Sphere-section projector. More...

#include <Inventor/projectors/SbSphereSectionProjector.h>

Inheritance diagram for SbSphereSectionProjector:

Public Member Functions
	SbSphereSectionProjector (float edgeTol=.9, bool orientToEye=TRUE)
	Default constructor.

	SbSphereSectionProjector (const SbSphere &sph, float edgeTol=.9, bool orientToEye=TRUE)
	Constructor taking the sphere.

	~SbSphereSectionProjector ()
	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.

void	setTolerance (float edgeTol)

float	getTolerance () const
	Set and get the edge tolerance as a fraction of the radius of the sphere.

void	setRadialFactor (float rad=0.0)

float	getRadialFactor () const
	Set and get the radial rotation factor.

bool	isWithinTolerance (const SbVec3f &point)
	Find whether this point on the sphere or tolerance plane is within tolerance.

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
virtual void	setupTolerance ()
	Sets up the tolerance slice.

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
float	tolerance
	Information about the slice tolerance.

float	tolDist
	dist from planePoint to tolerance slice

float	radialFactor

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

SbSphereSectionProjector projects a window space point (usually based on the mouse location) onto the section of a sphere that has been sliced by a plane. Two projected points can produce a rotation about the sphere's center. The tolerance slice can be specified as a fraction of the radius of the sphere. The projection point will not extend beyond the sliced portion of the sphere.

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, SbCylinderSectionProjector, SbCylinderPlaneProjector, SbCylinderSheetProjector, SbLineProjector, SbPlaneProjector, SbSpherePlaneProjector, SbSphereSheetProjector

Definition at line 95 of file SbSphereSectionProjector.h.

Constructor & Destructor Documentation

◆ SbSphereSectionProjector() [1/2]

SbSphereSectionProjector::SbSphereSectionProjector	(	float	edgeTol = `.9`,
		bool	orientToEye = `TRUE`
	)

The default view volume is undefined. The default working space is identity (world space). The default sphere to use has a radius of 1.0 and is centered at (0,0,0). The default edge tolerance is .9. The default eye orientation is TRUE.

◆ SbSphereSectionProjector() [2/2]

SbSphereSectionProjector::SbSphereSectionProjector	(	const SbSphere &	sph,
		float	edgeTol = `.9`,
		bool	orientToEye = `TRUE`
	)

◆ ~SbSphereSectionProjector()

SbSphereSectionProjector::~SbSphereSectionProjector ( )

inline

Definition at line 113 of file SbSphereSectionProjector.h.

Member Function Documentation

◆ copy()

virtual SbProjector * SbSphereSectionProjector::copy ( ) const

virtual

The caller is responsible for deleting the copy when done.

Implements SbProjector.

Reimplemented in SbSpherePlaneProjector.

◆ getRadialFactor()

float SbSphereSectionProjector::getRadialFactor ( ) const

inline

When the mouse is dragged off the edge of the sphere, the mouse motion can be classified as either tangential (moving in a circle around the sphere) or radial (moving toward or away from the center). The tangential motion will always map to a rotation around the center, (like the hands of a clock). The radial motion, by default, has no effect. But if you set the radialFactor to be > 0.0, this motion will make the sphere rotate as if the mouse is pulling the top of the sphere out toward the mouse. If radialFactor = 1.0, then pulling has a ‘normal’ feel (that is, the mouse motion causes the same amount of rotation as if you had rotated by hitting the actual surface of the sphere). Default is 0.0

Definition at line 153 of file SbSphereSectionProjector.h.