No Subject

[fowler]

The 2-gons would be the connections between the vertices.  Here is a
two-dimensional example of what I had in mind:

A1 = 0 0 
A2 = 5 0
B1 = 1 1
B2 = 1 2
B3 = 1 3
C1 = 2 4
C2 = 2 5

A1 is connected to B1 and B2
A2 is connected to B3
B3 is connected to C1 and C2

Your data file would look like this:

# Standard header info
OFF
7 5 7

# List of vertices - z coordinate is set to 0

# A1
0 0 0

# A2
5 0 0 

# B1
1 1 0

# B2
1 2 0

# B3
1 3 0

# C1
2 4 0

# C2
2 5 0

# List of polygons connecting vertices in the form 
# <number of vertices> <index of vertex 1 in list of vertices> 
# <index of 2> <index of 3> ....
2 0 2
2 0 3
2 1 4
2 4 5
2 4 6

Hope this helps.

-Celeste

Celeste Fowler			email:  fowler at geom.umn.edu
The Geometry Center		phone:  ((555) 555-5555
1300 South Second Street
Minneapolis, MN  55454


============================================================

Date: Mon, 8 Feb 93 12:19:04 EST
From: smlee at ams.sunysb.edu (Sang-moon Lee)
To: fowler at geom


	
	Dear, Celeste Fowler.
	
	Hello,  Sang-moon Lee again from SUNY at Stony Brook.
	
	Thank you for your kindness reply.
	How are you and how was your weekend? We had 3-inches snow here.
	I bet you had a snow there, too.

	For your reply on my friday mail, you mention 2-gon is perfectly o.k.
	To do 3-D, for my case, one vertices could have 1~5 or more
	"branches" to the next slice nodes.  What do you think?

	For example: vertices = d h k ....

		first slice 		second slice
	          A			 A region in 1st slice contains 
					 2(c & d) regions in 2nd slice.

in picture:
		   A	  B		 1st slice
		  / \     |
		 c   d    e		 2nd slice
		/   / \  / \
	       f   g    h   i		 3rd slice
	      / \   \    \ /
	     j   k   l    m 		 4th slice
	      \ / \   \ /

			so on.....


	I gave a 2-D example, but please think as 3-D case.
	In 3-D, it should gives vertex(node), branch, and levels.
	So, I made data set that the data contains from 1st slice to last one
	with all the connection with nodes.
	DATA : A C F J ...
	       A C F K ...
	       A D G L ...
	       A D H M ...
	       B E H M ...
	       B E I M ...

	To use "geomview", how should I set my data to use it?
	Can you give me a example?

	Thank you very much.

					Sincerely yours,

						Sang-moon Lee