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							 SbPlaneProjector(3IV)

NAME
     SbPlaneProjector (SbPlnProj) - plane projector

INHERITS FROM
     SbProjector > SbPlaneProjector

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

     typedef SbPlaneProjector  SbPlnProj

	  Functions from class SbPlaneProjector:

     SbPlaneProjector *	 SbPlnProjCreate(SbBool orient = FALSE)
     SbPlaneProjector *	 SbPlnProjCreatePln(const SbPlane *plane, SbBool
			      orient = FALSE)
     void		 SbPlnProjDelete(SbPlnProj *this)
     void		 SbPlnProjSetPln(SbPlnProj *this, const SbPlane
			      *plane)
     const SbPlane *	 SbPlnProjGetPln(const SbPlnProj *this)
     void		 SbPlnProjSetOrientToEye(SbPlnProj *this, SbBool
			      orientToEye)
     SbBool		 SbPlnProjIsOrientToEye(const SbPlnProj *this)
     SbVec3f		 SbPlnProjGetVecMouse2(SbPlnProj *this, const SbVec2f
			      *mousePosition1, const SbVec2f *mousePosition2)
     SbVec3f		 SbPlnProjGetVecMouse1(SbPlnProj *this, const SbVec2f
			      *mousePosition)
     void		 SbPlnProjSetStartPosMouse(SbPlnProj *this, const
			      SbVec2f *mousePosition)
     void		 SbPlnProjSetStartPosPt(SbPlnProj *this, const SbVec3f
			      *point)

	  Functions from class SbProjector:

     SbVec3f		   SbPlnProjProject(SbPlnProj *this, const SbVec2f
				*point)
     void		   SbPlnProjSetViewVol(SbPlnProj *this, const
				SbViewVolume *vol)
     const SbViewVolume *  SbPlnProjGetViewVol(const SbPlnProj *this)
     void		   SbPlnProjSetWorkSpace(SbPlnProj *this, const
				SbMatrix *space)
     const SbMatrix *	   SbPlnProjGetWorkSpace(const SbPlnProj *this)
     SbProjector *	   SbPlnProjCopy(const SbPlnProj *this)

DESCRIPTION
     SbPlaneProjector projects the mouse onto a plane. This is typically used
     to write interactive 3D manipulators and viewers.

FUNCTIONS
     SbPlaneProjector *	 SbPlnProjCreate(SbBool orient = FALSE)
	  Constructor. The default plane passes through the origin and is

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SbPlaneProjector(3IV)

	  oriented perpendicular to the Z axis.

     SbPlaneProjector *	 SbPlnProjCreatePln(const SbPlane *plane, SbBool
			      orient = FALSE)
	  Constructor which is passed a plane. If orient to eye is TRUE, the
	  plane will be reoriented to the eye.

     void		 SbPlnProjDelete(SbPlnProj *this)
	  Destructor.

     void		 SbPlnProjSetPln(SbPlnProj *this, const SbPlane
			      *plane)
     const SbPlane *	 SbPlnProjGetPln(const SbPlnProj *this)
	  Set and get the plane to use.

     void		 SbPlnProjSetOrientToEye(SbPlnProj *this, SbBool
			      orientToEye)
     SbBool		 SbPlnProjIsOrientToEye(const SbPlnProj *this)
	  Set and get whether the projector should be oriented towards the
	  eye. If orientToEye is set to TRUE, the given plane's direction is
	  ignored, and the plane will be oriented to the eye. It will pass
	  through the same point from the origin defined by the original dir *
	  dist. Set to FALSE if the plane's direction should remain in working
	  space.

     SbVec3f		 SbPlnProjGetVecMouse2(SbPlnProj *this, const SbVec2f
			      *mousePosition1, const SbVec2f *mousePosition2)
	  Get a vector on this plane given two normalized mouse positions.

     SbVec3f		 SbPlnProjGetVecMouse1(SbPlnProj *this, const SbVec2f
			      *mousePosition)
	  Get a vector given the current mouse point. Uses the last point on
	  this projector from the previous call to  SbPlnProjGetVecMouse1(),
	  SbPlnProjSetStartPosMouse(), or SbPlnProjSetStartPosPt(). Do not use
	  this if the working space transform is changing since the new point
	  will be in a different space than the old one.

     void		 SbPlnProjSetStartPosMouse(SbPlnProj *this, const
			      SbVec2f *mousePosition)
	  Set the initial mouse position.

     void		 SbPlnProjSetStartPosPt(SbPlnProj *this, const SbVec3f
			      *point)
	  Set the initial position from a point on the projector.

FILE FORMAT/DEFAULTS
     PlaneProjector {
     }

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							 SbPlaneProjector(3IV)

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

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