The minute ticker on my clock isn't exactly accurate. What is throwing the location off?

jkornet

The ticker should show the exact minute relative to the width of the window. See "draw minute ticker" at bottom.

color fill1 = (#324D9B);
color fill2 = (#4D65BC);
color fill3 = (#6476CC);
color fill4 = (#7C88E0);
color fill5 = (#8C94F2);
color fill6 = (#9DA9FC);
color fill7 = (#B6C2FF);
color fill8 = (#CCD6FF);

int s = second();
int m = minute();
int h = hour();

int maxRects = 8;

void setup() {
  size(800, 600);
}

void drawRects() {

  noStroke();
  fill(fill1);
  rect(0, 0, width * 1/8, height);
  fill(fill2);
  rect(width * 1/8, 0, width/8, height);
  fill(fill3);
  rect(width * 1/4, 0, width/8, height);
  fill(fill4);
  rect(width * 3/8, 0, width/8, height);
  fill(fill5);
  rect(width * 1/2, 0, width/8, height);
  fill(fill6);
  rect(width * 5/8, 0, width/8, height);
  fill(fill7);
  rect(width * 3/4, 0, width/8, height);
  fill(fill8);
  rect(width * 7/8, 0, width/8, height);
}

void draw() {

  s = second();
  m = minute();
  h = hour();

  //shift colors on hour
  if (h >= 0 && h < 3) {

    drawRects();
    fill1 = #324D9B;
    fill2 = #4D65BC;
    fill3 = #6476CC;
    fill4 = #7C88E0;
    fill5 = #8C94F2;
    fill6 = #9DA9FC;
    fill7 = #B6C2FF;
    fill8 = #CCD6FF;

    //draw second ticker
    stroke(0);
    strokeWeight(0.5);
    line(0, height/60 * s, width/8, height/60 * s);
  }

  if (h >= 3 && h < 6) {

    drawRects();
    fill1 = #4D65BC;
    fill2 = #324D9B;
    fill3 = #4D65BC;
    fill4 = #6476CC;
    fill5 = #7C88E0;
    fill6 = #8C94F2;
    fill7 = #9DA9FC;
    fill8 = #B6C2FF;

    //draw second ticker
    stroke(0);
    strokeWeight(0.5);
    line(width/8, height/60 * s, width/4, height/60 * s);
  }

  if (h >= 6 && h < 9) {
    println("Day-time!");

    drawRects();
    fill1 = #FFEB52;
    fill2 = #FFE72E;
    fill3 = #FFE200;
    fill4 = #FFE72E;
    fill5 = #FFEB52;
    fill6 = #FFEE6C;
    fill7 = #FFF28E;
    fill8 = #FFF5AA;

    //draw second ticker
    stroke(0);
    strokeWeight(0.5);
    line(width/4, height/60 * s, width * 3/8, height/60 * s);
  }

  if (h >= 9 && h < 12) {

    drawRects();
    fill1 = #FFEE6C;
    fill2 = #FFEB52;
    fill3 = #FFE72E;
    fill4 = #FFE200;
    fill5 = #FFE72E;
    fill6 = #FFEB52;
    fill7 = #FFEE6C;
    fill8 = #FFF28E;

    //draw second ticker
    stroke(0);
    strokeWeight(0.25);
    line(width * 3/8, height/60 * s, width/2, height/60 * s);
  }

  if (h >= 12 && h < 15) {

    drawRects();
    fill1 = #FFF28E;
    fill2 = #FFEE6C;
    fill3 = #FFEB52;
    fill4 = #FFE72E;
    fill5 = #FFE200;
    fill6 = #FFE72E;
    fill7 = #FFEB52;
    fill8 = #FFEE6C;

    //draw second ticker
    stroke(0);
    strokeWeight(0.5);
    line(width/2, height/60 * s, width * 5/8, height/60 * s);
  }

  if (h >= 15 && h < 18) {

    drawRects();
    fill1 = #FFF5AA;
    fill2 = #FFF28E;
    fill3 = #FFEE6C;
    fill4 = #FFEB52;
    fill5 = #FFE72E;
    fill6 = #FFE200;
    fill7 = #FFE72E;
    fill8 = #FFEB52;

    //draw second ticker
    stroke(0);
    strokeWeight(0.5);
    line(width * 5/8, height/60 * s, width * 3/4, height/60 * s);
  }

  if (h >= 18 && h < 21) {
    println("Night-time!");

    drawRects();
    fill1 = #B6C2FF;
    fill2 = #9DA9FC;
    fill3 = #8C94F2;
    fill4 = #7C88E0;
    fill5 = #6476CC;
    fill6 = #4D65BC;
    fill7 = #324D9B;
    fill8 = #4D65BC;

    //draw second ticker
    stroke(0);
    strokeWeight(0.5);
    line(width * 3/4, height/60 * s, width * 7/8, height/60 * s);
  }

  if (h >= 21 && h < 24) {

    drawRects();
    fill1 = #CCD6FF;
    fill2 = #B6C2FF;
    fill3 = #9DA9FC;
    fill4 = #8C94F2;
    fill5 = #7C88E0;
    fill6 = #6476CC;
    fill7 = #4D65BC;
    fill8 = #324D9B;

    //draw second ticker
    stroke(0);
    strokeWeight(0.5);
    line(width * 7/8, height/60 * s, width, height/60 * s);
  }

  //draw minute ticker
  stroke(0);
  strokeWeight(1);
  line((width/24 * h + (width/1440 * m)), 0, 
    (width/24 * h) + (width/1440 * m), height);
}

koogs

Integer division. See Common Questions.

jeremydouglass

e.g. width/8 vs. width/8.0

• https://forum.processing.org/two/discussion/24027/integer-division-why-does-2-5-0