NAME

       SbLineProjector — line projector

INHERITS FROM

       SbProjector > SbLineProjector

SYNOPSIS

       #include <Inventor/projectors/SbLineProjector.h>

          Methods from class SbLineProjector:

                         SbLineProjector()
                         ~SbLineProjector()
     void                setLine(const SbLine &line)
     const SbLine &      getLine() const
     virtual SbVec3f     getVector(const SbVec2f &mousePosition1, const SbVec2f &mousePosition2)
     virtual SbVec3f     getVector(const SbVec2f &mousePosition)
     void                setStartPosition(const SbVec2f &mousePosition)
     void                setStartPosition(const SbVec3f &point)

          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

       SbLineProjector projects a 2D point, typically the location of the cursor, onto a 3D line.

METHODS

                         SbLineProjector()
                         ~SbLineProjector()
          Constructor  and  destructor. The default line passes through the origin and is aligned
          with the Y axis.

     void                setLine(const SbLine &line)
     const SbLine &      getLine() const
          Set and get the line on which to project 2D points.

     virtual SbVec3f     getVector(const SbVec2f &mousePosition1, const SbVec2f &mousePosition2)
          Get a vector on this line given two normalized mouse points.

     virtual SbVec3f     getVector(const SbVec2f &mousePosition)
          Get a vector given the current mouse point. Uses the last point on this projector  from
          the  previous call to getVector() or setStartPostion().  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                setStartPosition(const SbVec2f &mousePosition)
          Set the initial position from a mouse position.

     void                setStartPosition(const SbVec3f &point)
          Set the initial position from a point on the projector.

SEE ALSO

       SbCylinderProjector,         SbCylinderPlaneProjector,         SbCylinderSectionProjector,
       SbCylinderSheetProjector,  SbPlaneProjector,  SbSpherePlaneProjector,   SbSphereProjector,
       SbSphereSectionProjector, SbSphereSheetProjector

                                                                           SbLineProjector(3IV)()