NAME

SbCylinderSectionProjector — cylinder-section projector

INHERITS FROM

SbProjector > SbCylinderProjector > SbCylinderSectionProjector

SYNOPSIS

#include <Inventor/projectors/SbCylinderSectionProjector.h>

Methods from class SbCylinderSectionProjector:

SbCylinderSectionProjector(float edgeTol = .9, SbBool orientToEye = TRUE)

SbCylinderSectionProjector(const SbCylinder &cyl, float edgeTol = .9, SbBool orientToEye = TRUE)

~SbCylinderSectionProjector()

void setTolerance(float edgeTol)

float getTolerance() const

SbBool isWithinTolerance(const SbVec3f &point)

Methods from class SbCylinderProjector:

SbVec3f projectAndGetRotation(const SbVec2f &point, SbRotation &rot)

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

void setCylinder(const SbCylinder &cyl)

const SbCylinder & getCylinder() const

void setOrientToEye(SbBool orientToEye)

SbBool isOrientToEye() const

void setFront(SbBool isFront)

SbBool isFront() const

SbBool isPointInFront(const SbVec3f &point) const

Methods from class SbProjector:

virtual SbVec3f project(const SbVec2f &point)

virtual void setViewVolume(const SbViewVolume &vol)

const SbViewVolume & getViewVolume() const

virtual void setWorkingSpace(const SbMatrix &space)

const SbMatrix & getWorkingSpace() const

virtual SbProjector * copy() const

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.

METHODS

SbCylinderSectionProjector(float edgeTol = .9, SbBool orientToEye = TRUE)

SbCylinderSectionProjector(const SbCylinder &cyl, float edgeTol = .9, SbBool orientToEye = TRUE)

Constructors. The first uses a default cylinder aligned with the Y axis with radius 1.0; the cylinder is supplied in the second. The position of the plane which slices the cylinder into a section is specified as a fraction of the cylinder radius with the parameter edgeTol. A tolerance value of 1.0 positions the plane down the center of the cylinder. A tolerance value of 0.5 defines the longitudinal plane halfway between the center and the outside edge of the cylinder. The default value is .9, so that almost half the cylinder is in front of the plane. The orientToEye parameter determines whether the plane is perpendicular to the eye, or perpendicular to the cylinder's Z axis. Setting that parameter to TRUE (the default) specifies that the plane be perpendicular to the eye, which is most often the desired behavior.

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

~SbCylinderSectionProjector()

Destructor.

void setTolerance(float edgeTol)

float getTolerance() const

Set and get the edge tolerance as a fraction of the radius of the cylinder. If this is 1.0, the projector is a half cylinder. If this is .1, the projector is a slice of the cylinder with radius .1*radius. Default is .9.

SbBool isWithinTolerance(const SbVec3f &point)

Find whether this point on the cylinder or tolerance plane is within tolerance.

SEE ALSO

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