//PONG CONTROLLED WITH POTS
/*
 Utilizing:
 "Serial call-and-response for v.90 by Tom Igoe
 Sends a byte out the serial port, and reads 3 bytes in."
 This is a simple pong game. PIC should use at:
 A0, A1 POT, A3 Switch
 */

import processing.serial.*;

Serial port;                         // the serial port
int[] serialInArray = new int[3];    // where we'll put what we receive
int serialCount = 0;                 // a count of how many bytes we receive
float input1, input2, input3;        // Input variables
//here input3 not utilized
boolean firstContact = false;        // whether we've heard from the microcontroller

float left, right, x, y, vx, vy, iv;
int kill;


void setup() {
  size(200, 200); stroke(255); smooth();
  background(0);
  
  left=right=100;
  x=y=height/2;
  iv=1.5;
  vx=iv; vy=0;
  kill=0;

  // Set initial input values
  input1 = height/2;
  input2 = height/2;

  // print a list of the serial ports, for debugging purposes:
  println(Serial.list());
  //On Windows machines, this generally opens COM1.
  port = new Serial(this, Serial.list()[0], 9600);
  port.write(65);    // send a capital A to start the microcontroller sending
}

void draw() {
  
  delaychoice();
  
  background(0);
  line(0,0,200,0);
  line(0,199,200,199);

  left=input1*(200.0/255.0);
  right=input2*(200.0/255.0);

  drawpanel(left, 5);
  println(left);
  println("e");
  drawpanel(right,195);

  decidethendraw();

  callserial();

}

//below are the pong functions

void drawpanel(float h, float s)
{
  line(s, h+10, s, h-10);
}

void delaychoice()
{
if(kill==1)
  {
    delay(2000); 
    kill=0;
  }
  else
  {
    delay(30);
  } 
}

void decidethendraw()
{
 if(x==10 && (left+10>y && left-10<y))
  {
    vx=-1*vx;
    vy=(y-left)/10;
  }
  if(x==190&& (right+10>y && right-10<y))
  {
    vx=-1*vx;
    vy=(y-right)/10;
  }

  if(y<1+5 || y>199-5)
  {
    vy=-1*vy;
  }

  x=x+vx;
  y=y+vy;

  ellipse(x,y,10,10);

  if(x<-1)
  { 
    fill(255,0,0);
    stroke(255,0,0);
    rect(50,100,30,30);
    x=y=100;
    vx=iv;
    vy=0;
    left=right=100;
    fill(255);
    stroke(255);
    kill=1;
  }
  if(x>201)
  { 
    fill(255,0,0);
    stroke(255,0,0);
    rect(150,100,30,30);
    x=y=100;
    vx=iv;
    vy=0;
    left=right=100;
    fill(255);
    stroke(255);
    kill=1;
  }

}

//Below are the serial functions

void callserial(){
while (port.available() > 0) {
    serialEvent();
    // note that we heard from the microntroller:
    firstContact = true; }
  // if there's no serial data, send again until we get some.
  // (in case you tend to start Processing before you start your external device):
  if (firstContact == false) {
    delay(300);
    port.write(65);}
}

void serialEvent() {
  processByte((char)port.read());
}

void processByte(char inByte) {
  // add the latest byte from the serial port to array:
  serialInArray[serialCount] = inByte;
  serialCount++;
  // if we have 3 bytes:
  if (serialCount > 2 ) {
    input1 = (float)serialInArray[0];
    input2 = (float)serialInArray[1];
    input3 = (int)serialInArray[2];
    // send a capital A to request new sensor readings:
    port.write(65);
    // reset serialCount:
    serialCount = 0;
  }
}