Help with patches.

I am just starting to _try_ to use patches. Will some one please explain a
couple of things for me:

1) For an arbitrary patch shape, how does the program know what shape to use.
Looking at the example it looks like it knows where other patches are and
conforms.

SP 0 0 10 0 7.3333 0. 0. 38.4
SP 0 0 10 0 0. 0. 0. 38.4
SP 0 0 10 0 -7.3333 0. 0. 38.4

forms 3 patches I assume square. But that does not agree with the circumference.
If you have 12 patches around the circumference each patch width should be
approx. 26 (314.15/12 patches). Do I use this and the area to come up with the
hight? Or going at it from the other way. Assuming a width of 26 (for each
pathc) and I need an overall hight of 4.5(divided by 3 patches = 1.5) to get
an area of 39 (I rounded the numbers).

GM 0 1 0. 0. 30.

rotats 30 deg. No problem.

SP 0 0 6.89 0. 11. 90. 0. 44.88
SP 0 0 6.89 0. -11. -90. 0. 44.88

Creats the top and bottom patch. How did it know to not create a full wedg? How
did it know where to make the patch corrners?

GR 0 6

Create the rest of the cylindrical structure. No problem

SP 0 0 0. 0. 11. 90. 0. 44.89
SP 0 0 0. 0. -11. -90. 0. 44.89

These are realy square according to the docs. Do they overlap the other
patches?

forgive me if these are basic questions but I have not used patches before.

-- 
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Peter D. Richeson                    | "I don't believe in a no-win   |
Email: richesop_at_matrix.hv.boeing.com |  scenaro."                     |
Phone  (205)461-2603                 |    - Admiral James T. Kirk     |
http://matrix.hv.boeing.com/~richesop|                                |
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