81 lines
2.8 KiB
C++
81 lines
2.8 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_PER_VERTEX_NORMALS_H
|
|
#define IGL_PER_VERTEX_NORMALS_H
|
|
#include "igl_inline.h"
|
|
#include <Eigen/Core>
|
|
// Note: It would be nice to support more or all of the methods here:
|
|
// "A comparison of algorithms for vertex normal computation"
|
|
namespace igl
|
|
{
|
|
enum PerVertexNormalsWeightingType
|
|
{
|
|
// Incident face normals have uniform influence on vertex normal
|
|
PER_VERTEX_NORMALS_WEIGHTING_TYPE_UNIFORM = 0,
|
|
// Incident face normals are averaged weighted by area
|
|
PER_VERTEX_NORMALS_WEIGHTING_TYPE_AREA = 1,
|
|
// Incident face normals are averaged weighted by incident angle of vertex
|
|
PER_VERTEX_NORMALS_WEIGHTING_TYPE_ANGLE = 2,
|
|
// Area weights
|
|
PER_VERTEX_NORMALS_WEIGHTING_TYPE_DEFAULT = 3,
|
|
NUM_PER_VERTEX_NORMALS_WEIGHTING_TYPE = 4
|
|
};
|
|
// Compute vertex normals via vertex position list, face list
|
|
// Inputs:
|
|
// V #V by 3 eigen Matrix of mesh vertex 3D positions
|
|
// F #F by 3 eigne Matrix of face (triangle) indices
|
|
// weighting Weighting type
|
|
// Output:
|
|
// N #V by 3 eigen Matrix of mesh vertex 3D normals
|
|
template <
|
|
typename DerivedV,
|
|
typename DerivedF,
|
|
typename DerivedN>
|
|
IGL_INLINE void per_vertex_normals(
|
|
const Eigen::MatrixBase<DerivedV>& V,
|
|
const Eigen::MatrixBase<DerivedF>& F,
|
|
const igl::PerVertexNormalsWeightingType weighting,
|
|
Eigen::PlainObjectBase<DerivedN> & N);
|
|
// Without weighting
|
|
template <
|
|
typename DerivedV,
|
|
typename DerivedF,
|
|
typename DerivedN>
|
|
IGL_INLINE void per_vertex_normals(
|
|
const Eigen::MatrixBase<DerivedV>& V,
|
|
const Eigen::MatrixBase<DerivedF>& F,
|
|
Eigen::PlainObjectBase<DerivedN> & N);
|
|
// Inputs:
|
|
// FN #F by 3 matrix of face (triangle) normals
|
|
template <typename DerivedV, typename DerivedF, typename DerivedFN, typename DerivedN>
|
|
IGL_INLINE void per_vertex_normals(
|
|
const Eigen::MatrixBase<DerivedV>& V,
|
|
const Eigen::MatrixBase<DerivedF>& F,
|
|
const PerVertexNormalsWeightingType weighting,
|
|
const Eigen::MatrixBase<DerivedFN>& FN,
|
|
Eigen::PlainObjectBase<DerivedN> & N);
|
|
// Without weighting
|
|
template <
|
|
typename DerivedV,
|
|
typename DerivedF,
|
|
typename DerivedFN,
|
|
typename DerivedN>
|
|
IGL_INLINE void per_vertex_normals(
|
|
const Eigen::MatrixBase<DerivedV>& V,
|
|
const Eigen::MatrixBase<DerivedF>& F,
|
|
const Eigen::MatrixBase<DerivedFN>& FN,
|
|
Eigen::PlainObjectBase<DerivedN> & N);
|
|
|
|
}
|
|
|
|
#ifndef IGL_STATIC_LIBRARY
|
|
# include "per_vertex_normals.cpp"
|
|
#endif
|
|
|
|
#endif
|