96 lines
2.4 KiB
C++
96 lines
2.4 KiB
C++
#ifndef vtk_m_cont_RegularConnectivity_h
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#define vtk_m_cont_RegularConnectivity_h
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#include <vtkm/CellType.h>
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#include <vtkm/cont/ArrayHandle.h>
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#include <vtkm/cont/Field.h>
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#include <vtkm/cont/DynamicArrayHandle.h>
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#include <vtkm/cont/DeviceAdapterAlgorithm.h>
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namespace vtkm {
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namespace cont {
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class RegularConnectivity
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{
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public:
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void SetNodeDimension(int node_i, int node_j, int node_k)
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{
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cellDims[0] = node_i-1;
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cellDims[1] = node_j-1;
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cellDims[2] = node_k-1;
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nodeDims[0] = node_i;
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nodeDims[1] = node_j;
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nodeDims[2] = node_k;
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}
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vtkm::Id GetNumberOfElements()
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{
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return cellDims[0]*cellDims[1]*cellDims[2];
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}
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vtkm::Id GetNumberOfIndices(vtkm::Id)
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{
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return 8;
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}
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vtkm::Id GetElementShapeType(vtkm::Id)
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{
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return VTKM_VOXEL;
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}
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template <vtkm::IdComponent ItemTupleLength>
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void GetIndices(vtkm::Id index, vtkm::Vec<vtkm::Id,ItemTupleLength> &ids)
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{
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int i,j,k;
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CalculateLogicalCellIndices(index, i,j,k);
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///\todo: assert ItemTupleLength >= 8, or return early?
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ids[0] = CalculateNodeIndex(i, j, k);
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if (ItemTupleLength <= 1) return;
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ids[1] = ids[0] + 1;
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if (ItemTupleLength <= 2) return;
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ids[2] = ids[0] + nodeDims[0];
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if (ItemTupleLength <= 3) return;
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ids[3] = ids[2] + 1;
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if (ItemTupleLength <= 4) return;
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ids[4] = ids[0] + nodeDims[0]*nodeDims[1];
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if (ItemTupleLength <= 5) return;
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ids[5] = ids[4] + 1;
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if (ItemTupleLength <= 6) return;
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ids[6] = ids[4] + nodeDims[0];
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if (ItemTupleLength <= 7) return;
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ids[7] = ids[6] + 1;
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}
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private:
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int cellDims[3];
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int nodeDims[3];
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int CalculateCellIndex(int i, int j, int k)
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{
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return (k * cellDims[1] + j) * cellDims[0] + i;
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}
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int CalculateNodeIndex(int i, int j, int k)
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{
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return (k * nodeDims[1] + j) * nodeDims[0] + i;
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}
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void CalculateLogicalCellIndices(int index, int &i, int &j, int &k)
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{
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int cellDims01 = cellDims[0] * cellDims[1];
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k = index / cellDims01;
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int indexij = index % cellDims01;
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j = indexij / cellDims[0];
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i = indexij % cellDims[0];
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}
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void CalculateLogicalNodeIndices(int index, int &i, int &j, int &k)
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{
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int nodeDims01 = nodeDims[0] * nodeDims[1];
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k = index / nodeDims01;
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int indexij = index % nodeDims01;
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j = indexij / nodeDims[0];
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i = indexij % nodeDims[0];
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}
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};
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//TODO:
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//Add specialized 1D and 2D versions.
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}
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} // namespace vtkm::cont
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#endif //vtk_m_cont_RegularConnectivity_h
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