Curve: ID:<ID>, <3D>, <is planar> on photos used <p1> unused <p2>.
• <ID> is the ID number of the Curve object
• <3D> indicates if the curve has a valid computed 3D position and shape.
• <is planar> appears if the curve is set to "planar" (which means the curve is projected onto the best fit plane so as to make it perfectly flat). A curve can be set to planar by checking the "planar" checkbox in the curve's properties. <is planar> will not appear in the status bar if the curve has not been set to "planar".
• <p1> is the list of photographs the Curve’s mark appears on.
• <p2> is the list of unused photographs the Curve’s mark appears on.