SoVolumeRenderDetail Class Reference

Stores detail information about a picked voxel or pick ray in a data volume. More...

#include <VolumeViz/details/SoVolumeRenderDetail.h>

Inheritance diagram for SoVolumeRenderDetail:

Public Member Functions
virtual SoType	getTypeId () const
	Returns the type identifier for this specific instance.
	SoVolumeRenderDetail ()
	Constructor.
virtual	~SoVolumeRenderDetail ()
	Destructor.
size_t	getMaskCount (SbBool realValue=FALSE) const
	Returns the number of volume masks applied to the first non-transparent voxel.
SoLDM::DataSetIdPair	getMask (size_t index, SbBool realValue=FALSE) const
	Returns the i-th volume mask applied to the first non-transparent voxel.
void	getVoxelStyleAndIsoValue (SoVolumeDataDrawStyle::DrawStyle &style, double &iso, SbBool realValue=FALSE) const
	Returns the style applied to the first non-transparent voxel (and its isovalue if the style is SoVolumeDataDrawStyle::ISOSURFACE).
void	getRgbaValues (std::vector< SbVec4ub > &rgbaValues, std::vector< SbVec3f > &objectPos, std::vector< SbVec3i32 > &dataPos, std::vector< SoLDMTileID > &tileIds, float opacityThreshold=-1.f) const
	Returns the RGBA value, object space position, data space position and tileId for each voxel intersected by the pick ray.
void	getRgbaValues (std::vector< SbVec4ub > &rgbaValues, std::vector< SbVec3f > &objectPos, float opacityThreshold=-1.f) const
	Returns the RGBA value and object space position of each voxel intersected by the pick ray.
void	getRgbaValues (std::vector< SbVec4ub > &rgbaValues, float opacityThreshold=-1.f) const
	Returns the RGBA value of each voxel intersected by the pick ray.
void	getRgbaValues (std::vector< SbVec4ub > &rgbaValues, std::vector< SbVec3i32 > &dataPos, float opacityThreshold=-1.f) const
	Returns the RGBA value and data space position of each voxel intersected by the pick ray.
const std::vector< SoLDMTileID > &	getRgbaValuesTileIds () const
	Returns the tileID of each voxel intersected by the pick ray.
virtual SoDetail *	copy () const
	Returns an instance that is a copy of this instance.
Public Member Functions inherited from SoVolumeDetail
	SoVolumeDetail ()
	Constructor.
virtual	~SoVolumeDetail ()
	Destructor.
void	getProfileObjectPos (SbVec3f profile[2]) const
	Returns the profile position in object space (world coordinates).
int	getProfileDataPos (SbVec3i32 profile[2]) const
	Returns the number of values along the profile and the profile position in data space (voxel coordinates).
int64_t	getProfileValue (int index, SbVec3i32 &pos, SbVec3f *objPos=0, SbBool realValue=FALSE) const
	Returns the index'th value (as an integer) and its position in object and data space.
double	getProfileValueD (int index, SbVec3i32 &pos, SbVec3f *objPos, SbBool realValue=FALSE) const
	Returns the index'th value (as a double) and its position in object and data space.
virtual SbBool	getFirstNonTransparentValue (int64_t &value, SbVec3i32 &pos, SbVec3f *objPos=0, SbBool realValue=FALSE) const
	Retrieves the value and position of the first non-transparent voxel along the pick ray (if any).
virtual SbBool	getFirstNonTransparentValue (double &value, SbVec3i32 &pos, SbVec3f *objPos=0, SbBool realValue=FALSE) const
	Retrieves the value and position of the first non-transparent voxel along the pick ray (if any).
Public Member Functions inherited from SoTypedObject
SbBool	isOfType (const SoType &type) const
	Returns TRUE if this object is of the type specified in type or is derived from that type.
template<typename TypedObjectClass >
SbBool	isOfType () const
	Returns TRUE if this object is of the type of class TypedObjectClass or is derived from that class.

Static Public Member Functions
static SoType	getClassTypeId ()
	Returns the type identifier for this class.
Static Public Member Functions inherited from SoVolumeDetail
static SoType	getClassTypeId ()
	Returns the type identifier for this class.
Static Public Member Functions inherited from SoDetail
static SoType	getClassTypeId ()
	Returns type identifier for this class.
Static Public Member Functions inherited from SoTypedObject
static SoType	getClassTypeId ()
	Returns the type identifier for this class.

Detailed Description

Stores detail information about a picked voxel or pick ray in a data volume.

A successful pick operation returns an SoPickedPoint object. If the picked geometry is an SoVolumeRender node, use the getDetail method and cast the result to this class to get extra information about the the pick.

SoVolumeRenderDetail returns information about the first (closest) non-transparent voxel along the pick ray and/or information about all the voxels intersected by the pick ray (called a profile). For the first non-transparent voxel (if any) on the pick ray, it returns XYZ position, IJK location, and data value. For the profile defined by all the intersected voxels, it returns:

• Profile position in object space (two XYZ points)
• Profile location in the data volume (two IJK indices)
• Number of values along the profile
• Each voxel value and corresponding IJK location

Use the methods in SoVolumeDetail to get information about the data values of the picked voxels. Use the getRgba... methods in this class to get information about the mapped RGBA colors of the picked voxels. Because these methods return colors, they always return information based on the (possibly subsampled) tiles currently in memory.

GPU picking: Please see the discussion of GPU picking in SoVolumeDetail.

Limitations:

• If multiple volumes are being combined under an SoMultiDataSeparator, the detail class only returns values for the first volume in the scene graph.

SEE ALSO

SoDetail, SoVolumeDetail, SoVolumeRender

Definition at line 83 of file SoVolumeRenderDetail.h.

Constructor & Destructor Documentation

SoVolumeRenderDetail()

SoVolumeRenderDetail::SoVolumeRenderDetail

(

)

Constructor.

~SoVolumeRenderDetail()

virtual SoVolumeRenderDetail::~SoVolumeRenderDetail ( )

virtual

Destructor.

Member Function Documentation

copy()

virtual SoDetail * SoVolumeRenderDetail::copy ( ) const

virtual

Returns an instance that is a copy of this instance.

The caller is responsible for deleting the copy when it is no longer needed.

Reimplemented from SoVolumeDetail.

getClassTypeId()

static SoType SoVolumeRenderDetail::getClassTypeId ( )

static

Returns the type identifier for this class.

getMask()

SoLDM::DataSetIdPair SoVolumeRenderDetail::getMask	(	size_t	index,
		SbBool	realValue = FALSE
	)		const

Returns the i-th volume mask applied to the first non-transparent voxel.

index must be in the valid range returned by getMaskCount().

If realValue is TRUE, VolumeViz will return the actual value from the full resolution data. Note that this may require a read from disk if full resolution data is not currently in memory. If FALSE, VolumeViz will return the value from the (possibly subsampled) data currently in memory.

Warning

To use GPU picking, you must specify realValue = FALSE.

getMaskCount()

size_t SoVolumeRenderDetail::getMaskCount

(

SbBool

realValue = FALSE

)

const

Returns the number of volume masks applied to the first non-transparent voxel.

If realValue is TRUE, VolumeViz will return the actual value from the full resolution data. Note that this may require a read from disk if full resolution data is not currently in memory. If FALSE, VolumeViz will return the value from the (possibly subsampled) data currently in memory.

Warning

To use GPU picking, you must specify realValue = FALSE.

getRgbaValues() [1/4]

void SoVolumeRenderDetail::getRgbaValues	(	std::vector< SbVec4ub > &	rgbaValues,
		float	opacityThreshold = -1.f
	)		const

Returns the RGBA value of each voxel intersected by the pick ray.

Voxels with a alpha value less or equal to opacityThreshold are ignored. Values returned are based on the (possibly subsampled) tiles currently in memory.

getRgbaValues() [2/4]

void SoVolumeRenderDetail::getRgbaValues	(	std::vector< SbVec4ub > &	rgbaValues,
		std::vector< SbVec3f > &	objectPos,
		float	opacityThreshold = -1.f
	)		const

Returns the RGBA value and object space position of each voxel intersected by the pick ray.

Plus their object space position. Voxels with a alpha value less or equal to opacityThreshold are ignored. Values returned are based on the (possibly subsampled) tiles currently in memory.

getRgbaValues() [3/4]

void SoVolumeRenderDetail::getRgbaValues	(	std::vector< SbVec4ub > &	rgbaValues,
		std::vector< SbVec3f > &	objectPos,
		std::vector< SbVec3i32 > &	dataPos,
		std::vector< SoLDMTileID > &	tileIds,
		float	opacityThreshold = -1.f
	)		const

Returns the RGBA value, object space position, data space position and tileId for each voxel intersected by the pick ray.

Voxels with a alpha value less or equal to opacityThreshold are ignored. Values returned are based on the (possibly subsampled) tiles currently in memory.

getRgbaValues() [4/4]

void SoVolumeRenderDetail::getRgbaValues	(	std::vector< SbVec4ub > &	rgbaValues,
		std::vector< SbVec3i32 > &	dataPos,
		float	opacityThreshold = -1.f
	)		const

Returns the RGBA value and data space position of each voxel intersected by the pick ray.

Voxels with a alpha value less or equal to opacityThreshold are ignored. Values returned are based on the (possibly subsampled) tiles currently in memory.

getRgbaValuesTileIds()

const std::vector< SoLDMTileID > & SoVolumeRenderDetail::getRgbaValuesTileIds

(

)

const

Returns the tileID of each voxel intersected by the pick ray.

Values returned are based on the (possibly subsampled) tiles currently in memory.

getTypeId()

virtual SoType SoVolumeRenderDetail::getTypeId ( ) const

virtual

Returns the type identifier for this specific instance.

Reimplemented from SoVolumeDetail.

getVoxelStyleAndIsoValue()

void SoVolumeRenderDetail::getVoxelStyleAndIsoValue	(	SoVolumeDataDrawStyle::DrawStyle &	style,
		double &	iso,
		SbBool	realValue = FALSE
	)		const

Returns the style applied to the first non-transparent voxel (and its isovalue if the style is SoVolumeDataDrawStyle::ISOSURFACE).

If realValue is TRUE, VolumeViz will return the actual value from the full resolution data. Note that this may require a read from disk if full resolution data is not currently in memory. If FALSE, VolumeViz will return the value from the (possibly subsampled) data currently in memory.

Warning

To use GPU picking, you must specify realValue = FALSE.

---

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

• VolumeViz/details/SoVolumeRenderDetail.h