Used by the weather system to define a rectangular grid of points. The points can be clamped to the terrain surface for use in constraining weather effects to the terrain. The grid can be thought of as a crude surface height map. The height map has a rectangular bounds that is divided evenly by a rectangular grid.

Optionally, each grid point height can be packed with a blending value into a single unsinged int for better shader memory use.

The owner of this object should call simulationUpdate() to update clamping.

Inheritance diagram for makVrv::DtWeatherSurfaceGrid:

[legend]

Public Member Functions
	DtWeatherSurfaceGrid (makVrv::DtDe &de)

virtual	~DtWeatherSurfaceGrid ()

virtual void	setBounds (float boundsX, float boundsY)

virtual void	setGridSize (int sizeX, int sizeY)

virtual void	setTransform (const osg::Vec3d &position, osg::Matrixd &rotation)

virtual const float *	heights (int &sizeX, int &sizeY) const

virtual const unsigned int *	packedData (int &sizeX, int &sizeY) const

virtual void	getPosition (int gridX, int gridY, osg::Vec3d &position)

virtual double	clampDistance () const

virtual bool	clampPositionToTerrain (osg::Vec3d &position, float clampDistance)

virtual bool	simulationUpdate (float timeStep)

virtual void	onAreaChanged ()

virtual float	minClampOffset () const

virtual float	maxClampOffset () const

virtual void	computeBlendingData (float maxDiffPerMeter)

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

virtual	~DtVirtualBaseClass ()

Protected Member Functions
virtual unsigned int	packData (float height, float blend)

Protected Attributes
DtDe &	myDe

int	myClampIndex

float	myMinClampOffset

float	myMaxClampOffset

osg::Vec3d	myPosition

osg::Matrixd	myRotation

float	myBoundsX

float	myBoundsY

int	myPointCountX

int	myPointCountY

float *	myHeights

unsigned int *	myPackedData

DtIntersector *	myIntersector = nullptr

Private Member Functions
	DtWeatherSurfaceGrid ()=delete

	DtWeatherSurfaceGrid (const DtWeatherSurfaceGrid &other)=delete

DtWeatherSurfaceGrid &	operator= (const DtWeatherSurfaceGrid &other)=delete

Constructor & Destructor Documentation

makVrv::DtWeatherSurfaceGrid::DtWeatherSurfaceGrid ( makVrv::DtDe & de )

CTOR.

virtual makVrv::DtWeatherSurfaceGrid::~DtWeatherSurfaceGrid ( )

virtual

DTOR.

makVrv::DtWeatherSurfaceGrid::DtWeatherSurfaceGrid ( )

privatedelete

Default Constructor not implemented.

makVrv::DtWeatherSurfaceGrid::DtWeatherSurfaceGrid ( const DtWeatherSurfaceGrid & other )

privatedelete

Copy Constructor not implemented - Copy not allowed.

Member Function Documentation

DtWeatherSurfaceGrid& makVrv::DtWeatherSurfaceGrid::operator= ( const DtWeatherSurfaceGrid & other )

privatedelete

Assignment Operator not implemented - Assignment not allowed.

virtual void makVrv::DtWeatherSurfaceGrid::setBounds	(	float	boundsX,
		float	boundsY
	)

virtual

Sets the rectangular bounds of the area.

Parameters

boundsX	The x size of the bounds.
boundsY	The y size of the bounds.

virtual void makVrv::DtWeatherSurfaceGrid::setGridSize	(	int	sizeX,
		int	sizeY
	)

virtual

Sets the number of points in the x and y directions of the grid. Calling this method re-creates the grid.

Parameters

sizeX	The x count of points on the rectangular grid (must be > 1).
sizeY	The y count of points on the rectangular grid (must be > 1).

virtual void makVrv::DtWeatherSurfaceGrid::setTransform	(	const osg::Vec3d &	position,
		osg::Matrixd &	rotation
	)

virtual

Sets the grid transform.

Parameters

position	The transform position in world space.
rotation	The transform rotation in world space.

virtual const float* makVrv::DtWeatherSurfaceGrid::heights	(	int &	sizeX,
		int &	sizeY
	)		const

virtual

Returns the grid heights array used for terrain clamping.

Parameters

sizeX	Filled in output for the grid size in the x direction.
sizeY	Filled in output for the grid size in the y direction.

virtual const unsigned int* makVrv::DtWeatherSurfaceGrid::packedData	(	int &	sizeX,
		int &	sizeY
	)		const

virtual

Returns the grid heights/blend packedData array used for terrain clamping.

Parameters

sizeX	Filled in output for the grid size in the x direction.
sizeY	Filled in output for the grid size in the y direction.

virtual void makVrv::DtWeatherSurfaceGrid::getPosition	(	int	gridX,
		int	gridY,
		osg::Vec3d &	position
	)

virtual

Gets a grid 3D position at the given grid index.

Parameters

gridX	The X grid index to get the position for.
gridY	The Y grid index to get the position for.
position	The filled out position.

virtual double makVrv::DtWeatherSurfaceGrid::clampDistance ( ) const

virtual

Returns the distance used for clamping to the terrain.

virtual bool makVrv::DtWeatherSurfaceGrid::clampPositionToTerrain	(	osg::Vec3d &	position,
		float	clampDistance
	)

virtual

Clamps the given position to the terrain surface. Returns true if successful.

Parameters

position	The input/output position to clamp.
clampDistance	The above/below distance to search for a surface.

virtual bool makVrv::DtWeatherSurfaceGrid::simulationUpdate ( float timeStep )

virtual

Updates the grid clamping. Returns false when all points have been clamped and no more updates are required.

Parameters

timeStep The update timestep.

virtual void makVrv::DtWeatherSurfaceGrid::onAreaChanged ( )

virtual

Called to indicate the area bounds or transform has changed. This will reset the clamping process.

virtual float makVrv::DtWeatherSurfaceGrid::minClampOffset ( ) const

virtual

Returns the minimum calculated clamp offset value.

virtual float makVrv::DtWeatherSurfaceGrid::maxClampOffset ( ) const

virtual

Returns the maximum calculated clamp offset value.

virtual void makVrv::DtWeatherSurfaceGrid::computeBlendingData ( float maxDiffPerMeter )

virtual

/brief Computes blending values based on grid point height differences. This packs height and blending data into the unsigned int packed data array. Blend will be linear from 1.0 at no height difference to 0.0f at maximum allowed difference. This operates on the current set of height data. /param maxDiffPerMeter The height difference per meter where blend values will be zero.

virtual unsigned int makVrv::DtWeatherSurfaceGrid::packData	(	float	height,
		float	blend
	)

protectedvirtual

Packs the given height and blend values into an unsigned int.

Parameters

height	A height value stored in 24 bits.
blend	A blend value in the range of (0.0f to 1.0f) stored in 8 bits.

Member Data Documentation

DtDe& makVrv::DtWeatherSurfaceGrid::myDe

protected

int makVrv::DtWeatherSurfaceGrid::myClampIndex

protected

float makVrv::DtWeatherSurfaceGrid::myMinClampOffset

protected

float makVrv::DtWeatherSurfaceGrid::myMaxClampOffset

protected

osg::Vec3d makVrv::DtWeatherSurfaceGrid::myPosition

protected

osg::Matrixd makVrv::DtWeatherSurfaceGrid::myRotation

protected

float makVrv::DtWeatherSurfaceGrid::myBoundsX

protected

float makVrv::DtWeatherSurfaceGrid::myBoundsY

protected

int makVrv::DtWeatherSurfaceGrid::myPointCountX

protected

int makVrv::DtWeatherSurfaceGrid::myPointCountY

protected

float* makVrv::DtWeatherSurfaceGrid::myHeights

protected

unsigned int* makVrv::DtWeatherSurfaceGrid::myPackedData

protected

DtIntersector* makVrv::DtWeatherSurfaceGrid::myIntersector = nullptr

protected

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

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

Public Member Functions

Protected Member Functions

Protected Attributes

Private Member Functions

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation