SbSphereSheetProjector Class Reference

Sphere-sheet projector. More...

#include <Inventor/projectors/SbSphereSheetProjector.h>

Inheritance diagram for SbSphereSheetProjector:

Public Member Functions
	SbSphereSheetProjector (SbBool orientToEye=TRUE)
	Constructor that uses a default sphere centered at the origin with radius 1.0.
	SbSphereSheetProjector (const SbSphere &sph, SbBool orientToEye=TRUE)
	Constructor that uses a supplied sphere.
	~SbSphereSheetProjector ()
	Destructor.
virtual SbProjector *	copy () const
	Returns an instance that is a copy of this instance.
virtual SbVec3f	project (const SbVec2f &point)
	Applies the projector using the given point, returning the point in three dimensions that it projects to.
virtual SbVec3f	intersect (const SbLine &line)
	Applies the projector using the given line in world coordinates, returning the point in three dimensions that it projects to.
virtual SbRotation	getRotation (const SbVec3f &point1, const SbVec3f &point2)
	Computes a rotation based on two points on this projector.
Public Member Functions inherited from SbSphereProjector
SbVec3f	projectAndGetRotation (const SbVec2f &point, SbRotation &rot)
	Applies the projector using the given point, returning the point in three dimensions that it projects to.
void	setSphere (const SbSphere &sph)
	Sets the sphere on which to project points.
const SbSphere &	getSphere () const
	Gets the sphere on which to project points.
void	setOrientToEye (SbBool orientToEye)
	Sets whether the projector should always be oriented towards the eye.
SbBool	isOrientToEye () const
	Gets whether the projector should always be oriented towards the eye.
void	setFront (SbBool inFront)
	Sets whether the projector should intersect the half of the sphere that faces the eye.
SbBool	isFront () const
	Gets whether the projector should intersect the half of the sphere that faces the eye.
SbBool	isPointInFront (const SbVec3f &point) const
	Gets whether the projector should intersect the half of the sphere that faces the eye.
virtual void	setWorkingSpace (const SbMatrix &space)
	Sets the transform space to work in.
virtual	~SbSphereProjector ()
	Destructor.
Public Member Functions inherited from SbProjector
virtual	~SbProjector ()
	Destructor.
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.
const SbMatrix &	getWorkingSpace () const
	Get the transform space to work in.

Detailed Description

Sphere-sheet projector.

SbSphereSheetProjector projects a window space point (usually based on the mouse location) onto the surface of a sphere with a hyperbolic sheet draped over it. This allows smooth transitions onto and off of the sphere. Two projected points can produce a rotation about the sphere's center. When the mouse position projects on to the sheet, the rotations will be as if the sheet is being dragged, causing the sphere to roll beneath it.

Incremental changes (delta rotation) can be computed during interactive sessions. Sphere projectors are typically used to write interactive 3D manipulators and viewers.

SEE ALSO

SbCylinderProjector, SbCylinderPlaneProjector, SbCylinderSectionProjector, SbCylinderSheetProjector, SbLineProjector, SbPlaneProjector, SbSpherePlaneProjector

Definition at line 85 of file SbSphereSheetProjector.h.

Constructor & Destructor Documentation

SbSphereSheetProjector() [1/2]

SbSphereSheetProjector::SbSphereSheetProjector

(

SbBool

orientToEye = TRUE

)

Constructor that uses a default sphere centered at the origin with radius 1.0.

The orientToEye parameter determines whether the sheet is perpendicular to the eye, or perpendicular to the sphere's Z axis. Setting that parameter to TRUE (the default) specifies that the sheet be perpendicular to the eye, which is most often the desired behavior.

The default view volume is undefined, and the working space is identity.

SbSphereSheetProjector() [2/2]

SbSphereSheetProjector::SbSphereSheetProjector	(	const SbSphere &	sph,
		SbBool	orientToEye = TRUE
	)

Constructor that uses a supplied sphere.

The orientToEye parameter determines whether the sheet is perpendicular to the eye, or perpendicular to the sphere's Z axis. Setting that parameter to TRUE (the default) specifies that the sheet be perpendicular to the eye, which is most often the desired behavior.

The default view volume is undefined, and the working space is identity.

~SbSphereSheetProjector()

SbSphereSheetProjector::~SbSphereSheetProjector ( )

inline

Destructor.

Definition at line 115 of file SbSphereSheetProjector.h.

Member Function Documentation

copy()

virtual SbProjector * SbSphereSheetProjector::copy ( ) const

virtual

Returns an instance that is a copy of this instance.

The caller is responsible for deleting the copy when done.

Implements SbProjector.

getRotation()

virtual SbRotation SbSphereSheetProjector::getRotation ( const SbVec3f &  point1, const SbVec3f &  point2  )

virtual

Computes a rotation based on two points on this projector.

Implements SbSphereProjector.

intersect()

virtual SbVec3f SbSphereSheetProjector::intersect ( const SbLine &  line )

virtual

Applies the projector using the given line in world coordinates, returning the point in three dimensions that it projects to.

New for v3.0.

Implements SbSphereProjector.

project()

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

virtual

Applies the projector using the given point, returning the point in three dimensions that it projects to.

The point should be normalized from 0-1, with (0,0) at the lower-left.

Implements SbSphereProjector.

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

• Inventor/projectors/SbSphereSheetProjector.h