We closed this forum 18 June 2010. It has served us well since 2005 as the ALPHA forum did before it from 2002 to 2005. New discussions are ongoing at the new URL http://forum.processing.org. You'll need to sign up and get a new user account. We're sorry about that inconvenience, but we think it's better in the long run. The content on this forum will remain online.

Index › Programming Questions & Help › OpenGL and 3D Libraries › What's the use of upx,upy and upz

JScriptChan Junior Member Offline Posts: 57	What's the use of upx,upy and upz Feb 21st, 2010, 4:45am   In the method camera(),there are three parameters named 'upx,upy,upz'.I don't know what their use is,help!
	more joy,more practice

Quark Senior Member Offline Posts: 411 UK	Re: What's the use of upx,upy and upz Reply #1 - Feb 21st, 2010, 7:50am   These define the vector that is the up direction, the usual values are [0,1,0] changing the these values can effectively rotate the view.

JScriptChan Junior Member Offline Posts: 57	Re: What's the use of upx,upy and upz Reply #2 - Feb 21st, 2010, 3:50pm   Grateful. Some site to see more specifications,i.e.,what does +\-Ei  stand for(Ei denotes the 3 dimensional vector whose entries are all zero except for the ith entry)?
	more joy,more practice