import processing.opengl.*;

PiPoint[] pipoints;

int refresh = 15;
int curline = 0;
int curchar = 0;
float offset = 0;
String thePi[];

void setup(){
  smooth();
  noStroke();
  thePi = loadStrings("1000000.txt");
  println("there are " + thePi.length + " lines");
  background(200);
  size(500,500, OPENGL);
  camera(0,-70,55,100,0,0,0,1,0);
  PFont font;
  // The font must be located in the sketch's 
  // "data" directory to load successfully
  font = loadFont("CenturyGothic-16.vlw"); 
  textFont(font); 
  fill(0, 102, 153);
  
  pipoints = new PiPoint[80];
  for (int i=0; i<pipoints.length; i++){
   pipoints[i] = new PiPoint(i); 
  }
}

void draw(){
  background(200);
  offset+=0.07;
  //offset = mouseX;
  pipoints[0].update(offset);
  for (int i=1; i<pipoints.length; i++){
   pipoints[i].update(offset);
   beginShape();
   vertex(pipoints[i-1].x, pipoints[i-1].y, -100);
   vertex(pipoints[i-1].x, pipoints[i-1].y, 5);
   vertex(pipoints[i].x, pipoints[i].y, 5);
   vertex(pipoints[i].x, pipoints[i].y, -100);
   endShape();
  }
  textMode(SCREEN);
  text("The value of pi at decimal place "+round(offset)+" is "+getpi(round(offset))+".", 70, 465);
  int rem=1000000-floor(offset);
  int days = floor((rem)/345600);
  int hours = floor(((rem)%345600)/14400);
  int minutes = floor((((rem)%345600)%14400)/240);
  int seconds = floor(((((rem)%345600)%14400)%240)/4);
  text("It will take you "+days+":"+hours+":"+minutes+":"+seconds+" to see the 1,000,000th decimal.", 70, 490);
  textMode(MODEL);
}

int getpi(int aplace){
  if(aplace <= 0){
   return 3; 
  } else {
   char num = thePi[floor((aplace-1)/50)+1].charAt((aplace-1)%50);
   switch(num){
     case '1':
       return 1;
     case '2':
       return 2;
     case '3':
       return 3;
     case '4':
       return 4;
     case '5':
       return 5;
     case '6':
       return 6;
     case '7':
       return 7;
     case '8':
       return 8;
     case '9':
       return 9;
     case '0':
       return 0;
     default:
       return 0;
   }
  }
}