//---------------------------------------------------------------------------//
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// Copyright (c) 2013-2014 Kyle Lutz <kyle.r.lutz@gmail.com>
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//
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// Distributed under the Boost Software License, Version 1.0
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// See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt
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//
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// See http://boostorg.github.com/compute for more information.
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//---------------------------------------------------------------------------//
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#ifndef BOOST_COMPUTE_INTEROP_VTK_POINTS_HPP
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#define BOOST_COMPUTE_INTEROP_VTK_POINTS_HPP
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#include <vector>
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#include <vtkPoints.h>
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#include <boost/compute/system.hpp>
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#include <boost/compute/command_queue.hpp>
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#include <boost/compute/algorithm/copy.hpp>
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#include <boost/compute/iterator/buffer_iterator.hpp>
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namespace boost {
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namespace compute {
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/// Copies \p points to \p buffer.
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///
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/// For example, to copy from a \c vtkPoints object to a \c vector<float4_>:
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/// \code
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/// vtkPoints *points = ...
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/// vector<float4_> vector(points->GetNumberOfPoints(), context);
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/// vtk_copy_points_to_buffer(points, vector.begin(), queue);
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/// \endcode
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template<class PointType>
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inline void vtk_copy_points_to_buffer(const vtkPoints *points,
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buffer_iterator<PointType> buffer,
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command_queue &queue = system::default_queue())
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{
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vtkPoints *points_ = const_cast<vtkPoints *>(points);
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// copy points to aligned buffer
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std::vector<PointType> tmp(points_->GetNumberOfPoints());
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for(vtkIdType i = 0; i < points_->GetNumberOfPoints(); i++){
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double *p = points_->GetPoint(i);
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tmp[i] = PointType(p[0], p[1], p[2], 1);
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}
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// copy data to device
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copy(tmp.begin(), tmp.end(), buffer, queue);
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}
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} // end compute namespace
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} // end boost namespace
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#endif // BOOST_COMPUTE_INTEROP_VTK_POINTS_HPP
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