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Add minimum bounding box rotation as starting point

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tamasmeszaros 2020-11-20 09:28:09 +01:00
parent d5bdaceff2
commit e17e6b4d0e
1 changed files with 14 additions and 0 deletions
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14
src/libslic3r/Arrange.cpp
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@ -7,6 +7,7 @@
#include <libnest2d/optimizers/nlopt/subplex.hpp>
#include <libnest2d/placers/nfpplacer.hpp>
#include <libnest2d/selections/firstfit.hpp>
#include <libnest2d/utils/rotcalipers.hpp>
#include <numeric>
#include <ClipperUtils.hpp>
@ -449,6 +450,12 @@ template<class Bin> void remove_large_items(std::vector<Item> &items, Bin &&bin)
++it : it = items.erase(it);
}
template<class S> Radians min_area_boundingbox_rotation(const S &sh)
{
return minAreaBoundingBox<S, TCompute<S>, boost::rational<LargeInt>>(sh)
.angleToX();
}
template<class BinT> // Arrange for arbitrary bin type
void _arrange(
std::vector<Item> & shapes,
@ -483,6 +490,13 @@ void _arrange(
for (auto &itm : shapes ) inp.emplace_back(itm);
for (auto &itm : excludes) inp.emplace_back(itm);
// Use the minimum bounding box rotation as a starting point.
// TODO: This only works for convex hull. If we ever switch to concave
// polygon nesting, a convex hull needs to be calculated.
if (params.allow_rotations)
for (auto &itm : shapes)
itm.rotation(min_area_boundingbox_rotation(itm.rawShape()));
arranger(inp.begin(), inp.end());
for (Item &itm : inp) itm.inflate(-infl);
}