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Topic: Repaint background in for-loop (Read 337 times) |
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mogens
Guest
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Repaint background in for-loop
« on: Mar 3rd, 2004, 2:04pm » |
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Sorry if this is a silly question.
But how do I force the background to refresh from within a "for"-loop?
This does not seem to work (draw a line at the final position. Not a line moving across the screen)
for (int x=0; x<100; x++)
{
background(100);
line (x,0,x,100);
}
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TomC
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Re: Repaint background in for-loop
« Reply #1 on: Mar 3rd, 2004, 3:05pm » |
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As I understand it, everything is automatically double buffered, and the buffers are flipped after the loop function returns.
There might be a sneaky undocumneted way to do it, but without fighting processing I think the effect you want is best achieved like so:
Code:
int x = 0;
void loop() {
background(100);
line (x,0,x,100);
x++;
if (x >= 100) {
x = 0;
}
}
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mogens
Guest
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Re: Repaint background in for-loop
« Reply #2 on: Mar 3rd, 2004, 8:53pm » |
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You're right. I can achieve the moving line. But I was woundering why it didn't work from within the for-loop.
I guess you are right - it must be the buffering!
MO
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