Can you reset a timer using millis()?

Answers

• SowrCrem

  December 2016 edited December 2016

                  if (level == 1) {
                    dX = dX + 2;
                    time1 = millis()/1000;
                    time = time1;
                  }
                    if (level == 2) {
                      dX = dX + 3;    
                      time2 = millis()/1000;
                      time = time2;
                    }
  
                    if (level == 3) {
                      dX = dX + 3.5;
                      time3 = millis()/1000;
                      time = time3;
                    }
  
• SowrCrem

  December 2016

  dX is the position of a horizontally moving image to the right, and by each level, the speed increases. Please point out my mistakes or improvements if I have any.
• kfrajer

  December 2016

  Can you post all your code? We need to be able to execute it to see what is your approach.

  Kf
• jeremydouglass

  December 2016 Answer ✓

  millis() is always equal to time since the beginning of the sketch starting. Look at these statements from your code:

  time1 = millis()/1000;
  time2 = millis()/1000;
  time3 = millis()/1000;
  

  In every case, you are doing the same thing -- setting a variable to the number of milliseconds since the sketch started. This is why your if statements have no effect.

  You need a pattern more like this (depending on the kind of timer you want, how you want to control it, whether start times or stop time or both are important, etc. etc.):

  float start, runtime;
  
  void setup(){
    start = millis();
  }
  
  void draw(){
    background(0);
    // how long has the sketch been running? millis
    text((float)millis()/1000, 10,height/6);
  
    // when was the timer last started? saved millis variable
    text(start/1000, 10,height/3);
  
    // how long has the timer been running? current millis - saved millis
    runtime = millis() - start;
    text(runtime/1000, 10,height/2);
  }
  
  void keyPressed(){
    // mark a new timer start time
    start = millis();
  }
  
• SowrCrem

  December 2016

  Thanks @jeremydouglass!!!! :)

  I'm so happy now, thanks to everyone who helped me! :3 SC