Arduino_Pong

#include <U8glib.h> //Graphic library for GLCD
#include <stdlib.h> //Standard IO from C, used for itoa

U8GLIB_ST7920_128X64 u8g(13,11,10, U8G_PIN_NONE); //Setting up the screen with the u8glib

/*########################## THIS CODE IS UNDER GPL LICENSE ###############################
  #                                                                                       #
  #  I'd like to thank the creator of the U8Glib -olikraus- for his work on GLCDs         #
  #  I'd like to thank MrPantalon too for his software BitmapU8GlibCreator that came      #
  #  really useful here.                                                                  #
  #  Here's the link to the u8Glib : http://code.google.com/p/u8glib/                     #
  #  Here's the link to BitmapU8GlibCreator : http://tinyurl.com/bvfuu2a                  #
  #                                                                                       #
  #  Don't hesitate to e-mail me for serious questions : antonin.aumetre@gmail.com        #
  ###### THIS SOFTWARE WAS CREATED BY ANTONIN AUMETRE INSPIRED BY ATARI's 1972 PONG ######*/

//All this hexadecimal values are the bmp images used in the game, the were created using BitmapU8GlibCreator

//This one is the "Pong" at the beginning
const uint8_t fond_2[] U8G_PROGMEM = {
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};//128x64

//This one is the "This is" at the beginning
const uint8_t fond_1[] U8G_PROGMEM = {
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  0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
  0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0
}; //128x64

//These are the arrows, one empty and the other filled
const uint8_t haut_blanc[] U8G_PROGMEM = {
  0x18,0x0,0x24,0x0,0x42,0x0,0x81,0x0,0x81,0x0,0x66,0x0,0x24,0x0,0x24,0x0,
  0x24,0x0,0x24,0x0,0x18,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0
};
const uint8_t haut_noir[] U8G_PROGMEM = {
  0x30,0x78,0xfc,0x30,0x30,0x30,0x30,0x30};

//This is the ball
const uint8_t balle[] U8G_PROGMEM = {
  0x38,0x4c,0x8a,0x92,0x92,0x64,0x38,0x0
};//7x7

//Declaration of functions
void right_bounce(void);
void left_bounce(void);
void initialisation(void);
void racket_movements(void);
void game(void);
void intro(void);

//Declaration of variables
int L=2, R=52, a=0, b=0, Posx=64, Posy=32, x1=0, y1=0, scoreL=0, scoreR=0, ball_speed = 2;
const unsigned short Right=A1, Left=A0, racket_speed=2;
boolean start=false, x=false, y=false, angle_bounce=true, l=false, r=false;

void setup(void) {
  u8g.setColorIndex(1); //Setting the index as 1 ==> the functions will draw "black" pixels
  pinMode(Right, INPUT); //Setting the A1 pin as input
  pinMode(Left, INPUT); //Setting the A0 pin as input

  while(r==false || l==false){ //Here we wait for the players to push their joystick up
    a=analogRead(Right); //Reading the analog values of each joystick
    b=analogRead(Left);
    if(a>800){ //I took 800 because I think it's a good value, the stick has to be pressed but not at 100%
      r=true;
    }
    if(b>800){
      l=true; //If the stick is pushed till the analog value is 800, we consider the left one as pressed
    }
    u8g.firstPage(); //That's the function as described on the website of the u8glib
    do {
      intro(); //This function draws the first screen
    }
    while(u8g.nextPage());
  }
  delay(2000); //After the two players pushed their joystick, we wait 2 seconds to start the game
}

void loop(void){
  if (start==false){ //Start is false by default and it will be set false whenever a point is marked
    initialisation(); //When a point is marked, we have to initialise the game
  }
  racket_movements(); //This function determines the position of the two rackets depending on the joysticks movements

  //Here are described the movements of the ball depending on Posx and Posy
  if(x==true){
    Posx+=ball_speed; //The ball will move to the right
  }
  if(x==false){
    Posx-=ball_speed; //The ball will move to the left
  }
  if(y==true && angle_bounce==true){ //angle_bounce is when the ball bounces on the racket with an angle, not directly
    Posy+=ball_speed; //The ball will move down
  }
  if(y==false && angle_bounce==true){
    Posy-=ball_speed; //The ball will move up
  }
  if(angle_bounce==false){ //If there's no angle, it's a direct shot
    ball_speed=5; //As it's a direct shot, the speed is increased
  }
  else{
    ball_speed=2; //If no direct shot, the ball moves slower
  }

  //Horizontal limitations & bounce
  if(Posy<=3){ //If the ball hits the upper wall
    y=true; //As described before, the ball will bounce down
  }
  if(Posy>=60){ //If the ball hits the lower wall
    y=false; //As described before, the ball will bounce up
  }

  //Bounces on the rackets
  //Bounce on the left racket
  if (Posx<64){ //This tells arduino to look for bounces only if the ball is in the half of the screen where it can happend
    left_bounce();
  }
  //Bounce on the right racket
  if (Posx>64){ //This tells arduino to look for bounces only if the ball is in the half of the screen where it can happend
    right_bounce();
  }

  //Scoring
  if(Posx<=0){ //If the ball went behind the left racket
    scoreL++; //Increments the left score
    start=false; //Initalize the game
  }
  if(Posx>=127){ //If the ball went behind the right racket
    scoreR++; //Increments the right score
    start=false; //Initalize the game
  }


  u8g.firstPage(); //This is the u8glib function to draw the screen
  do {
    game(); //This corresponds to the game screen
  }
  while(u8g.nextPage());
}

void intro(void){
  u8g.drawBitmapP(0,0,16, 64, fond_1); //Draws the beginning screen
  u8g.drawBitmapP(0,0,16, 64, fond_2);
  u8g.drawBitmapP(64,7,2, 16, haut_blanc); //Draws the empty arrows
  u8g.drawBitmapP(104,7,2, 16, haut_blanc);
  if(r==true){ //If the corresponding Joystick has been pushed, fill the arrow
    u8g.drawBitmapP(105,9,1, 8, haut_noir);
  }
  if(l==true){
    u8g.drawBitmapP(65,9,1, 8, haut_noir);
  }
}

void game(void) {
  u8g.drawBitmapP(Posx-3,Posy-3,1,8,balle); //Draw the ball
  u8g.drawFrame(0,0,128,64); //Draws a frame
  for (int i=0;i<64;i=i+8){ //Draws a doted line at the middle
    u8g.drawLine(64,i,64,i+4);
  }
  u8g.drawLine(124,R,124,R+9); //Draws the right racket
  u8g.drawLine(3,L,3,L+9); //Draws the left racket

  u8g.setFont(u8g_font_5x7); //Set a default font
  /*The itoa function converts an int to a char. I used it here because the
  function draw.Str only takes a char*/
  char buffer1[33];
  itoa(scoreR, buffer1, 10);
  char buffer2[33];
  itoa(scoreL, buffer2, 10);

  u8g.drawStr(54,8,buffer1); //Draws the score of each player
  u8g.drawStr(66,8,buffer2);
}

//FUNCTIONS

void initialisation(void){
  Posx=64; //Setting the ball at the middle of the screen
  Posy=32;
  randomSeed(analogRead(A7)); //We use A7 to create a random seed wich is random by the noise on analogic pins
  x1=random(0,100); //We take two random numbers from 0 to 100
  y1=random(0,100);

  // All we do here is randomly give the ball a direction, given by a couple of numbers. For instance (Right, Up) or (Left, Up)
  if(x1<50){
    x=false;
  }
  if(x1>50){
    x=true;
  }
  if(y1<50){
    y=false;
  }
  if(y1>50){
    y=true;
  }
  start=!start; // Start was false, we set it to true
}

void racket_movements(void){
  a=analogRead(Right); //We take some input from each joystick
  b=analogRead(Left);
  //Controlling the racket on the right
  if (a > 800 && R>2){
    R-=racket_speed;
  }
  if (a < 200 && R<52){
    R+=racket_speed;
  }
  //Controlling the racket on the left
  if (b > 800 && L>2){
    L-=racket_speed;
  }
  if (b < 200 && L<52){
    L+=racket_speed;
  }
}

/* For the following functions, the if statements are built this way :
if ( limits_of_the_part_of_the_racket_considered_on_the_X_axis  AND limits_of_the_part_of_the_racket_considered_on_the_Y_axis )
This means we have a rectangle defined around the part of the racket we want to control on wich the ball will bounce.
I described how it orks for the left racket, it's the same for the right one, only directions on wich the ball
will go change.
*/
void left_bounce(void){
  if(Posx>2 && Posx<9 && Posy>=L-2 && Posy<L+3){ //Upper part of the racket
    if(angle_bounce==false){ //If direct hit
      y=false; //The ball goes up
    }
    x=true; //The ball moves to the right
    angle_bounce=true; //If bounce on upper or lower side, stops direct shots
  }
  if(Posx>2 && Posx<9 && Posy>L+6 && Posy<=L+11){ //Lower part of the racket
    if(angle_bounce==false){ //If direct hit
      y=true;  //The ball goes down
    }
    x=true; //The ball moves to the right
    angle_bounce=true; //If bounce on upper or lower side, stops direct shots
  }
  if(Posx>2 && Posx<9 && Posy>=L+3 && Posy<=L+6){ //Middle part of the racket
    x=true; //The ball moves to the right
    angle_bounce=false; //Do a direct shot
  }
}

void right_bounce(void){
  if(Posx>117 && Posx<125 && Posy>=R-2 && Posy<R+3){ //Upper part of the racket
    if(angle_bounce==false){
      y=false;
    }
    x=false;
    angle_bounce=true;
  }
  if(Posx>117 && Posx<125 && Posy>R+6 && Posy<=R+11){ //Lower part of the racket
    if(angle_bounce==false){
      y=true;
    }
    x=false;
    angle_bounce=true;
  }
  if(Posx>117 && Posx<125 && Posy>=R+3 && Posy<=R+6){ //Middle part of the racket
    x=false;
    angle_bounce=false;
  }
}