Re: How to draw OUTLINES on 3D shapes?
- To: mathgroup at christensen.cybernetics.net
- Subject: [mg1627] Re: How to draw OUTLINES on 3D shapes?
- From: Zorro <berriz at husc.harvard.edu>
- Date: Fri, 7 Jul 1995 00:33:04 -0400
- Organization: Harvard University, Cambridge, Massachusetts
gfairley at wilder.com (Gerard Fairley) writes:
>In comp.soft-sys.math.mathematica Zorro <berriz at husc.harvard.edu> said:
>>Hi. I would like to draw 3D shapes (specifically, spheres and
>>cylinders) as "filled in outlines". For example, a sphere would
>>look like a thin black circle (the outline) around a gray disk (the
>I don't know what you mean; I thought the outline of a sphere was a
No, I mean the 2D outline of the 2D representation (as shown on the
computer screen) of a sphere.
>>Similarly, the outline for a cylinder would be (generally) two
>>parallel lines connected by two half-ellipses, one at each end of
For example, a 2D representation of a cylinder would look something
while its *outline* 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 the 2D figure obtained by filling in the figure above, for
but to the actual 1-dimensional countour we use to represent
the *boundary* of the silhoutte.
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