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82 lines
2.5 KiB
C++
82 lines
2.5 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2013 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_UPSAMPLE_H
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#define IGL_UPSAMPLE_H
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#include "igl_inline.h"
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#include <Eigen/Core>
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#include <Eigen/Sparse>
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// History:
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// changed templates from generic matrices to PlainObjectBase Alec May 7, 2011
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namespace igl
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{
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// Subdivide without moving vertices: Given the triangle mesh [V, F],
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// where n_verts = V.rows(), computes newV and a sparse matrix S s.t.
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// [newV, newF] is the subdivided mesh where newV = S*V.
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//
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// Inputs:
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// n_verts an integer (number of mesh vertices)
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// F an m by 3 matrix of integers of triangle faces
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// Outputs:
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// S a sparse matrix (will become the subdivision matrix)
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// newF a matrix containing the new faces
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template <
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typename DerivedF,
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typename SType,
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typename DerivedNF>
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IGL_INLINE void upsample(
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const int n_verts,
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const Eigen::PlainObjectBase<DerivedF>& F,
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Eigen::SparseMatrix<SType>& S,
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Eigen::PlainObjectBase<DerivedNF>& NF);
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// Subdivide a mesh without moving vertices: loop subdivision but odd
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// vertices stay put and even vertices are just edge midpoints
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//
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// Templates:
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// MatV matrix for vertex positions, e.g. MatrixXd
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// MatF matrix for vertex positions, e.g. MatrixXi
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// Inputs:
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// V #V by dim mesh vertices
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// F #F by 3 mesh triangles
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// Outputs:
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// NV new vertex positions, V is guaranteed to be at top
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// NF new list of face indices
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//
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// NOTE: V should not be the same as NV,
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// NOTE: F should not be the same as NF, use other proto
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//
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// Known issues:
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// - assumes (V,F) is edge-manifold.
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template <
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typename DerivedV,
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typename DerivedF,
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typename DerivedNV,
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typename DerivedNF>
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IGL_INLINE void upsample(
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const Eigen::PlainObjectBase<DerivedV>& V,
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const Eigen::PlainObjectBase<DerivedF>& F,
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Eigen::PlainObjectBase<DerivedNV>& NV,
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Eigen::PlainObjectBase<DerivedNF>& NF,
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const int number_of_subdivs = 1);
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// Virtually in place wrapper
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template <
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typename MatV,
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typename MatF>
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IGL_INLINE void upsample(
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MatV& V,
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MatF& F,
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const int number_of_subdivs = 1);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "upsample.cpp"
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#endif
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#endif
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