class LineToGo {
  PVector[] theLine;

  LineToGo() { //like a setup for the class  Constructor

    theLine =new PVector[] {  
      new PVector(0, 0, 0)
    };
  } // Constructor



  void addToArray(float x, float y, float z) {
    theLine =(PVector[]) append(theLine, new PVector(x, y, z)); // add new digit onto array
    drawArray();
  } //void addToArray

    void update() { // checks if atpoint is true, if so, it will send the next point
    if (atPoint == true) {
      SendPoint();
    }
  }

  void SendPoint() {  //sends a point, and removes it from array
    if (theLine.length > 1) {  // wait until array is atleast 6 points long, 6 coord buffer
      if (theLine[1].z == 1) { //if pen down/ z = 1
        stroke(0); // black line for trailing/ points already been to
        //line(theLine[0].x, theLine[0].y, theLine[1].x, theLine[1].y);
        line(theLine[0].x*onScreenScale, theLine[0].y*onScreenScale, theLine[1].x*onScreenScale, theLine[1].y*onScreenScale);
        
      } // if pend down / z = 2

      Machine.sendVal(theLine[0].x, theLine[0].y, theLine[0].z);  //send the value before it gets destroyed

      atPoint = false; // reset flag if point sent 
      theLine =(PVector[]) subset(theLine, 1); // take out a point when it has reached it
      drawArray();
    } // 6 point buffer
  } //void sendPoint()


  void drawArray() {

    if (autoStop) {
      if (theLine.length> 200) {
        On = false;
      }
      else if (theLine.length<50) {
        On = true;
      }
    }//autostop
    if (printArray) {
      println("the line is : " + theLine.length + " long");
    }

    for ( int i=1; i<=theLine.length-1; i++) { //cycle through all points in the array if it changes



      if (printArray) {
        if (i == 1) {
          println("+++++++++++++++++++ array ++++++++++++");
        }

        println("Point number " + i + " = " + theLine[i]);
      }//print array or not
      if (theLine[i].z == 1) { // if pen down
        stroke(255, 100, 100); //red line for array
        //line(theLine[i-1].x, theLine[i-1].y, theLine[i].x, theLine[i].y); // re draw the array when it changes
        line(theLine[i-1].x*onScreenScale, theLine[i-1].y*onScreenScale, theLine[i].x*onScreenScale, theLine[i].y*onScreenScale); // re draw the array when it changes
      } // pen down / z = 1
      else { //pen up / z =0
        if (printArray) {
          println("lifted");
        }//print array or not
      } // pen up / z = 0

      if (i == theLine.length-1) {//at the last point in the array  
        if (printArray) {
          println("+++++++++++++++++++ array ++++++++++++");
        }//print array or not
      }// last point in array
    }// cycle through all points
  } // void drawArray()
}