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Fixes scars on thing walls when "avoid crossing wall" is turned on (#2659)

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* Travel very close to the inner holes, could cross external perimeter when the avoid crossing perimeters was enabled.

(cherry picked from commit prusa3d/PrusaSlicer@6c51e5148c)

* Modified variable offset in the avoid crossing perimeters to not cause scars on thin objects (#7699).

Previously, the minimum contour width was chosen too conservative and, on some thin objects, only allowed minimal (or non) offset. This could result in travels being planned along the outer perimeter.

Now, the minimum contour width is chosen much smaller at the start and tested if the variable offset wasn't failed (the outer contour broke up into more parts, more or fewer holes, etc.).
If any problem is detected, the variable offset is recalculated with a larger minimum contour width.

(cherry picked from commit prusa3d/PrusaSlicer@dc00f0bf98)

---------

Co-authored-by: Lukáš Hejl <hejl.lukas@gmail.com>
This commit is contained in:
Noisyfox 2023-11-09 22:21:44 +08:00 • committed by GitHub
parent 333287535b
commit f16feff2a4
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2 changed files with 168 additions and 102 deletions
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9
src/libslic3r/GCode/AvoidCrossingPerimeters.hpp
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@ -1,3 +1,7 @@
///|/ Copyright (c) Prusa Research 2020 - 2022 Lukáš Hejl @hejllukas, Vojtěch Bubník @bubnikv
///|/
///|/ PrusaSlicer is released under the terms of the AGPLv3 or higher
///|/
#ifndef slic3r_AvoidCrossingPerimeters_hpp_
#define slic3r_AvoidCrossingPerimeters_hpp_
@ -58,8 +62,11 @@ private:
// we enable it by default for the first travel move in print
bool m_disabled_once { true };
// Lslices offseted by half an external perimeter width. Used for detection if line or polyline is inside of any polygon.
ExPolygons m_lslices_offset;
std::vector<BoundingBox> m_lslices_offset_bboxes;
// Used for detection of line or polyline is inside of any polygon.
EdgeGrid::Grid m_grid_lslice;
EdgeGrid::Grid m_grid_lslices_offset;
// Store all needed data for travels inside object
Boundary m_internal;
// Store all needed data for travels outside object