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95 lines
3.2 KiB
95 lines
3.2 KiB
1 year ago
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// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2017 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_SHAPE_DIAMETER_FUNCTION_H
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#define IGL_SHAPE_DIAMETER_FUNCTION_H
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#include "igl_inline.h"
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#include "AABB.h"
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#include <Eigen/Core>
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#include <functional>
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namespace igl
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{
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/// Compute shape diamater function per given point. In the parlence of the
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/// paper "Consistent Mesh Partitioning and Skeletonisation using the Shape
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/// Diameter Function" [Shapiro et al. 2008], this implementation uses a 180°
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/// cone and a _uniform_ average (_not_ a average weighted by inverse angles).
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///
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/// @param[in] shoot_ray function handle that outputs hits of a given ray against a
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/// mesh (embedded in function handles as captured variable/data)
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/// @param[in] P #P by 3 list of origin points
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/// @param[in] N #P by 3 list of origin normals
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/// @param[out] S #P list of shape diamater function values between bounding box
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/// @param[out] diagonal (perfect sphere) and 0 (perfect needle hook)
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///
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template <
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typename DerivedP,
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typename DerivedN,
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typename DerivedS >
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IGL_INLINE void shape_diameter_function(
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const std::function<
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double(
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const Eigen::Vector3f&,
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const Eigen::Vector3f&)
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> & shoot_ray,
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const Eigen::MatrixBase<DerivedP> & P,
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const Eigen::MatrixBase<DerivedN> & N,
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const int num_samples,
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Eigen::PlainObjectBase<DerivedS> & S);
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/// \overload
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///
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/// @param[in] AABB axis-aligned bounding box hierarchy around (V,F)
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/// @param[in] V #V by 3 list of mesh vertex positions
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/// @param[in] F #F by 3 list of mesh face indices into V
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template <
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typename DerivedV,
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int DIM,
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typename DerivedF,
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typename DerivedP,
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typename DerivedN,
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typename DerivedS >
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IGL_INLINE void shape_diameter_function(
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const igl::AABB<DerivedV,DIM> & aabb,
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const Eigen::MatrixBase<DerivedV> & V,
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const Eigen::MatrixBase<DerivedF> & F,
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const Eigen::MatrixBase<DerivedP> & P,
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const Eigen::MatrixBase<DerivedN> & N,
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const int num_samples,
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Eigen::PlainObjectBase<DerivedS> & S);
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/// \overload
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template <
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typename DerivedV,
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typename DerivedF,
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typename DerivedP,
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typename DerivedN,
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typename DerivedS >
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IGL_INLINE void shape_diameter_function(
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const Eigen::MatrixBase<DerivedV> & V,
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const Eigen::MatrixBase<DerivedF> & F,
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const Eigen::MatrixBase<DerivedP> & P,
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const Eigen::MatrixBase<DerivedN> & N,
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const int num_samples,
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Eigen::PlainObjectBase<DerivedS> & S);
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/// @param[in] per_face whether to compute per face (S is #F by 1) or per vertex (S is
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/// #V by 1)
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template <
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typename DerivedV,
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typename DerivedF,
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typename DerivedS>
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IGL_INLINE void shape_diameter_function(
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const Eigen::MatrixBase<DerivedV> & V,
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const Eigen::MatrixBase<DerivedF> & F,
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const bool per_face,
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const int num_samples,
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Eigen::PlainObjectBase<DerivedS> & S);
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};
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#ifndef IGL_STATIC_LIBRARY
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# include "shape_diameter_function.cpp"
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#endif
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#endif
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