How to make millis() count down from a number?

Programming Questions

nicholas68

How to make millis() count down from a number?

in Programming Questions • 11 months ago

Hi, I am quite new so please go easy.

I have working code that counts down, but it is from 0. I want to try and get millus() to start at 20 instead of 0 as my game has a time limit. Is there a way to do this?

Thanks

//Timer Variables
int m;
int starttime;
int seconds;
void setup() {
size(600, 600);
}
void draw() {
background(255);
//Milliseconds time counter converted to Seconds
m = millis();
seconds = -m / 1000;
// when game started make timer 20
starttime = 20 + seconds;
//Display Timer
fill(0);
textSize(50);
text(seconds, 80, 80);
}

Replies(3)

GoToLoop

Re: How to make millis() count down from a number?

11 months ago

Hey! How about this?

private static final byte countdown = 10;
private static int seconds, startTime;

void setup() {

    size(200, 100);
    fill(0);
    textSize(50);

    startTime = millis()/1000 + countdown;
}

void draw() {
    background(255);

    seconds = startTime - millis()/1000;

    if (seconds < 0)    startTime = millis()/1000 + countdown;
    else                text(seconds, 80, 80);
}

ijeoma

Re: How to make millis() count down from a number?

11 months ago

I renamed your variables and moved somethings around...

int begin;
int duration;
int time;
void setup() {
size(600, 600);
textSize(50);
fill(0);
begin = millis();
time = duration = 20;
}
void draw() {
background(255);
if (time > 0) time = duration - (millis() - begin)/1000;
text(time, 80, 80);
}
void keyPressed() {
begin = millis();
time = duration;
}

nicholas68

Re: How to make millis() count down from a number?

11 months ago

Thanks guys, looks like I will be able to achieve what I want to achieve using the above code.

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