech Bubnik
5f5de1c812 Follow-up to 5276bd98d7: 
WIP: MutablePolygon - linked list based polygon implementation
allowing rapid insertion and removal of points.
WIP: porting smooth_outward() from Cura.
 2021-03-03 15:04:26 +01:00
Vojtech Bubnik
5276bd98d7 WIP: MutablePolygon - linked list based polygon implementation 
allowing rapid insertion and removal of points.
WIP: porting smooth_outward() from Cura.
 2021-03-01 18:41:46 +01:00
Vojtech Bubnik
5449e6c549 Fixing some compiler warnings on Linux 2021-02-08 11:58:03 +01:00
Vojtech Bubnik
a116914fce WIP VoronoiOffset: Squash merge of vb_voronoi_offset 
Working contour offsetting,
skeleton_edges_rough() to detect "important" skeleton edges.
Radius of an inscribed circle along the "important" skeleton edges
changes slowly, therefore these "important" skeleton edges signify
oblong regions possibly needing a gap fill.
 2021-01-29 16:34:22 +01:00
Lukas Matena
dc4bdad84a Fixed some more GCC warnings 2021-01-29 15:17:03 +01:00
Vojtech Bubnik
aa6ddfec85 Added functions to export raw image data to PNG for debugging purposes. 
Renamed PNGRead.cpp/hpp to PNGReadWrite.cpp,hpp
EdgeGrid: Resurrected debugging output to PNG.
 2020-11-26 09:01:44 +01:00
Vojtech Bubnik
239d588c5d 1) Implemented anchoring of infill lines to perimeters with length 
limited anchors, while before a full perimeter segment was always
   taken if possible.
2) Adapted the line infills (grid, stars, triangles, cubic) to 1).
   This also solves a long standing issue of these infills producing
   anchors for each sweep direction independently, thus possibly
   overlapping and overextruding, which was quite detrimental
   in narrow areas.
3) Refactored cubic adaptive infill anchroing algorithm
   for performance and clarity.
 2020-11-05 17:32:40 +01:00
Vojtech Bubnik
3cfccf1a5a Fixed unit tests broken with 3502f256fa 2020-10-29 12:39:03 +01:00
tamasmeszaros
c10ff4f503 fixing optimizer and concurrency::reduce 2020-09-10 14:03:30 +02:00
tamasmeszaros
1560e15ed9 Add missing includes for win 2020-08-27 23:14:42 +02:00
tamasmeszaros
2bcd36d155 PNG image read with libpng 2020-08-27 23:14:42 +02:00
Vojtech Bubnik
851ebc7991 fix of previous commit, missing include 2020-06-16 14:00:25 +02:00
Vojtech Bubnik
b101a8e266 Fixes of the offset curves from Voronoi diagram. 
The offset curve extractor is already quite usable,
though singular cases are still not covered yet
when the offset curve intersects or nearly intersects
a Voronoi vertex.

Removal of the PRINTF_ZU "%zu" Visual Studio printf compatibility macro.
Fixes of a contours self intersection test for collinear segments.
SVG exporter now exports white background, so that the GNOME Eye viewer is usable.
 2020-06-16 13:15:48 +02:00
Vojtech Bubnik
1c95ceaeaa Reworked algorithm for Voronoi Offset curve extraction. 
Now the algorithm is very different from the OpenVoronoi implementation
and hopefully it is now correct (save numerical issues, which will be
a big PITA).
 2020-06-11 16:11:02 +02:00
Vojtech Bubnik
6f4d24ab95 WIP: Generating offset curves with properly rounded corners from 
a Voronoi diagram. Curve extraction is based on the OpenVoronoi implementation.
 2020-06-04 13:50:09 +02:00
Vojtech Bubnik
6f92538c20 BoundingBox support for Lines, 
BoundingBox constructor will no more throw for empty vector of points.

GMP allowed for Vojtech's fork of boost::polygon Voronoi implementation.

Added libslic3r tests for boost::polygon Voronoi. All Voronoi issues
ever reported on the Internet are captured by the tests. Two issues
reported (the two test cases) are real issues which may influence
PrusaSlicer negatively, namely

https://github.com/boostorg/polygon/issues/43
 2020-05-28 15:53:53 +02:00
Vojtech Bubnik
2b8f655020 WIP AABBIndirect: Documentation, polishing. 2020-05-22 09:29:21 +02:00
Vojtech Bubnik
eeb9590d28 WIP: own AABBTreeIndirect, builds up the tree 4x quicker than libigl. 2020-05-22 09:29:21 +02:00
tamasmeszaros
2a8c485b32 suppress unnecessary test output in release mode 2020-04-28 21:11:54 +02:00
tamasmeszaros
217477a9ff SLA archive import with miniz, marching square bugfixes 
Fix compilation on Windows


Fix array subscript out of range error in MarchingSquares


Fix normals of mesh constructed from slices


Improve performance of mesh construction from slices
 2020-04-23 19:12:07 +02:00
tamasmeszaros
247fca6d55 Initial version of sl1 import with sla::Raster refactor. 2020-04-23 19:05:32 +02:00
bubnikv
c27297f6cc 64bit coord_t 
Vec3i as a vertex index to TriangleMesh constructor
 2020-03-25 14:35:41 +01:00
tamasmeszaros
f4f236e82e Added test for libcurl https handling disabled on build server. 
Linux docker image does not expose port 80
 2020-03-06 15:18:14 +01:00
tamasmeszaros
6deb6a776d Do EFC for the first faded layers of SLA, interpolate efc parameters 
Compensated slices have negative orientation...


Move efc to common params


Fix elefant foot compensation reversed contours


Remove redundant assertions and don't apply absolute correction if zero
 2020-02-18 17:39:36 +01:00
Enrico Turri
904263d231 ENABLE_CONFIGURABLE_PATHS_EXPORT_TO_3MF_AND_AMF set as default 2020-02-13 11:25:34 +01:00
tamasmeszaros
2d86e3cc4d fix failing test due to missing cgal dlls 2020-02-05 18:22:17 +01:00
tamasmeszaros
bd76c345f2 Handle CGAL exceptions and add tests for mesh boolean operations 
Add conversion to exact predicates exact construction kernel format for consecutive booleans (experiments)
 2020-02-05 17:40:05 +01:00
bubnikv
059bdb4711 Implemented handling of complex ConfigOptionFloatOrPercent chains 
by the PlaceholderParser.

Namely, all the options with the "ratio_over" reference are now handled
correctly by the PlaceholderParser with the exception
of the "first_layer_extrusion_width", which overrides speed of extrusions
by their respective extrusion type.

Also the various extrusion widths (extrusion_width, first_layer_extrusion_width,
external_perimeter_extrusion_width etc.) produce the same numbers
as if ran through the back-end, with the assumption of not overriding
layer height by the variable layer height editing tool or layer height
modifiers.
 2020-02-04 15:27:38 +01:00
tamasmeszaros
0c4797e92e use vsnprintf instead of snprintf in string_printf function 
Also, revert to old location: Utils.hpp and utils.cpp
 2020-02-03 16:00:53 +01:00
tamasmeszaros
b45e95877e Merge branch 'master' into lm_tm_hollowing 2020-01-23 17:43:18 +01:00
tamasmeszaros
f8a5796ca5 add mesh simplification. 
SPE-1072 
Working but flipped normals with the interior.
Testing on treefrog passed
Oversampling for hollowed mesh should not be less than 3x
Flip back normals after simplify and remove redundant test code.
 2020-01-23 10:58:18 +01:00
bubnikv
094cef26d4 Fix of the new PlaceholderParser int() conversion. 
Fixes https://github.com/prusa3d/PrusaSlicer/pull/3271
Also some old errors (typos, UBs) were fixed.
 2020-01-21 17:12:06 +01:00
Lukas Matena
63b0eec5a9 Merge branch 'master' into lm_tm_hollowing 2020-01-21 13:00:07 +01:00
bubnikv
05ea01bdcc Ported PlaceholderParser unit tests to C++. 2020-01-21 12:10:09 +01:00
tamasmeszaros
858e936e52 Fix incorrect filename case in test_3mf 2020-01-21 11:10:34 +01:00
tamasmeszaros
6cfad6848f Fix incorrect filename case in test_3mf 2020-01-20 11:20:18 +01:00
Enrico Turri
abd432e7a8 Configurable paths export (fullpath or not) to 3mf and amf 2020-01-08 11:11:38 +01:00
Lukas Matena
0551411c48 Merge branch 'master' into lm_tm_hollowing 2020-01-06 12:41:29 +01:00
Enrico Turri
8fd753ab27 Follow-up of c790e2ff7c -> Fixed include 2020-01-06 12:31:35 +01:00
Enrico Turri
c790e2ff7c Added unit test for checking geometry after save+load to 3mf cycle 2020-01-06 12:10:57 +01:00
Lukas Matena
b3f15b1c98 Merge branch 'master' into lm_tm_hollowing 2019-12-20 10:33:53 +01:00
tamasmeszaros
42ffc4e3c5 Fix polytree traversal. 
Put back old traverse_pt and union_pt_chained
 2019-12-19 11:27:19 +01:00
Lukas Matena
537260494d Merge branch 'master' into lm_tm_hollowing 2019-12-12 11:37:33 +01:00
tamasmeszaros
5be66a52c0 add drain hole 3mf export and import 2019-12-06 15:47:58 +01:00
bubnikv
4cff569b62 Improvements of infill path planning: 
Implementation of 2-opt pairwise exchange iterative improvement
algorithm with an extension to a chain of segments, where
the chain of segments may get flipped during the exchange operation.
The 2-opt exchange algorithm may be quite slow.
 2019-11-22 15:33:20 +01:00
tamasmeszaros
7011c58faa Merge branch 'master' into lm_tm_hollowing 2019-11-18 17:50:56 +01:00
bubnikv
fe4b65e305 Improvement of the Elephant foot compensation: 
Using a positive curvature estimate to control the strength
of the Elephant foot compensation shall work similarly to
the previous implementation while avoiding pinching off
tiny pieces from the contour.
 2019-11-15 16:20:01 +01:00
bubnikv
dd59945098 Fix of a typo in KDTreeIndirect. 
Improvement of the infill path planning.
Regression fix of Gyroid infill crashes.
Some unit tests for elephant foot and path planning.
 2019-11-14 17:02:32 +01:00
tamasmeszaros
4e067c42f0 SLAPrint steps moved to separate module. 
* Lambdas replaced with class methods
 2019-11-12 16:54:59 +01:00
tamasmeszaros
c22423a219 Merge branch 'tm_openvdb_integration' into lm_tm_hollowing 
* Refactor file names in SLA dir
 2019-11-11 12:55:22 +01:00
tamasmeszaros
4b08865809 hollowing params renamed, filtering generalized 2019-11-08 09:21:30 +01:00
tamasmeszaros
a82f1268f3 Hollowed interior is now visible in preview 2019-11-06 14:26:15 +01:00
tamasmeszaros
bdf6f7342e Hollowing step in SLAPrint process, PrintConfig params added. 2019-11-06 13:38:43 +01:00
tamasmeszaros
f913be2d93 Streamlined hollowing method. 2019-11-05 17:02:14 +01:00
tamasmeszaros
4d8631fef6 Merge branch 'tm_openvdb_integration' into lm_tm_hollowing 2019-11-05 14:48:44 +01:00
tamasmeszaros
07fb9f6559 Add oversampling and gaussian filter to hollowing. 
* Additional steps hollowing and drilling in SPAPrint
* Remove SLABoilerPlate.hpp as it was empty.
 2019-11-05 14:48:00 +01:00
Lukas Matena
eaf815ca4b Merge branch 'lm_hollow_gizmo' into lm_tm_hollowing 2019-11-05 14:41:06 +01:00
Lukas Matena
7542580ac1 Merge branch 'tm_openvdb_integration' into lm_hollow_gizmo 2019-11-05 11:16:51 +01:00
bubnikv
b295bc22db Adaptive elephant foot compensation: Improvement of the variable 
offset regularization.
 2019-11-05 10:45:14 +01:00
tamasmeszaros
d9d11e5686 Add additional parameters to openvdbutils 2019-11-05 09:43:42 +01:00
tamasmeszaros
7808d09d06 SLA Contour3D expanded with conversions supporting quads. 2019-11-04 14:33:29 +01:00
bubnikv
c4a74fdfc5 Fix of previous commit. 2019-11-01 20:05:40 +01:00
bubnikv
db97610821 Merge branch 'master' of https://github.com/Prusa3d/PrusaSlicer 2019-11-01 19:59:22 +01:00
bubnikv
a72ac57fab adaptive elpehant foot compensation, fixing 
GH issues #1757 #2085 #2132 #2423 #2502 #2156 #2773 #2828 #2998 #3001
 2019-11-01 19:59:09 +01:00
tamasmeszaros
a8a5a884f9 Add OpenVDBUtils into libslic3r, hollwing tests in libslic3r_test 2019-11-01 15:31:26 +01:00
tamasmeszaros
b928cca54c Useful verbose test output on console with Catch2 2019-10-30 10:48:47 +01:00
tamasmeszaros
6f8ce12287 Useful verbose test output on console with Catch2 2019-10-29 13:36:39 +01:00
bubnikv
9e8ce66f70 Fix / improvement of unit tests. 2019-10-25 19:06:40 +02:00
bubnikv
2e7e95adae Disabled broken tests, ported some more tests to C++, 
removed Perl tests that were already ported to C++.
 2019-10-25 18:23:42 +02:00
bubnikv
f8dc74374c Ported various clipper unit tests from Perl to C++, 
the clipper Perl unit tests were removed.
 2019-10-25 17:07:55 +02:00
bubnikv
4ae0f3a61c Merge branch 'master' of https://github.com/Prusa3d/PrusaSlicer 2019-10-25 13:34:55 +02:00
bubnikv
5e8572a196 New functions for variable offsets of polygons / expolygons. 
Test cases for the above.
Improvements of older test cases.
 2019-10-25 13:34:37 +02:00
tamasmeszaros
45d80aba63 Add catch2 extra args option to tests. 
update example
 2019-10-25 10:42:21 +02:00
bubnikv
6e6b137151 Test of importing non-standard ASCII STL (broken normals, junk 
after the ending tags)
 2019-10-18 14:42:03 +02:00
bubnikv
070070edba Initial tests for import of ASCII STLs with varying line endings. 2019-10-18 13:05:22 +02:00
bubnikv
13cc74ef0a Ported test_config.cpp from upstream Slic3r. 
Extended ConfigBase with set() functions similar to the upstream Slic3r.
ConfigBase::set_deserialize() newly throws if the operation fails.
Extrusion width parameters are newly tested for negative values.
 2019-10-18 11:53:19 +02:00
bubnikv
a5eb4a4ce1 Ported test_print/test_printobject/test_3mf from upstream Slic3r, thanks @lordofhyphens 2019-10-16 13:20:09 +02:00
bubnikv
90d5712091 Filling in the autos in the tests so it is readible and it compiles on OSX 2019-10-16 09:28:27 +02:00
bubnikv
abe856f9fe Ported remove_collinear(Polygon) and test_polygon from upstream slic3r. 2019-10-15 18:08:32 +02:00
bubnikv
42a858b999 Added test projects for libslic3r and fff_print. 
Added test_geometry.cpp from upstream slic3r, thanks @lordofhyphens
Added circle_taubin_newton() for circle center calculation, thanks @lordofhyphens
 2019-10-15 09:40:40 +02:00