gauge clock UPDATED

gauge clock

created a class to draw a simple gauge, then used it to show the time

screen shot:

Update:
- added scale values
- scale quotation can be altered at creation

code:

Gauge second, minute, hour;
int secold, minold, hourold;

void setup(){
  size(790, 210);
  second = new Gauge(250, 0, 59, 5, "second"); //(width, begin, end, quotation scale, name gauge)
  minute = new Gauge(250, 0, 59, 5, "minute");
  hour = new Gauge(250, 0, 11, 3,  "hour");
  secold = 100;  //val can never be 100, first run will always draw
  minold = 100;
  hourold = 100;
}

void draw(){
  //to save resource, only redraw when time has changed
  if (second() != secold){
    second.update(second());
    pushMatrix();
    translate(530, 10);
    second.display();
    popMatrix();
    secold = second();
  }
  if (minute() != minold){
    minute.update(minute());
    pushMatrix();
    translate(270, 10);
    minute.display();
    popMatrix();
    minold = minute();
  }
  if (hour() != hourold){
    //time received is 24 hour notation, gauge has scale of 12
    if (hour() <= 11){
      hour.update(hour());
    } else {
      hour.update(hour()-12);
    }
    pushMatrix();
    translate(10, 10);
    hour.display();
    popMatrix();
    hourold = hour();
  }
}

class Gauge{
  PVector gsize;  //width & height gauge
  PVector gscale;  //start & end value scale
  PVector gneedle; //length & angle needle
  int gsteps;
  float gline;
  String gname;
   
  Gauge(float tempx, float templow, float temphigh, float templine, String tempname){
    float gwidth = tempx;
    float gheight = 26*tempx/35;
    float glow = templow;
    float ghigh = temphigh;
    gline = templine;
    gname = tempname;
    gsteps = int(temphigh - templow) + 1;
    gsize = new PVector(gwidth, gheight);
    gscale = new PVector(glow, ghigh);
    gneedle = new PVector(5*gsize.y/8, map(second(), 0, 59, radians(35), radians(145)));
  }
 
  void display(){
    noStroke();
    //backcover
    fill(50);
    rect(0, 0, gsize.x, gsize.y);
    fill(255);
    textAlign(CENTER);
    textSize(14);
    text(gname, gsize.x/2, 15);
    //scale
    stroke(255, 200);
    strokeWeight(2);
    for (int i = 0; i < gsteps; i++){
      pushMatrix();
      translate(gsize.x/2, 11*gsize.y/12);
      rotate(PI + map(i, gscale.x, gscale.y, radians(35), radians(145)));
      if (i%gline == 0){
        line(gneedle.x-5, 0, gneedle.x+5, 0);
        translate(gneedle.x+10, 0);
        rotate(HALF_PI);
        textSize(9);
        text(i, 0, 0);
      } else {
        point(gneedle.x, 0);
      } 
      popMatrix();
    }
    noStroke();
    //needle
    stroke(255, 0, 0);
    strokeWeight(3);
    pushMatrix();
    translate(gsize.x/2, 11*gsize.y/12);
    rotate(PI + gneedle.y);
    line(0, 0, gneedle.x, 0);
    popMatrix();
    noStroke();
    //frontcover
    fill(150, 180);
    rect(0, 4.5*gsize.y/6, gsize.x, 1.5*gsize.y/6);
    fill(255, 0, 0);
    ellipseMode(CENTER);
    ellipse(gsize.x/2, 11*gsize.y/12, 10, 10);
  }
 
  void update(float tempgval){
    float gvalue = tempgval;
    gneedle.y = map(gvalue, gscale.x, gscale.y, radians(35), radians(145));
  }
}