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							SbSphereProjector(3IV)

NAME
     SbSphereProjector (SbSphProj) - sphere projector

INHERITS FROM
     SbProjector > SbSphereProjector

SYNOPSIS
     #include <Inventor_c/projectors/SbSphereProjector.h>

     typedef SbSphereProjector	SbSphProj

	  Functions from class SbSphereProjector:

     SbVec3f		 SbSphProjProjectGetRot(SbSphProj *this, const SbVec2f
			      *point, SbRotation *rot)
     SbRotation		 SbSphProjGetRot(SbSphProj *this, const SbVec3f
			      *point1, const SbVec3f *point2)
     void		 SbSphProjSetSph(SbSphProj *this, const SbSphere *sph)
     const SbSphere *	 SbSphProjGetSph(const SbSphProj *this)
     void		 SbSphProjSetOrientToEye(SbSphProj *this, SbBool
			      orientToEye)
     SbBool		 SbSphProjIsOrientToEye(const SbSphProj *this)
     void		 SbSphProjSetFront(SbSphProj *this, SbBool isFront)
     SbBool		 SbSphProjIsFront(const SbSphProj *this)
     SbBool		 SbSphProjIsPointInFront(const SbSphProj *this, const
			      SbVec3f *point)

	  Functions from class SbProjector:

     SbVec3f		   SbSphProjProject(SbSphProj *this, const SbVec2f
				*point)
     void		   SbSphProjSetViewVol(SbSphProj *this, const
				SbViewVolume *vol)
     const SbViewVolume *  SbSphProjGetViewVol(const SbSphProj *this)
     void		   SbSphProjSetWorkSpace(SbSphProj *this, const
				SbMatrix *space)
     const SbMatrix *	   SbSphProjGetWorkSpace(const SbSphProj *this)
     SbProjector *	   SbSphProjCopy(const SbSphProj *this)

DESCRIPTION
     SbSphereProjector is an abstract base class for projectors that use a
     sphere in their projection. Sphere projectors are typically used to write
     interactive 3D manipulators and viewers.

FUNCTIONS
     SbVec3f		 SbSphProjProjectGetRot(SbSphProj *this, const SbVec2f
			      *point, SbRotation *rot)
	  Apply the projector using the given point, returning the point in
	  three dimensions that it projects to. This also returns in rot a
	  rotation on the surface of the sphere from the last projected point
	  to this one. The passed point should be normalized (i.e. lie in the

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SbSphereProjector(3IV)

	  range [0.0,1.0]), with (0,0) at the lower-left.

     SbRotation		 SbSphProjGetRot(SbSphProj *this, const SbVec3f
			      *point1, const SbVec3f *point2)
	  Get a rotation given two points on this sphere projector. The
	  rotation will be on the surface of the sphere.

     void		 SbSphProjSetSph(SbSphProj *this, const SbSphere *sph)
     const SbSphere *	 SbSphProjGetSph(const SbSphProj *this)
	  Set and get the sphere on which to project points. The default
	  sphere has radius 1.0.

     void		 SbSphProjSetOrientToEye(SbSphProj *this, SbBool
			      orientToEye)
     SbBool		 SbSphProjIsOrientToEye(const SbSphProj *this)
	  Set and get whether the projector should always be oriented towards
	  the eye. Set to FALSE if the tolerance should be evaluated in
	  working space.

     void		 SbSphProjSetFront(SbSphProj *this, SbBool isFront)
     SbBool		 SbSphProjIsFront(const SbSphProj *this)
     SbBool		 SbSphProjIsPointInFront(const SbSphProj *this, const
			      SbVec3f *point)
	  Set and get whether the projector should intersect the half of the
	  sphere that faces the eye. Set to FALSE if the projector should
	  intersect with the rear half.

FILE FORMAT/DEFAULTS
     SphereProjector {
     }

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

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