GEOMETRY SURFACE ONSHAPE shnam angval

        

This command is used to create 3 or 4 sided surfaces within irregular multi-sided plane polygons. Additional lines and combined lines will be created where necessary. When there is more than one polygon to be automatically subdivided all the polygons must be contiguous (i.e. connected with one or more common lines). All the points and lines defining the polygon(s) must lie on the FEMGEN shape(s) specified. Currently this command only works with plane shapes.

When FEMGEN encounters an angle greater than (180 + `angval') an extra line will be generated to split the internal angle. `Angval' can be given a negative value. In general, a larger value of `angval' will result in a larger number of combined lines being formed.

shnam = name of the plane or ALL plane shapes may be specified.

angval = The value to be used in deciding whether to split internal angles.

Return Level: GEOMETRY SURFACE

 

Figure 2.85: Original polygons and results of different values of `angval'.

Examples:

1.

GEOMETRY SURFACE ONSHAPE PLANE1 3

Creates surfaces within contiguous multi-sided plane polygons that lie on plane PLANE1. Extra lines will be generated to split internal angles that are greater than 183 degrees.

See also the following commands

'CONSTRUCT SHAPE'
'LABEL GEOMETRY SURFACES'
'UTILITY DELETE SURFACES'
'UTILITY TABULATE GEOMETRY SURFACES'
'VIEW GEOMETRY'