int MaxPoints = 1000;
String[] lines;
PrintWriter output;
int[] x = new int[MaxPoints];
int[] y= new int[MaxPoints];
int state=-1;
int grabbed = -1;

void setup() {
  size(500, 500);
  smooth(); 
  fill(255,0);
  strokeWeight(4.0);
  //lines = loadStrings("drawbot_object.txt");
  if (lines != null) {
    state = lines.length-1;
    for (int i = 0; i < lines.length; i++) {
       String[] pieces = split(lines[i], '\t');
       x[i]=int(pieces[0]);
       y[i]=int(pieces[1]);
    }
  }
}

void mousePressed() {
  if (keyPressed  == true) {
    if (keyCode == CONTROL) {
       for (int i=0; i<=state; i++) {
         if ((x[i] >= (mouseX-10)) && (x[i] <=(mouseX+10)) &&
             (y[i] >= (mouseY-10)) && (y[i] <=(mouseY+10))) {
               grabbed=i;
             }
       }
    }

    if (keyCode == 18) {
       for (int i=0; i<=state; i++) {
         if ((x[i] >= (mouseX-10)) && (x[i] <=(mouseX+10)) &&
             (y[i] >= (mouseY-10)) && (y[i] <=(mouseY+10))) {
                for (int j=i+1; j<=state; j++) {
                   x[j-1]=x[j];
                   y[j-1]=y[j];
                }
                state--;
               }
             }
       }
    
    if (keyCode  == SHIFT) {
       output = createWriter("drawbot_object.txt");
       println("// X coordinates for object");
       print("int object_n = ");
       print(state+1);
       println(";");
       println("int object_x[] = {");
       for (int i=0; i<=state; i++) {
         print(x[i]);
         output.print(x[i]);         
         output.print('\t');
         output.println(y[i]);
         if (i<state) {
           print(", ");
         }
       }
       println("};");
       println("// Y coordinates for object");
       println("int object_y[] = {");
       for (int i=0; i<=state; i++) {
         print(y[i]);
         if (i<state) {
           print(", ");
         }
       }
        println("};");
        output.flush(); 
        output.close();
    }
  } else {
    state++;
    x[state] = mouseX;
    y[state] = mouseY;

    if (state>=MaxPoints) {
        state=0;
    }
  }
}

void mouseReleased() {
  grabbed = -1;
}

void keyPressed() {
  
}

void draw() {
  int cx1 = 0;
  int cy1 = 0;
  int cx2 = 0;
  int cy2 = 0;
  background(226);
  if (state>=0) {
   for (int i=0; i<=state; i++) {
    ellipse(x[i],y[i],10,10);
   }
   if ((state%2)>0) {
         // hack this to approximate quadratic bezier
      bezier(x[state-1], y[state-1], x[state], y[state], x[state],y[state], mouseX, mouseY);
   }
   if (grabbed >=0) {
     x[grabbed]=mouseX;
     y[grabbed]=mouseY;
   }
   for (int i=0; i<=state; i++) {
     if (((i%2)==0)&&(i>0)) {
       bezier(x[i-2], y[i-2], x[i-1], y[i-1], x[i-1],y[i-1], x[i], y[i]);
      }
   }
  }
}