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vtk-m2/vtkm/worklet/testing/UnitTestMarchingCubes.cxx
Kenneth Moreland 713cf4228a Make it not possible to create a cell set without specifying num points 
The CellSetExplicit and CellSetSingleType classes have an ivar that
marks the number of points. There were several instances of code
creating cell sets without specifying the number of points. This can be
very bad if subsequent code needs that information.
2017-01-12 13:02:10 -07:00

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//============================================================================
// Copyright (c) Kitware, Inc.
// All rights reserved.
// See LICENSE.txt for details.
// This software is distributed WITHOUT ANY WARRANTY; without even
// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
// PURPOSE. See the above copyright notice for more information.
//
// Copyright 2014 Sandia Corporation.
// Copyright 2014 UT-Battelle, LLC.
// Copyright 2014 Los Alamos National Security.
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
//
// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
// Laboratory (LANL), the U.S. Government retains certain rights in
// this software.
//============================================================================
#include <vtkm/Math.h>
#include <vtkm/cont/ArrayHandleUniformPointCoordinates.h>
#include <vtkm/cont/CellSetSingleType.h>
#include <vtkm/cont/DataSet.h>
#include <vtkm/cont/DynamicArrayHandle.h>
#include <vtkm/cont/testing/Testing.h>
#include <vtkm/worklet/MarchingCubes.h>
#include <vtkm/worklet/DispatcherMapField.h>
namespace {
class TangleField : public vtkm::worklet::WorkletMapField
{
public:
typedef void ControlSignature(FieldIn<IdType> vertexId, FieldOut<Scalar> v);
typedef void ExecutionSignature(_1, _2);
typedef _1 InputDomain;
const vtkm::Id xdim, ydim, zdim;
const vtkm::FloatDefault xmin, ymin, zmin, xmax, ymax, zmax;
const vtkm::Id cellsPerLayer;
VTKM_CONT
TangleField(const vtkm::Id3 dims, const vtkm::FloatDefault mins[3], const vtkm::FloatDefault maxs[3]) : xdim(dims[0]), ydim(dims[1]), zdim(dims[2]),
xmin(mins[0]), ymin(mins[1]), zmin(mins[2]), xmax(maxs[0]), ymax(maxs[1]), zmax(maxs[2]), cellsPerLayer((xdim) * (ydim)) { }
VTKM_EXEC
void operator()(const vtkm::Id &vertexId, vtkm::Float32 &v) const
{
const vtkm::Id x = vertexId % (xdim);
const vtkm::Id y = (vertexId / (xdim)) % (ydim);
const vtkm::Id z = vertexId / cellsPerLayer;
const vtkm::FloatDefault fx = static_cast<vtkm::FloatDefault>(x) / static_cast<vtkm::FloatDefault>(xdim-1);
const vtkm::FloatDefault fy = static_cast<vtkm::FloatDefault>(y) / static_cast<vtkm::FloatDefault>(xdim-1);
const vtkm::FloatDefault fz = static_cast<vtkm::FloatDefault>(z) / static_cast<vtkm::FloatDefault>(xdim-1);
const vtkm::Float32 xx = 3.0f*vtkm::Float32(xmin+(xmax-xmin)*(fx));
const vtkm::Float32 yy = 3.0f*vtkm::Float32(ymin+(ymax-ymin)*(fy));
const vtkm::Float32 zz = 3.0f*vtkm::Float32(zmin+(zmax-zmin)*(fz));
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;
}
};
vtkm::cont::DataSet MakeIsosurfaceTestDataSet(vtkm::Id3 dims)
{
vtkm::cont::DataSet dataSet;
const vtkm::Id3 vdims(dims[0] + 1, dims[1] + 1, dims[2] + 1);
vtkm::FloatDefault mins[3] = {-1.0f, -1.0f, -1.0f};
vtkm::FloatDefault maxs[3] = {1.0f, 1.0f, 1.0f};
vtkm::cont::ArrayHandle<vtkm::Float32> fieldArray;
vtkm::cont::ArrayHandleIndex vertexCountImplicitArray(vdims[0]*vdims[1]*vdims[2]);
vtkm::worklet::DispatcherMapField<TangleField> tangleFieldDispatcher(TangleField(vdims, mins, maxs));
tangleFieldDispatcher.Invoke(vertexCountImplicitArray, fieldArray);
vtkm::Vec<vtkm::FloatDefault,3> origin(0.0f, 0.0f, 0.0f);
vtkm::Vec<vtkm::FloatDefault,3> spacing(
1.0f/static_cast<vtkm::FloatDefault>(dims[0]),
1.0f/static_cast<vtkm::FloatDefault>(dims[2]),
1.0f/static_cast<vtkm::FloatDefault>(dims[1]));
vtkm::cont::ArrayHandleUniformPointCoordinates
coordinates(vdims, origin, spacing);
dataSet.AddCoordinateSystem(
vtkm::cont::CoordinateSystem("coordinates", coordinates));
dataSet.AddField(vtkm::cont::Field("nodevar", vtkm::cont::Field::ASSOC_POINTS, fieldArray));
static const vtkm::IdComponent ndim = 3;
vtkm::cont::CellSetStructured<ndim> cellSet("cells");
cellSet.SetPointDimensions(vdims);
dataSet.AddCellSet(cellSet);
return dataSet;
}
class EuclideanNorm
{
public:
VTKM_EXEC_CONT
EuclideanNorm() : Reference(0.,0.,0.) {}
VTKM_EXEC_CONT
EuclideanNorm(vtkm::Vec<vtkm::Float32,3> reference):Reference(reference) {}
VTKM_EXEC_CONT
vtkm::Float32 operator()(vtkm::Vec<vtkm::Float32,3> v) const
{
vtkm::Vec<vtkm::Float32,3> d(v[0]-this->Reference[0],
v[1]-this->Reference[1],
v[2]-this->Reference[2]);
return vtkm::Magnitude(d);
}
private:
vtkm::Vec<vtkm::Float32,3> Reference;
};
class CubeGridConnectivity
{
public:
VTKM_EXEC_CONT
CubeGridConnectivity() : Dimension(1),
DimSquared(1),
DimPlus1Squared(4) {}
VTKM_EXEC_CONT
CubeGridConnectivity(vtkm::Id dim) : Dimension(dim),
DimSquared(dim*dim),
DimPlus1Squared((dim+1)*(dim+1)) {}
VTKM_EXEC_CONT
vtkm::Id operator()(vtkm::Id vertex) const
{
typedef vtkm::CellShapeTagHexahedron HexTag;
typedef vtkm::CellTraits<HexTag> HexTraits;
vtkm::Id cellId = vertex/HexTraits::NUM_POINTS;
vtkm::Id localId = vertex%HexTraits::NUM_POINTS;
vtkm::Id globalId =
(cellId + cellId/this->Dimension +
(this->Dimension+1)*(cellId/(this->DimSquared)));
switch (localId)
{
case 2: globalId += 1;
case 3: globalId += this->Dimension;
case 1: globalId += 1;
case 0: break;
case 6: globalId += 1;
case 7: globalId += this->Dimension;
case 5: globalId += 1;
case 4: globalId += this->DimPlus1Squared; break;
}
return globalId;
}
private:
vtkm::Id Dimension;
vtkm::Id DimSquared;
vtkm::Id DimPlus1Squared;
};
class MakeRadiantDataSet
{
public:
typedef vtkm::cont::ArrayHandleUniformPointCoordinates CoordinateArrayHandle;
typedef vtkm::cont::ArrayHandleTransform<vtkm::Float32,
vtkm::cont::ArrayHandleUniformPointCoordinates,
EuclideanNorm> DataArrayHandle;
typedef vtkm::cont::ArrayHandleTransform<vtkm::Id,
vtkm::cont::ArrayHandleCounting<vtkm::Id>,
CubeGridConnectivity> ConnectivityArrayHandle;
typedef vtkm::cont::CellSetSingleType<
vtkm::cont::ArrayHandleTransform<vtkm::Id,
vtkm::cont::ArrayHandleCounting<vtkm::Id>,
CubeGridConnectivity>::StorageTag> CellSet;
vtkm::cont::DataSet Make3DRadiantDataSet(vtkm::IdComponent dim=5);
};
inline vtkm::cont::DataSet MakeRadiantDataSet::Make3DRadiantDataSet(vtkm::IdComponent dim)
{
// create a cube from -.5 to .5 in x,y,z, consisting of <dim> cells on each
// axis, with point values equal to the Euclidean distance from the origin.
vtkm::cont::DataSet dataSet;
typedef vtkm::CellShapeTagHexahedron HexTag;
typedef vtkm::CellTraits<HexTag> HexTraits;
typedef vtkm::Vec<vtkm::Float32,3> CoordType;
const vtkm::IdComponent nCells = dim*dim*dim;
vtkm::Float32 spacing = vtkm::Float32(1./dim);
CoordinateArrayHandle coordinates(vtkm::Id3(dim+1,dim+1,dim+1),
CoordType(-.5,-.5,-.5),
CoordType(spacing,spacing,spacing));
DataArrayHandle distanceToOrigin(coordinates);
DataArrayHandle distanceToOther(coordinates,
EuclideanNorm(CoordType(1.,1.,1.)));
ConnectivityArrayHandle connectivity(
vtkm::cont::ArrayHandleCounting<vtkm::Id>(0,1,nCells*HexTraits::NUM_POINTS),
CubeGridConnectivity(dim));
dataSet.AddCoordinateSystem(
vtkm::cont::CoordinateSystem("coordinates", coordinates));
//Set point scalar
dataSet.AddField(
vtkm::cont::Field("distanceToOrigin", vtkm::cont::Field::ASSOC_POINTS,
vtkm::cont::DynamicArrayHandle(distanceToOrigin)));
dataSet.AddField(
vtkm::cont::Field("distanceToOther", vtkm::cont::Field::ASSOC_POINTS,
vtkm::cont::DynamicArrayHandle(distanceToOther)));
CellSet cellSet("cells");
cellSet.Fill((dim+1)*(dim+1)*(dim+1),
HexTag::Id,
HexTraits::NUM_POINTS,
connectivity);
dataSet.AddCellSet(cellSet);
return dataSet;
}
} // anonymous namespace
void TestMarchingCubesUniformGrid()
{
std::cout << "Testing MarchingCubes filter on a uniform grid" << std::endl;
vtkm::Id3 dims(4,4,4);
vtkm::cont::DataSet dataSet = MakeIsosurfaceTestDataSet(dims);
typedef VTKM_DEFAULT_DEVICE_ADAPTER_TAG DeviceAdapter;
vtkm::cont::CellSetStructured<3> cellSet;
dataSet.GetCellSet().CopyTo(cellSet);
vtkm::cont::ArrayHandle<vtkm::Float32> fieldArray;
dataSet.GetField("nodevar").GetData().CopyTo(fieldArray);
vtkm::worklet::MarchingCubes isosurfaceFilter;
isosurfaceFilter.SetMergeDuplicatePoints(false);
vtkm::cont::ArrayHandle<vtkm::Vec<vtkm::Float32,3> > verticesArray;
vtkm::cont::ArrayHandle<vtkm::Vec<vtkm::Float32,3> > normalsArray;
vtkm::cont::ArrayHandle<vtkm::Float32> scalarsArray;
isosurfaceFilter.Run(0.5f,
cellSet,
dataSet.GetCoordinateSystem(),
fieldArray,
verticesArray,
normalsArray,
DeviceAdapter());
isosurfaceFilter.MapFieldOntoIsosurface(fieldArray,
scalarsArray,
DeviceAdapter());
std::cout << "vertices: ";
vtkm::cont::printSummary_ArrayHandle(verticesArray, std::cout);
std::cout << std::endl;
std::cout << "normals: ";
vtkm::cont::printSummary_ArrayHandle(normalsArray, std::cout);
std::cout << std::endl;
std::cout << "scalars: ";
vtkm::cont::printSummary_ArrayHandle(scalarsArray, std::cout);
std::cout << std::endl;
VTKM_TEST_ASSERT(test_equal(verticesArray.GetNumberOfValues(), 480),
"Wrong result for Isosurface filter");
}
void TestMarchingCubesExplicit()
{
std::cout << "Testing MarchingCubes filter on explicit data" << std::endl;
typedef MakeRadiantDataSet DataSetGenerator;
typedef VTKM_DEFAULT_DEVICE_ADAPTER_TAG DeviceTag;
typedef vtkm::cont::ArrayHandle<vtkm::Vec<vtkm::Float32,3> > Vec3Handle;
typedef vtkm::cont::ArrayHandle<vtkm::Float32> DataHandle;
DataSetGenerator dataSetGenerator;
vtkm::IdComponent Dimension = 10;
vtkm::Float32 contourValue = vtkm::Float32(.45);
vtkm::cont::DataSet dataSet =
dataSetGenerator.Make3DRadiantDataSet(Dimension);
DataSetGenerator::CellSet cellSet;
dataSet.GetCellSet().CopyTo(cellSet);
vtkm::cont::Field contourField = dataSet.GetField("distanceToOrigin");
DataSetGenerator::DataArrayHandle contourArray;
contourField.GetData().CopyTo(contourArray);
Vec3Handle vertices;
Vec3Handle normals;
vtkm::worklet::MarchingCubes marchingCubes;
marchingCubes.SetMergeDuplicatePoints(false);
marchingCubes.Run(contourValue,
cellSet,
dataSet.GetCoordinateSystem(),
contourArray,
vertices,
normals,
DeviceTag());
DataHandle scalars;
vtkm::cont::Field projectedField = dataSet.GetField("distanceToOther");
DataSetGenerator::DataArrayHandle projectedArray;
projectedField.GetData().CopyTo(projectedArray);
marchingCubes.MapFieldOntoIsosurface(projectedArray,
scalars,
DeviceTag());
std::cout << "vertices: ";
vtkm::cont::printSummary_ArrayHandle(vertices, std::cout);
std::cout << std::endl;
std::cout << "normals: ";
vtkm::cont::printSummary_ArrayHandle(normals, std::cout);
std::cout << std::endl;
std::cout << "scalars: ";
vtkm::cont::printSummary_ArrayHandle(scalars, std::cout);
std::cout << std::endl;
VTKM_TEST_ASSERT(test_equal(vertices.GetNumberOfValues(), 2472),
"Wrong vertices result for MarchingCubes filter");
VTKM_TEST_ASSERT(test_equal(normals.GetNumberOfValues(), 2472),
"Wrong normals result for MarchingCubes filter");
VTKM_TEST_ASSERT(test_equal(scalars.GetNumberOfValues(), 2472),
"Wrong scalars result for MarchingCubes filter");
}
int UnitTestMarchingCubes(int, char *[])
{
return vtkm::cont::testing::Testing::Run(TestMarchingCubesUniformGrid);
return vtkm::cont::testing::Testing::Run(TestMarchingCubesExplicit);
}
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