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49 lines
1.3 KiB
49 lines
1.3 KiB
1 year ago
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#include "swept_volume.h"
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#include "swept_volume_bounding_box.h"
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#include "swept_volume_signed_distance.h"
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#include "voxel_grid.h"
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#include "marching_cubes.h"
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#include <iostream>
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IGL_INLINE void igl::swept_volume(
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const Eigen::MatrixXd & V,
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const Eigen::MatrixXi & F,
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const std::function<Eigen::Affine3d(const double t)> & transform,
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const size_t steps,
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const size_t grid_res,
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const size_t isolevel_grid,
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Eigen::MatrixXd & SV,
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Eigen::MatrixXi & SF)
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{
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using namespace std;
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using namespace Eigen;
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using namespace igl;
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const auto & Vtransform =
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[&V,&transform](const size_t vi,const double t)->RowVector3d
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{
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Vector3d Vvi = V.row(vi).transpose();
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return (transform(t)*Vvi).transpose();
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};
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AlignedBox3d Mbox;
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swept_volume_bounding_box(V.rows(),Vtransform,steps,Mbox);
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// Amount of padding: pad*h should be >= isolevel
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const int pad = isolevel_grid+1;
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// number of vertices on the largest side
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const int s = grid_res+2*pad;
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const double h = Mbox.diagonal().maxCoeff()/(double)(s-2.*pad-1.);
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const double isolevel = isolevel_grid*h;
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// create grid
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RowVector3i res;
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MatrixXd GV;
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voxel_grid(Mbox,s,pad,GV,res);
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// compute values
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VectorXd S;
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swept_volume_signed_distance(V,F,transform,steps,GV,res,h,isolevel,S);
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S.array()-=isolevel;
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marching_cubes(S,GV,res(0),res(1),res(2),0,SV,SF);
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}
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