start implementi difficulty level, but needs some balancements

arduino_pong.ino

@@ -35,9 +35,10 @@ enum game_statuses : uint8_t {
 game_statuses game_status= TIMER;
 
 Ball ball(4, 6);
-HumanPaddle p1(1, P1_BTN_UP, P1_BTN_BOTTOM);
+// HumanPaddle p1(1, P1_BTN_UP, P1_BTN_BOTTOM);
 // HumanPaddle p2(4, P2_BTN_UP, P2_BTN_BOTTOM);
-BotPaddle p2(4, 1);
+BotPaddle p1(1, 0, 1);
+BotPaddle p2(4, MATRIX_WIDTH-1, 1);
 Engine engine(p1, p2, ball, INITIAL_BALL_DELAY);
 Renderer renderer(p1, p2, ball, frame, matrix);
 

src/paddle.cpp

@@ -1,13 +1,13 @@
 #include "paddle.h"
 
 void Paddle::move_pad_up() {
-  if (_position > 0) {
-    _position -= 1;
+  if (_pos_y > 0) {
+    _pos_y -= 1;
   }
 }
 void Paddle::move_pad_down() {
-  if (_position + _height < MATRIX_HEIGHT) {
-    _position += 1;
+  if (_pos_y + _height < MATRIX_HEIGHT) {
+    _pos_y += 1;
   }
 }
 
@@ -15,7 +15,7 @@ void run_paddle() {
 }
 
 uint8_t Paddle::get_position() {
-  return _position;
+  return _pos_y;
 }
 
 bool Paddle::is_human() {
@@ -43,6 +43,9 @@ 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;
@@ -58,14 +61,41 @@ bool HumanPaddle::check_pad_movement() {
 }
 
 bool BotPaddle::check_pad_movement(Ball &ball) {
-  uint8_t y= ball.get_y();
+  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= _position; _py < _position+PADDLE_LENGTH; _py++) {
+
+  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 == y) continue;
-    else if (_position - y >= 0) this -> move_pad_up();
+    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;
+}

src/paddle.h

@@ -2,6 +2,7 @@
 #define PADDLE_H
 
 #include <Arduino.h>
+#include <cstdint>
 #include "config.h"
 #include "ball.h"
 
@@ -9,13 +10,13 @@ class Paddle {
 
   protected:
     // define player coordinates
-    uint8_t _position;
+    uint8_t _pos_y;
     uint8_t _height= PADDLE_LENGTH;
     uint8_t _score= 0;
     bool _human;
 
   public:
-    Paddle (uint8_t position, bool human) : _position(position), _human(human) {}
+    Paddle (uint8_t pos_y, bool human) : _pos_y(pos_y), _human(human) {}
     void move_pad_up();
     void move_pad_down();
     uint8_t get_position();
@@ -25,6 +26,7 @@ class Paddle {
     void reset();
     virtual bool check_pad_movement();
     virtual bool check_pad_movement(Ball &ball);
+    virtual uint8_t get_skills();
 };
 
 class HumanPaddle : public Paddle {
@@ -38,16 +40,19 @@ class HumanPaddle : public Paddle {
 };
 
 class BotPaddle : public Paddle {
+
   private:
-    uint8_t _level; // this is the difficulty level
+    uint8_t _pos_x;
+    uint8_t _skills; // this is the difficulty level
 
   public:
-    BotPaddle(uint8_t position, uint8_t level) 
-              : Paddle(position, false), _level(level) {
-                if (_level < 1) _level= 1;
-                if (_level > 3) _level= 3;
+    BotPaddle(uint8_t position, uint8_t pos_x, uint8_t skills) 
+              : Paddle(position, false), _pos_x(pos_x), _skills(skills) {
+                if (_skills < 1) _skills= 1;
+                if (_skills > 3) _skills= 3;
               }
     bool check_pad_movement(Ball &ball);
+    uint8_t get_skills();
 };
 
 #endif