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/*=========================================================================
Program: Visualization Toolkit
Module: vtkImplicitTextureCoords.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.
=========================================================================*/
/**
* @class vtkImplicitTextureCoords
* @brief generate 1D, 2D, or 3D texture coordinates based on implicit function(s)
*
* vtkImplicitTextureCoords is a filter to generate 1D, 2D, or 3D texture
* coordinates from one, two, or three implicit functions, respectively.
* In combinations with a vtkBooleanTexture map (or another texture map of
* your own creation), the texture coordinates can be used to highlight
*(via color or intensity) or cut (via transparency) dataset geometry without
* any complex geometric processing. (Note: the texture coordinates are
* referred to as r-s-t coordinates.)
*
* The texture coordinates are automatically normalized to lie between (0,1).
* Thus, no matter what the implicit functions evaluate to, the resulting
* texture coordinates lie between (0,1), with the zero implicit function
* value mapped to the 0.5 texture coordinates value. Depending upon the
* maximum negative/positive implicit function values, the full (0,1) range
* may not be occupied (i.e., the positive/negative ranges are mapped using
* the same scale factor).
*
* A boolean variable InvertTexture is available to flip the texture
* coordinates around 0.5 (value 1.0 becomes 0.0, 0.25->0.75). This is
* equivalent to flipping the texture map (but a whole lot easier).
*
* @warning
* You can use the transformation capabilities of vtkImplicitFunction to
* orient, translate, and scale the implicit functions. Also, the dimension of
* the texture coordinates is implicitly defined by the number of implicit
* functions defined.
*
* @sa
* vtkImplicitFunction vtkTexture vtkBooleanTexture vtkTransformTexture
*/
#ifndef vtkImplicitTextureCoords_h
#define vtkImplicitTextureCoords_h
#include "vtkFiltersTextureModule.h" // For export macro
#include "vtkDataSetAlgorithm.h"
class vtkImplicitFunction;
class VTKFILTERSTEXTURE_EXPORT vtkImplicitTextureCoords : public vtkDataSetAlgorithm
{
public:
vtkTypeMacro(vtkImplicitTextureCoords,vtkDataSetAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent);
/**
* Create object with texture dimension=2 and no r-s-t implicit functions
* defined and FlipTexture turned off.
*/
static vtkImplicitTextureCoords *New();
//@{
/**
* Specify an implicit function to compute the r texture coordinate.
*/
virtual void SetRFunction(vtkImplicitFunction*);
vtkGetObjectMacro(RFunction,vtkImplicitFunction);
//@}
//@{
/**
* Specify an implicit function to compute the s texture coordinate.
*/
virtual void SetSFunction(vtkImplicitFunction*);
vtkGetObjectMacro(SFunction,vtkImplicitFunction);
//@}
//@{
/**
* Specify an implicit function to compute the t texture coordinate.
*/
virtual void SetTFunction(vtkImplicitFunction*);
vtkGetObjectMacro(TFunction,vtkImplicitFunction);
//@}
//@{
/**
* If enabled, this will flip the sense of inside and outside the implicit
* function (i.e., a rotation around the r-s-t=0.5 axis).
*/
vtkSetMacro(FlipTexture,int);
vtkGetMacro(FlipTexture,int);
vtkBooleanMacro(FlipTexture,int);
//@}
protected:
vtkImplicitTextureCoords();
~vtkImplicitTextureCoords();
int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
vtkImplicitFunction *RFunction;
vtkImplicitFunction *SFunction;
vtkImplicitFunction *TFunction;
int FlipTexture;
private:
vtkImplicitTextureCoords(const vtkImplicitTextureCoords&) VTK_DELETE_FUNCTION;
void operator=(const vtkImplicitTextureCoords&) VTK_DELETE_FUNCTION;
};
#endif
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