NAME

SbCylinderSheetProjector — cylinder-sheet projector

INHERITS FROM

SbProjector > SbCylinderProjector > SbCylinderSheetProjector

SYNOPSIS

#include <Inventor/projectors/SbCylinderSheetProjector.h>

Methods from class SbCylinderSheetProjector:

SbCylinderSheetProjector(SbBool orientToEye = TRUE)

SbCylinderSheetProjector(const SbCylinder &cyl, SbBool orientToEye = TRUE)

~SbCylinderSheetProjector()

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

SbCylinderSheetProjector projects a window space point (usually based on the mouse location) onto the surface of a cylinder with a hyperbolic sheet draped over it. This allows smooth transitions onto and off of the cylinder. Two projected points can produce a rotation along the cylinder's axis. When the mouse position projects on to the sheet, the rotations will be as if the sheet is being dragged, causing the cylinder to roll beneath it.

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

METHODS

SbCylinderSheetProjector(SbBool orientToEye = TRUE)

SbCylinderSheetProjector(const SbCylinder &cyl, 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 orientToEye parameter determines whether the sheet 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.

~SbCylinderSheetProjector()

Destructor.

SEE ALSO

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