65 lines
2.9 KiB
C
65 lines
2.9 KiB
C
|
// This file is part of libigl, a simple c++ geometry processing library.
|
||
|
|
//
|
||
|
|
// Copyright (C) 2016 Yotam Gingold <yotam@yotamgingold.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_SEAM_EDGES_H
|
||
|
|
#define IGL_SEAM_EDGES_H
|
||
|
|
#include "igl_inline.h"
|
||
|
|
#include <Eigen/Core>
|
||
|
|
namespace igl
|
||
|
|
{
|
||
|
|
// Finds all UV-space boundaries of a mesh.
|
||
|
|
//
|
||
|
|
// Inputs:
|
||
|
|
// V #V by dim list of positions of the input mesh.
|
||
|
|
// TC #TC by 2 list of 2D texture coordinates of the input mesh
|
||
|
|
// F #F by 3 list of triange indices into V representing a
|
||
|
|
// manifold-with-boundary triangle mesh
|
||
|
|
// FTC #F by 3 list of indices into TC for each corner
|
||
|
|
// Outputs:
|
||
|
|
// seams Edges where the forwards and backwards directions have different
|
||
|
|
// texture coordinates, as a #seams-by-4 matrix of indices. Each row is
|
||
|
|
// organized as [ forward_face_index, forward_face_vertex_index,
|
||
|
|
// backwards_face_index, backwards_face_vertex_index ] such that one side
|
||
|
|
// of the seam is the edge:
|
||
|
|
// F[ seams( i, 0 ), seams( i, 1 ) ], F[ seams( i, 0 ), (seams( i, 1 ) + 1) % 3 ]
|
||
|
|
// and the other side is the edge:
|
||
|
|
// F[ seams( i, 2 ), seams( i, 3 ) ], F[ seams( i, 2 ), (seams( i, 3 ) + 1) % 3 ]
|
||
|
|
// boundaries Edges with only one incident triangle, as a #boundaries-by-2
|
||
|
|
// matrix of indices. Each row is organized as
|
||
|
|
// [ face_index, face_vertex_index ]
|
||
|
|
// such that the edge is:
|
||
|
|
// F[ boundaries( i, 0 ), boundaries( i, 1 ) ], F[ boundaries( i, 0 ), (boundaries( i, 1 ) + 1) % 3 ]
|
||
|
|
// foldovers Edges where the two incident triangles fold over each other
|
||
|
|
// in UV-space, as a #foldovers-by-4 matrix of indices.
|
||
|
|
// Each row is organized as [ forward_face_index, forward_face_vertex_index,
|
||
|
|
// backwards_face_index, backwards_face_vertex_index ]
|
||
|
|
// such that one side of the foldover is the edge:
|
||
|
|
// F[ foldovers( i, 0 ), foldovers( i, 1 ) ], F[ foldovers( i, 0 ), (foldovers( i, 1 ) + 1) % 3 ]
|
||
|
|
// and the other side is the edge:
|
||
|
|
// F[ foldovers( i, 2 ), foldovers( i, 3 ) ], F[ foldovers( i, 2 ), (foldovers( i, 3 ) + 1) % 3 ]
|
||
|
|
template <
|
||
|
|
typename DerivedV,
|
||
|
|
typename DerivedTC,
|
||
|
|
typename DerivedF,
|
||
|
|
typename DerivedFTC,
|
||
|
|
typename Derivedseams,
|
||
|
|
typename Derivedboundaries,
|
||
|
|
typename Derivedfoldovers>
|
||
|
|
IGL_INLINE void seam_edges(
|
||
|
|
const Eigen::PlainObjectBase<DerivedV>& V,
|
||
|
|
const Eigen::PlainObjectBase<DerivedTC>& TC,
|
||
|
|
const Eigen::PlainObjectBase<DerivedF>& F,
|
||
|
|
const Eigen::PlainObjectBase<DerivedFTC>& FTC,
|
||
|
|
Eigen::PlainObjectBase<Derivedseams>& seams,
|
||
|
|
Eigen::PlainObjectBase<Derivedboundaries>& boundaries,
|
||
|
|
Eigen::PlainObjectBase<Derivedfoldovers>& foldovers);
|
||
|
|
}
|
||
|
|
#ifndef IGL_STATIC_LIBRARY
|
||
|
|
# include "seam_edges.cpp"
|
||
|
|
#endif
|
||
|
|
#endif
|