You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
98 lines
3.9 KiB
98 lines
3.9 KiB
/*=========================================================================
|
|
|
|
Program: Visualization Toolkit
|
|
Module: $RCSfile: vtkUnstructuredGridLinearRayIntegrator.h,v $
|
|
|
|
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.
|
|
|
|
=========================================================================*/
|
|
|
|
/*
|
|
* Copyright 2004 Sandia Corporation.
|
|
* Under the terms of Contract DE-AC04-94AL85000, there is a non-exclusive
|
|
* license for use of this work by or on behalf of the
|
|
* U.S. Government. Redistribution and use in source and binary forms, with
|
|
* or without modification, are permitted provided that this Notice and any
|
|
* statement of authorship are reproduced on all copies.
|
|
*/
|
|
|
|
// .NAME vtkUnstructuredGridLinearRayIntegrator - performs piecewise linear ray integration.
|
|
//
|
|
// .SECTION Description
|
|
//
|
|
// vtkUnstructuredGridLinearRayIntegrator performs piecewise linear ray
|
|
// integration. Considering that transfer functions in VTK are piecewise
|
|
// linear, this class should give the "correct" integration under most
|
|
// circumstances. However, the computations performed are fairly hefty and
|
|
// should, for the most part, only be used as a benchmark for other, faster
|
|
// methods.
|
|
//
|
|
// .SECTION See Also
|
|
// vtkUnstructuredGridPartialPreIntegration
|
|
//
|
|
|
|
#ifndef __vtkUnstructuredGridLinearRayIntegrator_h
|
|
#define __vtkUnstructuredGridLinearRayIntegrator_h
|
|
|
|
#include "vtkUnstructuredGridVolumeRayIntegrator.h"
|
|
|
|
class vtkLinearRayIntegratorTransferFunction;
|
|
class vtkVolumeProperty;
|
|
|
|
class VTK_VOLUMERENDERING_EXPORT vtkUnstructuredGridLinearRayIntegrator : public vtkUnstructuredGridVolumeRayIntegrator
|
|
{
|
|
public:
|
|
vtkTypeRevisionMacro(vtkUnstructuredGridLinearRayIntegrator,
|
|
vtkUnstructuredGridVolumeRayIntegrator);
|
|
static vtkUnstructuredGridLinearRayIntegrator *New();
|
|
virtual void PrintSelf(ostream &os, vtkIndent indent);
|
|
|
|
virtual void Initialize(vtkVolume *volume, vtkDataArray *scalars);
|
|
|
|
virtual void Integrate(vtkDoubleArray *intersectionLengths,
|
|
vtkDataArray *nearIntersections,
|
|
vtkDataArray *farIntersections,
|
|
float color[4]);
|
|
|
|
// Description:
|
|
// Integrates a single ray segment. \c color is blended with the result
|
|
// (with \c color in front). The result is written back into \c color.
|
|
static void IntegrateRay(double length,
|
|
double intensity_front, double attenuation_front,
|
|
double intensity_back, double attenuation_back,
|
|
float color[4]);
|
|
static void IntegrateRay(double length,
|
|
const double color_front[3],
|
|
double attenuation_front,
|
|
const double color_back[3],
|
|
double attenuation_back,
|
|
float color[4]);
|
|
|
|
// Description:
|
|
// Computes Psi (as defined by Moreland and Angel, "A Fast High Accuracy
|
|
// Volume Renderer for Unstructured Data").
|
|
static float Psi(float length,
|
|
float attenuation_front, float attenuation_back);
|
|
|
|
protected:
|
|
vtkUnstructuredGridLinearRayIntegrator();
|
|
~vtkUnstructuredGridLinearRayIntegrator();
|
|
|
|
vtkVolumeProperty *Property;
|
|
|
|
vtkLinearRayIntegratorTransferFunction *TransferFunctions;
|
|
vtkTimeStamp TransferFunctionsModified;
|
|
int NumIndependentComponents;
|
|
|
|
private:
|
|
vtkUnstructuredGridLinearRayIntegrator(const vtkUnstructuredGridLinearRayIntegrator&); // Not implemented.
|
|
void operator=(const vtkUnstructuredGridLinearRayIntegrator&); // Not implemented.
|
|
};
|
|
|
|
#endif //__vtkUnstructuredGridLinearRayIntegrator_h
|
|
|