Hi i am trying to make some text pop up each letter at a time by using a string while my framerate is at 60 however i can not use delay() because it would influence the framerate. How can i do this without using delay?
p.s i have tried to use millis() but i can not find an example i can use
Thank you for the code. I will see if i can use it
i just made a delux version:
revision acc next post @neilcsmith
// timer variables
long startT, stopT=5000;
boolean diagT = true;
int typT = 1; // 0 OFF, 1 ONESHOT, 2 CONTI
void setup() {
//size(500, 500);
println("operation:\nrestart oneshot timer key [t]\nconti timer key [c]\ntimer OFF key [q]\ndelta key [+] or [-]\nprinting key [p]");
theTime("first start");
}
void theTime(String info) {
if ( diagT ) println(info+"_time_"+year()+"-"+month()+"-"+day()+" "+hour()+":"+minute()+":"+second());
}
void myTimer() {
boolean doit = false;
if ( millis() > startT + stopT ) {
if ( typT == 1 ) { // ONE SHOT
theTime("_oneshot");
doit = true;
typT = 0; // timer OFF
} else if ( typT == 2) { // CONTI
// https://discourse.processing.org/t/help-with-delay-millis-without-influencing-the-framerate/8153/5
// startT = millis(); // auto restart
startT += stopT;
theTime("_conti");
doit = true;
}
if ( doit ) {
if ( diagT ) println("+ + what else you need me to do now?");
//____________________________________________ your code
}
}
}
void draw() {
background(200,200,0);
myTimer();
}
void keyPressed() {
if ( key == 't' ) { // manual restart ONESHOT timer
typT = 1;
startT = millis();
theTime("_start");
}
if ( key == 'c' ) { // manual change to CONTI timer
typT = 2;
startT = millis();
theTime("_start");
}
if ( key == 'q' ) { // manual change to timer OFF
typT = 0;
if ( diagT ) println("timer OFF");
}
if ( key == 'p' ) { // enable disable diag printing
diagT = ! diagT;
println("printing "+diagT);
}
if ( key == '+' ) { // increase
if ( stopT < 1000 ) stopT += 100;
else if ( stopT >= 1000 ) stopT += 1000;
println("set "+stopT);
}
if ( key == '-' ) { // decrease
if ( stopT > 1000 ) stopT -= 1000;
else if ( stopT <= 1000 ) stopT -= 100;
else if ( stopT < 0 ) stopT = 10;
println("set "+stopT);
}
}
and also a “nano” version:
// v01 https://discourse.processing.org/t/help-with-delay-millis-without-influencing-the-framerate/8153
// v02 change from
// startT = millis(); // auto restart
// to: startT += stopT;
// thanks to @neilcsmith
// https://discourse.processing.org/t/inaccurate-time-intervals-for-a-metronome/2463/10
// v03 also change use nano instead millis
// timer variables
long startT=0, msec = 1000000L, stopT=(long) 5000*msec; // 5 sec
boolean diagT = true;
int typT = 2; // 0 OFF, 1 ONESHOT, 2 CONTI
// user variables
int usercounter = 0;
void setup() {
size(200, 200);
frameRate(120);
println("operation:\nrestart oneshot timer key [t]\nconti timer key [c]\ntimer OFF key [q]\ndelta key [+] or [-]\nprinting key [p]");
startT = System.nanoTime();
theTime("first start");
fill(0,0,200);
}
void theTime(String info) {
if ( diagT ) println(info+"_time_"+year()+"-"+month()+"-"+day()+" "+hour()+":"+minute()+":"+second());
}
void myTimer() {
boolean doit = false;
// if ( millis() > startT + stopT ) {
if ( System.nanoTime() > startT + stopT ) {
if ( typT == 1 ) { // ONE SHOT
theTime("_oneshot");
doit = true;
typT = 0; // timer OFF
} else if ( typT == 2) { // CONTI
// https://discourse.processing.org/t/help-with-delay-millis-without-influencing-the-framerate/8153/5
// startT = millis(); // auto restart
startT += stopT;
theTime("_conti");
doit = true;
}
if ( doit ) {
// println("+ + what else you need me to do now?");
//____________________________________________ your code
usercounter++;
}
}
}
void draw() {
background(200,200,0);
myTimer();
if ( diagT ) text(nf(frameRate,1,1)+" FPS; dT "+stopT/msec+" msec; T: "+typT,5,height-10); //
if ( diagT ) text(usercounter,width/2,height/2);
}
void keyPressed() {
if ( key == 't' ) { // manual restart ONESHOT timer
typT = 1;
startT = System.nanoTime();
theTime("_start");
}
if ( key == 'c' ) { // manual change to CONTI timer
typT = 2;
startT = System.nanoTime();
theTime("_start");
}
if ( key == 'q' ) { // manual change to timer OFF
typT = 0;
if ( diagT ) println("timer OFF");
}
if ( key == 'p' ) { // enable disable diag printing
diagT = ! diagT;
println("printing "+diagT);
}
if ( key == '+' ) { // increase
if ( stopT < 1000*msec ) stopT += 100*msec;
else if ( stopT >= 1000*msec ) stopT += 1000*msec;
println("set "+stopT/msec);
}
if ( key == '-' ) { // decrease
if ( stopT > 1000*msec ) stopT -= 1000*msec;
else if ( stopT <= 1000*msec ) stopT -= 100*msec;
if ( stopT < 0 ) stopT = 0;
println("set "+stopT/msec);
}
}
You might also want to have a look at Inaccurate time intervals for a Metronome
The code looks good apart from the auto restart with startT = millis() - this will accumulate errors, although may be what you want - fixed rate or fixed delay?
and just i looked up your
System.nanoTime()
is actually not very clear for me.
i come from the arduino side and have made some ?multi tasking? time scheduler? structures there
and learned also that the call “millis” takes too long,
so the basic loop i just made only by counters ( revolving job1=1001; job2=1002;…)
and used millis and check serial as rare as possible.
for this timing critical things in processing i not yet have a feeling, even i work mostly
on my 40euro computer Raspberry PI with 1GB ram for cpu+gpu
so i should learn the hard way.
ok: as long have println’s in draw and not use noSmooth(); in setup,
i think it is all not that critical.
I prefer using nanoTime() as it’s a more accurate clock. On Windows for example the millis() clock can have a coarse resolution (only changes value every 16ms). The call to nanoTime() is computationally more expensive, but on a desktop computer (including the Pi!) it’s really not worth being concerned about compared to everything else Processing is doing.