Hi Richard,

I am really not happy with old stuff like NEC-Cards. And I do not want
do a lot of work. But a minimum of command set must be interpreted.
For the translation of primitive objects (#SP3, #SP4, #Horn, #Box,
#Tube, #Pipe, #SPArc), I am only using simple CM, CE, GW, SP, SC and
GM cards.
For symbols (variables) I am using only the extension SY of 4nec2.
Any other cards, that can not be detected from the parser, they are
simply passed through without changing. Of course, some comment line
transformation must also be done. Thats all.
Complex data type structures would explode the amount of work. I want
to keep the pre-processor as simple as possible. The pre-processor is
a NEC-processor and not a compiler.

However, there are some good ideas built in:
- fully symbolic (SY abc=..) NEC-code generation or hard wired
(calculated) NEC-code
- SP3 (triangle), SP4 (quadrilateral) can be divided into more small
peaces (segmentation)
- easy to use primitive objects
- complex (hierarchical) object transformation (move, rotation,
scaling does not work due to NEC limitation)
- surface-patch or wire-mode support, without changing the model
- hotspots, where parts of structures or locations can be masked out
(-----!)
- generator modules (parabolic reflector, helix, etc.)
- program control commands
- programable antenna models

Again, I am not re-inventing C. I am only using the syntax whenever
possible. That is the difference.

Now, many old neglected deposits from the pre-processor must be
redesigned and improved. I am doing this step by step. Of course, a
good BNF notation and implementation would simplfy many things. I will
do this for the future version may be.

Regards,
Aziz