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73 lines
2.4 KiB
73 lines
2.4 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_RAY_MESH_INTERSECT_H
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#define IGL_RAY_MESH_INTERSECT_H
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#include "igl_inline.h"
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#include "Hit.h"
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#include <Eigen/Core>
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#include <vector>
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namespace igl
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{
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/// Shoot a ray against a mesh (V,F) and collect all hits. If you have many
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/// rays, consider using AABB.h
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///
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/// @param[in] source 3-vector origin of ray
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/// @param[in] dir 3-vector direction of ray
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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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/// @param[out] hits **sorted** list of hits
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/// @return true if there were any hits (hits.size() > 0)
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///
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/// \see AABB
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template <
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typename Derivedsource,
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typename Deriveddir,
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typename DerivedV,
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typename DerivedF>
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IGL_INLINE bool ray_mesh_intersect(
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const Eigen::MatrixBase<Derivedsource> & source,
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const Eigen::MatrixBase<Deriveddir> & dir,
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const Eigen::MatrixBase<DerivedV> & V,
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const Eigen::MatrixBase<DerivedF> & F,
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std::vector<igl::Hit> & hits);
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/// \overload
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/// @param[in] hit first hit, set only if it exists
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template <
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typename Derivedsource,
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typename Deriveddir,
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typename DerivedV,
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typename DerivedF>
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IGL_INLINE bool ray_mesh_intersect(
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const Eigen::MatrixBase<Derivedsource> & source,
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const Eigen::MatrixBase<Deriveddir> & dir,
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const Eigen::MatrixBase<DerivedV> & V,
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const Eigen::MatrixBase<DerivedF> & F,
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igl::Hit & hit);
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// Explicit function to check one triangle (given by index f) of the mesh.
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// This function is used by ray_mesh_intersect to check each triangle.
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// Outputs:
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// hit hit with the given triangle, set only if it exists
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// Returns true if there was a hit
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template <
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typename Derivedsource,
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typename Deriveddir,
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typename DerivedV,
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typename DerivedF>
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IGL_INLINE bool ray_triangle_intersect(
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const Eigen::MatrixBase<Derivedsource> & source,
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const Eigen::MatrixBase<Deriveddir> & dir,
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const Eigen::MatrixBase<DerivedV> & V,
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const Eigen::MatrixBase<DerivedF> & F,
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const int f,
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igl::Hit& hit);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "ray_mesh_intersect.cpp"
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#endif
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#endif
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