SbSphereSectionProjector Class Reference

The SbSphereSectionProjector projects 2D points to a sliced sphere.The projection sphere for this class is sliced by a clipping plane. Projections will be mapped to the remaining sphere part. More...

#include <Inventor/projectors/SbSphereSectionProjector.h>

Inheritance diagram for SbSphereSectionProjector:

Public Member Functions
	SbSphereSectionProjector (const float edgetol=0.9f, const SbBool orienttoeye=TRUE)
	SbSphereSectionProjector (const SbSphere &sph, const float edgetol=0.9f, const SbBool orienttoeye=TRUE)
virtual SbProjector *	copy (void) const
virtual SbVec3f	project (const SbVec2f &point)
virtual SbRotation	getRotation (const SbVec3f &point1, const SbVec3f &point2)
void	setTolerance (const float edgetol)
float	getTolerance (void) const
void	setRadialFactor (const float rad=0.0f)
float	getRadialFactor (void) const
SbBool	isWithinTolerance (const SbVec3f &point)
Public Member Functions inherited from SbSphereProjector
SbVec3f	projectAndGetRotation (const SbVec2f &point, SbRotation &rot)
void	setSphere (const SbSphere &sph)
const SbSphere &	getSphere (void) const
void	setOrientToEye (const SbBool orienttoeye)
SbBool	isOrientToEye (void) const
void	setFront (const SbBool infront)
SbBool	isFront (void) const
SbBool	isPointInFront (const SbVec3f &point) const
virtual void	setWorkingSpace (const SbMatrix &space)
Public Member Functions inherited from SbProjector
virtual void	setViewVolume (const SbViewVolume &vol)
const SbViewVolume &	getViewVolume (void) const
const SbMatrix &	getWorkingSpace (void) const
virtual SbBool	tryProject (const SbVec2f &point, const float epsilon, SbVec3f &result)

Protected Member Functions
virtual void	setupTolerance (void)
Protected Member Functions inherited from SbSphereProjector
	SbSphereProjector (const SbBool orienttoeye)
	SbSphereProjector (const SbSphere &s, const SbBool orienttoeye)
SbBool	intersectSphereFront (const SbLine &l, SbVec3f &result)
Protected Member Functions inherited from SbProjector
	SbProjector (void)
virtual	~SbProjector ()
SbLine	getWorkingLine (const SbVec2f &point) const
float	findVanishingDistance (void) const
SbBool	verifyProjection (const SbVec3f &projpt) const

Protected Attributes
float	tolerance
float	tolDist
float	radialFactor
SbVec3f	planePoint
SbVec3f	planeDir
float	planeDist
SbPlane	tolPlane
Protected Attributes inherited from SbSphereProjector
SbBool	intersectFront
SbSphere	sphere
SbBool	orientToEye
SbBool	needSetup
SbVec3f	lastPoint
Protected Attributes inherited from SbProjector
SbViewVolume	viewVol
SbMatrix	worldToWorking
SbMatrix	workingToWorld

Detailed Description

The SbSphereSectionProjector projects 2D points to a sliced sphere.

The projection sphere for this class is sliced by a clipping plane. Projections will be mapped to the remaining sphere part.

See also

SbCylinderSectionProjector

Constructor & Destructor Documentation

SbSphereSectionProjector::SbSphereSectionProjector	(	const float	edgetol = 0.9f,
		const SbBool	orienttoeye = TRUE
	)

Default constructor. See SbSphereProjector::SbSphereProjector().

The edgetol value should be within <0, 1], and specifies how much of the sphere is used as a projection surface. 1.0 means the full front half is used.

SbSphereSectionProjector::SbSphereSectionProjector	(	const SbSphere &	sph,
		const float	edgetol = 0.9f,
		const SbBool	orienttoeye = TRUE
	)

Constructor with explicit setting of the projection sphere.

Member Function Documentation

SbProjector * SbSphereSectionProjector::copy ( void  ) const

virtual

Construct and return a copy of this projector. The caller is responsible for destructing the new instance.

Note that if the Coin library has been built as a DLL under Microsoft Windows and you use this method from application code, you must make sure that both the Coin DLL and the application executable is using the same instance of a C Run-Time (CRT) library. Otherwise, you will get memory heap corruption upon deallocating the returned instances, eventually leading to mysterious crashes.

Implements SbProjector.

Reimplemented in SbSpherePlaneProjector.

SbVec3f SbSphereSectionProjector::project ( const SbVec2f &  point )

virtual

Project the 2D point from normalized viewport coordinates to a 3D point. The mapping will be done in accordance with the type of the projector.

Implements SbProjector.

Reimplemented in SbSpherePlaneProjector.

SbRotation SbSphereSectionProjector::getRotation ( const SbVec3f &  point1, const SbVec3f &  point2  )

virtual

Returns rotation on the projection surface which re-orients point1 to point2.

Implements SbSphereProjector.

Reimplemented in SbSpherePlaneProjector.

void SbSphereSectionProjector::setTolerance

(

const float

edgetol

)

The edgetol value decides how much of the surface of the sphere is used for projection. 1.0 means the full sphere half is used.

float SbSphereSectionProjector::getTolerance

(

void

)

const

Returns edge tolerance for the sphere half.

void SbSphereSectionProjector::setRadialFactor

(

const float

rad = 0.0f

)

Set up the controlling value for how the rotation calculation will be done "outside" the sphere.

A radialFactor equal to 0.0 will make the rotations be done like if they were done by dragging the sphere, while a value of 1.0 will make the rotation be around the axis from the viewpoint towards the sphere.

float SbSphereSectionProjector::getRadialFactor

(

void

)

const

Returns value of radialFactor.

See also

setRadialFactor()

SbBool SbSphereSectionProjector::isWithinTolerance

(

const SbVec3f &

point

)

Check if point is within the part of the sphere used for projections.

void SbSphereSectionProjector::setupTolerance ( void  )

protectedvirtual

Recalculate the internal projection surface settings. Needs to be done if any of the parameters influencing the projection surface have been changed from subclasses without using the access methods.

Member Data Documentation

SbSphereSectionProjector::tolerance

protected

Tolerance value, deciding how much of the half-sphere to do projections against.

SbSphereSectionProjector::tolDist

protected

Tolerance value multiplied with the sphere radius.

SbSphereSectionProjector::radialFactor

protected

The radialfactor value decides how to calculate rotations outside of the sphere.

See also

setRadialFactor()

SbSphereSectionProjector::planePoint

protected

A point in the plane where the center of the sphere is.

SbSphereSectionProjector::planeDir

protected

Direction of cutting plane.

SbSphereSectionProjector::planeDist

protected

Distance from plane to sphere center.

SbSphereSectionProjector::tolPlane

protected

Defines the plane cutting the sphere into a projection part.

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

• SbSphereSectionProjector.h
• SbSphereSectionProjector.cpp