'shpe' <name|!> ['pln' <P1> <P2> <P3>] | ['cyl' <P1> <P2> <R1>|con'|sph']This keyword is used to create a shape which can be used to define the interiour of surfaces or to be used as a target for projections (see proj) or to split entities (see split). A plane shape is defined with the parameter ``pln'' followed by the names of three points:
!
'' instead of a name. See also ``qshp'' for the mouse controlled definition of shapes.