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/*=========================================================================
Program: Visualization Toolkit
Module: vtkOpenGLProjectedTetrahedraMapper.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.
=========================================================================*/
/*
* Copyright 2003 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.
*/
/**
* @class vtkOpenGLProjectedTetrahedraMapper
* @brief OpenGL implementation of PT
*
* @bug
* This mapper relies highly on the implementation of the OpenGL pipeline.
* A typical hardware driver has lots of options and some settings can
* cause this mapper to produce artifacts.
*
*/
#ifndef vtkOpenGLProjectedTetrahedraMapper_h
#define vtkOpenGLProjectedTetrahedraMapper_h
#include "vtkNew.h" // for ivars
#include "vtkOpenGLHelper.h" // used for ivars
#include "vtkProjectedTetrahedraMapper.h"
#include "vtkRenderingVolumeOpenGL2Module.h" // For export macro
VTK_ABI_NAMESPACE_BEGIN
class vtkFloatArray;
class vtkMatrix4x4;
class vtkOpenGLFramebufferObject;
class vtkOpenGLRenderWindow;
class vtkOpenGLVertexBufferObject;
class vtkRenderWindow;
class vtkUnsignedCharArray;
class vtkVisibilitySort;
class VTKRENDERINGVOLUMEOPENGL2_EXPORT vtkOpenGLProjectedTetrahedraMapper
: public vtkProjectedTetrahedraMapper
{
public:
vtkTypeMacro(vtkOpenGLProjectedTetrahedraMapper, vtkProjectedTetrahedraMapper);
static vtkOpenGLProjectedTetrahedraMapper* New();
void PrintSelf(ostream& os, vtkIndent indent) override;
void ReleaseGraphicsResources(vtkWindow* window) override;
void Render(vtkRenderer* renderer, vtkVolume* volume) override;
///@{
/**
* Set/get whether to use floating-point rendering buffers rather
* than the default.
*/
vtkSetMacro(UseFloatingPointFrameBuffer, bool);
vtkGetMacro(UseFloatingPointFrameBuffer, bool);
vtkBooleanMacro(UseFloatingPointFrameBuffer, bool);
///@}
/**
* Return true if the rendering context provides
* the nececessary functionality to use this class.
*/
bool IsSupported(vtkRenderWindow* context) override;
protected:
vtkOpenGLProjectedTetrahedraMapper();
~vtkOpenGLProjectedTetrahedraMapper() override;
void Initialize(vtkRenderer* ren);
bool Initialized;
int CurrentFBOWidth, CurrentFBOHeight;
bool AllocateFOResources(vtkRenderer* ren);
bool CanDoFloatingPointFrameBuffer;
bool FloatingPointFrameBufferResourcesAllocated;
bool UseFloatingPointFrameBuffer;
bool HasHardwareSupport;
vtkUnsignedCharArray* Colors;
int UsingCellColors;
vtkFloatArray* TransformedPoints;
float MaxCellSize;
vtkTimeStamp InputAnalyzedTime;
vtkTimeStamp ColorsMappedTime;
// The VBO and its layout.
vtkOpenGLVertexBufferObject* VBO;
// Structures for the various cell types we render.
vtkOpenGLHelper Tris;
int GaveError;
vtkVolumeProperty* LastProperty;
vtkOpenGLFramebufferObject* Framebuffer;
float* SqrtTable;
float SqrtTableBias;
virtual void ProjectTetrahedra(
vtkRenderer* renderer, vtkVolume* volume, vtkOpenGLRenderWindow* window);
float GetCorrectedDepth(float x, float y, float z1, float z2,
const float inverse_projection_mat[16], int use_linear_depth_correction,
float linear_depth_correction);
/**
* Update progress ensuring that OpenGL state is saved and restored before
* invoking progress.
*/
void GLSafeUpdateProgress(double value, vtkOpenGLRenderWindow* window);
vtkNew<vtkMatrix4x4> tmpMat;
vtkNew<vtkMatrix4x4> tmpMat2;
private:
vtkOpenGLProjectedTetrahedraMapper(const vtkOpenGLProjectedTetrahedraMapper&) = delete;
void operator=(const vtkOpenGLProjectedTetrahedraMapper&) = delete;
class vtkInternals;
vtkInternals* Internals;
};
VTK_ABI_NAMESPACE_END
#endif
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