SbSphereSheetProjector(3IV)

NAME
     SbSphereSheetProjector - sphere-sheet projector

INHERITS FROM
     SbProjector > SbSphereProjector > SbSphereSheetProjector

SYNOPSIS
     #include <Inventor/projectors/SbSphereSheetProjector.h>

          Methods from class SbSphereSheetProjector:

                         SbSphereSheetProjector(SbBool orientToEye = TRUE)
                         SbSphereSheetProjector(const SbSphere &sph, SbBool
                              orientToEye = TRUE)
                         ~SbSphereSheetProjector()

          Methods from class SbSphereProjector:

     SbVec3f             projectAndGetRotation(const SbVec2f &point,
                              SbRotation &rot)
     virtual SbRotation  getRotation(const SbVec3f &point1, const SbVec3f
                              &point2)
     void                setSphere(const SbSphere &sph)
     const SbSphere &    getSphere() 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
     SbSphereSheetProjector projects a window space point (usually based on
     the mouse location) onto the surface of a sphere with a hyperbolic sheet
     draped over it. This allows smooth transitions onto and off of the
     sphere. Two projected points can produce a rotation about the sphere's
     center. When the mouse position projects on to the sheet, the rotations
     will be as if the sheet is being dragged, causing the sphere to roll
     beneath it.

     Incremental changes (delta rotation) can be computed during interactive
     sessions. Sphere projectors are typically used to write interactive 3D
     manipulators and viewers.
METHODS
                         SbSphereSheetProjector(SbBool orientToEye = TRUE)
                         SbSphereSheetProjector(const SbSphere &sph, SbBool
                              orientToEye = TRUE)
          Constructors. The first uses a default sphere centered at the origin
          with radius 1.0; the sphere is supplied in the second. The
          orientToEye parameter determines whether the sheet is perpendicular
          to the eye, or perpendicular to the sphere's Z axis. Setting that
          parameter to TRUE (the default) specifies that the sheet be
          perpendicular to the eye, which is most often the desired behavior.

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

                         ~SbSphereSheetProjector()
          Destructor.


FILE FORMAT/DEFAULTS
     SphereSheetProjector {
     }

SEE ALSO
     SbCylinderProjector, SbCylinderPlaneProjector,
     SbCylinderSectionProjector, SbCylinderSheetProjector, SbLineProjector,
     SbPlaneProjector, SbSpherePlaneProjector