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https://github.com/SoftFever/OrcaSlicer.git
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2ae2672ee9
Fixing dep build script on Windows and removing some warnings. Use bundled igl by default. Not building with the dependency scripts if not explicitly stated. This way, it will stay in Fix the libigl patch to include C source files in header only mode.
73 lines
3.6 KiB
C++
73 lines
3.6 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2016 Alec Jacobson <alecjacobson@gmail.com>
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//
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// This Source Code Form is subject to the terms of the Mozilla Public License
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// v. 2.0. If a copy of the MPL was not distributed with this file, You can
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// obtain one at http://mozilla.org/MPL/2.0/.
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#include "voxel_grid.h"
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#include "grid.h"
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template <
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typename Scalar,
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typename DerivedGV,
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typename Derivedside>
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IGL_INLINE void igl::voxel_grid(
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const Eigen::AlignedBox<Scalar,3> & box,
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const int in_s,
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const int pad_count,
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Eigen::PlainObjectBase<DerivedGV> & GV,
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Eigen::PlainObjectBase<Derivedside> & side)
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{
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using namespace Eigen;
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using namespace std;
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typename DerivedGV::Index si = -1;
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box.diagonal().maxCoeff(&si);
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//DerivedGV::Index si = 0;
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//assert(si>=0);
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const Scalar s_len = box.diagonal()(si);
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assert(in_s>(pad_count*2+1) && "s should be > 2*pad_count+1");
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const Scalar s = in_s - 2*pad_count;
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side(si) = s;
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for(int i = 0;i<3;i++)
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{
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if(i!=si)
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{
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side(i) = std::ceil(s * (box.max()(i)-box.min()(i))/s_len);
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}
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}
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side.array() += 2*pad_count;
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grid(side,GV);
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// A * p/s + B = min
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// A * (1-p/s) + B = max
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// B = min - A * p/s
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// A * (1-p/s) + min - A * p/s = max
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// A * (1-p/s) - A * p/s = max-min
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// A * (1-2p/s) = max-min
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// A = (max-min)/(1-2p/s)
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const Array<Scalar,3,1> ps=
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(Scalar)(pad_count)/(side.transpose().template cast<Scalar>().array()-1.);
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const Array<Scalar,3,1> A = box.diagonal().array()/(1.0-2.*ps);
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//// This would result in an "anamorphic", but perfectly fit grid:
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//const Array<Scalar,3,1> B = box.min().array() - A.array()*ps;
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//GV.array().rowwise() *= A.transpose();
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//GV.array().rowwise() += B.transpose();
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// Instead scale by largest factor and move to match center
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typename Array<Scalar,3,1>::Index ai = -1;
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Scalar a = A.maxCoeff(&ai);
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const Array<Scalar,1,3> ratio =
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a*(side.template cast<Scalar>().array()-1.0)/(Scalar)(side(ai)-1.0);
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GV.array().rowwise() *= ratio;
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const Eigen::Matrix<Scalar,1,3> offset = (box.center().transpose()-GV.colwise().mean()).eval();
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GV.rowwise() += offset;
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}
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#ifdef IGL_STATIC_LIBRARY
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// Explicit template instantiation
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// generated by autoexplicit.sh
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template void igl::voxel_grid<float, Eigen::Matrix<float, -1, -1, 0, -1, -1>, Eigen::Matrix<int, 1, 3, 1, 1, 3> >(Eigen::AlignedBox<float, 3> const&, int, int, Eigen::PlainObjectBase<Eigen::Matrix<float, -1, -1, 0, -1, -1> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, 1, 3, 1, 1, 3> >&);
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template void igl::voxel_grid<float, Eigen::Matrix<float, -1, 3, 0, -1, 3>, Eigen::Matrix<int, 3, 1, 0, 3, 1> >(Eigen::AlignedBox<float, 3> const&, int, int, Eigen::PlainObjectBase<Eigen::Matrix<float, -1, 3, 0, -1, 3> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, 3, 1, 0, 3, 1> >&);
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template void igl::voxel_grid<float, Eigen::Matrix<float, -1, 3, 1, -1, 3>, Eigen::Matrix<int, 3, 1, 0, 3, 1> >(Eigen::AlignedBox<float, 3> const&, int, int, Eigen::PlainObjectBase<Eigen::Matrix<float, -1, 3, 1, -1, 3> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, 3, 1, 0, 3, 1> >&);
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template void igl::voxel_grid<double, Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<int, 3, 1, 0, 3, 1> >(Eigen::AlignedBox<double, 3> const&, int, int, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, 3, 1, 0, 3, 1> >&);
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template void igl::voxel_grid<double, Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<int, 1, 3, 1, 1, 3> >(Eigen::AlignedBox<double, 3> const&, int, int, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, 1, 3, 1, 1, 3> >&);
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#endif
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