83 lines
2.5 KiB
C
83 lines
2.5 KiB
C
|
// This file is part of libigl, a simple c++ geometry processing library.
|
||
|
|
//
|
||
|
|
// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
|
||
|
|
//
|
||
|
|
// This Source Code Form is subject to the terms of the Mozilla Public License
|
||
|
|
// v. 2.0. If a copy of the MPL was not distributed with this file, You can
|
||
|
|
// obtain one at http://mozilla.org/MPL/2.0/.
|
||
|
|
#ifndef IGL_UPSAMPLE_H
|
||
|
|
#define IGL_UPSAMPLE_H
|
||
|
|
#include "igl_inline.h"
|
||
|
|
|
||
|
|
#include <Eigen/Core>
|
||
|
|
#include <Eigen/Sparse>
|
||
|
|
|
||
|
|
// History:
|
||
|
|
// changed templates from generic matrices to PlainObjectBase Alec May 7, 2011
|
||
|
|
namespace igl
|
||
|
|
{
|
||
|
|
// Subdivide without moving vertices: Given the triangle mesh [V, F],
|
||
|
|
// where n_verts = V.rows(), computes newV and a sparse matrix S s.t.
|
||
|
|
// [newV, newF] is the subdivided mesh where newV = S*V.
|
||
|
|
//
|
||
|
|
// Inputs:
|
||
|
|
// n_verts an integer (number of mesh vertices)
|
||
|
|
// F an m by 3 matrix of integers of triangle faces
|
||
|
|
// Outputs:
|
||
|
|
// S a sparse matrix (will become the subdivision matrix)
|
||
|
|
// newF a matrix containing the new faces
|
||
|
|
template <
|
||
|
|
typename DerivedF,
|
||
|
|
typename SType,
|
||
|
|
typename DerivedNF>
|
||
|
|
IGL_INLINE void upsample(
|
||
|
|
const int n_verts,
|
||
|
|
const Eigen::PlainObjectBase<DerivedF>& F,
|
||
|
|
Eigen::SparseMatrix<SType>& S,
|
||
|
|
Eigen::PlainObjectBase<DerivedNF>& NF);
|
||
|
|
// Subdivide a mesh without moving vertices: loop subdivision but odd
|
||
|
|
// vertices stay put and even vertices are just edge midpoints
|
||
|
|
//
|
||
|
|
// Templates:
|
||
|
|
// MatV matrix for vertex positions, e.g. MatrixXd
|
||
|
|
// MatF matrix for vertex positions, e.g. MatrixXi
|
||
|
|
// Inputs:
|
||
|
|
// V #V by dim mesh vertices
|
||
|
|
// F #F by 3 mesh triangles
|
||
|
|
// Outputs:
|
||
|
|
// NV new vertex positions, V is guaranteed to be at top
|
||
|
|
// NF new list of face indices
|
||
|
|
//
|
||
|
|
// NOTE: V should not be the same as NV,
|
||
|
|
// NOTE: F should not be the same as NF, use other proto
|
||
|
|
//
|
||
|
|
// Known issues:
|
||
|
|
// - assumes (V,F) is edge-manifold.
|
||
|
|
template <
|
||
|
|
typename DerivedV,
|
||
|
|
typename DerivedF,
|
||
|
|
typename DerivedNV,
|
||
|
|
typename DerivedNF>
|
||
|
|
IGL_INLINE void upsample(
|
||
|
|
const Eigen::PlainObjectBase<DerivedV>& V,
|
||
|
|
const Eigen::PlainObjectBase<DerivedF>& F,
|
||
|
|
Eigen::PlainObjectBase<DerivedNV>& NV,
|
||
|
|
Eigen::PlainObjectBase<DerivedNF>& NF,
|
||
|
|
const int number_of_subdivs = 1);
|
||
|
|
|
||
|
|
// Virtually in place wrapper
|
||
|
|
template <
|
||
|
|
typename MatV,
|
||
|
|
typename MatF>
|
||
|
|
IGL_INLINE void upsample(
|
||
|
|
MatV& V,
|
||
|
|
MatF& F,
|
||
|
|
const int number_of_subdivs = 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifndef IGL_STATIC_LIBRARY
|
||
|
|
# include "upsample.cpp"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif
|