/**
 * Letters. 
 * 
 * Draws letters to the screen. This requires loading a font, 
 * setting the font, and then drawing the letters.
 */

PFont fontA;

int offset=0;
int i=0;
int j=0;
int NUMCHARS=4;
int INCREMENT=3;

int letter_width=250;

String lines[] = { "" };

void setup() 
{
  size(800, 600);
  background(255);
  smooth();
  // Load the font. Fonts must be placed within the data 
  // directory of your sketch. A font must first be created
  // using the 'Create Font...' option in the Tools menu.
  // Uncomment the following two lines to see the available fonts 
  //String[] fontList = PFont.list();
  //println(fontList);

  textAlign(LEFT);
  fontA = createFont("Helvetica-Bold", 255);
  fill(0);
  textFont(fontA, 600);
  
  loadText("/Users/rtwomey/script/script.txt");
  //textMode(SCREEN);
  i=0;
  offset=0;
 } 

void draw()
{
  
  background(255);
  fill(0);

  text(lines[j].substring(i, i+NUMCHARS), offset, 500);

  offset-=INCREMENT;
  if(offset<-1*int(textWidth(lines[j].charAt(i)))) {
    offset=0;
    i+=1;
  };
  
  if(i>lines[j].length()-NUMCHARS) {
    findNextLine();
    i=0;
  };
}

void loadText(String filename)
{
     //String lines[] = loadStrings("two stroke engine2.txt");
     //String lines[] = loadStrings("script.txt");
     //String lines[] = loadStrings("SCIP.txt");
     lines = loadStrings(filename);
     if(lines != null){
       println("there are " + lines.length + " lines:");
     } else {
       println("error, no text in file "+filename+". exiting.");
       exit();
     }; 
     
    // zero our line counter
    j=0;
    
    // look for first line of 4 or more characters
    findNextLine();
   
}

void findNextLine() {
   // find the next line with 4 or more characters
   j++; 
   while (lines[j].length() < 4) {
    if(j>=lines.length) {
      println("error, no lines in file with 4 or more characters. exiting.");
      exit();
    };
    j++;
   };
   println(j+" of "+lines.length);
};