* Shorten the travel between extrusion paths
chain_and_reorder_extrusion_entities() builds the print order of the infill,
ironing and support paths of a region from the nozzle position. It took the
greedy chain, which leaves its longest joins for last; it now shortens it:
- Up to eight paths, chain_segments_exact() finds the shortest chain over
every order and allowed reversal, by dynamic programming over the subsets
of paths, with a fixed start and a free end.
- Longer chains are refined by local search: 2-opt, or-opt of up to three
paths, and moving a run of any length next to the nozzle to the front, each
tried only toward the 32 end points nearest a link, which come from a
uniform grid. A move is applied only if it shortens the chain, so the result
is never longer than the greedy one.
- A nearest-next chain is built too, and refined and used instead when it is
already shorter than the refined greedy chain, which happens when the greedy
chain sweeps away from the nozzle and has to come back with a long jump.
The shared greedy chaining also chains two to four segments exactly, which
covers the islands of a layer and the loops of a perimeter collection. Paths
that cannot reverse, such as Grid's, are only reordered, and collections that
keep their order are left alone. The overload without a start point keeps the
greedy chain.
Co-authored-by: Tobias Gloth <tobias.gloth@3dsystems.com>
* Order objects and islands along shorter tours
Objects under print_order Default, and the tour of islands across objects, are
visited in the same order on every layer, so chain_points_with_postprocessing()
orders them as a closed tour. Up to ten points, tsp_exact_cycle() finds the
shortest tour by dynamic programming over subsets, starting at the point
nearest the start point when one is given. Larger sets add or-opt to the
existing 2-opt and crossing removal: runs of up to three points move next to
one of the eight points nearest an end of the run, reversed or not, and
crossing removal runs last so no crossing is left. Snake ordering is
unchanged; Best of strategies gets the shorter Default tour as a candidate.
* Join infill lines into fewer paths
Every separate infill path costs a travel to it, so the fill generators now
leave fewer of them:
- connect_infill() pairs the line ends along each wall in the order that
joins the most lines: besides shortest arc first, it replays arcs of about
the same length taken along each contour, forwards and backwards, including
the last pass that joins neighboring open ends, and keeps the order that
joins the most. Regular patterns no longer leave loose ends where the
pairs along a wall fall out of step, and multiline copies print out and back.
- Ends whose anchors would meet are joined along the wall instead, up to two
anchors and a line width apart.
- An unpaired end anchors toward the nearest open end of another path, where
the next path usually starts, instead of the side with more free wall. With
multiline infill, an anchor toward a copy of the same line stops short of
the copy instead of printing over it.
- Last, sparse infill lines whose ends are at most two line spacings apart are
joined with a straight piece, shortest first, without closing a loop or
crossing a line; with anchors off this is the only joining. Copies of
neighboring multiline groups are joined at the same side, and lines that
cannot reverse only join end to start.
* Describe the travel optimization design
How the extrusion chains, the object and island tours and the infill line joining shorten the travel, and why each part is built the way it is.
---------
Co-authored-by: Tobias Gloth <tobias.gloth@3dsystems.com>
* Remove Unused Project Includes and Forward-Declare Where a Type Is Only Referenced
Generated with include-what-you-use and applied conservatively. Only OrcaSlicer's own headers, the ones under src/ and tests/, are removed or forward-declared; standard-library and third-party includes are left alone. An include is removed only when both the Release and the Debug configuration leave it unused, never from inside a conditional block, and never from a file with platform-specific blocks, which only gain includes. Files whose only use of a header sits behind a feature or debug macro (libvgcode's OpenGL ES and marker code, the ARACHNE/TESTS_EXPORT_SVGS debug output) keep their includes.
clonable_ptr.hpp gains #pragma once; it had no include guard and was only safe while Config.hpp was its sole includer.
* Remove Unused Project Includes From Files With Platform-Specific Code
A Linux include-what-you-use run cannot see the code inside _WIN32, __APPLE__ or __linux__ blocks, so its verdict is only taken where nothing the removed header declares, directly or through what it includes, is named inside those blocks. Removals also have to hold in both the Release and Debug configuration and never touch a line inside a conditional block.
* Restore the libslic3r Precompiled Header and Direct Includes Lost in the Platform Pass
The platform-file pass treated pchheader.hpp as an ordinary header and
emptied it, and left GUI_Preview.hpp and 14 other files relying on
headers they no longer reached directly.
* Restore MainFrame.hpp in ParamsDialog.cpp for the Windows-Only Reparent Call
* Include Headers That Files Reached Through Ones the Cleanup Removed
* Drop Includes Duplicated by the Cleanup or by Main's Own Additions
* Leave PreciseSeam.cpp as Main Has It After the Precise Seam Rework
* Add Missing Includes Across src/libslic3r
Every libslic3r source and header now directly includes the headers declaring what it uses, rather than relying on the precompiled header or transitive includes. Generated with clang-tidy misc-include-cleaner, with libslic3r headers spelled libslic3r/... so they resolve outside the library's private include paths. MultiMaterialSegmentation.hpp, Support/SupportParameters.hpp and Format/STEP.hpp are made self-contained by hand.
* Make the libslic3r Headers Compile on Their Own
Each now includes, or forward-declares, what it uses instead of relying on what its includers happened to include first. Left out: I18N.hpp, which errors on purpose when included from GUI code, and VoxelizeCSGMesh.hpp and SLA/bicubic.h, which nothing includes and which no longer compile at all.
* Add the Includes Missing From the Hand-Fixed libslic3r Headers
clang-tidy would not edit these headers while they failed to compile on their own, so the first pass skipped them. With the headers now self-contained, a second pass adds the rest.
* Keep Windows Setup Ahead of the Added libslic3r Includes
Print.cpp and Thread.cpp open with a _WIN32 block that has to come first; without the precompiled header, Print.cpp otherwise reaches windows.h through OCCT with NONLS defined and boost/regex fails. OpenVDBUtils.cpp and SLA/SupportTreeBuilder.cpp had includes inside #ifndef NOMINMAX, which libslic3r defines on Windows, so those were skipped there. .clang-tidy also ignores the MSVC STL and UCRT internals, Boost.Multiprecision's fwd.hpp and CPython's Windows include directory.
* Re-Add libslic3r Includes After the Clipper2 2.0.1 Migration
Rebasing onto main took main's version of the files the Clipper2 migration rewrote, so their added includes are restored here, along with includes for main's new code. Clipper2's individual headers are now ignored by clang-tidy: they only build the Z variant through clipper2_z.hpp, which defines USINGZ first, so including clipper.core.h and the like directly broke ClipperZUtils.cpp.
SoftFever