Points

Points can be described, normally by assigning coordinates to individual keywords in the local coordinate system of the panel (U and V) or of the global ship coordinate system (X,Y,Z).

There is also an option make references to all coordinates of a topology point in one assignment by a number of special keywords (UV, U1V, U2V, XYZ, X1Y, X2Y, XTY) which accept only references to topology points.

<point>::= <by_coord> | <point_ref>

<by_coord>::= (U = <coord>, V = <coord>) |
              (X = <coord>, Y = <coord>) |
              (X = <coord>, Z = <coord>) |
             (Y = <coord>, Z = <coord>)

A point may be defined in the uv-system or by two coordinates in the xyz-system.

<point_ref>::= UV | XYZ = P<start>[([<step>]) <end>

Thus, the layout is equal to that of the coordinate references to topology points with the exception that no offsets are allowed.

Remarks:

1. Complete references to topology points may be used also in other contexts where coordinates are fed in, for example, in assignments to the keywords ORI, VAX and VAX in the bracket statement and in CURVE statements (without any keywords). for further information, see these statements.

2. Point references by UV, U1V, U2V may define also a direction.

   <point_1>	has the same syntax as <point> with '1' added to all coordinate keywords and UV is replaced by U1V, XYZ by X1Y.
   <point_2>	has the same syntax as <point> with '2' added to all keywords and UV is replaced by U2V, XYZ by X2Y.
   Example:
   1.    U=1000, V=2000 2.    U=LP1, V=P5+100 3.    UV=P5 (equal to: U=P5, V=P5) 4.    X2Y=P3 (equal to for example,: X2=P3,Z2=P3)