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86 lines
3.0 KiB
86 lines
3.0 KiB
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2015 Qingnan Zhou <qnzhou@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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//
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#ifndef IGL_COPYLEFT_CGAL_EXTRACT_CELLS_H
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#define IGL_COPYLEFT_CGAL_EXTRACT_CELLS_H
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#include "../../igl_inline.h"
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#include <Eigen/Core>
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#include <vector>
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namespace igl {
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namespace copyleft
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{
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namespace cgal
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{
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// Extract connected 3D space partitioned by mesh (V, F).
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//
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// Inputs:
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// V #V by 3 array of vertices.
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// F #F by 3 array of faces.
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//
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// Output:
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// cells #F by 2 array of cell indices. cells(i,0) represents the
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// cell index on the positive side of face i, and cells(i,1)
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// represents cell index of the negqtive side.
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// By convension cell with index 0 is the infinite cell.
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// Returns the number of cells
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template<
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typename DerivedV,
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typename DerivedF,
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typename DerivedC >
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IGL_INLINE size_t extract_cells(
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const Eigen::PlainObjectBase<DerivedV>& V,
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const Eigen::PlainObjectBase<DerivedF>& F,
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Eigen::PlainObjectBase<DerivedC>& cells);
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// Extract connected 3D space partitioned by mesh (V, F).
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//
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// Inputs:
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// V #V by 3 array of vertices.
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// F #F by 3 array of faces.
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// P #F list of patch indices.
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// E #E by 2 array of vertex indices, one edge per row.
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// uE #uE by 2 list of vertex_indices, represents undirected edges.
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// EMAP #F*3 list of indices into uE.
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// uEC #uE+1 list of cumsums of directed edges sharing each unique edge
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// uEE #E list of indices into E (see `igl::unique_edge_map`)
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//
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// Output:
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// cells #P by 2 array of cell indices. cells(i,0) represents the
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// cell index on the positive side of patch i, and cells(i,1)
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// represents cell index of the negqtive side.
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// By convension cell with index 0 is the infinite cell.
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template<
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typename DerivedV,
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typename DerivedF,
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typename DerivedP,
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typename DerivedE,
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typename DeriveduE,
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typename DerivedEMAP,
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typename DeriveduEC,
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typename DeriveduEE,
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typename DerivedC >
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IGL_INLINE size_t extract_cells(
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const Eigen::PlainObjectBase<DerivedV>& V,
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const Eigen::PlainObjectBase<DerivedF>& F,
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const Eigen::PlainObjectBase<DerivedP>& P,
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const Eigen::PlainObjectBase<DerivedE>& E,
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const Eigen::PlainObjectBase<DeriveduE>& uE,
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const Eigen::PlainObjectBase<DerivedEMAP>& EMAP,
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const Eigen::PlainObjectBase<DeriveduEC>& uEC,
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const Eigen::PlainObjectBase<DeriveduEE>& uEE,
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Eigen::PlainObjectBase<DerivedC>& cells);
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}
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}
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "extract_cells.cpp"
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#endif
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#endif
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