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150 lines
4.4 KiB
C++
150 lines
4.4 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkImplicitProjectOnPlaneDistance.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 vtkImplicitProjectOnPlaneDistance
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*
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* This class recieve a plannar polygon as input. Given a point, it can
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* evaluate the L0 or L2 norm between the projection of this point on the plan
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* of the polygon and the polygon itself.
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*
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* An interesting use of this class is to enable the L0 norm and evaluate the
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* "projected distance" between every vertex of a mesh and the given plannar polygon.
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* As a reslut, all the vertices that project onto the polygon will corresond to the value 0
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* and ohter ones will recieve the value 1.
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* From there, we can use a clip to keep only the part of the mesh "below" the polygon.
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*
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* TLDR: This filter allows to clip using the extrusion of any plannar polygon.
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*/
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#ifndef vtkImplicitProjectOnPlaneDistance_h
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#define vtkImplicitProjectOnPlaneDistance_h
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#include "vtkImplicitFunction.h"
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#include "vtkAbstractCellLocator.h" // User defined cellLocator
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#include "vtkFiltersCoreModule.h" // For export macro
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#include "vtkSmartPointer.h" // It has vtkSmartPointer fields
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class vtkGenericCell;
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class vtkPolyData;
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class vtkPlane;
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class VTKFILTERSCORE_EXPORT vtkImplicitProjectOnPlaneDistance : public vtkImplicitFunction
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{
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public:
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enum class NormType
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{
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L0 = 0,
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L2 = 2
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};
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static vtkImplicitProjectOnPlaneDistance* New();
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vtkTypeMacro(vtkImplicitProjectOnPlaneDistance, vtkImplicitFunction);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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/**
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* Return the MTime also considering the Input dependency.
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*/
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vtkMTimeType GetMTime() override;
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/**
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* Project x onto the plane defined by the Input polydata and evalute the
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* distance to the geometry defined by the Input polydata.
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*/
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using vtkImplicitFunction::EvaluateFunction;
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double EvaluateFunction(double x[3]) override;
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/**
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* Evaluate function gradient of nearest triangle to point x[3].
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* WARNING: not implemented as it is of no use in this context.
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*/
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void EvaluateGradient(double x[3], double g[3]) override;
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/**
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* Set the input vtkPolyData used for the implicit function
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* evaluation. This polydata needs to be planar.
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*/
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void SetInput(vtkPolyData* input);
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//@{
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/**
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* Set/get the tolerance usued for the locator.
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* Default is 0.01.
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*/
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vtkGetMacro(Tolerance, double);
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vtkSetMacro(Tolerance, double);
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//@}
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//@{
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/**
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* Set the norm to use:
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* L0: 0 when the projection is inside the input polygon, 1 otherwise
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* L2: Euclidean distance between the projection and the polygon (default)
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*/
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NormType GetNorm() const { return Norm; }
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void SetNorm(NormType n)
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{
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Norm = n;
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Modified();
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}
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#ifndef __VTK_WRAP_JAVA__
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// The Java wrappers cannot resolve this signature from the one above,
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// see https://gitlab.kitware.com/vtk/vtk/issues/17744
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void SetNorm(int n)
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{
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Norm = static_cast<NormType>(n);
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Modified();
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}
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#endif
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//@}
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//@{
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/**
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* Set/get the Locator used by to compute the distance.
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* A vtkStaticCellLocator is provided by default if
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* none is given by the user.
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*/
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vtkGetSmartPointerMacro(Locator, vtkAbstractCellLocator);
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vtkSetSmartPointerMacro(Locator, vtkAbstractCellLocator);
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//@}
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protected:
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vtkImplicitProjectOnPlaneDistance();
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~vtkImplicitProjectOnPlaneDistance() override = default;
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/**
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* Create a default locator (vtkStaticCellLocator).
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* Used to create one when none is specified by the user.
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*/
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void CreateDefaultLocator(void);
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double Tolerance;
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NormType Norm;
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vtkSmartPointer<vtkPolyData> Input;
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vtkSmartPointer<vtkAbstractCellLocator> Locator;
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vtkSmartPointer<vtkPlane> ProjectionPlane;
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// Stored here to avoid multiple allocation / dealloction
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vtkSmartPointer<vtkGenericCell> UnusedCell;
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double Bounds[6];
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private:
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vtkImplicitProjectOnPlaneDistance(const vtkImplicitProjectOnPlaneDistance&) = delete;
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void operator=(const vtkImplicitProjectOnPlaneDistance&) = delete;
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};
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#endif
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