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53 lines
1.9 KiB
53 lines
1.9 KiB
#ifndef IGL_COPYLEFT_CGAL_HALF_SPACE_BOX_H
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#define IGL_COPYLEFT_CGAL_HALF_SPACE_BOX_H
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#include "../../igl_inline.h"
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#include <Eigen/Core>
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#include <CGAL/Exact_predicates_exact_constructions_kernel.h>
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#include <CGAL/Plane_3.h>
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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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/// Construct a mesh of box (BV,BF) so that it contains the intersection of
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/// the half-space under the plane (P) and the bounding box of V, and does not
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/// contain any of the half-space above (P).
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///
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/// @param[in] P plane so that normal points away from half-space
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/// @param[in] V #V by 3 list of vertex positions
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/// @param[out] BV #BV by 3 list of box vertex positions
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/// @param[out] BF #BF b3 list of box triangle indices into BV
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template <typename DerivedV>
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IGL_INLINE void half_space_box(
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const CGAL::Plane_3<CGAL::Epeck> & P,
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const Eigen::MatrixBase<DerivedV> & V,
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Eigen::Matrix<CGAL::Epeck::FT,8,3> & BV,
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Eigen::Matrix<int,12,3> & BF);
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/// \overload
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/// @param[in] p 3d point on plane
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/// @param[in] n 3d vector of normal of plane pointing away from inside
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template <typename Derivedp, typename Derivedn, typename DerivedV>
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IGL_INLINE void half_space_box(
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const Eigen::MatrixBase<Derivedp> & p,
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const Eigen::MatrixBase<Derivedn> & n,
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const Eigen::MatrixBase<DerivedV> & V,
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Eigen::Matrix<CGAL::Epeck::FT,8,3> & BV,
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Eigen::Matrix<int,12,3> & BF);
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/// \overload
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/// @param[in] equ plane equation: a*x+b*y+c*z + d = 0
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template <typename Derivedequ, typename DerivedV>
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IGL_INLINE void half_space_box(
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const Eigen::MatrixBase<Derivedequ> & equ,
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const Eigen::MatrixBase<DerivedV> & V,
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Eigen::Matrix<CGAL::Epeck::FT,8,3> & BV,
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Eigen::Matrix<int,12,3> & BF);
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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 "half_space_box.cpp"
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#endif
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#endif
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