Millis() counter inside a loop

Programming Questions

danieljay

Millis() counter inside a loop

in Programming Questions • 1 month ago

Greetings all!

I am having a bit of a difficult time grasping Millis();

I understand with the example mentioned below how Millis() is implemented in a sketch. I am also aware that Millis begins the minute your sketch launches, so I attempted to implement a counter vairable that everytime the condition is met, the "counter" adds a 1. Problem is counter prints only a "0". code below:

int iDatum;
int counter;
void setup() {
//choose a point 5,000 milliseconds in the future
iDatum=millis()+1000;
timeSinceLastLetter = millis();
ellipse(width/2, height/2, 10, 10);
}
void draw() {
//is it now time?
if (millis()>=iDatum) {
ellipse(random(width), random(height), 10, 10);
//choose another point 5 seconds hence...
iDatum=millis() + 1000;
counter = counter+1;
}

Replies(3)

GoToLoop

Re: Millis() counter inside a loop

1 month ago

Maybe your example tweaked a little might be easier to figure out?

final static int DIM = 20, DELAY = 1000;

int nextTimer, counter;

void setup() {
  size(400, 300);
  background(-1);
}

void draw() {
  if (millis() >= nextTimer) {
    fill((color) random(#000000));
    ellipse(random(DIM, width-DIM), random(DIM, height-DIM), DIM, DIM);
    nextTimer = millis() + DELAY;
    print(++counter + " - ");
  }
}

GoToLoop

Re: Millis() counter inside a loop

1 month ago

A slightly variation:

final static int DIM = 20, DELAY = 1000;

int nextTimer, counter;

void setup() {
  size(400, 300);
  background(-1);
}

void draw() {
  if (millis() < nextTimer)   return;

  fill((color) random(#000000));
  ellipse(random(DIM, width-DIM), random(DIM, height-DIM), DIM, DIM);

  nextTimer = millis() + DELAY;
  print(++counter + " - ");
}

danieljay

Re: Re: Millis() counter inside a loop

1 month ago

Thank you! Exactly what I was looking for.

Top Reply