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Index › Programming Questions & Help › Syntax Questions › millis()

annemarie YaBB Newbies Offline Posts: 43	millis() Jan 21st, 2006, 11:59pm   Hi, I know that millis() is keeping track of how long processing has been running. How do I use millis() to trigger an event every x milliseconds? e.g. I want the random(10, 100) to generate the radius of a circle every x milliseconds. -and can I reset millis(), so that it counts from 0 again while the program is running?

watz Full Member Offline Posts: 202

Re: millis() Reply #1 - Jan 22nd, 2006, 2:11am   try something like this: Code: void float last,rad,interval; void setup() { size(300,300); last=millis(); interval=300; // 300 msecs rad=random(10, 100); } void loop() { if(millis()-last>interval) { rad=random(10, 100); last=millis(); } ellipse(width/2,height/2, rad,rad); } you can't guarantee that it will occur exactly on the millisecond, but this way you check if more time than x msecs has passed. if so, then you carry out the action and reset the reference time.

marius watz // unlekker // code & form // Generator.x