Restart

chrisjj

What language statement will restart the program?

Chrisir

There is no

Instead write your own function which resets all the variables like in setup and before setup

Don’t call setup itself

Chrisir

chrisjj

Except that of course fails to make all the resets that aren't in setup. Global variable initialisations.

Thanks.

Chrisir

Yes, you need to reset the global variables as well (the stuff before setup)

Basically make a function init that you call for reset and also from setup, so that there are no duplicate lines

jeremydouglass

If you want to programmatically reset your sketch, this does most of it:

  void setup{
    // all global variable values must be assigned in setup
    // and the canvas must be cleared
  }
  void reset(){
      frameCount = -1;
  }

Setting frameCount to -1 resets the frameCount -- and when it increments into frame 0, it re-runs setup (without you trying to call it directly). This enables you to re-setup the sketch.

If you also need a millis() runtime that is measured since the last reset, this gets a bit tougher, as millis() itself cannot be reset. However, you can make your own fairly easily.

  int millisLastSetup; // last setup time
  void setup{
    // all global variable values must be assigned in setup
    // and the canvas must be cleared
    millisLastSetup = millis();
  }
  void reset(){
      frameCount = -1;
  }
  void millis2(){
      return millis2() - millisLastSetup;
  }

Now call millis2() to get the time since the last reset, millis() to get total time since launch.

Conversely, if you need to know the total frames (not counting setup) since the sketch started -- (although you almost certainly don't) -- you can add a global variable for that and track it at the beginning of draw.

  int millisLastSetup; // last setup time
  int frameCountTotal;
  void setup{
    // all global variable values must be assigned in setup
    // and the canvas must be cleared
    millisLastSetup = millis();
  }
  void draw(){
    frameCountTotal++;
  }
  void reset(){
      frameCount = -1;
  }
  void millis2(){
      return millis() - millisLastSetup;
  }

That gives you a basic sketch reset based on setup(), with features for accessing either millis and either frameCount. So, for example, you could have a sketch that you can reset as often as you want, but also does something after x minutes of execution time.

Demo sketch:

// 2018-01-15 Processing 3.3.6
// forum.processing.org/two/discussion/25970/restart

int millisLastSetup; // last setup time
int frameCountTotal;
int counter;

void setup() {
  println("(re)starting " + millis());
  millisLastSetup = millis();
  counter = 0;
}
void draw() {
  frameCountTotal++;
  background(0);
  text(status(), 10, 12);
  counter = counter+1;
  if (mousePressed) {
    reset();
  }
}
String status() {
  return "CURRENT:\n  " +
    str(counter) + "\n  " +
    str(frameCount) + "\n  " +
    str(millis2()) + "\n" +
    "TOTAL:\n  " +
    str(frameCountTotal) + "\n  " +
    str(millis());
}
void reset() {
  frameCount = -1;
}
int millis2() {
  return millis() - millisLastSetup;
}

chrisjj

Thanks. And then one would have to ecode the global variable initialisers.

jeremydouglass

Right -- you need to put any initializations in setup. Unless you don't -- notice that I intentionally did not initialize frameCountTotal in setup.