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Index › Programming Questions & Help › Syntax Questions › how to read time integers
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how to read time integers? (Read 271 times)
rrrr
how to read time integers?
Jan 25th, 2009, 8:58am  
hello,
i am using second(), minute(), and hour() and some coded vector shapes i created to represent numbers for a clock.

i was wondering what do i need to use to read the separate numbers such as the "0" and "8" in the seconds "4:13:08"?
do i need to use arrays?

here's some of the code. it's too long to post. any help is appreciated! thanks!


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


void setup(){
 size(500,694);
 smooth();
 bg = loadImage("casio.jpg");
}

void draw(){
 background(bg);
 colon();
   
 pushMatrix();
 translate(-65,-12);
 hourSpot1();
 popMatrix();
 
 pushMatrix();
 translate(-32,-12);
 hourSpot2();
 popMatrix();
}

void hourSpot1(){
 
 if ((h == 10) || (h==11) || (h==12) || (h==22) || (h==23) || (h==24)){
   num1();  
 }

}


//draw numbers for hour spot2
void hourSpot2(){
 
 if (h == 24){
   num2();  
 }
 if (h == 1){
   num1();  
 }
 if (h == 2){
   num2();  
 }
 if (h == 3){
   num3();  
 }
 if (h == 4){
   num4();  
 }

 if (h == 5){
   num5();  
 }
 
 if (h == 6){
   num6();  
 }
 if (h == 7){
   num7();  
 }
 if (h == 8){
   num8();  
 }
 if (h == 9){
   num9();  
 }
 if (h == 10){
   num0();  
 }
 if (h == 11){
   num1();  
 }
 if (h == 12){
   num2();  
 }
 if (h == 13){
   num1();  
 }
 if (h == 14){
   num2();  
 }
 if (h == 15){
   num3();  
 }  
 if (h == 16){
   num4();  
 }
 if (h == 17){
   num5();  
 }
 if (h == 18){
   num6();  
 }
 if (h == 19){
   num7();  
 }
 if (h == 20){
   num8();  
 }
 if (h == 21){
   num9();  
 }
 if (h == 22){
   num0();  
 }
 if (h == 23){
   num1();  
 }
 if (h == 24){
   num2();  
 }

}
void num1(){
   pushMatrix();

   pushMatrix();
   translate(16,2);
   vertDashRTop();
   popMatrix();

   pushMatrix();
   translate(16,22);
   vertDashRBott();
   popMatrix();

   popMatrix();
}

void vertDashRTop(){
 fill(0);
 noStroke();
 smooth();
 beginShape();
 vertex(0,4);
 vertex(4,0);
 vertex(4,18);
 vertex(0,14);
 endShape();
}
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PhiLho 
Re: how to read time integers?
Reply #1 - Jan 25th, 2009, 11:02am  
It is simple...
Code:
void hourSpot1(){
  
  if ((h == 10) || (h==11) || (h==12) || (h==22) || (h==23) || (h==24)){
    num1();  
  } else {
    num0();  
  }
 
}

I see a little inefficiency in your code, for hourSpot2(), which is slow (although it doesn't really matter here, to be honest) because you shouldn't test h after finding a value (if it is 2 it won't be 13) - this can be addressed by adding else before each if (except the first, of course!).
But still, it isn't very readable and hard to maintain (proof: 24 is tested twice! Wink).
I suggest you use the switch construct, perfect for these cases:
Code:
switch (h) {
case 1:
case 11:
case 13:
case 23:
  num1();
  break;
case 2:
case 12:
case 14:
case 24:
  num2();
  break;
case 3:
case 15:
  num3();
  break;
case 4:
case 16:
  num4();
  break;
case 5:
case 17:
  num5();
  break;
case 6:
case 18:
  num6();
  break;
case 7:
case 19:
  num7();
  break;
case 8:
case 20:
  num8();
  break;
case 9:
case 21:
  num9();
  break;
case 10:
case 22:
  num0();
  break;
}

Both faster than cascaded ifs, particularly your form (switch jumps directly at the right case) and easier to understand (and smaller).

Exercice: handle option for 24hrs display (I am used to that!). :-D
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WWW  
rrrr
Re: how to read time integers?
Reply #2 - Jan 25th, 2009, 9:35pm  
thanks so much! it worked!

my last questions is:

how do i constantly have the time updated in the window? so far, i can only get the time to update when i refresh and run the app again (imagine the seconds not moving).

this is what i have in my draw():


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

void setup(){
 size(500,694);
 smooth();
 bg = loadImage("casio.jpg");
}

void draw(){
 background(bg);
 colon();

 pushMatrix();
 translate(-65,-12);
 hourSpot1();
 popMatrix();

 pushMatrix();
 translate(-32,-12);
 hourSpot2();
 popMatrix();

 pushMatrix();
 translate(12,-12);
 minSpot1();
 popMatrix();

 pushMatrix();
 translate(45,-12);
 minSpot2();
 popMatrix();

 pushMatrix();
 scale(0.8);
 translate(96,-5);
 secSpot1();
 popMatrix();

 pushMatrix();
 scale(0.8);
 translate(126,-5);
 secSpot2();
 popMatrix();
}
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PhiLho 
Re: how to read time integers?
Reply #3 - Jan 25th, 2009, 10:31pm  
Make the declarations like that:
Code:
int s;
int m;  
int h;

And at the start of draw(), just init the variables:
Code:
s = second();
m = minute();  
h = hour();
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WWW  
rrrr
Re: how to read time integers?
Reply #4 - Jan 25th, 2009, 10:39pm  
wow you are really helpful! i'm on my way to slowly learning processing thanks to you! thanks so much again!
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