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71 lines
2.5 KiB
71 lines
2.5 KiB
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2013 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_EMBREE_UNPROJECT_IN_MESH
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#define IGL_EMBREE_UNPROJECT_IN_MESH
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#include "../igl_inline.h"
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#include <Eigen/Core>
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#include <vector>
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#include "../Hit.h"
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namespace igl
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{
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namespace embree
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{
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// Forward define
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class EmbreeIntersector;
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/// Unproject a screen location (using current opengl viewport, projection, and
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/// model view) to a 3D position _inside_ a given mesh. If the ray through the
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/// given screen location (x,y) _hits_ the mesh more than twice then the 3D
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/// midpoint between the first two hits is return. If it hits once, then that
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/// point is return. If it does not hit the mesh then obj is not set.
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///
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///
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/// @param[in] pos screen space coordinates
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/// @param[in] model model matrix
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/// @param[in] proj projection matrix
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/// @param[in] viewport vieweport vector
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/// @param[in] ei EmbreeIntersector containing (V,F)
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/// @param[out] obj 3d unprojected mouse point in mesh
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/// @param[out] hits vector of embree hits
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/// @return number of hits
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///
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/// \note Previous prototype did not require model, proj, and viewport. This
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/// has been removed. Instead replace with:
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///
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/// Eigen::Matrix4f model,proj;
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/// Eigen::Vector4f viewport;
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/// igl::opengl2::model_proj_viewport(model,proj,viewport);
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/// igl::embree::unproject_in_mesh(Vector2f(x,y),model,proj,viewport,ei,obj,hits);
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///
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template < typename Derivedobj>
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IGL_INLINE int unproject_in_mesh(
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const Eigen::Vector2f& pos,
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const Eigen::Matrix4f& model,
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const Eigen::Matrix4f& proj,
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const Eigen::Vector4f& viewport,
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const EmbreeIntersector & ei,
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Eigen::PlainObjectBase<Derivedobj> & obj,
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std::vector<igl::Hit > & hits);
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/// \overload
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template < typename Derivedobj>
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IGL_INLINE int unproject_in_mesh(
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const Eigen::Vector2f& pos,
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const Eigen::Matrix4f& model,
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const Eigen::Matrix4f& proj,
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const Eigen::Vector4f& viewport,
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const EmbreeIntersector & ei,
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Eigen::PlainObjectBase<Derivedobj> & obj);
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}
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "unproject_in_mesh.cpp"
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#endif
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#endif
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