xp5a4.pde

import processing.pdf.*;
import java.util.Calendar;

boolean savePDF = false;

void setup() {
  //settings();
}

void settings() {
  int dpi=72; 
  float width_mm=210;
  float height_mm=297;
  int width_px=int(width_mm*0.03937*dpi);
  int height_px=int(height_mm*0.03937*dpi);
  size(width_px, height_px);
}

void draw() {
  if (savePDF) beginRecord(PDF, timestamp()+".pdf");
  colorMode(HSB, width, height, 100);
  
  // write some code...
  

  if (savePDF) {
    savePDF = false;
    endRecord();
  }
}

void keyPressed() {
  if (key=='s' || key=='S') saveFrame(timestamp()+"_##.png");
  if (key=='p' || key=='P') savePDF = true;
}

String timestamp() {
  Calendar now = Calendar.getInstance();
  return String.format("%1$ty%1$tm%1$td_%1$tH%1$tM%1$tS", now);
}