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Index › Programming Questions & Help › Syntax Questions › pixels.length - upgrading code from 068 to Latest
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pixels.length - upgrading code from 068 to Latest (Read 1132 times)
Markavian
pixels.length - upgrading code from 068 to Latest
May 4th, 2005, 3:47pm  
Hi,

I was upgrading some old code up from 068 to the latest edition - I keep getting the following error (see below) whenever I have the call pixels.length in my code.

Any idea why? Is there something general I can do in my code to get round this? I'm currently going through my code replacing all pixels.length with width*height.

Code:

java.lang.NullPointerException
	at Temporary_9176_9016.a_deposit(Temporary_9176_9016.java:118)
	at Temporary_9176_9016$Particle.step(Temporary_9176_9016.java:92)
	at Temporary_9176_9016.draw(Temporary_9176_9016.java:153)
	at processing.core.PApplet.display(PApplet.java:1073)
	at processing.core.PGraphics.requestDisplay(PGraphics.java:362)
	at processing.core.PApplet.run(PApplet.java:918)
	at java.lang.Thread.run(Unknown Source)
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Markavian
Re: pixels.length - upgrading code from 068 to Lat
Reply #1 - May 4th, 2005, 3:49pm  
(update)
After comparing the two reference manuals I noticed that in 087 I apparently need to be calling loadPixels() and updatePixels() before I can use the pixels array. I'll see if that gets my code working.
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fjen
Re: pixels.length - upgrading code from 068 to Lat
Reply #2 - May 4th, 2005, 5:41pm  
you are aware that this stuff is covered here:

http://processing.org/faq/changes.html

right?
F
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