Can someone see what I'm doing wrong/not seeing here?? Because I cant!!!!

Programming Questions

noahsdev

Can someone see what I'm doing wrong/not seeing here?? Because I cant!!!!

in Programming Questions • 1 month ago

OK so let me explain what it is first. This is just one line that determines the y position of a rect. So it is getting a time value from the timeArray in the form: 15.45, it then determines how long between that time and the current time. It is then scaled so that for every hour there is 100px. So, for example if there is a 2 hour difference the value should be 200.

In the comment it is broken down and explained, what am i doing wrong? I println'd the value and it is giving me -1100 haha. What am i doing wrong?

float x = ((((int(endTimeArray[eventNumberInArray])+(((endTimeArray[eventNumberInArray]-int(endTimeArray[eventNumberInArray]))*pow(10,2))/60))-(hour()+(minute()/60)))*60)/60)*100);
/*
a = endTimeArray[eventNumberInArray]-int(endTimeArray[eventNumberInArray])
Takes the time from the array (e.g. 12.15) and minuses the integer of it so: 12.15-12 and were left with 0.15.
b = a *pow(10,2)
Now we make .15 into the minutes by multiplying by 100: 0.15*100 = 15.
c = b/60
Divide by 60 so that we make it into a real decimal rather than the amount of minutes so: 15/60 = 0.25 hours.
f = int(endTimeArray[eventNumberInArray])+c
This makes it into the amount of hours so it is now 12.25 hours.
d = minute()/60
to make the minutes into a decimal. For example 30 --> .5
e = hour()+d
Now hour is added to the decimal of a minute so for example: 11.5 hours.
g = f-e
Using previous examples: 12.25-11.5 = 0.75. Its a 0.75 Hour difference
h = e*60
Multiply 0.75*60 so that it goes back into minutes. 0.75*60 = 45
i = h*100/60
Now it is scaled so that every hour is equal to 100. 45*100/60 = 75.
*/

If I haven't explained something please let me know and I will explain it better.

Replies(3)

tfguy44

Re: Can someone see what I'm doing wrong/not seeing here?? Because I cant!!!!

1 month ago

What jumps right out at me is that you're doing things like x/60, and expecting the result to be a float.

Compare:

30/60

30/60f

30/60.0

noahsdev

Re: Can someone see what I'm doing wrong/not seeing here?? Because I cant!!!!

1 month ago

Thanks I finally got it and yes I think that was the main problem. I took it apart and slowly pieced it back together haha.

This is what I got in the end:

round(((float)((float)((int(endTimeArray[eventNumberInArray])+((float)((endTimeArray[eventNumberInArray]-int(endTimeArray[eventNumberInArray]))*pow(10,2))/60))-(hour()+((float)minute()/60)))*60)/60)*100);

GoToLoop

Re: Can someone see what I'm doing wrong/not seeing here?? Because I cant!!!!

1 month ago

Your code is too convoluted for me to grasp it in a quick glance.
So instead, I'm gonna try to understand what you said you wanted.

If I understand you, you want to map time elapsed into vertical movement, right?
For program's time elapsed, we've got millis().
And for scaling of a range of limits into another we've got map().

So that's what I've come up with:

Oops! Too slow to post this. HEHE!

final static int HOUR_TO_MILLIS = 60*60*1000;
final static int MOVES_PER_HOUR = 100;
final static int DIM = 40;

void setup() {
  size(300, 400);
  frameRate(1);
  fill(#FFFF00);
  stroke(0200);
  strokeWeight(4);
}

void draw() {
  final float movement = map(millis(), 0, HOUR_TO_MILLIS, 0, MOVES_PER_HOUR);
  background(0);
  rect(width/2 - DIM/2, movement % height, DIM, DIM);
}

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