import processing.pdf.*;

int unit = 80;
int steps = 5;

size(100*steps,12*unit);

PFont font = loadFont("ArialMT-48.vlw");

PGraphicsPDF pdf;
pdf= (PGraphicsPDF)beginRecord(PDF, "binomial-tree.pdf");
beginRecord(pdf);

//quad(0, height/2, unit, height/2 - unit, unit*2, height/2, unit, height/2 + unit);

String spotPriceStr = "S";//these will never render
String optionPriceStr = "f";//these will never render

strokeWeight(2.0);

//Thin lines
for(int outer = steps; outer>0; outer--){
  pushMatrix();
  for(int inner = 0; inner<outer; inner++){
    line(0+(steps-outer)*unit, height/2 +(steps-outer)*unit, unit +(steps-outer)*unit, height/2 - unit +(steps-outer)*unit); 
    translate(unit,-unit);
 }
  popMatrix();
  
  pushMatrix();
  for(int inner = 0; inner<outer; inner++){
    line(0+(steps-outer)*unit, height/2 +(steps-outer)*unit, unit +(steps-outer)*unit, height/2 + unit +(steps-outer)*unit); 
    translate(unit,-unit);
  }
  popMatrix();
}

//Thick points
for(int outer = steps; outer>=0; outer--){
  pushMatrix();
  for(int inner = 0; inner<=outer; inner++){
    pushStyle();
    stroke(#ff0000);
    strokeWeight(10.0);
    point(0+(steps-outer)*unit, height/2 + (steps-outer)*unit);
    strokeWeight(3.0);
    textFont(font, 32);
    fill(#000000);
    //textLeading(10);
    text(optionPriceStr, 0+(steps-outer)*unit, height/2 + (steps-outer)*unit); 
    translate(unit, -unit);
    popStyle();
  }
  popMatrix();
}

endRecord();