QPOLY                                                       Menu: PEDIT / INFO
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Queries the type of polygon and converts the polygon from one type to another.

        1.   (CHAR) option: t-check type, l-check loops, p-no. of points
        2. * (IND) polygon to query
        3. * (Y/N) confirm choice
     if option `t' is selected:
     if the polygon is a symbol polygon:
        4.   (Y/N) polygon is a SYMBOL polygon, change to SURFACE ?
     if the polygon is a surface polygon:
        4.   (Y/N) polygon is a SURFACE polygon, change to SYMBOL ?
     if polygon was at any time part of a prism:
        4.   ! this polygon is or was PART OF A PRISM, unchangeable !
     if option `l' is selected:
     if polygon is closed:
        4.   ! all loops of the polygon are CLOSED
     if polygon has open loops:
        4.   (Y/N) last polygon loop is open, wish to close last ? <y>
     if inner polygon has open loop:
        4.   ! polygon has open inner loops !

     if option `p' is selected:
             ?? No. of polygon points: NNN (press: <ENTER> )
             where NNN is the number of points in the polygon.

Description:
This command queries the type of polygon and converts the polygon from one
type to another (option `t'), checks whether the polygon has open loops
(option `l'), and queries the number of points in it (option `p').
Option `t'A polygon, during its creation, appears as a transparent wire
(symbol) entity in the solid module, until it is closed. It then appears as
an opaque surface polygon. This option enables you to query the current status
of the polygon and convert it from one to another.
Indicate the polygon. The system tells you the polygon's current type and asks
you if you wish to convert it.
You cannot use this command on polygons that are or were part of a prism. If
you attempt to do so, the following message will appear:
! this polygon is/or was a PART OF A PRISM, unchangeable!
Option `l' Checks whether a polygon is closed or open, and enables you to
close it if it is open. Only a closed polygon may be used as a surface polygon
in the solid module or be used to generate a solid body.
Indicate the polygon. The system will tell you if it is closed or open. If it
is open the system will ask you if you wish to close it.
Option `p'This option queries the number of points in an indicated polygon.
The maximum number of points allowed in one polygon is 200.
Indicate (and confirm) the polygon you want to query.
In all options, the polygon operated on becomes the current polygon.
If the entity indicated is not a polygon the following message appears:
! entity is not a polygon
