891182ee19
This is the most common use case for ArrayHandleCounting, and this class is a bit easier to use and a bit faster.
127 lines
4.4 KiB
C++
127 lines
4.4 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 2014 Sandia Corporation.
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// Copyright 2014 UT-Battelle, LLC.
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// Copyright 2014 Los Alamos National Security.
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//
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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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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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#include <vtkm/worklet/IsosurfaceUniformGrid.h>
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#include <vtkm/worklet/DispatcherMapField.h>
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#include <vtkm/cont/CellSetExplicit.h>
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#include <vtkm/cont/DataSet.h>
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#include <vtkm/cont/testing/Testing.h>
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#include <vector>
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namespace {
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class TangleField : public vtkm::worklet::WorkletMapField
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{
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public:
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typedef void ControlSignature(FieldIn<IdType> vertexId, FieldOut<Scalar> v);
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typedef void ExecutionSignature(_1, _2);
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typedef _1 InputDomain;
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const vtkm::Id xdim, ydim, zdim;
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const float xmin, ymin, zmin, xmax, ymax, zmax;
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const vtkm::Id cellsPerLayer;
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VTKM_CONT_EXPORT
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TangleField(const vtkm::Id3 dims, const float mins[3], const float maxs[3]) : xdim(dims[0]), ydim(dims[1]), zdim(dims[2]),
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xmin(mins[0]), ymin(mins[1]), zmin(mins[2]), xmax(maxs[0]), ymax(maxs[1]), zmax(maxs[2]), cellsPerLayer((xdim) * (ydim)) { };
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VTKM_EXEC_EXPORT
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void operator()(const vtkm::Id &vertexId, vtkm::Float32 &v) const
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{
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const vtkm::Id x = vertexId % (xdim);
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const vtkm::Id y = (vertexId / (xdim)) % (ydim);
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const vtkm::Id z = vertexId / cellsPerLayer;
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const float fx = static_cast<float>(x) / static_cast<float>(xdim-1);
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const float fy = static_cast<float>(y) / static_cast<float>(xdim-1);
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const float fz = static_cast<float>(z) / static_cast<float>(xdim-1);
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const vtkm::Float32 xx = 3.0f*(xmin+(xmax-xmin)*(fx));
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const vtkm::Float32 yy = 3.0f*(ymin+(ymax-ymin)*(fy));
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const vtkm::Float32 zz = 3.0f*(zmin+(zmax-zmin)*(fz));
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v = (xx*xx*xx*xx - 5.0f*xx*xx + yy*yy*yy*yy - 5.0f*yy*yy + zz*zz*zz*zz - 5.0f*zz*zz + 11.8f) * 0.2f + 0.5f;
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}
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};
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vtkm::cont::DataSet MakeIsosurfaceTestDataSet(vtkm::Id3 dims)
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{
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vtkm::cont::DataSet dataSet;
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const vtkm::Id3 vdims(dims[0] + 1, dims[1] + 1, dims[2] + 1);
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float mins[3] = {-1.0f, -1.0f, -1.0f};
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float maxs[3] = {1.0f, 1.0f, 1.0f};
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vtkm::cont::ArrayHandle<vtkm::Float32> fieldArray;
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vtkm::cont::ArrayHandleIndex vertexCountImplicitArray(vdims[0]*vdims[1]*vdims[2]);
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vtkm::worklet::DispatcherMapField<TangleField> tangleFieldDispatcher(TangleField(vdims, mins, maxs));
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tangleFieldDispatcher.Invoke(vertexCountImplicitArray, fieldArray);
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vtkm::cont::ArrayHandleUniformPointCoordinates coordinates(vdims);
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dataSet.AddCoordinateSystem(
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vtkm::cont::CoordinateSystem("coordinates", 1, coordinates));
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dataSet.AddField(vtkm::cont::Field("nodevar", 1, vtkm::cont::Field::ASSOC_POINTS, fieldArray));
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static const vtkm::IdComponent ndim = 3;
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vtkm::cont::CellSetStructured<ndim> cellSet("cells");
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cellSet.SetPointDimensions(vdims);
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dataSet.AddCellSet(cellSet);
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return dataSet;
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}
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}
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void TestIsosurfaceUniformGrid()
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{
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std::cout << "Testing IsosurfaceUniformGrid Filter" << std::endl;
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vtkm::Id3 dims(4,4,4);
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vtkm::cont::DataSet dataSet = MakeIsosurfaceTestDataSet(dims);
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typedef VTKM_DEFAULT_DEVICE_ADAPTER_TAG DeviceAdapter;
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vtkm::worklet::IsosurfaceFilterUniformGrid<vtkm::Float32,
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DeviceAdapter> isosurfaceFilter(dims, dataSet);
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vtkm::cont::ArrayHandle<vtkm::Vec<vtkm::Float32,3> > verticesArray, normalsArray;
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vtkm::cont::ArrayHandle<vtkm::Float32> scalarsArray;
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isosurfaceFilter.Run(0.5,
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dataSet.GetField("nodevar").GetData(),
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verticesArray,
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normalsArray,
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scalarsArray);
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VTKM_TEST_ASSERT(test_equal(verticesArray.GetNumberOfValues(), 480),
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"Wrong result for Isosurface filter");
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}
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int UnitTestIsosurfaceUniformGrid(int, char *[])
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{
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return vtkm::cont::testing::Testing::Run(TestIsosurfaceUniformGrid);
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}
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