Hello all,

I was wandering if I could get some advice on how to do some things for this processing sketch

Code:

int bloodsugar = 25;

float dayx;
float monthy;
float bsSize;
float bsAlpha;

void setup(){
  size (400,400);
  noLoop();
  
}


void draw(){
  dayx=map(day(),1,31,0,width); 
  monthy=map(month(),1,12,0,height);
  bsSize = map(bloodsugar,1.0,25.0,10,width/4);
  bsAlpha = map(bloodsugar,1.0,25.0,0,255);
  
  
  fill(255,0,0,bsAlpha);
  
  rect(dayx,monthy,bsSize,bsSize);

} 

So what i'd like to do is load in a text file and use the floats contained in it to create the squares and, depending on the amount, 1.0 being low and 25.0 being high adjust the alpha.

The rect x and y is following the day and month using system time, ideally i'd like to contain that information in the text file(i'm assuming) so it would allow for multiple rects.

I really hope i'm making sense, I've been following the the Processing Handbook which is great but the loadStrings doesn't seem to work so any advice on how to go about it and even some sample code would be great.

Thanks,

BeefyC

Thanks for the reply Scott,

I've played around with the loadStrings and it is working well, However i have a few questions;

Currently I'm using four elements for use in a rect but I'm not sure how I can get the rect to alter it's alpha depending on the number in the Width and Height of the rect.

Code:

String[] lines;
int index = 0;

void setup(){
  size (1000,1000);
  lines = loadStrings("blood.txt"); 
}


void draw(){
if (index < lines.length) {
  String[] pieces = split(lines[index], '\t');
  if (pieces.length == 4) {
    int x = int(pieces[0]) * 2;
    int y = int(pieces[1]) * 2;
    int w = int(pieces[2]) * 2;
    int h = int(pieces[3]) * 2;      
    fill(255,0,0);
  rect(x,y,w,h);
  
  }
  index =index +1;

}
}

 

and the txt file

Code:

1	1	6	6
3	1	10	10
3	1	5	5
4	1	9	9
5	1	19	19 

so in my last sketch I had mapped the values of 1.0(low) and 25.0(high) to 0 - 255 for the alpha but that was for just one variable for the "bloodsugar" result whereas this is reading alot of them.

Thanks,

BeefyC

Thanks for the code you provided, it worked and I'm getting the results I was looking for.

However, I'm having trouble using the map function from the first sketch. Because I'm using month and days for the x and y coordinates respectively, and also defining a variable for the X,Y,W,H I'm not sure how to include the map function within it. Does that make sense?

to illustrate;

Code:

float x = float(pieces[0]) * 2;
    float y = float(pieces[1]) * 2; 

the x coords are very close to the side: in my previous sketch they were mapped to the width and height but had their own variable. How would I incude the map function within that? if that is the way it should go of course.

Thanks for your help

Replace hxxp with http***
hxxp://img269.imageshack.us/img269/4396/sketchv.jpg

Code:

5	1	2.4	2.4
5	1	18.3	18.3
5	1	6.4	6.4
5	1	8.5	8.5
5	1	13.4	13.4
5	2	4.6	4.6
5	2	6.4	6.4
5	2	3.8	3.8
5	2	9.1	9.1
5	2	19.6	19.6
5	2	15.7	15.7
5	3	3.5	3.5
5	3	13.5	13.5
5	3	3.6	3.6	
5	3	16.3	16.3
5	4	12.0	12.0
……(more)

 

Thats the txt file i'm loading in, obviously it's using the month(5) for the x coord....thats just 5 pixels in and it's hugging the side. Now, looking at my previous sketch I was using the system time which may have let me get the position so far along.

anyway, i'll stop confusing both of us!

main issue is to make it more aesthetically pleasing but retain the month and day data for the x and y coords.

In this section:

Code:

    int x = int(pieces[0]) * 2;
    int y = int(pieces[1]) * 2;
    int w = int(pieces[2]) * 2;
    int h = int(pieces[3]) * 2;   

replace the 'magic numbers' with variables, one for position and one for scale.  You'll then need to figure out the values required to scale your results to your table (should involve some fairly basic mathematics
You may also need to add an offset to get what you want:

Code:

    int x = offsetX + int(pieces[0]) * multiplier;
    int y = offsetY + int(pieces[1]) * multiplier;
    int w = int(pieces[2]) * scaler;
    int h = int(pieces[3]) * scaler; 

The multiplier determines the spread across the table - basically each increment of x/y will be placed the multiplier number of pixels to the right/down (hint: not necessarily the figure you want but I tried it with 100 - i.e. 2 is way too small) - the offset will determine where it starts from.