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/*=========================================================================
Program: Visualization Toolkit
Module: vtkValuePainter.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 vtkValuePainter - painter that renders arrays encoded into
// pixel colors.
// .SECTION Description
// vtkValuePainter renders polygonal geometry where data values
// are encoded into 24 bit integers and send to the screen.
// The pixel colors can then be read and converted back into values later.
//
// .SECTION See Also
// vtkValuePass, vtkValuePasses
#ifndef vtkValuePainter_h
#define vtkValuePainter_h
#include "vtkRenderingOpenGLModule.h" // For export macro
#include "vtkStandardPolyDataPainter.h"
class vtkInformationDoubleVectorKey;
class vtkInformationIntegerKey;
class vtkInformationStringKey;
class VTKRENDERINGOPENGL_EXPORT vtkValuePainter :
public vtkStandardPolyDataPainter
{
public:
static vtkValuePainter* New();
vtkTypeMacro(vtkValuePainter, vtkStandardPolyDataPainter);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Set the array to be drawn. By default point scalars are
// used. Arguments are same as those passed to
// vtkAlgorithm::SetInputArrayToProcess except the first 3 arguments i.e. idx,
// port, connection.
void SetInputArrayToProcess(int fieldAssociation, const char *name);
void SetInputArrayToProcess(int fieldAssociation, int fieldAttributeType);
// Description:
// Set the component (0..numcomponents-1) of the specified array to be drawn.
// If input array is not a multicomponent array or component is otherwise out
// of range the painter uses the 0'th component instead.
void SetInputComponentToProcess(int comp);
// Description:
// Use the provided scalar range instead of the range of the input data
// array.
void SetScalarRange(double min, double max);
// Description:
// Optionally passed down from RenderPass pipeline to
// controls what data array to draw.
static vtkInformationIntegerKey* SCALAR_MODE();
static vtkInformationDoubleVectorKey* SCALAR_RANGE();
static vtkInformationIntegerKey* ARRAY_ID();
static vtkInformationStringKey* ARRAY_NAME();
static vtkInformationIntegerKey* ARRAY_COMPONENT();
// Description:
// Internal convenience method to convert a value to a color
// TODO: make this templated and programmable
static void ValueToColor(double value, double min, double scale,
unsigned char *color);
static void ColorToValue(unsigned char *color, double min, double scale,
double &value);
protected:
vtkValuePainter();
~vtkValuePainter();
// Description:
// overridden to look for informationkeys that specify what array to draw
virtual void ProcessInformation(vtkInformation*);
// Description:
// overridden to draw the chosen array value directly as color
virtual void RenderInternal(vtkRenderer* renderer, vtkActor* actor,
unsigned long typeflags, bool forceCompileOnly);
// Description:
// overridden
// implement drawlines, points, strips
void DrawCells(int mode, vtkCellArray *connectivity,
vtkIdType startCellId, vtkRenderer *renderer);
private:
vtkValuePainter(const vtkValuePainter&); // Not implemented.
void operator=(const vtkValuePainter&); // Not implemented.
class vtkInternals;
vtkInternals *Internals;
};
#endif
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