Comments on: Processing Tutorial: Spherical Coordinates

By: Gauden Galea

Gauden Galea — Wed, 06 Jul 2011 09:10:33 +0000

Thanks for this tutorial. It was invaluable in creating a dynamic logo that has been well-received: http://blog.gaudengalea.com/2011/07/ncd-identity-... You are credited in the code and in my blog post about it.

By: NCD Identity in Processing | Hacking Public Health

NCD Identity in Processing | Hacking Public Health — Tue, 05 Jul 2011 20:46:30 +0000

[...] The sketch shows a wireframe globe rotating in three dimensions above the logo of the Global Action Plan on NCDs, and fragments of the logo are randomly distributed over the surface. The sketch was intended to embody the idea of a ‘global movement’ on NCDs. The sphere is based on a tutorial by Jer Thorp. [...]

By: Charles Lucas

Charles Lucas — Fri, 11 Feb 2011 08:54:43 +0000

It's a small thing, but you neglect to declare mySphere in the example above. So, the first few lines of the main Spherical Coordinate file should be:

import processing.opengl.*;
import java.util.*;

Sphere mySphere; // Declare mySphere

void setup() {
// Code here is executed once, when the app initializes

By: Sergio

Sergio — Wed, 18 Aug 2010 15:03:41 +0000

Messamessa

By: ellobobobo

ellobobobo — Tue, 11 May 2010 02:36:37 +0000

Michael, I am getting the same NulPointerException on the online version. It 'works' here locally with processing-184. I suspect the compiled class is slightly different from the actual code.

Also, there is some OPENGL rendering bug that makes the spheres appear with the right colour for a few seconds, then they become cresents, i.e. completely white except for a small gray cresent. Changing the renderer to P3D works fine.

Personally, I don't like the trails and prefer to have background(255); as the first statement in draw() because it looks 'better' to me

By: Michael

Michael — Sat, 10 Apr 2010 22:08:50 +0000

Maybe its just me, but your sketch is returning a Null Pointer exception. I'm also getting one when replicating the code, any idea why this is?

By: Nik

Nik — Fri, 29 Aug 2008 17:17:52 +0000

Thanks for posting this tutorial – it was very helpful!
And thanks for the inspiration this year at Flashbelt