DtWeatherFogFroxelGrid uses a frustum voxel grid to compute density/translucency at voxel locations based on fog volumes. The density/translucency values are computed using a compute shader and stored in a 3d texture that can be used by particle systems to modify their translucency and fade into the fog.

Inheritance diagram for makVrv::DtWeatherFogFroxelGrid:

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Classes
class	FroxelGenerationJob

struct	Volume

Public Member Functions
virtual	~DtWeatherFogFroxelGrid ()

	DtWeatherFogFroxelGrid ()=delete

	DtWeatherFogFroxelGrid (const DtWeatherFogFroxelGrid &)=delete

DtWeatherFogFroxelGrid &	operator= (const DtWeatherFogFroxelGrid &)=delete

virtual void	initialize ()

virtual void	releaseGLObjects (osg::State *state)

virtual bool	bindFogFroxelTexture (const int unit, const unsigned int renderContextId)

virtual void	resetVolumes ()

virtual void	addVolume (const osg::Vec3d &position, const osg::Matrixf &rotation, const float width, const float length, const float height, const float density)

virtual void	updateForView (const osg::Matrixf &projMat, const osg::Matrixd &viewMat)

virtual float	maxGridDistance () const

Public Member Functions inherited from makVrv::DtVirtualBaseClass
	DtVirtualBaseClass ()

virtual	~DtVirtualBaseClass ()

Public Attributes
friend	DtWeatherFogFroxelGridCreator

Protected Member Functions
	DtWeatherFogFroxelGrid (DtDe &de)

virtual FroxelGenerationJob *	createJob ()

virtual void	slot_reloadShaders ()

Protected Attributes
DtDe &	myDe

DtOsgRenderer &	myOsgRenderer

GLuint	myVoxelTextureId

osg::ref_ptr< osg::Texture3D >	myVoxelTexture

osg::ref_ptr< FroxelGenerationJob >	myFroxelGenerationJob

osg::Matrixf	myProjMat

osg::Matrixd	myViewMat

std::vector< Volume * >	myVolumes

int	myActiveVolumes

float	myMaxGridDistance

Constructor & Destructor Documentation

virtual makVrv::DtWeatherFogFroxelGrid::~DtWeatherFogFroxelGrid ( )

virtual

DTOR.

makVrv::DtWeatherFogFroxelGrid::DtWeatherFogFroxelGrid ( )

delete

unimplemented private default constructor

makVrv::DtWeatherFogFroxelGrid::DtWeatherFogFroxelGrid ( const DtWeatherFogFroxelGrid & )

delete

Copy Constructor not implemented � Copy not allowed.

makVrv::DtWeatherFogFroxelGrid::DtWeatherFogFroxelGrid ( DtDe & de )

protected

CTOR. only creator can create.

Member Function Documentation

DtWeatherFogFroxelGrid& makVrv::DtWeatherFogFroxelGrid::operator= ( const DtWeatherFogFroxelGrid & )

delete

Assignment Operator not implemented � Copy not allowed.

virtual void makVrv::DtWeatherFogFroxelGrid::initialize ( )

virtual

initializes or reinitializes the object. Called at startup and whenever

virtual void makVrv::DtWeatherFogFroxelGrid::releaseGLObjects ( osg::State * state )

virtual

handle destruction of graphics objects when the context is destroyed

virtual bool makVrv::DtWeatherFogFroxelGrid::bindFogFroxelTexture	(	const int	unit,
		const unsigned int	renderContextId
	)

virtual

Binds the fog froxel texture object to the given texture unit for the given render context. Returns true if the froxel texture is enabled.

Parameters

unit	The texture unit to bind to.
renderContextId	The current render context used for drawing.

virtual void makVrv::DtWeatherFogFroxelGrid::resetVolumes ( )

virtual

Resets all volumes. Typically this would be called for each normal pass camera render.

virtual void makVrv::DtWeatherFogFroxelGrid::addVolume	(	const osg::Vec3d &	position,
		const osg::Matrixf &	rotation,
		const float	width,
		const float	length,
		const float	height,
		const float	density
	)

virtual

Adds the given volume to be considered for density calculations. Typically this would be called for each normal pass camera render to add active (non-culled) volumes.

Parameters

position	Volume world position.
rotation	Volume world rotation.
width	Volume width dimension.
length	Volume length dimension.
height	Volume height dimension.
density	Volume density (exp falloff).

virtual void makVrv::DtWeatherFogFroxelGrid::updateForView	(	const osg::Matrixf &	projMat,
		const osg::Matrixd &	viewMat
	)

virtual

Updates the computed camera transforms.

virtual float makVrv::DtWeatherFogFroxelGrid::maxGridDistance ( ) const

virtual

Returns the maximum froxel grid distance out from the camera view.

virtual FroxelGenerationJob* makVrv::DtWeatherFogFroxelGrid::createJob ( )

protectedvirtual

wrapper around the job creation to make it easy to override later.

virtual void makVrv::DtWeatherFogFroxelGrid::slot_reloadShaders ( )

protectedvirtual

reloads the compute shader

Member Data Documentation

friend makVrv::DtWeatherFogFroxelGrid::DtWeatherFogFroxelGridCreator

DtDe& makVrv::DtWeatherFogFroxelGrid::myDe

protected

DtOsgRenderer& makVrv::DtWeatherFogFroxelGrid::myOsgRenderer

protected

GLuint makVrv::DtWeatherFogFroxelGrid::myVoxelTextureId

protected

osg::ref_ptr<osg::Texture3D> makVrv::DtWeatherFogFroxelGrid::myVoxelTexture

protected

osg::ref_ptr<FroxelGenerationJob> makVrv::DtWeatherFogFroxelGrid::myFroxelGenerationJob

protected

osg::Matrixf makVrv::DtWeatherFogFroxelGrid::myProjMat

protected

osg::Matrixd makVrv::DtWeatherFogFroxelGrid::myViewMat

protected

std::vector<Volume*> makVrv::DtWeatherFogFroxelGrid::myVolumes

protected

int makVrv::DtWeatherFogFroxelGrid::myActiveVolumes

protected

float makVrv::DtWeatherFogFroxelGrid::myMaxGridDistance

protected

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

/data/exports/nrhent7-1/nightly/docs/vrForces.vrf5-0-branch/include/vrvOsg/DtWeatherFogFroxelGrid.h

Classes

Public Member Functions

Public Attributes

Protected Member Functions

Protected Attributes

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation