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98 lines
3.3 KiB
98 lines
3.3 KiB
/*=========================================================================
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Program: Visualization Toolkit
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Module: $RCSfile: vtkImplicitSum.h,v $
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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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// .NAME vtkImplicitSum - implicit sum of other implicit functions
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// .SECTION Description
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// vtkImplicitSum produces a linear combination of other implicit functions.
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// The contribution of each function is weighted by a scalar coefficient.
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// The NormalizeByWeight option normalizes the output so that the
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// scalar weights add up to 1. Note that this function gives accurate
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// sums and gradients only if the input functions are linear.
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#ifndef __vtkImplicitSum_h
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#define __vtkImplicitSum_h
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#include "vtkImplicitFunction.h"
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class vtkDoubleArray;
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class vtkImplicitFunctionCollection;
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class VTK_FILTERING_EXPORT vtkImplicitSum : public vtkImplicitFunction
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{
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public:
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static vtkImplicitSum *New();
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vtkTypeRevisionMacro(vtkImplicitSum,vtkImplicitFunction);
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void PrintSelf(ostream& os, vtkIndent indent);
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// Description:
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// Evaluate implicit function using current functions and weights.
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double EvaluateFunction(double x[3]);
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double EvaluateFunction(double x, double y, double z)
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{return this->vtkImplicitFunction::EvaluateFunction(x, y, z); } ;
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// Description:
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// Evaluate gradient of the weighted sum of functions. Input functions
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// should be linear.
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void EvaluateGradient(double x[3], double g[3]);
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// Description:
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// Override modified time retrieval because of object dependencies.
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unsigned long GetMTime();
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// Description:
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// Add another implicit function to the list of functions, along with a
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// weighting factor.
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void AddFunction(vtkImplicitFunction *in, double weight);
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// Description:
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// Add another implicit function to the list of functions, weighting it by
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// a factor of 1.
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void AddFunction(vtkImplicitFunction *in) { this->AddFunction(in, 1.0); }
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// Description:
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// Remove all functions from the list.
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void RemoveAllFunctions();
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// Description:
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// Set the weight (coefficient) of the given function to be weight.
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void SetFunctionWeight(vtkImplicitFunction *f, double weight);
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// Description:
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// When calculating the function and gradient values of the
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// composite function, setting NormalizeByWeight on will divide the
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// final result by the total weight of the component functions.
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// This process does not otherwise normalize the gradient vector.
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// By default, NormalizeByWeight is off.
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vtkSetMacro(NormalizeByWeight, int);
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vtkGetMacro(NormalizeByWeight, int);
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vtkBooleanMacro(NormalizeByWeight, int);
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protected:
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vtkImplicitSum();
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~vtkImplicitSum();
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vtkImplicitFunctionCollection *FunctionList;
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vtkDoubleArray *Weights;
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double TotalWeight;
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void CalculateTotalWeight(void);
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int NormalizeByWeight;
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private:
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vtkImplicitSum(const vtkImplicitSum&); // Not implemented.
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void operator=(const vtkImplicitSum&); // Not implemented.
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};
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#endif
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