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67 lines
2.2 KiB
67 lines
2.2 KiB
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2020 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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#ifndef IGL_TETRAHEDRALIZED_GRID_H
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#define IGL_TETRAHEDRALIZED_GRID_H
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#include "igl_inline.h"
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#include <Eigen/Core>
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namespace igl
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{
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enum TetrahedralizedGripType
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{
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TETRAHEDRALIZED_GRID_TYPE_5 = 0,
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TETRAHEDRALIZED_GRID_TYPE_6_ROTATIONAL = 1,
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NUM_TETRAHEDRALIZED_GRID_TYPE = 2
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};
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// Construct vertices of a regular grid, suitable for input to
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// `igl::marching_tets`
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//
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// Inputs:
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// nx number of grid vertices in x direction
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// ny number of grid vertices in y direction
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// nz number of grid vertices in z direction
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// type type of tetrahedralization of cube to use
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// Outputs:
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// GV nx*ny*nz by 3 list of grid vertex positions
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// GT (nx-1)*(ny-1)*(nz-1)*k by 4 list of tetrahedron indices into rows of
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// V, where k is the number of tets per cube (dependent on type)
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//
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// See also: triangulated_grid, quad_grid
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template <
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typename DerivedGV,
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typename DerivedGT>
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IGL_INLINE void tetrahedralized_grid(
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const int nx,
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const int ny,
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const int nz,
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const TetrahedralizedGripType type,
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Eigen::PlainObjectBase<DerivedGV> & GV,
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Eigen::PlainObjectBase<DerivedGT> & GT);
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//
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// Inputs:
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// GV nx*ny*nz by 3 list of grid vertex positions
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// side 3-long list {nx,ny,nz} see above
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// type type of tetrahedralization of cube to use
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// Outputs:
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// GT (nx-1)*(ny-1)*(nz-1)*k by 4 list of tetrahedron indices into rows of
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// V, where k is the number of tets per cube (dependent on type)
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//
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template <
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typename DerivedGV,
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typename Derivedside,
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typename DerivedGT>
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IGL_INLINE void tetrahedralized_grid(
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const Eigen::MatrixBase<DerivedGV> & GV,
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const Eigen::MatrixBase<Derivedside> & side,
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const TetrahedralizedGripType type,
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Eigen::PlainObjectBase<DerivedGT> & GT);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "tetrahedralized_grid.cpp"
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#endif
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#endif
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