arduino_pong/src/paddle.cpp

#include "paddle.h"

void Paddle::move_pad_up() {
  if (_pos_y > 0) {
    _pos_y -= 1;
  }
}
void Paddle::move_pad_down() {
  if (_pos_y + _height < MATRIX_HEIGHT) {
    _pos_y += 1;
  }
}

void run_paddle() {
}

uint8_t Paddle::get_position() {
  return _pos_y;
}

bool Paddle::is_human() {
  return _human;
}

void Paddle::increase_score() {
  if (_score <= 9) _score += 1;
}

uint8_t Paddle::get_score() {
  return _score;
}

void Paddle::reset() {
  _score= 0;
}

bool Paddle::check_pad_movement() {
  // redefine me
  return false;
}

bool Paddle::check_pad_movement(Ball &ball) {
  // redefine me
  return false;
}
uint8_t Paddle::get_skills() {
  return 0;
}

bool HumanPaddle::check_pad_movement() {
  bool need_refresh= false;
  if (digitalRead(_pin_btn_top) == LOW) {
    this -> move_pad_up();
    need_refresh= true;
  }
  else if (digitalRead(_pin_btn_bottom) == LOW) {
    this -> move_pad_down();
    need_refresh= true;
  }
  return need_refresh;
}

bool BotPaddle::check_pad_movement(Ball &ball) {
  uint8_t ball_y= ball.get_y();
  int8_t ball_dir= ball.get_direction_x();

  // ball is moving left and pad is on right, do not move
  if (ball_dir < 0 && _pos_x > MATRIX_WIDTH / 2) return false;
  // ball is moving right and pad is on left, do not move
  else if (ball_dir > 0 && _pos_x < MATRIX_WIDTH / 2) return false;
  
  uint8_t ball_x= ball.get_x();
  int8_t ball_distance= ball_x - _pos_x;
  if (ball_distance < 0) ball_distance *= -1;
  switch (this -> get_skills()) {
    case 1:
      if (ball_distance > MATRIX_WIDTH / 2 - 2) return false;
      break;
    case 2:
      if (ball_distance > MATRIX_WIDTH / 2 - 1) return false;
      break;
    case 3:
      if (ball_distance > MATRIX_WIDTH / 2) return false;
      break;
  }

  // TODO BotPaddle movement logics
  // on higher difficult level i could also check the ball direction
  // or at lover difficulty level i could also check the distance from the pad and move only when the ball si near

  for (uint8_t py= _pos_y; py < _pos_y+PADDLE_LENGTH; py++) {
    // don't move if ball is already centered to the pad
    if (py == ball_y) continue;
    else if (_pos_y - ball_y >= 0) this -> move_pad_up();
    else this -> move_pad_down();
  }
}

uint8_t BotPaddle::get_skills() {
  return _skills;
}