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					       SbCylinderSectionProjector(3IV)

NAME
     SbCylinderSectionProjector (SbCylSectProj) - cylinder-section projector

INHERITS FROM
     SbProjector > SbCylinderProjector > SbCylinderSectionProjector

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

     typedef SbCylinderSectionProjector
			 SbCylSectProj

	  Functions from class SbCylinderSectionProjector:

     SbCylinderSectionProjector *
			 SbCylSectProjCreate(float edgeTol = .9, SbBool
			      orientToEye = TRUE)
     SbCylinderSectionProjector *
			 SbCylSectProjCreateCyl(const SbCylinder *cyl, float
			      edgeTol = .9, SbBool orientToEye = TRUE)
     void		 SbCylSectProjDelete(SbCylSectProj *this)
     void		 SbCylSectProjSetTol(SbCylSectProj *this, float
			      edgeTol)
     float		 SbCylSectProjGetTol(const SbCylSectProj *this)
     SbBool		 SbCylSectProjIsWithinTol(SbCylSectProj *this, const
			      SbVec3f *point)

	  Functions from class SbCylinderProjector:

     SbVec3f		 SbCylSectProjProjectGetRot(SbCylSectProj *this, const
			      SbVec2f *point, SbRotation *rot)
     SbRotation		 SbCylSectProjGetRot(SbCylSectProj *this, const
			      SbVec3f *point1, const SbVec3f *point2)
     void		 SbCylSectProjSetCyl(SbCylSectProj *this, const
			      SbCylinder *cyl)
     const SbCylinder *	 SbCylSectProjGetCyl(const SbCylSectProj *this)
     void		 SbCylSectProjSetOrientToEye(SbCylSectProj *this,
			      SbBool orientToEye)
     SbBool		 SbCylSectProjIsOrientToEye(const SbCylSectProj *this)
     void		 SbCylSectProjSetFront(SbCylSectProj *this, SbBool
			      isFront)
     SbBool		 SbCylSectProjIsFront(const SbCylSectProj *this)
     SbBool		 SbCylSectProjIsPointInFront(const SbCylSectProj
			      *this, const SbVec3f *point)

	  Functions from class SbProjector:

     SbVec3f		   SbCylSectProjProject(SbCylSectProj *this, const
				SbVec2f *point)
     void		   SbCylSectProjSetViewVol(SbCylSectProj *this, const
				SbViewVolume *vol)

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SbCylinderSectionProjector(3IV)

     const SbViewVolume *  SbCylSectProjGetViewVol(const SbCylSectProj *this)
     void		   SbCylSectProjSetWorkSpace(SbCylSectProj *this,
				const SbMatrix *space)
     const SbMatrix *	   SbCylSectProjGetWorkSpace(const SbCylSectProj
				*this)
     SbProjector *	   SbCylSectProjCopy(const SbCylSectProj *this)

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.

FUNCTIONS
     SbCylinderSectionProjector *
			 SbCylSectProjCreate(float edgeTol = .9, SbBool
			      orientToEye = TRUE)
     SbCylinderSectionProjector *
			 SbCylSectProjCreateCyl(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.

     void		 SbCylSectProjDelete(SbCylSectProj *this)
	  Destructor.

     void		 SbCylSectProjSetTol(SbCylSectProj *this, float
			      edgeTol)
     float		 SbCylSectProjGetTol(const SbCylSectProj *this)
	  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

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					       SbCylinderSectionProjector(3IV)

	  is .1, the projector is a slice of the cylinder with radius
	  .1*radius.  Default is .9.

     SbBool		 SbCylSectProjIsWithinTol(SbCylSectProj *this, const
			      SbVec3f *point)
	  Find whether this point on the cylinder or tolerance plane is within
	  tolerance.

FILE FORMAT/DEFAULTS
     CylinderSectionProjector {
     }

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

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