arduino_pong/arduino_pong.ino

#include "Arduino_LED_Matrix.h"

#include "src/config.h"
#include "src/pong_render.h"
#include "src/pong_player.h"
#include "src/pong_ball.h"

// create LED matrix object
ArduinoLEDMatrix matrix;

// initial pong frame matrix
byte frame[MATRIX_HEIGHT][MATRIX_WIDTH] = {
  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
  { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
  { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
  { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1 },
  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
};

// players coordinates
int players_coords[2]= {1, 4};
int players_scores[2]= {0, 0};

// initials balls coordinates
int ball_x= BALL_RESET_X;
int ball_y= BALL_RESET_Y;

int need_refresh= 1;

int ball_delay= INITIAL_BALL_DELAY;

bool game_over= false;
bool go= true;

long exec_t2= millis();


void setup() {
  Serial.begin(9600);
  // start LED matrix
  matrix.begin();

  pinMode(P1_BTN_UP, INPUT_PULLUP);
  pinMode(P1_BTN_BOTTOM, INPUT_PULLUP);
  pinMode(P2_BTN_UP, INPUT_PULLUP);
  pinMode(P2_BTN_BOTTOM, INPUT_PULLUP);

  randomSeed(millis());
}

void loop() {
  for (int i = START_TIMER; i >= 0; i--) {
    render_timer(frame, i);
    delay(1000);
    matrix.renderBitmap(frame, MATRIX_HEIGHT, MATRIX_WIDTH);
  }

  game_over= false;
  go= true;

  // delay the first ball movement
  exec_t2= millis() + FIRST_START_BALL_DELAY;
  
  while (go) {
    long exec_t1= millis();
    pong_move_p1(players_coords[0], need_refresh);
    pong_move_p2(players_coords[1], need_refresh);
    if (exec_t1 - exec_t2 > ball_delay) {
      bool scored= move_ball(ball_x, ball_y, ball_delay, players_coords, players_scores, need_refresh);
      if (scored) {
        render_score(frame, players_scores);
        matrix.renderBitmap(frame, MATRIX_HEIGHT, MATRIX_WIDTH);
        delay(1000);
        if (players_scores[0] >= MAX_POINTS || players_scores[1] >= MAX_POINTS) {
          render_winner(frame, matrix, players_scores);
          need_refresh= 0;
          game_over= true;
        }
        // delay the ball movement after score
        exec_t2= millis() + FIRST_START_BALL_DELAY;
      } else exec_t2= exec_t1;
    }
    
    // rerender matrix only if something is changed
    if (need_refresh) {
      render_matrix(frame, players_coords, ball_x, ball_y);
      matrix.renderBitmap(frame, MATRIX_HEIGHT, MATRIX_WIDTH);
      need_refresh= 0;
    }
    if (!game_over) delay(50);
    
    // keep showing the winner waiting for a restart
    while (game_over) {
      // restart game once one button is pressed
      if (digitalRead(P1_BTN_UP) == LOW || digitalRead(P1_BTN_BOTTOM) == LOW || digitalRead(P2_BTN_UP) == LOW || digitalRead(P2_BTN_BOTTOM) == LOW) {
        go= false;
        game_over= false;
        players_scores[0]= 0;
        players_scores[1]= 0;
      }
      delay(100);
    }
  }
}