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100 lines
2.5 KiB
C
100 lines
2.5 KiB
C
3 weeks ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkImplicitHalo.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 vtkImplicitHalo
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* @brief implicit function for an halo
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*
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* vtkImplicitHalo evaluates to 1.0 for each position in the sphere of a
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* given center and radius Radius*(1-FadeOut). It evaluates to 0.0 for each
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* position out the sphere of a given Center and radius Radius. It fades out
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* linearly from 1.0 to 0.0 for points in a radius from Radius*(1-FadeOut) to
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* Radius.
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* vtkImplicitHalo is a concrete implementation of vtkImplicitFunction.
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* It is useful as an input to
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* vtkSampleFunction to generate an 2D image of an halo. It is used this way by
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* vtkShadowMapPass.
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* @warning
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* It does not implement the gradient.
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*/
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#ifndef vtkImplicitHalo_h
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#define vtkImplicitHalo_h
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#include "vtkCommonDataModelModule.h" // For export macro
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#include "vtkImplicitFunction.h"
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class VTKCOMMONDATAMODEL_EXPORT vtkImplicitHalo : public vtkImplicitFunction
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{
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public:
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/**
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* Center=(0.0,0.0,0.0), Radius=1.0, FadeOut=0.01
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*/
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static vtkImplicitHalo* New();
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vtkTypeMacro(vtkImplicitHalo, vtkImplicitFunction);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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//@{
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/**
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* Evaluate the equation.
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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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/**
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* Evaluate normal. Not implemented.
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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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/**
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* Radius of the sphere.
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*/
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vtkSetMacro(Radius, double);
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vtkGetMacro(Radius, double);
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//@}
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//@{
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/**
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* Center of the sphere.
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*/
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vtkSetVector3Macro(Center, double);
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vtkGetVector3Macro(Center, double);
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//@}
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//@{
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/**
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* FadeOut ratio. Valid values are between 0.0 and 1.0.
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*/
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vtkSetMacro(FadeOut, double);
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vtkGetMacro(FadeOut, double);
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//@}
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protected:
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vtkImplicitHalo();
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~vtkImplicitHalo() override;
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double Radius;
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double Center[3];
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double FadeOut;
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private:
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vtkImplicitHalo(const vtkImplicitHalo&) = delete;
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void operator=(const vtkImplicitHalo&) = delete;
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};
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#endif
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