Processing 1.0 - Processing Discourse - defining color using a txt file

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Index › Programming Questions & Help › Syntax Questions › defining color using a txt file

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defining color using a txt file (Read 535 times)

leanderlike

defining color using a txt file
Jul 9^th, 2009, 12:02pm

hello,

ich have a txt file made of this structure:
11111 #FF00FF
11112 #FF0000
11115 #FF0FF0
and so on.
so first you have a number and seperated by a tab there is a hexcode.
Now inside of my processing sketch one can type a number (like 11111 oder 11112). those are saved in a buffer-string and then converted to an int. And now: When pressing "Enter" i want to fill a rect in the matching number above. so when typing 11111 i want to fill it with FF00FF and so on.
how can i get processing to find the relevant number inside of the sketch?

i once had a different sketch with this txt file....
01 #FF0000
02 #FFFFFF
03 #FF00FF

i therefore used this sketch:

Code:

  void FillFunction() {
    String[] lines = loadStrings("colors.txt");
    int[] colorList = new int[lines.length];
    for (int i = 0; i < lines.length; i++) {
      // I assume that it's tabs separating the columns
      int tab = lines[i].indexOf(TAB);
      // Skip over the TAB character, and the # character
      String stuff = lines[i].substring(tab + 2);
      // Convert the color from hex
      int c = unhex(stuff);
      // Put it in the list, the 0xff part makes it opaque
      colorList[i] = 0xFF000000 | c;
      int_color = colorList[int_plz - 1];
    }
  }

does anyone has an idea how to solve this problem?
may use my sktech above and just change some parameters?
i'm glad for any help!!!!

taifunbrowser

Re: defining color using a txt file
Reply #1 - Jul 9^th, 2009, 12:33pm

What you described is a special case of "mapping"

01 -> #COLOR
02 -> #color2
03 -> #another color

So, you made an array, where the 1th index was COLOR, 2th index and so on.

I assume you're getting to the point where the "keys", as they're called, are not continuous, so this method doesn't make sense.

Depending on what you're optimizing for, there are a few simple ways to do what is known as a "map".

Learn about it here!

http://processing.org/learning/topics/hashmapclass.html

leanderlike

Re: defining color using a txt file
Reply #2 - Jul 9^th, 2009, 2:42pm

so do you might give me some starting help?
why does it not make sense if the keys are not continuous?
your're right, they're are not.

but i don't want to create new colors. there are 10 fixed keys and ten fixed colours.
if the key typed in is not in the list, the rect i want to fill does get no color....

so i cannot use my piece of code posted above?

taifunbrowser

Re: defining color using a txt file
Reply #3 - Jul 9^th, 2009, 7:39pm

Well, I think this could work:
Code:


private int[] colorList;
private String[] colorLines;
  int getFillColor(String typed) {
   if (colorLines==null){ //Only load first time
    String[] lines = loadStrings("colors.txt");
    colorList = new int[lines.length];
    colorLines = new String[lines.length];
    for (int i = 0; i < lines.length; i++) {
	// I assume that it's tabs separating the columns
	int tab = lines[i].indexOf(TAB);
	// Skip over the TAB character, and the # character
	String stuff = lines[i].substring(tab + 2);
	// Convert the color from hex
	int c = unhex(stuff);
	// Put it in the list, the 0xff part makes it opaque
	colorList[i] = 0xFF000000 | c;
	colorLines[i] = lines[i].substring(0,tab);
    }
   } 
   for(int k = 0; k < colorLines.length; k++){
	if (typed.equalsIgnoreCase(colorLines[k])){
	    return colorList[k]; //Note the difference.
	}
   }
   return color(0); //Default if not found
}

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