SbProjector Class Reference

Base class for representing projectors. More...

#include <Inventor/projectors/SbProjector.h>

Inheritance diagram for SbProjector:

Public Member Functions
virtual SbVec3f	project (const SbVec2f &point)=0
	Apply the projector using the given point, returning the point in three dimensions that it projects to.
virtual void	setViewVolume (const SbViewVolume &vol)
	Set the view volume to use for the projection.
const SbViewVolume &	getViewVolume () const
	Get the view volume to use for the projection.
virtual void	setWorkingSpace (const SbMatrix &space)
	Set the transform space to work in.
const SbMatrix &	getWorkingSpace () const
	Get the transform space to work in.
virtual SbProjector *	copy () const =0
	Creates and returns an exact copy of the projector.

Protected Member Functions
	SbProjector ()
	Default constructor.
virtual	~SbProjector ()
SbLine	getWorkingLine (const SbVec2f &point) const
	Given this mouse point, return the line it projects to in working space.

Protected Attributes
SbViewVolume	viewVol
SbMatrix	worldToWorking
SbMatrix	workingToWorld

Detailed Description

SbProjector is the base class for all projector classes. Projector classes are used to convert from window space (usually based on the mouse location) into a 3D point. This is done by projecting the window coordinate as a 3D vector onto a geometric function in 3-space, and computing the intersection point. Most projectors actually compute incremental changes and produce incremental rotations and translation as needed. Projectors are used to write 3D interactive manipulators and viewers.

See Also

SbCylinderProjector, SbCylinderPlaneProjector, SbCylinderSectionProjector, SbCylinderSheetProjector, SbLineProjector, SbPlaneProjector, SbSpherePlaneProjector, SbSphereProjector, SbSphereSectionProjector, SbSphereSheetProjector

Definition at line 86 of file SbProjector.h.

Constructor & Destructor Documentation

SbProjector()

SbProjector::SbProjector ( )

protected

The default view volume is undefined. The default working space is identity (world space).

~SbProjector()

virtual SbProjector::~SbProjector ( )

inlineprotectedvirtual

Definition at line 122 of file SbProjector.h.

Member Function Documentation

copy()

virtual SbProjector * SbProjector::copy ( ) const

pure virtual

Implemented in SbCylinderPlaneProjector, SbCylinderSectionProjector, SbCylinderSheetProjector, SbLineProjector, SbPlaneProjector, SbSpherePlaneProjector, SbSphereSectionProjector, and SbSphereSheetProjector.

getViewVolume()

const SbViewVolume & SbProjector::getViewVolume ( ) const

inline

Definition at line 102 of file SbProjector.h.

getWorkingLine()

SbLine SbProjector::getWorkingLine ( const SbVec2f &  point ) const

protected

getWorkingSpace()

const SbMatrix & SbProjector::getWorkingSpace ( ) const

inline

Definition at line 111 of file SbProjector.h.

project()

virtual SbVec3f SbProjector::project ( const SbVec2f &  point )

pure virtual

The point should be normalized (lie in the range [0.0,1.0]), with (0,0) at the lower-left.

Implemented in SbCylinderPlaneProjector, SbCylinderSectionProjector, SbCylinderSheetProjector, SbLineProjector, SbPlaneProjector, SbSpherePlaneProjector, SbSphereSectionProjector, SbSphereSheetProjector, SbCylinderProjector, and SbSphereProjector.

Referenced by SbLineProjector::setStartPosition(), and SbPlaneProjector::setStartPosition().

setViewVolume()

virtual void SbProjector::setViewVolume ( const SbViewVolume &  vol )

virtual

This is typically supplied from SoCamera::getViewVolume().

setWorkingSpace()

virtual void SbProjector::setWorkingSpace ( const SbMatrix &  space )

virtual

This matrix should transform working space coordinates into world space. The default matrix is identity, meaning that the default working space is world space.

Reimplemented in SbCylinderProjector, and SbSphereProjector.

Member Data Documentation

viewVol

SbViewVolume SbProjector::viewVol

protected

Definition at line 128 of file SbProjector.h.

workingToWorld

SbMatrix SbProjector::workingToWorld

protected

Definition at line 130 of file SbProjector.h.

worldToWorking

SbMatrix SbProjector::worldToWorking

protected

Definition at line 129 of file SbProjector.h.

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

• C:/jh/mevislab/4.0.2_1/build/MeVis/ThirdParty/Sources/Inventor/include/Inventor/projectors/SbProjector.h