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143 lines
5.2 KiB
C++
143 lines
5.2 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkQuadraticQuad.h
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm 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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/**
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* @class vtkQuadraticQuad
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* @brief cell represents a parabolic, 8-node isoparametric quad
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*
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* vtkQuadraticQuad is a concrete implementation of vtkNonLinearCell to
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* represent a two-dimensional, 8-node isoparametric parabolic quadrilateral
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* element. The interpolation is the standard finite element, quadratic
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* isoparametric shape function. The cell includes a mid-edge node for each
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* of the four edges of the cell. The ordering of the eight points defining
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* the cell are point ids (0-3,4-7) where ids 0-3 define the four corner
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* vertices of the quad; ids 4-7 define the midedge nodes (0,1), (1,2),
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* (2,3), (3,0).
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*
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* @sa
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* vtkQuadraticEdge vtkQuadraticTriangle vtkQuadraticTetra
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* vtkQuadraticHexahedron vtkQuadraticWedge vtkQuadraticPyramid
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*/
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#ifndef vtkQuadraticQuad_h
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#define vtkQuadraticQuad_h
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#include "vtkCommonDataModelModule.h" // For export macro
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#include "vtkNonLinearCell.h"
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class vtkQuadraticEdge;
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class vtkQuad;
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class vtkDoubleArray;
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class VTKCOMMONDATAMODEL_EXPORT vtkQuadraticQuad : public vtkNonLinearCell
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{
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public:
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static vtkQuadraticQuad* New();
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vtkTypeMacro(vtkQuadraticQuad, vtkNonLinearCell);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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//@{
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/**
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* Implement the vtkCell API. See the vtkCell API for descriptions
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* of these methods.
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*/
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int GetCellType() override { return VTK_QUADRATIC_QUAD; }
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int GetCellDimension() override { return 2; }
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int GetNumberOfEdges() override { return 4; }
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int GetNumberOfFaces() override { return 0; }
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vtkCell* GetEdge(int) override;
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vtkCell* GetFace(int) override { return nullptr; }
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//@}
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int CellBoundary(int subId, const double pcoords[3], vtkIdList* pts) override;
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void Contour(double value, vtkDataArray* cellScalars, vtkIncrementalPointLocator* locator,
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vtkCellArray* verts, vtkCellArray* lines, vtkCellArray* polys, vtkPointData* inPd,
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vtkPointData* outPd, vtkCellData* inCd, vtkIdType cellId, vtkCellData* outCd) override;
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int EvaluatePosition(const double x[3], double closestPoint[3], int& subId, double pcoords[3],
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double& dist2, double weights[]) override;
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void EvaluateLocation(int& subId, const double pcoords[3], double x[3], double* weights) override;
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int Triangulate(int index, vtkIdList* ptIds, vtkPoints* pts) override;
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void Derivatives(
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int subId, const double pcoords[3], const double* values, int dim, double* derivs) override;
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double* GetParametricCoords() override;
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/**
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* Clip this quadratic quad using scalar value provided. Like contouring,
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* except that it cuts the quad to produce linear triangles.
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*/
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void Clip(double value, vtkDataArray* cellScalars, vtkIncrementalPointLocator* locator,
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vtkCellArray* polys, vtkPointData* inPd, vtkPointData* outPd, vtkCellData* inCd,
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vtkIdType cellId, vtkCellData* outCd, int insideOut) override;
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/**
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* Line-edge intersection. Intersection has to occur within [0,1] parametric
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* coordinates and with specified tolerance.
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*/
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int IntersectWithLine(const double p1[3], const double p2[3], double tol, double& t, double x[3],
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double pcoords[3], int& subId) override;
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/**
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* Return the center of the pyramid in parametric coordinates.
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*/
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int GetParametricCenter(double pcoords[3]) override;
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static void InterpolationFunctions(const double pcoords[3], double weights[8]);
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static void InterpolationDerivs(const double pcoords[3], double derivs[16]);
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//@{
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/**
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* Compute the interpolation functions/derivatives
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* (aka shape functions/derivatives)
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*/
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void InterpolateFunctions(const double pcoords[3], double weights[8]) override
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{
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vtkQuadraticQuad::InterpolationFunctions(pcoords, weights);
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}
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void InterpolateDerivs(const double pcoords[3], double derivs[16]) override
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{
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vtkQuadraticQuad::InterpolationDerivs(pcoords, derivs);
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}
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//@}
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protected:
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vtkQuadraticQuad();
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~vtkQuadraticQuad() override;
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vtkQuadraticEdge* Edge;
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vtkQuad* Quad;
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vtkPointData* PointData;
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vtkDoubleArray* Scalars;
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// In order to achieve some functionality we introduce a fake center point
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// which require to have some extra functionalities compare to other non-linar
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// cells
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vtkCellData* CellData;
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vtkDoubleArray* CellScalars;
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void Subdivide(double* weights);
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void InterpolateAttributes(
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vtkPointData* inPd, vtkCellData* inCd, vtkIdType cellId, vtkDataArray* cellScalars);
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private:
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vtkQuadraticQuad(const vtkQuadraticQuad&) = delete;
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void operator=(const vtkQuadraticQuad&) = delete;
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};
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//----------------------------------------------------------------------------
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inline int vtkQuadraticQuad::GetParametricCenter(double pcoords[3])
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{
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pcoords[0] = pcoords[1] = 0.5;
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pcoords[2] = 0.;
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return 0;
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}
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#endif
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