Re: [brlcad-users] explanations for the numbers in make shape.s commands

[David L. <dlo...@gm...>]

Paul,
 I am working on uploading a MediaWiki version of the MGED Help command
pages.  Currently I am finished with A-L and part way through M.  Maybe it
could help a bit:

http://brlcad.org/wiki/Main_Page

Also, in lieu of the 'make' command, why don't you try the 'in' command and
MGED will walk you through the creation:

mged> in
Enter name of solid: myTGC
Enter solid type: tgc
Enter X, Y, Z of vertex: 0 0 0
Enter X, Y, Z of height (H) vector: 100 0 0
Enter X, Y, Z of vector A: 0 0 100
Enter X, Y, Z of vector B: 0 100 0
Enter scalar c: 10
Enter scalar d: 10


Now, if you use the 'up' arrow, it will show you the resultant command:

mged> in myTGC tgc 0 0 0 100 0 0 0 0 100 0 100 0 10 10


Now, I do agree that the number sequences for the individual primitive types
*should* be documented and I will definetly add that to my "TODO" list.

Thanks!


David Loman
Apprentice Software Developer Extraordinaire
Retired Journeyman Target Describer Extraordinaire



-----Original Message-----
From: brl...@li... [mailto:
brl...@li...] On Behalf Of Csanyi Pal
Sent: Monday, August 18, 2008 12:55 AM
To: brl...@li...
Subject: [brlcad-users] explanations for the numbers in make shape.s
commands

Hi,

I'm using the  BRLCAD_VolumeII.pdf to study again the BRL-CAD. It's splendid
tutorial, but I'm wondering why isn't there an explanation for the numbers
in the 'make shape.s' commands, like this bellow, that I added for my Wiki
on my Debian system:

*** Right Elliptical Cylinder (rec)
A,B,V,C,D
-Vertex, V (a mértani test középpontja)
-Height vector, H
-Major axis for the ellipse
-Minor axis for the ellipse

Stored as a tgc, where vectors A and C have equal lengths, B and D have
equal lengths, and all vectors are perpendicular to H.

the button:
mged> in btn.s rec 8 30 36 0 3 0 4 0 0 0 0 2

What is the meaning of these 12 number?
***************************************

**** the (x y z) coordinates of the Vertex (8 30 36)
**** the (x y z) coordinates of the hights end point (0, 3, 0)
**** the (x y z) coordinates of the A vectors end point (4 0 0)
**** the (x y z) coordinates of the B vectors end point (0 0 2)

mged> l btn.s
btn.s:  truncated general cone (TGC)
 V (8, 30, 36)
 Top (8, 33, 36)
 H (0, 3, 0) mag=3
 H direction cosines=(90, 0, 90)
 H rotation angle=90, fallback angle=0
 A (4, 0, 0) mag=4
 B (0, 0, 2) mag=2
 C (4, 0, 0) mag=4
 D (0, 0, 2) mag=2
 AxB direction cosines=(90, 180, 90)
 AxB rotation angle=270, fallback angle=0

Where to find these explanations?

Maybe one must to accomplish oneself these informations?

Any advices will be appreciated!

--
Regards, Paul Csanyi
http://www.freewebs.com/csanyi-pal/index.htm

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