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Index › Suggestions & Bugs › Software Bugs › background() in setup() problems
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background() in setup() problems (Read 945 times)
Ricard
background() in setup() problems
Apr 21st, 2006, 5:14pm  
Hi,

I run Linux and I'm using processing-0114.  I'm having a problem when I use the background() command inside the setup() block with the OPENGL renderer and in NORMAL MODE, as opposed to PRESENT MODE where it works just fine.

This might not be a bug, it might rather be some misconfiguration of my card or something but I can't find the problem.

Here's a sample code:
Quote:


import processing.opengl.*;

void setup(){
 size(200,200,OPENGL);
 background(255);
}

void draw(){
 translate(width/2, height/2);
}




This results in a black window.
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fry
Re: background() in setup() problems
Reply #1 - Apr 21st, 2006, 6:20pm  
i wonder if it's related to this feller:
http://dev.processing.org/bugs/show_bug.cgi?id=282

also try setting the framerate in case it's a weird thread sync issue that things are starving out. unfortunately i haven't been able to replicate this stuff on my linux machine yet and have been too swamped to check into it further.
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Ricard
Re: background() in setup() problems
Reply #2 - Apr 21st, 2006, 7:25pm  
You might be right, it must have something to do with sync.

Because when I run the following code several succesive times I will get most of the time a green screen (what's drawn in the setup()), but some of the times I get a black screen with a diagonal red line (what's drawn in the draw()).  All this without changing the sketch.

Quote:


import processing.opengl.*;

void setup(){
 size(200,200,OPENGL);
 framerate(30);

 background(255);

 fill(0,225,0);
 noStroke();
 rect(0,0,width,height);
}

void draw(){
 translate(width/2, height/2);
 stroke(255,0,0);
 line(-width/2, -height/2, width/2, height/2);
}
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fry
Re: background() in setup() problems
Reply #3 - May 12th, 2006, 5:58pm  
k, i'm pretty sure this is tied to bug #282, so i'm gonna close this thread and we can follow up there.
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