d879188de0
Rather than force all dispatchers to be templated on a device adapter, instead use a TryExecute internally within the invoke to select a device adapter. Because this removes the need to declare a device when invoking a worklet, this commit also removes the need to declare a device in several other areas of the code.
157 lines
5.4 KiB
C++
157 lines
5.4 KiB
C++
//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//
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// Copyright 2017 National Technology & Engineering Solutions of Sandia, LLC (NTESS).
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// Copyright 2014 UT-Battelle, LLC.
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// Copyright 2017 Los Alamos National Security.
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//
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// Under the terms of Contract DE-NA0003525 with NTESS,
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// the U.S. Government retains certain rights in this software.
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//
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//============================================================================
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#ifndef vtk_m_cont_PointLocatorUniformGrid_h
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#define vtk_m_cont_PointLocatorUniformGrid_h
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#include <vtkm/cont/Algorithm.h>
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#include <vtkm/cont/ArrayCopy.h>
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#include <vtkm/cont/ArrayHandleCounting.h>
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#include <vtkm/worklet/DispatcherMapField.h>
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#include <vtkm/worklet/WorkletMapField.h>
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#include <vtkm/cont/PointLocator.h>
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#include <vtkm/exec/PointLocatorUniformGrid.h>
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namespace vtkm
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{
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namespace cont
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{
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class PointLocatorUniformGrid : public vtkm::cont::PointLocator
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{
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public:
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PointLocatorUniformGrid(const vtkm::Vec<vtkm::FloatDefault, 3>& _min,
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const vtkm::Vec<vtkm::FloatDefault, 3>& _max,
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const vtkm::Vec<vtkm::Id, 3>& _dims)
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: PointLocator()
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, Min(_min)
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, Max(_max)
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, Dims(_dims)
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{
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}
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class BinPointsWorklet : public vtkm::worklet::WorkletMapField
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{
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public:
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using ControlSignature = void(FieldIn<> coord, FieldOut<> label);
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using ExecutionSignature = void(_1, _2);
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VTKM_CONT
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BinPointsWorklet(vtkm::Vec<vtkm::FloatDefault, 3> _min,
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vtkm::Vec<vtkm::FloatDefault, 3> _max,
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vtkm::Vec<vtkm::Id, 3> _dims)
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: Min(_min)
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, Dims(_dims)
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, Dxdydz((_max - Min) / Dims)
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{
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}
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template <typename CoordVecType, typename IdType>
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VTKM_EXEC void operator()(const CoordVecType& coord, IdType& label) const
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{
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vtkm::Vec<vtkm::Id, 3> ijk = (coord - Min) / Dxdydz;
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label = ijk[0] + ijk[1] * Dims[0] + ijk[2] * Dims[0] * Dims[1];
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}
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private:
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vtkm::Vec<vtkm::FloatDefault, 3> Min;
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vtkm::Vec<vtkm::Id, 3> Dims;
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vtkm::Vec<vtkm::FloatDefault, 3> Dxdydz;
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};
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void Build() override
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{
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// Save training data points.
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vtkm::cont::ArrayCopy(this->GetCoords().GetData(), this->coords);
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// generate unique id for each input point
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vtkm::cont::ArrayHandleCounting<vtkm::Id> pointCounting(0, 1, this->coords.GetNumberOfValues());
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vtkm::cont::ArrayCopy(pointCounting, this->pointIds);
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// bin points into cells and give each of them the cell id.
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BinPointsWorklet cellIdWorklet(this->Min, this->Max, this->Dims);
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vtkm::worklet::DispatcherMapField<BinPointsWorklet> dispatchCellId(cellIdWorklet);
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dispatchCellId.Invoke(this->coords, this->cellIds);
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// Group points of the same cell together by sorting them according to the cell ids
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vtkm::cont::Algorithm::SortByKey(this->cellIds, this->pointIds);
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// for each cell, find the lower and upper bound of indices to the sorted point ids.
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vtkm::cont::ArrayHandleCounting<vtkm::Id> cell_ids_counting(
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0, 1, this->Dims[0] * this->Dims[1] * this->Dims[2]);
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vtkm::cont::Algorithm::UpperBounds(this->cellIds, cell_ids_counting, this->cellUpper);
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vtkm::cont::Algorithm::LowerBounds(this->cellIds, cell_ids_counting, this->cellLower);
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}
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using HandleType = vtkm::cont::VirtualObjectHandle<vtkm::exec::PointLocator>;
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struct PrepareForExecutionFunctor
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{
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template <typename DeviceAdapter>
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VTKM_CONT bool operator()(DeviceAdapter,
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const vtkm::cont::PointLocatorUniformGrid& self,
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HandleType& handle) const
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{
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vtkm::exec::PointLocatorUniformGrid<DeviceAdapter>* h =
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new vtkm::exec::PointLocatorUniformGrid<DeviceAdapter>(
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self.Min,
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self.Max,
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self.Dims,
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self.coords.PrepareForInput(DeviceAdapter()),
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self.pointIds.PrepareForInput(DeviceAdapter()),
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self.cellLower.PrepareForInput(DeviceAdapter()),
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self.cellUpper.PrepareForInput(DeviceAdapter()));
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handle.Reset(h);
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return true;
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}
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};
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VTKM_CONT
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const HandleType PrepareForExecutionImp(vtkm::cont::DeviceAdapterId deviceId) const override
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{
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const bool success =
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vtkm::cont::TryExecuteOnDevice(deviceId, PrepareForExecutionFunctor(), *this, ExecHandle);
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if (!success)
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{
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throwFailedRuntimeDeviceTransfer("PointLocatorUniformGrid", deviceId);
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}
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return ExecHandle;
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}
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private:
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vtkm::Vec<vtkm::FloatDefault, 3> Min;
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vtkm::Vec<vtkm::FloatDefault, 3> Max;
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vtkm::Vec<vtkm::Id, 3> Dims;
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// TODO: how to convert CoordinateSystem to ArrayHandle<Vec<Float, 3>>?
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vtkm::cont::ArrayHandle<vtkm::Vec<vtkm::FloatDefault, 3>> coords;
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vtkm::cont::ArrayHandle<vtkm::Id> pointIds;
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vtkm::cont::ArrayHandle<vtkm::Id> cellIds;
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vtkm::cont::ArrayHandle<vtkm::Id> cellLower;
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vtkm::cont::ArrayHandle<vtkm::Id> cellUpper;
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// TODO: std::unique_ptr/std::shared_ptr?
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mutable HandleType ExecHandle;
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};
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}
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}
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#endif //vtk_m_cont_PointLocatorUniformGrid_h
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