Processing 1.0 - Processing Discourse - delay() and the draw() method

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Index › Programming Questions & Help › Syntax Questions › delay() and the draw() method

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delay() and the draw() method (Read 821 times)

Matt Lefevre

delay() and the draw() method
Sep 25^th, 2009, 1:35pm

I found the page on delay()
web ref:processing.org/reference/delay_.html
but there is no info here on how to use it outside of the draw() method

What is proper way to write this program so that it draws a line every half second

void setup()
{
size(500, 500);
}

void draw()
{
background(0);
for (int i = 2; i < 150; i++) {
line(0,i*sin(i)*5, 500, i*cos(i)*3);
stroke(160, 0, 0);
delay(500);
}

}

PhiLho

Re: delay() and the draw() method
Reply #1 - Sep 25^th, 2009, 2:26pm

delay() is to be used rarely... In general, draw() heartbeat is used to count time.
Code:

int count = 2;

void setup()
{
 size(500, 500);
 background(0);
 stroke(160, 0, 0);
 frameRate(2); // Twice per second
}

void draw()
{
//   background(0);
//   for (int i = 2; i < 150; i++) {
  if (count < 150)
  {
     line(0, count * sin(count) * 5, 500, count * cos(count) * 3);
     count++;
   }
}

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