Sphere-sheet projector. More...

#include <Inventor/projectors/SbSphereSheetProjector.h>

Inheritance diagram for SbSphereSheetProjector:

Public Member Functions
	SbSphereSheetProjector (bool orientToEye=TRUE)

	SbSphereSheetProjector (const SbSphere &sph, bool orientToEye=TRUE)
	Constructors.

	~SbSphereSheetProjector ()
	Destructor.

virtual SbProjector *	copy () const
	Returns an instance that is a copy of this instance.

virtual SbVec3f	project (const SbVec2f &point)
	Apply the projector using the given point, 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
virtual SbVec3f	project (const SbVec2f &point)=0
	Apply the projector using the given point, returning the point in three dimensions that it projects to.

SbVec3f	projectAndGetRotation (const SbVec2f &point, SbRotation &rot)
	Apply the projector using the given point, returning the point in three dimensions that it projects to.

virtual SbRotation	getRotation (const SbVec3f &point1, const SbVec3f &point2)=0
	Get a rotation given two points on this sphere projector.

void	setSphere (const SbSphere &sph)
	Set and get the sphere on which to project points.

const SbSphere &	getSphere () const
	Set and get the sphere on which to project points.

void	setOrientToEye (bool orientToEye)
	Set and get whether the projector should always be oriented towards the eye.

bool	isOrientToEye () const
	Set and get whether the projector should always be oriented towards the eye.

void	setFront (bool inFront)
	Set whether the projector should intersect the half of the sphere that faces the eye.

bool	isFront () const
	Get whether the projector should intersect the half of the sphere that faces the eye.

bool	isPointInFront (const SbVec3f &point) const
	Get whether the projector should intersect the half of the sphere that faces the eye.

virtual void	setWorkingSpace (const SbMatrix &space)
	Set the transform space to work in.

	~SbSphereProjector ()
	Destructor.

Public Member Functions inherited from SbProjector
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
void	setupPlane ()
	Sets up the plane use to project on to.

Protected Member Functions inherited from SbSphereProjector
	SbSphereProjector (bool orientToEye)
	Constructors The default sphere to use has a radius of 1.0 and is centered at (0,0,0).

	SbSphereProjector (const SbSphere &s, bool orientToEye)

Protected Member Functions inherited from SbProjector
	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
SbVec3f	workingProjPoint
	The projection point in working space.

SbVec3f	planePoint
	Information about the plane used for intersection testing.

SbVec3f	planeDir
	normal direction

float	planeDist
	distance from sphere center

SbPlane	tolPlane
	the plane itself

Protected Attributes inherited from SbSphereProjector
bool	intersectFront
	Are intersections done on the front half (if not, they're done on the back half) of the sphere?

SbSphere	sphere
	The sphere being used.

bool	orientToEye
	TRUE if always oriented to eye.

bool	needSetup
	Set TRUE whenever sphere, work space or orientation changes.

SbVec3f	lastPoint
	cached last point on this projector

Protected Attributes inherited from SbProjector
SbViewVolume	viewVol

SbMatrix	worldToWorking

SbMatrix	workingToWorld

Detailed Description

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 99 of file SbSphereSheetProjector.h.

Constructor & Destructor Documentation

◆ SbSphereSheetProjector() [1/2]

SbSphereSheetProjector::SbSphereSheetProjector ( bool orientToEye = TRUE )

See also: SbSphereSheetProjector(const SbSphere &sph, bool orientToEye)

◆ SbSphereSheetProjector() [2/2]

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

The first uses a default sphere centered at the origin with radius 1.0; the sphere is supplied in the second. 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

Definition at line 120 of file SbSphereSheetProjector.h.

Member Function Documentation

◆ copy()

virtual SbProjector * SbSphereSheetProjector::copy ( ) const

virtual

The caller is responsible for deleting the copy when done.

Implements SbProjector.

◆ getRotation()

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

virtual

Implements SbSphereProjector.

◆ project()

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

virtual

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

Implements SbSphereProjector.

◆ setupPlane()

void SbSphereSheetProjector::setupPlane ( )

protected

Member Data Documentation

◆ planeDir

SbVec3f SbSphereSheetProjector::planeDir

protected

Definition at line 144 of file SbSphereSheetProjector.h.

◆ planeDist

float SbSphereSheetProjector::planeDist

protected

Definition at line 145 of file SbSphereSheetProjector.h.

◆ planePoint

SbVec3f SbSphereSheetProjector::planePoint

protected

point on plane

Definition at line 143 of file SbSphereSheetProjector.h.

◆ tolPlane

SbPlane SbSphereSheetProjector::tolPlane

protected

Definition at line 146 of file SbSphereSheetProjector.h.

◆ workingProjPoint

SbVec3f SbSphereSheetProjector::workingProjPoint

protected

Definition at line 140 of file SbSphereSheetProjector.h.

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/SbSphereSheetProjector.h

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ SbSphereSheetProjector() [1/2]

◆ SbSphereSheetProjector() [2/2]

◆ ~SbSphereSheetProjector()

Member Function Documentation

◆ copy()

◆ getRotation()

◆ project()

◆ setupPlane()

Member Data Documentation

◆ planeDir

◆ planeDist

◆ planePoint

◆ tolPlane

◆ workingProjPoint