91 lines
3.1 KiB
C++
91 lines
3.1 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
|
|
//
|
|
// Copyright (C) 2016 Qingnan Zhou <qnzhou@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_COPYLEFT_CGAL_EXTRACT_FEATURE_H
|
|
#define IGL_COPYLEFT_CGAL_EXTRACT_FEATURE_H
|
|
#include "../../igl_inline.h"
|
|
#include <Eigen/Core>
|
|
#include <vector>
|
|
|
|
namespace igl
|
|
{
|
|
namespace copyleft
|
|
{
|
|
namespace cgal
|
|
{
|
|
// Extract feature edges based on dihedral angle.
|
|
// Here, dihedral angle is defined as the angle between surface
|
|
// __normals__ as described in
|
|
// http://mathworld.wolfram.com/DihedralAngle.html
|
|
//
|
|
// Non-manifold and boundary edges are automatically considered as
|
|
// features.
|
|
//
|
|
// Inputs:
|
|
// V #V by 3 array of vertices.
|
|
// F #F by 3 array of faces.
|
|
// tol Edges with dihedral angle larger than this are considered
|
|
// as features. Angle is measured in radian.
|
|
//
|
|
// Output:
|
|
// feature_edges: #E by 2 array of edges. Each edge satisfies at
|
|
// least one of the following criteria:
|
|
//
|
|
// * Edge has dihedral angle larger than tol.
|
|
// * Edge is boundary.
|
|
// * Edge is non-manifold (i.e. it has more than 2 adjacent
|
|
// faces).
|
|
template <
|
|
typename DerivedV,
|
|
typename DerivedF,
|
|
typename DerivedE>
|
|
IGL_INLINE void extract_feature(
|
|
const Eigen::PlainObjectBase<DerivedV>& V,
|
|
const Eigen::PlainObjectBase<DerivedF>& F,
|
|
const double tol,
|
|
Eigen::PlainObjectBase<DerivedE>& feature_edges);
|
|
|
|
// Inputs:
|
|
// V #V by 3 array of vertices.
|
|
// F #F by 3 array of faces.
|
|
// tol Edges with dihedral angle larger than this are considered
|
|
// as features. Angle is measured in radian.
|
|
// E #E by 2 array of directed edges.
|
|
// uE #uE by 2 array of undirected edges.
|
|
// uE2E #uE list of lists mapping undirected edges to all corresponding
|
|
// directed edges.
|
|
//
|
|
// Output:
|
|
// feature_edges: #E by 2 array of edges. Each edge satisfies at
|
|
// least one of the following criteria:
|
|
//
|
|
// * Edge has dihedral angle larger than tol.
|
|
// * Edge is boundary.
|
|
// * Edge is non-manifold (i.e. it has more than 2 adjacent
|
|
// faces).
|
|
template <
|
|
typename DerivedV,
|
|
typename DerivedF,
|
|
typename DerivedE>
|
|
IGL_INLINE void extract_feature(
|
|
const Eigen::PlainObjectBase<DerivedV>& V,
|
|
const Eigen::PlainObjectBase<DerivedF>& F,
|
|
const double tol,
|
|
const Eigen::PlainObjectBase<DerivedE>& E,
|
|
const Eigen::PlainObjectBase<DerivedE>& uE,
|
|
const std::vector<std::vector<typename DerivedE::Scalar> >& uE2E,
|
|
Eigen::PlainObjectBase<DerivedE>& feature_edges);
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifndef IGL_STATIC_LIBRARY
|
|
# include "extract_feature.cpp"
|
|
#endif
|
|
#endif
|