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109 lines
4.7 KiB
109 lines
4.7 KiB
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2016 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_COPYLEFT_CGAL_TRIM_WITH_SOLID_H
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#define IGL_COPYLEFT_CGAL_TRIM_WITH_SOLID_H
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#include "../../igl_inline.h"
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#include <Eigen/Core>
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namespace igl
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{
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namespace copyleft
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{
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namespace cgal
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{
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enum TrimWithSolidMethod
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{
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/// Resolve intersections only between A and B and then check whether
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/// every face in A is inside/outside of B. (Included for debugging).
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CHECK_EACH_FACE = 1,
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/// Resolve intersections only between A and B, then separate into
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/// patches of connected faces --- where connected means sharing an edge
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/// and _not_ the same original face in A --- then label each patch as
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/// inside or outside. This should always be strictly equivalent in
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/// output and strictly fewer FLOPS than CHECK_EACH_FACE. There will be
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/// many tiny patches along the intersection of A and B.
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CHECK_EACH_PATCH = 2,
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/// Merge A and B into the same mesh and resolve all self-itnersections.
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/// Then "undo" remeshing on faces of A not involved in intersections
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/// with B (i.e., self-intersections in A). Then seperate into patches
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/// based on connected faces --- where connected means sharing a
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/// _manifold edge_ --- then label each aptch as inside or outside.
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/// Results in fewer patches than CHECK_EACH_PATCH but finding, meshing and
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/// mesh-undoing self-intersections in A can be costly. This
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/// could result in different output from CHECK_EACH_PATCH because of
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/// shared remeshing with (i.e., faces in A that both intersect B and
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/// other faces in A). If A has no self-intersections then I claim the
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/// outputs should be the same.
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RESOLVE_BOTH_AND_RESTORE_THEN_CHECK_EACH_PATCH = 3,
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};
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/// Given an arbitrary mesh (VA,FA) and the boundary mesh
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/// (VB,FB) of a solid (as defined in [Zhou et al. 2016]), Resolve intersections
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/// between A and B subdividing faces of A so that intersections with B exists
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/// only along edges and vertices (and coplanar faces). Then determine whether
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/// each of these faces is inside or outside of B. This can be used to extract
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/// the part of A inside or outside of B.
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///
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/// @param[in] VA #VA by 3 list of mesh vertex positions of A
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/// @param[in] FA #FA by 3 list of mesh triangle indices into VA
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/// @param[in] VB #VB by 3 list of mesh vertex positions of B
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/// @param[in] FB #FB by 3 list of mesh triangle indices into VB
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/// @param[out] V #V by 3 list of mesh vertex positions of output
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/// @param[out] F #F by 3 list of mesh triangle indices into V
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/// @param[out] D #F list of bools whether face is inside B
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/// @param[out] J #F list of indices into FA revealing birth parent
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///
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template <
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typename DerivedVA,
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typename DerivedFA,
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typename DerivedVB,
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typename DerivedFB,
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typename DerivedV,
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typename DerivedF,
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typename DerivedD,
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typename DerivedJ>
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IGL_INLINE void trim_with_solid(
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const Eigen::PlainObjectBase<DerivedVA> & VA,
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const Eigen::PlainObjectBase<DerivedFA> & FA,
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const Eigen::PlainObjectBase<DerivedVB> & VB,
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const Eigen::PlainObjectBase<DerivedFB> & FB,
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Eigen::PlainObjectBase<DerivedV> & Vd,
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Eigen::PlainObjectBase<DerivedF> & F,
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Eigen::PlainObjectBase<DerivedD> & D,
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Eigen::PlainObjectBase<DerivedJ> & J);
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/// \overload
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///
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/// @param[in] method which method for extracting and determining the
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/// trim contents.
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template <
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typename DerivedVA,
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typename DerivedFA,
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typename DerivedVB,
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typename DerivedFB,
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typename DerivedV,
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typename DerivedF,
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typename DerivedD,
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typename DerivedJ>
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IGL_INLINE void trim_with_solid(
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const Eigen::PlainObjectBase<DerivedVA> & VA,
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const Eigen::PlainObjectBase<DerivedFA> & FA,
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const Eigen::PlainObjectBase<DerivedVB> & VB,
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const Eigen::PlainObjectBase<DerivedFB> & FB,
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const TrimWithSolidMethod method,
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Eigen::PlainObjectBase<DerivedV> & Vd,
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Eigen::PlainObjectBase<DerivedF> & F,
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Eigen::PlainObjectBase<DerivedD> & D,
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Eigen::PlainObjectBase<DerivedJ> & J);
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}
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}
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "trim_with_solid.cpp"
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#endif
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#endif
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