ray_mesh_intersect.h

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// This file is part of libigl, a simple c++ geometry processing library.
// 
// Copyright (C) 2016 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_RAY_MESH_INTERSECT_H
#define IGL_RAY_MESH_INTERSECT_H
#include "igl_inline.h"
#include "Hit.h"
#include <Eigen/Core>
#include <vector>
namespace igl
{
  template <
    typename Derivedsource,
    typename Deriveddir,
    typename DerivedV, 
    typename DerivedF> 
  IGL_INLINE bool ray_mesh_intersect(
    const Eigen::MatrixBase<Derivedsource> & source,
    const Eigen::MatrixBase<Deriveddir> & dir,
    const Eigen::MatrixBase<DerivedV> & V,
    const Eigen::MatrixBase<DerivedF> & F,
    std::vector<igl::Hit> & hits);
  template <
    typename Derivedsource,
    typename Deriveddir,
    typename DerivedV, 
    typename DerivedF> 
  IGL_INLINE bool ray_mesh_intersect(
    const Eigen::MatrixBase<Derivedsource> & source,
    const Eigen::MatrixBase<Deriveddir> & dir,
    const Eigen::MatrixBase<DerivedV> & V,
    const Eigen::MatrixBase<DerivedF> & F,
    igl::Hit & hit);
 
  // Explicit function to check one triangle (given by index f) of the mesh.
  // This function is used by ray_mesh_intersect to check each triangle.
  // Outputs:
  //   hit  hit with the given triangle, set only if it exists
  // Returns true if there was a hit
  template <
    typename Derivedsource,
    typename Deriveddir,
    typename DerivedV,
    typename DerivedF>
  IGL_INLINE bool ray_triangle_intersect(
    const Eigen::MatrixBase<Derivedsource> & source,
    const Eigen::MatrixBase<Deriveddir> & dir,
    const Eigen::MatrixBase<DerivedV> & V,
    const Eigen::MatrixBase<DerivedF> & F,
    const int f,
    igl::Hit& hit);
}
#ifndef IGL_STATIC_LIBRARY
#  include "ray_mesh_intersect.cpp"
#endif
#endif