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NAME

       SbSphereProjector -

       The SbSphereProjector class is the abstract base class for mapping to
       spherical surfaces.

       The sphere projectors map 2D points to various surface types based on
       spherical shapes.

SYNOPSIS

       #include <Inventor/projectors/SbSphereProjector.h>

       Inherits SbProjector.

       Inherited by SbSphereSectionProjector, and SbSphereSheetProjector.

   Public Member Functions
       SbVec3f projectAndGetRotation (const SbVec2f &point, SbRotation &rot)
       virtual SbRotation getRotation (const SbVec3f &point1, const SbVec3f
           &point2)=0
       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)

   Protected Member Functions
       SbSphereProjector (const SbBool orienttoeye)
       SbSphereProjector (const SbSphere &s, const SbBool orienttoeye)
       SbBool intersectSphereFront (const SbLine &l, SbVec3f &result)

   Protected Attributes
       SbBool intersectFront
       SbSphere sphere
       SbBool orientToEye
       SbBool needSetup
       SbVec3f lastPoint

Detailed Description

       The SbSphereProjector class is the abstract base class for mapping to
       spherical surfaces.

       The sphere projectors map 2D points to various surface types based on
       spherical shapes.

       See also:
           SbCylinderProjector

Constructor & Destructor Documentation

   SbSphereProjector::SbSphereProjector (const SbBool orienttoeye) [protected]
       Default constructor sets up a sphere at the origin with radius 1.
   SbSphereProjector::SbSphereProjector (const SbSphere & s, const SbBool
       orienttoeye) [protected] Constructor taking an explicit sphere
       projection definition.

Member Function Documentation

   SbVec3f SbSphereProjector::projectAndGetRotation (const SbVec2f & point,
       SbRotation & rot) Project the 2D point to a 3D coordinate on the
       spherical surface, and find the rotation from the last projection to
       this one.
       See also:
           project(), getRotation()

   SbRotation SbSphereProjector::getRotation (const SbVec3f & point1, const
       SbVec3f & point2) [pure virtual] Returns rotation on the projection
       surface which re-orients point1 to point2.
       Implemented in SbSpherePlaneProjector, SbSphereSectionProjector, and
       SbSphereSheetProjector.

   void SbSphereProjector::setSphere (const SbSphere & sph) Set sphere to
       project onto.
   const SbSphere & SbSphereProjector::getSphere (void) const Returns
       projection sphere.
   void SbSphereProjector::setOrientToEye (const SbBool orienttoeye) Sets
       whether or not the projection surface should be oriented towards the
       eye of the viewer. Default is TRUE.
   SbBool SbSphereProjector::isOrientToEye (void) const Returns the state of
       the sphere orientation flag.
   void SbSphereProjector::setFront (const SbBool infront) Set whether to
       intersect with the outside of the sphere (infront equal to TRUE), or
       the inside.
   SbBool SbSphereProjector::isFront (void) const Returns value of the flag
       which decides whether to intersect with the outside or inside of the
       sphere.
   SbBool SbSphereProjector::isPointInFront (const SbVec3f & point) const
       Check if point is on the frontside or the backside of the cylinder.
   void SbSphereProjector::setWorkingSpace (const SbMatrix & space) [virtual]
       Sets the matrix used for converting from the projector’s coordinate
       system to the world coordinate system.
       Reimplemented from SbProjector.

   SbBool SbSphereProjector::intersectSphereFront (const SbLine & l, SbVec3f &
       result) [protected] Intersect line with the SbSphereProjector::sphere
       and place the intersection point (if any) in result. Considers
       setFront() settings.
       Returns TRUE if line actually hits the sphere, FALSE if it doesn’t
       intersect with it.

Member Data Documentation

   SbSphereProjector::intersectFront [protected] Flag which says whether or
       not we should map to the outside or inside of the sphere surface.
   SbSphereProjector::sphere [protected] Projection sphere.
   SbSphereProjector::orientToEye [protected] Which direction the spherical
       surface is oriented.
   SbSphereProjector::needSetup [protected] Set to TRUE whenever the
       projection surface needs to be recalculated according to the setting of
       the SbSphereProjector::orientToEye flag.
   SbSphereProjector::lastPoint [protected] Stores the previously projected 3D
       point.

Author

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