comp.lang.idl-pvwave archive: archive » Re: how to define theta and phi of a sphere in IDL

Home » Public Forums » archive » Re: how to define theta and phi of a sphere in IDL

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: how to define theta and phi of a sphere in IDL [message #68587 is a reply to message #68586]

Sat, 14 November 2009 22:11

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

nisha katyal writes:

> No, actually i do not want to define it that way. I want to define
> x,y,z cordinates in terms of r,theta,phi. i.e
> x=r*sin(theta)cos(phi)
> y=r*cos(theta)sin(phi)
> z=r*cos(theta)
>
> I don not kno the difference in defining theta and phi....

Well, maybe a picture will help:

http://en.wikipedia.org/wiki/Spherical_coordinate_system

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

Report message to a moderator

[Message index]

		Re: how to define theta and phi of a sphere in IDL By: penteado on Sat, 14 November 2009 22:20
		Re: how to define theta and phi of a sphere in IDL By: David Fanning on Sat, 14 November 2009 22:11
		Re: how to define theta and phi of a sphere in IDL By: nisha katyal on Sat, 14 November 2009 21:33
		Re: how to define theta and phi of a sphere in IDL By: David Fanning on Sat, 14 November 2009 21:18

Previous Topic:	how to define theta and phi of a sphere in IDL
Next Topic:	Merge polygons using IDL

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Oct 10 23:09:48 PDT 2025

Total time taken to generate the page: 0.72253 seconds