GEOMETRY LCMB lnam lnam1 lnam2 [lnam3] [lnam4]

        

This command is used to define a line as a combination of up to 4 existing lines.

lnam = name for the combined line, which is used for later references to it, for example when a surface is defined.

lnamn = names of the existing basic lines that form the combined line.

The GEOMETRY LCMB command is used to define or change a combined line which consists of two, three or four basic lines, defined previously with the GEOMETRY LINE command. This concept is of great value for the definition of natural sides for surfaces.

Observe that the basic lines must be given in consecutive order and be connected by common points.

Return Level: GEOMETRY LCMB

Notes:

1.

Potential problem
Users should exercise caution when sweeping combined lines as it is possible to create discontinuities between adjacent surfaces depending on how the combined line is used. Currently there is not a combined surface equivalent to combined lines.

Usually such model discontinuities can be removed with CONSTRUCT MERGE or MESH MERGE.

Examples:

1.

GEOMETRY LCMB LC1 L1 L2

Creates a combined line LC1 from two existing lines L1 and L2 which are joined at a point.

2.

GEOMETRY LCMB LC2 L1 L2 L3

Creates a combined line LC2 from three existing lines L1, L2, and L3 which are joined at two points.