VAPoR::VolumeCellTraversal Class Reference

Curvilinear grid rendering algorithm. More...

#include <VolumeCellTraversal.h>

Inheritance diagram for VAPoR::VolumeCellTraversal:

Public Member Functions
	VolumeCellTraversal (GLManager *gl, VolumeRenderer *renderer)
	~VolumeCellTraversal ()
virtual bool	RequiresChunkedRendering ()
virtual int	LoadData (const Grid *grid)
virtual ShaderProgram *	GetShader () const
virtual void	SetUniforms (const ShaderProgram *shader) const
virtual float	GuestimateFastModeSpeedupFactor () const
virtual int	CheckHardwareSupport (const Grid *grid) const
Public Member Functions inherited from VAPoR::VolumeRegular
	VolumeRegular (GLManager *gl, VolumeRenderer *renderer)
	~VolumeRegular ()
virtual bool	RequiresChunkedRendering ()
virtual int	LoadData (const Grid *grid)
virtual int	LoadSecondaryData (const Grid *grid)
virtual void	DeleteSecondaryData ()
virtual ShaderProgram *	GetShader () const
virtual void	SetUniforms (const ShaderProgram *shader) const
virtual float	GuestimateFastModeSpeedupFactor () const
virtual int	CheckHardwareSupport (const Grid *grid) const
Public Member Functions inherited from VAPoR::VolumeGLSL
	VolumeGLSL (GLManager *gl, VolumeRenderer *renderer)
	~VolumeGLSL ()
virtual void	SaveDepthBuffer (bool fast)
virtual int	Render (bool fast)
virtual int	LoadData (const Grid *grid)
virtual ShaderProgram *	GetShader () const =0
virtual void	SetUniforms (const ShaderProgram *shader) const =0
virtual void	GetFinalBlendingMode (int *src, int *dst)
Public Member Functions inherited from VAPoR::VolumeAlgorithm
	VolumeAlgorithm (GLManager *gl, VolumeRenderer *renderer)
virtual	~VolumeAlgorithm ()
virtual void	SaveDepthBuffer (bool fast)
virtual int	Render (bool fast)=0
virtual int	LoadData (const Grid *grid)=0
virtual int	LoadSecondaryData (const Grid *grid)=0
virtual void	DeleteSecondaryData ()=0
virtual void	GetFinalBlendingMode (int *src, int *dst)=0
virtual bool	RequiresChunkedRendering ()=0
virtual float	GuestimateFastModeSpeedupFactor () const
virtual int	CheckHardwareSupport (const Grid *grid) const

Static Public Member Functions
static std::string	GetName ()
static Type	GetType ()
Static Public Member Functions inherited from VAPoR::VolumeRegular
static std::string	GetName ()
static Type	GetType ()
Static Public Member Functions inherited from VAPoR::VolumeAlgorithm
static VolumeAlgorithm *	NewAlgorithm (const std::string &name, GLManager *gl, VolumeRenderer *renderer)
static void	Register (VolumeAlgorithmFactory *f)

Protected Member Functions
int	_getHeuristicBBLevels () const
virtual std::string	_addDefinitionsToShader (std::string shaderName) const
Protected Member Functions inherited from VAPoR::VolumeRegular
int	_loadDataDirect (const Grid *grid, Texture3D *dataTexture, Texture3D *missingTexture, bool *hasMissingData)
virtual std::string	_addDefinitionsToShader (std::string shaderName) const
Protected Member Functions inherited from VAPoR::VolumeAlgorithm
VolumeParams *	GetParams () const
ViewpointParams *	GetViewpointParams () const
AnnotationParams *	GetAnnotationParams () const
Transform *	GetDatasetTransform () const
void	GetExtents (glm::vec3 *dataMin, glm::vec3 *dataMax, glm::vec3 *userMin, glm::vec3 *userMax) const

Additional Inherited Members
Public Types inherited from VAPoR::VolumeAlgorithm
enum class	Type { Any , DVR , Iso }
Protected Attributes inherited from VAPoR::VolumeRegular
Texture3D	_data
Texture3D	_missing
bool	_hasMissingData
std::vector< size_t >	_dataDimensions
bool	_hasSecondData
Texture3D	_data2
Texture3D	_missing2
bool	_hasMissingData2
Protected Attributes inherited from VAPoR::VolumeAlgorithm
GLManager *	_glManager

Detailed Description

Curvilinear grid rendering algorithm.

Author

Stanislaw Jaroszynski

Date

Feburary, 2019

Renders a curvilinear grid by traversing through the cells. The c++ code does the following:

1. Loads scalar data
2. Loads the coordinates
3. Generates a bounding box for every border face
4. Groups bounding boxs recursively into a tree, i.e. a bounding box at level n would encapsulate the 4 associated bounding boxes at level n-1

The glsl code does the following:

1. Find the initial border face that the ray intersects with by traversing the tree built on the CPU
2. Loop:
3. Find the exit face of the current cell
4. Render the ray segment from the entrance to the exit
5. Set the current exit face to the new entrance face
6. Goto Loop until the ray exits the volume

Definition at line 32 of file VolumeCellTraversal.h.

Constructor & Destructor Documentation

VolumeCellTraversal()

VAPoR::VolumeCellTraversal::VolumeCellTraversal	(	GLManager *	gl,
		VolumeRenderer *	renderer
	)

~VolumeCellTraversal()

VAPoR::VolumeCellTraversal::~VolumeCellTraversal

(

)

Member Function Documentation

_addDefinitionsToShader()

virtual std::string VAPoR::VolumeCellTraversal::_addDefinitionsToShader ( std::string  shaderName ) const

protectedvirtual

Reimplemented from VAPoR::VolumeRegular.

_getHeuristicBBLevels()

int VAPoR::VolumeCellTraversal::_getHeuristicBBLevels ( ) const

protected

CheckHardwareSupport()

virtual int VAPoR::VolumeCellTraversal::CheckHardwareSupport ( const Grid *  grid ) const

virtual

Reimplemented from VAPoR::VolumeRegular.

GetName()

static std::string VAPoR::VolumeCellTraversal::GetName ( )

inlinestatic

Definition at line 37 of file VolumeCellTraversal.h.

GetShader()

virtual ShaderProgram * VAPoR::VolumeCellTraversal::GetShader ( ) const

virtual

Reimplemented from VAPoR::VolumeRegular.

Reimplemented in VAPoR::VolumeCellTraversalIso.

GetType()

static Type VAPoR::VolumeCellTraversal::GetType ( )

inlinestatic

Definition at line 38 of file VolumeCellTraversal.h.

References VAPoR::VolumeAlgorithm::DVR.

GuestimateFastModeSpeedupFactor()

virtual float VAPoR::VolumeCellTraversal::GuestimateFastModeSpeedupFactor ( ) const

virtual

Reimplemented from VAPoR::VolumeRegular.

LoadData()

virtual int VAPoR::VolumeCellTraversal::LoadData ( const Grid *  grid )

virtual

Reimplemented from VAPoR::VolumeRegular.

RequiresChunkedRendering()

virtual bool VAPoR::VolumeCellTraversal::RequiresChunkedRendering ( )

inlinevirtual

On OSX, some shaders can run for a long time without problems while others will crash if the run too long. It seems to correlate with complexity. Chunked rendering splits the rendering into smaller tasks so they won't crash

Reimplemented from VAPoR::VolumeRegular.

Definition at line 39 of file VolumeCellTraversal.h.

SetUniforms()

virtual void VAPoR::VolumeCellTraversal::SetUniforms ( const ShaderProgram *  shader ) const

virtual

Reimplemented from VAPoR::VolumeRegular.

Reimplemented in VAPoR::VolumeCellTraversalIso.

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The documentation for this class was generated from the following file:

• /Users/pearse/VAPOR/include/vapor/VolumeCellTraversal.h