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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.
=========================================================================*/
// .NAME vtkImplicitTextureCoords - generate 1D, 2D, or 3D texture coordinates based on implicit function(s)
// .SECTION Description
// 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).
// .SECTION Caveats
// 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.
// .SECTION See Also
// vtkImplicitFunction vtkTexture vtkBooleanTexture vtkTransformTexture
#ifndef __vtkImplicitTextureCoords_h
#define __vtkImplicitTextureCoords_h
#include "vtkDataSetAlgorithm.h"
class vtkImplicitFunction;
class VTK_GRAPHICS_EXPORT vtkImplicitTextureCoords : public vtkDataSetAlgorithm
{
public:
vtkTypeMacro(vtkImplicitTextureCoords,vtkDataSetAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Create object with texture dimension=2 and no r-s-t implicit functions
// defined and FlipTexture turned off.
static vtkImplicitTextureCoords *New();
// Description:
// Specify an implicit function to compute the r texture coordinate.
virtual void SetRFunction(vtkImplicitFunction*);
vtkGetObjectMacro(RFunction,vtkImplicitFunction);
// Description:
// Specify an implicit function to compute the s texture coordinate.
virtual void SetSFunction(vtkImplicitFunction*);
vtkGetObjectMacro(SFunction,vtkImplicitFunction);
// Description:
// Specify an implicit function to compute the t texture coordinate.
virtual void SetTFunction(vtkImplicitFunction*);
vtkGetObjectMacro(TFunction,vtkImplicitFunction);
// Description:
// 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&); // Not implemented.
void operator=(const vtkImplicitTextureCoords&); // Not implemented.
};
#endif
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