How to draw OUTLINES on 3D shapes? [REPOST]

• To: mathgroup at christensen.cybernetics.net
• Subject: [mg1638] How to draw OUTLINES on 3D shapes? [REPOST]
• From: Zorro <berriz at husc.harvard.edu>
• Date: Sat, 8 Jul 1995 03:15:27 -0400
• Organization: Harvard University, Cambridge, Massachusetts

```From reading Mr. Fairley's reply to my earlier post, I realized that I
had not been entirely clear, so here is (I hope) a clearer statement
of the problem.

How can I get Mathematica to draw 3D shapes (specifically, spheres and
cylinders) as "filled in outlines"?  By "outline" I mean that of the
2D representation (as shown on the computer screen) of the 3D object.
For example, whereas a 2D representation of a cylinder would look
something like
__________
()_________)

the *outline* of this representation would look like
__________
(__________)

Similarly, for a cube, a 2D representation would be
______
/     /|
/_____/ |
|     | |
|     | /
|_____|/

and the outline of this representation would be
______
/      |
/       |
|       |
|       /
|______/

It's important to note that I'm not referring to the silhouette (which
would be, for example, the 2D figure obtained by filling in the
outline above:

////////
/////////
/////////
/////////
////////

) but to the actual 1-dimensional countour we use to represent the
*boundary* of the silhoutte.

Z.

```

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