topic Re: VERT, EDGE, and PGON in Libraries & objects

VERT, EDGE, and PGON

Anonymous — Tue, 10 Nov 2009 16:40:01 GMT

Does anyone out there know the magic behind the VERT, EDGE, AND PGON commands. It seems straightforward, and I was hoping to use it to make a small part that can't easily be made from the primitives. I just can't get it to work though. For some reason ArchiCAD keeps telling me the polygon is degenerated. It is only 4 vertexes, 4 edges, and one polygon.

Any help on what I am doing wrong?

BASE
VERT	0.026194, -0.019050, 0.105569		! #1
VERT	0.024847, -0.018152, 0.124430		! #2
VERT	0.192087, -0.020637, 0.099219		! #10
VERT	0.192087, -0.018899, 0.111386		! #11

EDGE	1, 2, -1, -1, 0	! #1
EDGE	3, 4, -1, -1, 0	! #2
EDGE	1, 3, -1, -1, 0	! #3
EDGE	2, 4, -1, -1, 0	! #4


PGON 4, 0, -1, 1, 2, 3, 4

BODY -1

Re: VERT, EDGE, and PGON

Fabrizio Diodati — Tue, 10 Nov 2009 16:49:48 GMT

Try the following one:

BASE
VERT 0.026194, -0.019050, 0.105569 ! #1
VERT 0.024847, -0.018152, 0.124430 ! #2
VERT 0.192087, -0.018899, 0.111386 ! #3
VERT 0.192087, -0.020637, 0.099219 ! #4

EDGE 1, 2, -1, -1, 0 ! #1
EDGE 2, 3, -1, -1, 0 ! #2
EDGE 3, 4, -1, -1, 0 ! #3
EDGE 4, 1, -1, -1, 0 ! #4

PGON 4, 0, -1, 1, 2, 3, 4

BODY -1

friendly
Fabrizio

Re: VERT, EDGE, and PGON

Anonymous — Tue, 10 Nov 2009 16:51:44 GMT

Hi Michael,

I'm not a primitive expert... For me its like the dark side of the force...

But AFAIK, the problem is that the VERT's that define the PGON are not coplanar.

To avoid this you'll have to script each and every PGON with 3 VERTs. Doing this they will always be coplanar.

But I may be wrong.

HTH.

p.s.: Ooops... Never mind. The force is strong in Fabrizio.

Re: VERT, EDGE, and PGON

Anonymous — Tue, 10 Nov 2009 17:19:51 GMT

Thanks Fabrizio and Braza. No I see what I was doing wrong.

Re: VERT, EDGE, and PGON

Fabrizio Diodati — Tue, 10 Nov 2009 18:18:29 GMT

The order is the most important thing and most complex issue.
Thanks Attila Babbits for all his precious advice.

Friendly
Fabrizio

Re: VERT, EDGE, and PGON

Anonymous — Tue, 10 Nov 2009 19:00:10 GMT

This should be explained better in the GDL manual. It appears that the edges need to be defined in the order they are used, which makes using an edge for multiple PGONs impossible. ArchiCAD has been yelling at when when I try to reuse edges, but if I define a new edge it works perfectly.

Thanks again for your help.

Re: VERT, EDGE, and PGON

Erich — Wed, 11 Nov 2009 02:17:05 GMT

This is very well covered in the GDL Handbook from Cad Image. IF you don't have it already it is well worth the investment for refining your DGL (or GDL ) skills.

Re: VERT, EDGE, and PGON

Barry Kelly — Wed, 11 Nov 2009 02:29:14 GMT

Erich wrote:
IF you don't have it already it is well worth the investment for refining your DGL skills.

It's for all of you interesting in the "Dyslexic Geometric Language".
Barry.

Re: VERT, EDGE, and PGON

Erich — Wed, 11 Nov 2009 02:32:31 GMT

Nah, it's just dyslexic typing...