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/*=========================================================================
Program: Visualization Toolkit
Module: vtkImplicitBoolean.h
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
// .NAME vtkImplicitBoolean - implicit function consisting of boolean combinations of implicit functions
// .SECTION Description
// vtkImplicitBoolean is an implicit function consisting of boolean
// combinations of implicit functions. The class has a list of functions
// (FunctionList) that are combined according to a specified operator
// (VTK_UNION or VTK_INTERSECTION or VTK_DIFFERENCE). You can use nested
// combinations of vtkImplicitFunction's (and/or vtkImplicitBoolean) to create
// elaborate implicit functions. vtkImplicitBoolean is a concrete
// implementation of vtkImplicitFunction.
//
// The operators work as follows. The VTK_UNION operator takes the minimum
// value of all implicit functions. The VTK_INTERSECTION operator takes the
// maximum value of all implicit functions. The VTK_DIFFERENCE operator
// subtracts the 2nd through last implicit functions from the first. The
// VTK_UNION_OF_MAGNITUDES takes the minimum absolute value of the
// implicit functions.
#ifndef __vtkImplicitBoolean_h
#define __vtkImplicitBoolean_h
#include "vtkImplicitFunction.h"
class vtkImplicitFunctionCollection;
#define VTK_UNION 0
#define VTK_INTERSECTION 1
#define VTK_DIFFERENCE 2
#define VTK_UNION_OF_MAGNITUDES 3
class VTK_FILTERING_EXPORT vtkImplicitBoolean : public vtkImplicitFunction
{
public:
vtkTypeMacro(vtkImplicitBoolean,vtkImplicitFunction);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Default boolean method is union.
static vtkImplicitBoolean *New();
// Description:
// Evaluate boolean combinations of implicit function using current operator.
double EvaluateFunction(double x[3]);
double EvaluateFunction(double x, double y, double z)
{return this->vtkImplicitFunction::EvaluateFunction(x, y, z); } ;
// Description:
// Evaluate gradient of boolean combination.
void EvaluateGradient(double x[3], double g[3]);
// Description:
// Override modified time retrieval because of object dependencies.
unsigned long GetMTime();
// Description:
// Add another implicit function to the list of functions.
void AddFunction(vtkImplicitFunction *in);
// Description:
// Remove a function from the list of implicit functions to boolean.
void RemoveFunction(vtkImplicitFunction *in);
// Description:
// Return the collection of implicit functions.
vtkImplicitFunctionCollection *GetFunction() {return this->FunctionList;};
// Description:
// Specify the type of boolean operation.
vtkSetClampMacro(OperationType,int,VTK_UNION,VTK_UNION_OF_MAGNITUDES);
vtkGetMacro(OperationType,int);
void SetOperationTypeToUnion()
{this->SetOperationType(VTK_UNION);};
void SetOperationTypeToIntersection()
{this->SetOperationType(VTK_INTERSECTION);};
void SetOperationTypeToDifference()
{this->SetOperationType(VTK_DIFFERENCE);};
void SetOperationTypeToUnionOfMagnitudes()
{this->SetOperationType(VTK_UNION_OF_MAGNITUDES);};
const char *GetOperationTypeAsString();
protected:
vtkImplicitBoolean();
~vtkImplicitBoolean();
vtkImplicitFunctionCollection *FunctionList;
int OperationType;
private:
vtkImplicitBoolean(const vtkImplicitBoolean&); // Not implemented.
void operator=(const vtkImplicitBoolean&); // Not implemented.
};
// Description:
// Return the boolean operation type as a descriptive character string.
inline const char *vtkImplicitBoolean::GetOperationTypeAsString(void)
{
if ( this->OperationType == VTK_UNION )
{
return "Union";
}
else if ( this->OperationType == VTK_INTERSECTION )
{
return "Intersection";
}
else if ( this->OperationType == VTK_DIFFERENCE )
{
return "Difference";
}
else
{
return "UnionOfMagnitudes";
}
}
#endif
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