Talk:Draw a sphere

From Rosetta Code

Task description[edit]

A “sphere cuboid”?? WTF… –Donal Fellows 10:57, 25 March 2011 (UTC)

If I were fooled by the english meaning of that phrase, I would think that the task was to draw a regular cube. However, the image on the PureBasic implementation shows me that at least one person believes differently. --Rdm 16:46, 25 March 2011 (UTC)

Sorry - That was a mispaste. It should just read "sphere".

Markhobley 17:17, 25 March 2011 (UTC)

PureBasic image?[edit]

To my mere untrained Layman's eye, this does not look like a sphere. If anything, I'd say, it looks like a butt.Sgeier 16:37, 25 April 2011 (UTC)

well, it says "animated".. so if you animate the butt, maybe it looks more like a sphere. would be nice if somebody could paste a better picture. --Oenone 12:58, 10 May 2011 (UTC)

Perspective??[edit]

I'm probably just missing something subtle here, but as far as I understand projective geometry, there's no "perspective" involved in rendering a sphere - it looks round no matter how it's projected, no? As opposed to a box that can be sheared or distorted in a number of entertaining ways. Right? Wrong? I'm scratching my head here ...Sgeier

Indeed. But there must be sufficient voodoo to make it not look like a flat circle or disk. Markhobley 22:11, 25 April 2011 (UTC)

Or, you could do it at the PureBasic version. E.g. animate the drawing of the sphere and thereby make it more clear to the user that is is indeed a 3D object presented on the Screen --<Jofur> 05:28, 26 April 2011 (UTC)

You could even use a wireframe mesh! Markhobley 14:00, 26 April 2011 (UTC)

We all know that earth's moon is a sphere.   But because of the lighting (by our sun), it does not look round (except during a full moon), but rather, it looks/appears like a crescent most of the time.   I think that all most of the "ASCII-art" renderings are a depiction of a sphere using a light source (above and to the viewer's left). -- Gerard Schildberger 20:02, 12 April 2012 (UTC)


... And for some perspective levity on the perspective of the perspective:

Without a light source, here are a front & back, top & bottom, left & right views of a small sphere against a light background:

∙ ∙ ∙ ∙ ∙ ∙

-- Gerard Schildberger (talk) 16:47, 15 September 2017 (UTC)