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Index › Programming Questions & Help › Programs › Large delay between mouse motion and cursor motion
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Large delay between mouse motion and cursor motion (Read 1558 times)
shann
Large delay between mouse motion and cursor motion
Jun 1st, 2010, 4:31am  
I observed a large delay between mouse motion (figured by the cursor on the screen) and the motion of objects the position of which is given by MouseX and MouseY (tested on the linux version of processing)
What causes that large delay ? Is there a way to cancel it ?
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PhiLho 
Re: Large delay between mouse motion and cursor motion
Reply #1 - Jun 1st, 2010, 4:39am  
This Topic was moved here from Software Bugs by PhiLho .
Software Bugs section is the wrong place to ask questions. The wrong place to post messages, actually, please read the stickies at the top of each section!
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Smitty
Re: Large delay between mouse motion and cursor motion
Reply #2 - Jun 1st, 2010, 7:44am  
I just tried the following on my Linux laptop running Ubuntu 9.10 with Processing 1.1.  There's a little bit of skippy-ness ocassionally, like a one-frame lag, but nothing significant or persistent.

See if this sketch gives you the issues you've been observing, and maybe we can narrow this down.

Quote:
void setup() {
  size(300, 300);
}

void draw() {
  background(0);
  fill(255);
  ellipse(mouseX, mouseY, 20, 20);
}
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shann
Re: Large delay between mouse motion and cursor motion
Reply #3 - Jun 1st, 2010, 1:10pm  
Thank you for your test. I remember I observed a lag longer than only a single frame.
(But I tried to run your sketch on  my new netbook (Dell Latitude 13)... an it crashed the X server (the intel driver ?). So I have to try it on another computer... and to search in the "bugs" topic of this forum.)

I have to find a way to measure this lag.
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