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import processing.serial.*;  
import java.awt.event.KeyEvent;  
import java.io.IOException;

Serial myPort;  
String angle="";
String distance="";
String data="";
String noObject;
float pixsDistance;
int iAngle, iDistance;
int index1=0;
int index2=0;

void setup() {
 size (1000, 500);  
 smooth();
 myPort = new Serial(this,"COM4", 9600);  
 myPort.bufferUntil('.');  
}

void draw() {
  fill(98,245,31);
  noStroke();
  fill(0,4); 
  rect(0, 0, width, 1010); 
  fill(98,245,31); // green 
  drawRadar(); 
  drawLine();
  drawObject();
  drawText();
}

void serialEvent (Serial myPort) { 
  data = myPort.readStringUntil('.');
  data = data.substring(0,data.length()-1);
  index1 = data.indexOf(","); 
  angle= data.substring(0, index1); 
  distance= data.substring(index1+1, data.length()); 
  iAngle = int(angle);
  iDistance = int(distance);
}

void drawRadar() {
  pushMatrix();
  translate(500,480); 
  noFill();
  strokeWeight(2);
  stroke(98,245,31);
  arc(0,0,1000,1000,PI,TWO_PI);
    arc(0,0,800,800,PI,TWO_PI);
  arc(0,0,600,600,PI,TWO_PI);
  arc(0,0,400,400,PI,TWO_PI);
  arc(0,0,200,200,PI,TWO_PI);
  line(-500,0,500,0);
  line(0,0,-500*cos(radians(30)),-500*sin(radians(30)));
  line(0,0,-500*cos(radians(60)),-500*sin(radians(60)));
  line(0,0,-500*cos(radians(90)),-500*sin(radians(90)));
  line(0,0,-500*cos(radians(120)),-500*sin(radians(120)));
  line(0,0,-500*cos(radians(150)),-500*sin(radians(150)));
  line(-500*cos(radians(30)),0,500,0);
  popMatrix();
}

void drawObject() {
  pushMatrix();
  translate(500,480); 
  strokeWeight(9);
  stroke(255,10,10); // red 
  pixsDistance = iDistance*22.5; 
  if(iDistance<30){
  line(pixsDistance*cos(radians(iAngle)),-pixsDistance*sin(radians(iAngle)),500*cos(radians(iAngle)),-500*sin(radians(iAngle)));
  }
  popMatrix();
}

void drawLine() {
  pushMatrix();
  strokeWeight(9);
  stroke(30,250,60);
  translate(500,480); 
  line(0,0,500*cos(radians(iAngle)),-500*sin(radians(iAngle))); 
  popMatrix();
}

void drawText() { 
  pushMatrix();
  textSize(14);
  fill(98,245,60);
  translate(500,490);
  text("90°",0,5);
  text("www.iHackLab.blogspot.com        0°",250,5);
  text("180°",-500,5);
  popMatrix(); 
}


Reprogrammed by: J.B. Wylzan
Website:http://myarduinoscratchbook.blogspot.com