Learning Processing: Chapter 10: Example 10-4: Implementing a Timer

Example

// Learning Processing
// Daniel Shiffman
// http://www.learningprocessing.com

// example 10-4: Implementing a timer

int savedTime;
int totalTime = 5000;

void setup() {
  size(200,200);
  background(0);
  savedTime = millis();
}

void draw() {
  // Calculate how much time has passed
  int passedTime = millis() - savedTime;
  // Has five seconds passed?
  if (passedTime > totalTime) {
    println( " 5 seconds have passed! " );
    background(random(255)); // Color a new background
    savedTime = millis(); // Save the current time to restart the timer!
  }
}

Comments (2)

iyam

what is a exactly a timer for??
http://www.learningprocessing.com Daniel Shiffman

A timer is typically used to trigger an event at a given point in time. For example in a game, you might allow only 30 seconds for a level to be played and use a timer to determine when the level has ended.