Cylinder-section projector. More...

#include <Inventor/projectors/SbCylinderSectionProjector.h>

Inheritance diagram for SbCylinderSectionProjector:

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

	SbCylinderSectionProjector (const SbCylinder &cyl, float edgeTol=.9, bool orientToEye=TRUE)
	Constructor taking the cylinder.

	~SbCylinderSectionProjector ()
	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 cylinder.

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

Public Member Functions inherited from SbCylinderProjector
	~SbCylinderProjector ()
	Destructor.

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 cylinder projector.

void	setCylinder (const SbCylinder &cyl)
	Set and get the cylinder on which to project points.

const SbCylinder &	getCylinder () const
	Set and get the cylinder 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 isFront)
	Set and get whether the projector should intersect the half of the cylinder that faces the eye.

bool	isFront () const
	Set and get whether the projector should intersect the half of the cylinder that faces the eye.

bool	isPointInFront (const SbVec3f &point) const
	Set and get whether the projector should intersect the half of the cylinder that faces the eye.

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

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 ring.

Protected Member Functions inherited from SbCylinderProjector
	SbCylinderProjector (bool orientToEye)
	Constructors The default cylinder to is centered about the Y axis and has a radius of 1.0.

	SbCylinderProjector (const SbCylinder &cyl, 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 ring tolerance.

float	tolDist
	dist from planeLine to cylinder

SbVec3f	planeDir
	Information about the plane used for intersection testing.

SbLine	planeLine
	line parallel to axis, but in plane

float	planeDist
	distance from cylinder center

SbPlane	tolPlane
	the plane itself

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

SbCylinder	cylinder
	Cylinder for this projector.

bool	orientToEye
	TRUE if always oriented to eye.

bool	needSetup
	Set TRUE whenever cylinder, 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

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

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

See Also

: SbCylinderPlaneProjector, SbCylinderSheetProjector, SbLineProjector, SbPlaneProjector, SbSpherePlaneProjector, SbSphereProjector, SbSphereSectionProjector, SbSphereSheetProjector

Definition at line 91 of file SbCylinderSectionProjector.h.

Constructor & Destructor Documentation

◆ SbCylinderSectionProjector() [1/2]

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

The default view volume is undefined. The default working space is identity (world space). The default cylinder is centered about the Y axis and has a radius of 1.0. The default edge tolerance is .9. The default eye orientation is TRUE.