mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-20 11:05:44 +00:00
351 lines
12 KiB
C++
351 lines
12 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/Math.h>
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#include <vtkm/cont/ArrayHandleUniformPointCoordinates.h>
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#include <vtkm/cont/CellSetSingleType.h>
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#include <vtkm/cont/DataSet.h>
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#include <vtkm/cont/DynamicArrayHandle.h>
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#include <vtkm/cont/testing/Testing.h>
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#include <vtkm/worklet/MarchingCubes.h>
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#include <vtkm/worklet/DispatcherMapField.h>
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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 vtkm::FloatDefault 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 vtkm::FloatDefault mins[3], const vtkm::FloatDefault 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 vtkm::FloatDefault fx = static_cast<vtkm::FloatDefault>(x) / static_cast<vtkm::FloatDefault>(xdim-1);
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const vtkm::FloatDefault fy = static_cast<vtkm::FloatDefault>(y) / static_cast<vtkm::FloatDefault>(xdim-1);
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const vtkm::FloatDefault fz = static_cast<vtkm::FloatDefault>(z) / static_cast<vtkm::FloatDefault>(xdim-1);
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const vtkm::Float32 xx = 3.0f*vtkm::Float32(xmin+(xmax-xmin)*(fx));
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const vtkm::Float32 yy = 3.0f*vtkm::Float32(ymin+(ymax-ymin)*(fy));
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const vtkm::Float32 zz = 3.0f*vtkm::Float32(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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vtkm::FloatDefault mins[3] = {-1.0f, -1.0f, -1.0f};
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vtkm::FloatDefault 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::Vec<vtkm::FloatDefault,3> origin(0.0f, 0.0f, 0.0f);
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vtkm::Vec<vtkm::FloatDefault,3> spacing(
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1.0f/static_cast<vtkm::FloatDefault>(dims[0]),
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1.0f/static_cast<vtkm::FloatDefault>(dims[2]),
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1.0f/static_cast<vtkm::FloatDefault>(dims[1]));
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vtkm::cont::ArrayHandleUniformPointCoordinates
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coordinates(vdims, origin, spacing);
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dataSet.AddCoordinateSystem(
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vtkm::cont::CoordinateSystem("coordinates", coordinates));
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dataSet.AddField(vtkm::cont::Field("nodevar", 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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class EuclideanNorm
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{
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public:
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VTKM_EXEC_CONT_EXPORT
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EuclideanNorm() : Reference(0.,0.,0.) {}
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VTKM_EXEC_CONT_EXPORT
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EuclideanNorm(vtkm::Vec<vtkm::Float32,3> reference):Reference(reference) {}
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VTKM_EXEC_CONT_EXPORT
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vtkm::Float32 operator()(vtkm::Vec<vtkm::Float32,3> v) const
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{
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vtkm::Vec<vtkm::Float32,3> d(v[0]-this->Reference[0],
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v[1]-this->Reference[1],
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v[2]-this->Reference[2]);
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return vtkm::Magnitude(d);
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}
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private:
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vtkm::Vec<vtkm::Float32,3> Reference;
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};
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class CubeGridConnectivity
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{
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public:
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VTKM_EXEC_CONT_EXPORT
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CubeGridConnectivity() : Dimension(1),
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DimSquared(1),
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DimPlus1Squared(4) {}
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VTKM_EXEC_CONT_EXPORT
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CubeGridConnectivity(vtkm::Id dim) : Dimension(dim),
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DimSquared(dim*dim),
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DimPlus1Squared((dim+1)*(dim+1)) {}
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VTKM_EXEC_CONT_EXPORT
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vtkm::Id operator()(vtkm::Id vertex) const
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{
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typedef vtkm::CellShapeTagHexahedron HexTag;
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typedef vtkm::CellTraits<HexTag> HexTraits;
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vtkm::Id cellId = vertex/HexTraits::NUM_POINTS;
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vtkm::Id localId = vertex%HexTraits::NUM_POINTS;
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vtkm::Id globalId =
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(cellId + cellId/this->Dimension +
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(this->Dimension+1)*(cellId/(this->DimSquared)));
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switch (localId)
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{
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case 2: globalId += 1;
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case 3: globalId += this->Dimension;
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case 1: globalId += 1;
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case 0: break;
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case 6: globalId += 1;
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case 7: globalId += this->Dimension;
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case 5: globalId += 1;
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case 4: globalId += this->DimPlus1Squared; break;
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}
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return globalId;
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}
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private:
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vtkm::Id Dimension;
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vtkm::Id DimSquared;
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vtkm::Id DimPlus1Squared;
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};
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class MakeRadiantDataSet
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{
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public:
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typedef vtkm::cont::ArrayHandleUniformPointCoordinates CoordinateArrayHandle;
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typedef vtkm::cont::ArrayHandleTransform<vtkm::Float32,
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vtkm::cont::ArrayHandleUniformPointCoordinates,
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EuclideanNorm> DataArrayHandle;
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typedef vtkm::cont::ArrayHandleTransform<vtkm::Id,
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vtkm::cont::ArrayHandleCounting<vtkm::Id>,
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CubeGridConnectivity> ConnectivityArrayHandle;
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typedef vtkm::cont::CellSetSingleType<
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vtkm::cont::ArrayHandleTransform<vtkm::Id,
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vtkm::cont::ArrayHandleCounting<vtkm::Id>,
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CubeGridConnectivity>::StorageTag> CellSet;
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vtkm::cont::DataSet Make3DRadiantDataSet(vtkm::IdComponent dim=5);
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};
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inline vtkm::cont::DataSet MakeRadiantDataSet::Make3DRadiantDataSet(vtkm::IdComponent dim)
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{
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// create a cube from -.5 to .5 in x,y,z, consisting of <dim> cells on each
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// axis, with point values equal to the Euclidean distance from the origin.
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vtkm::cont::DataSet dataSet;
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typedef vtkm::CellShapeTagHexahedron HexTag;
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typedef vtkm::CellTraits<HexTag> HexTraits;
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typedef vtkm::Vec<vtkm::Float32,3> CoordType;
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const vtkm::IdComponent nCells = dim*dim*dim;
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vtkm::Float32 spacing = vtkm::Float32(1./dim);
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CoordinateArrayHandle coordinates(vtkm::Id3(dim+1,dim+1,dim+1),
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CoordType(-.5,-.5,-.5),
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CoordType(spacing,spacing,spacing));
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DataArrayHandle distanceToOrigin(coordinates);
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DataArrayHandle distanceToOther(coordinates,
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EuclideanNorm(CoordType(1.,1.,1.)));
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ConnectivityArrayHandle connectivity(
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vtkm::cont::ArrayHandleCounting<vtkm::Id>(0,1,nCells*HexTraits::NUM_POINTS),
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CubeGridConnectivity(dim));
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dataSet.AddCoordinateSystem(
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vtkm::cont::CoordinateSystem("coordinates", coordinates));
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//Set point scalar
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dataSet.AddField(
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vtkm::cont::Field("distanceToOrigin", vtkm::cont::Field::ASSOC_POINTS,
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vtkm::cont::DynamicArrayHandle(distanceToOrigin)));
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dataSet.AddField(
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vtkm::cont::Field("distanceToOther", vtkm::cont::Field::ASSOC_POINTS,
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vtkm::cont::DynamicArrayHandle(distanceToOther)));
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CellSet cellSet(HexTag(), "cells");
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cellSet.Fill(connectivity);
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dataSet.AddCellSet(cellSet);
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return dataSet;
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}
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} // anonymous namespace
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void TestMarchingCubesUniformGrid()
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{
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std::cout << "Testing MarchingCubes filter on a uniform grid" << 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::cont::CellSetStructured<3> cellSet;
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dataSet.GetCellSet().CopyTo(cellSet);
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vtkm::cont::ArrayHandle<vtkm::Float32> fieldArray;
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dataSet.GetField("nodevar").GetData().CopyTo(fieldArray);
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vtkm::worklet::MarchingCubes isosurfaceFilter;
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isosurfaceFilter.SetMergeDuplicatePoints(false);
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vtkm::cont::ArrayHandle<vtkm::Vec<vtkm::Float32,3> > verticesArray;
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vtkm::cont::ArrayHandle<vtkm::Vec<vtkm::Float32,3> > normalsArray;
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vtkm::cont::ArrayHandle<vtkm::Float32> scalarsArray;
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isosurfaceFilter.Run(0.5f,
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cellSet,
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dataSet.GetCoordinateSystem(),
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fieldArray,
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verticesArray,
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normalsArray,
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DeviceAdapter());
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isosurfaceFilter.MapFieldOntoIsosurface(fieldArray,
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scalarsArray,
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DeviceAdapter());
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std::cout << "vertices: ";
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vtkm::cont::printSummary_ArrayHandle(verticesArray, std::cout);
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std::cout << std::endl;
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std::cout << "normals: ";
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vtkm::cont::printSummary_ArrayHandle(normalsArray, std::cout);
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std::cout << std::endl;
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std::cout << "scalars: ";
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vtkm::cont::printSummary_ArrayHandle(scalarsArray, std::cout);
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std::cout << std::endl;
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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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void TestMarchingCubesExplicit()
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{
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std::cout << "Testing MarchingCubes filter on explicit data" << std::endl;
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typedef MakeRadiantDataSet DataSetGenerator;
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typedef VTKM_DEFAULT_DEVICE_ADAPTER_TAG DeviceTag;
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typedef vtkm::cont::ArrayHandle<vtkm::Vec<vtkm::Float32,3> > Vec3Handle;
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typedef vtkm::cont::ArrayHandle<vtkm::Float32> DataHandle;
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DataSetGenerator dataSetGenerator;
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vtkm::IdComponent Dimension = 10;
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vtkm::Float32 contourValue = vtkm::Float32(.45);
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vtkm::cont::DataSet dataSet =
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dataSetGenerator.Make3DRadiantDataSet(Dimension);
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DataSetGenerator::CellSet cellSet;
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dataSet.GetCellSet().CopyTo(cellSet);
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vtkm::cont::Field contourField = dataSet.GetField("distanceToOrigin");
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DataSetGenerator::DataArrayHandle contourArray;
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contourField.GetData().CopyTo(contourArray);
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Vec3Handle vertices;
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Vec3Handle normals;
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vtkm::worklet::MarchingCubes marchingCubes;
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marchingCubes.SetMergeDuplicatePoints(false);
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marchingCubes.Run(contourValue,
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cellSet,
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dataSet.GetCoordinateSystem(),
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contourArray,
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vertices,
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normals,
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DeviceTag());
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DataHandle scalars;
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vtkm::cont::Field projectedField = dataSet.GetField("distanceToOther");
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DataSetGenerator::DataArrayHandle projectedArray;
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projectedField.GetData().CopyTo(projectedArray);
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marchingCubes.MapFieldOntoIsosurface(projectedArray,
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scalars,
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DeviceTag());
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std::cout << "vertices: ";
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vtkm::cont::printSummary_ArrayHandle(vertices, std::cout);
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std::cout << std::endl;
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std::cout << "normals: ";
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vtkm::cont::printSummary_ArrayHandle(normals, std::cout);
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std::cout << std::endl;
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std::cout << "scalars: ";
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vtkm::cont::printSummary_ArrayHandle(scalars, std::cout);
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std::cout << std::endl;
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VTKM_TEST_ASSERT(test_equal(vertices.GetNumberOfValues(), 2472),
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"Wrong vertices result for MarchingCubes filter");
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VTKM_TEST_ASSERT(test_equal(normals.GetNumberOfValues(), 2472),
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"Wrong normals result for MarchingCubes filter");
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VTKM_TEST_ASSERT(test_equal(scalars.GetNumberOfValues(), 2472),
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"Wrong scalars result for MarchingCubes filter");
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}
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int UnitTestMarchingCubes(int, char *[])
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{
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return vtkm::cont::testing::Testing::Run(TestMarchingCubesUniformGrid);
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return vtkm::cont::testing::Testing::Run(TestMarchingCubesExplicit);
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}
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