move all libs into src

src/config.h

@@ -0,0 +1,11 @@
+#define P1_BTN_UP 13
+#define P1_BTN_BOTTOM 12
+#define P2_BTN_UP 11
+#define P2_BTN_BOTTOM 10
+
+#define MATRIX_WIDTH 12
+#define MATRIX_HEIGHT 8
+#define BALL_RESET_X (MATRIX_WIDTH / 2)
+#define BALL_RESET_Y (MATRIX_HEIGHT / 2)
+#define BAR_LENGTH 3
+#define INITIAL_BALL_DELAY 200

src/pong_ball.cpp

@@ -0,0 +1,88 @@
+#include <Arduino.h>
+#include "config.h"
+#include "pong_player.h"
+
+// used to increase speed when game is too easy
+int hits= 0;
+
+int p1_score= 0;
+int p2_score= 0;
+
+// initially ball has no movements
+// once game/round starts, balls gets random x and y movements
+int ball_move_x= 0;
+int ball_move_y= 0;
+
+void point_scored(int &ball_x, int &ball_y, int &ball_delay) {
+  ball_x= BALL_RESET_X;
+  ball_y= BALL_RESET_Y;
+  Serial.print("P1: ");
+  Serial.print(p1_score);
+  Serial.print(" - ");
+  Serial.print("P2: ");
+  Serial.print(p2_score);
+  Serial.println();
+
+  hits= 0;
+  ball_delay= INITIAL_BALL_DELAY;
+}
+
+void move_ball(int &ball_x, int &ball_y, int &ball_delay, int p1_start, int p2_start, int &need_refresh) {
+  need_refresh= 1;
+  if (ball_x < 0 || ball_x > MATRIX_WIDTH-1 || ball_y < 0 || ball_y > MATRIX_HEIGHT-1) {
+    // ball out of matrix limits
+    ball_x= BALL_RESET_X;
+    ball_y= BALL_RESET_Y;
+    return;
+  }
+  
+  // if ball is not moving, get random direction
+  // this is the initial position
+  if (ball_move_x == 0 || ball_move_y == 0) {
+    // extract random number between 0 or 1 to select the directions
+    if (random(2) == 0) ball_move_x= 1;
+    else ball_move_x= -1;
+    if (random(2) == 0) ball_move_y= 1;
+    else ball_move_y= -1;
+  }
+
+  else if (ball_x == 0) {
+    // if p1 collision: reverse x, go left
+    if (!ball_player_collision(p1_start, ball_y)) {
+      // else p2 score, reset board
+      p2_score += 1;
+      Serial.println("Player 2 Scores");
+      point_scored(ball_x, ball_y, ball_delay);
+    }
+    else {
+      hits += 1;
+      ball_move_x= ball_move_x * -1;
+    }
+  }
+  else if (ball_x == MATRIX_WIDTH-1) {
+    if (!ball_player_collision(p2_start, ball_y)) {
+      // else p1 score, reset board
+      p1_score += 1;
+      Serial.println("Player 1 Scores");
+      point_scored(ball_x, ball_y, ball_delay);
+    }
+    else {
+      hits += 1;
+      ball_move_x= ball_move_x * -1;
+    }
+  }
+
+  if (ball_y == 0 || ball_y == MATRIX_HEIGHT-1) {
+    // reverse y, go down
+    ball_move_y= ball_move_y * -1;
+  }
+
+  if (hits >= 6 && ball_delay >= 80) {
+    // increase ball speed
+    hits = 0;
+    ball_delay -= 20;
+  }
+
+  ball_x+= ball_move_x;
+  ball_y+= ball_move_y;
+}

src/pong_ball.h

@@ -0,0 +1,7 @@
+#ifndef PONG_BALL_H
+#define PONG_BALL_H
+
+void point_scored();
+void move_ball(int &ball_x, int &ball_y, int &loop_delay, int p1_start, int p2_start, int &need_refresh);
+
+#endif

src/pong_player.cpp

@@ -0,0 +1,33 @@
+#include <Arduino.h>
+#include "config.h"
+
+int ball_player_collision(int player, int ball_y) {
+  for (int p= player; p < player + BAR_LENGTH; p++) {
+    if (ball_y == p) {
+      return 1;
+    }
+  }
+  return 0;
+}
+
+int pong_move_p1(int &p1_start, int &need_refresh) {
+  if (digitalRead(P1_BTN_UP) == LOW && p1_start > 0) {
+    p1_start -= 1;
+    need_refresh= 1;
+  }
+  else if (digitalRead(P1_BTN_BOTTOM) == LOW && p1_start < 5) {
+    p1_start += 1;
+    need_refresh= 1;
+  }
+}
+
+int pong_move_p2(int &p2_start, int &need_refresh) {
+  if (digitalRead(P2_BTN_UP) == LOW && p2_start > 0) {
+    p2_start -= 1;
+    need_refresh= 1;
+  }
+  else if (digitalRead(P2_BTN_BOTTOM) == LOW && p2_start < 5) {
+    p2_start += 1;
+    need_refresh= 1;
+  }
+}

src/pong_player.h

@@ -0,0 +1,8 @@
+#ifndef PONG_PLAYER_H
+#define PONG_PLAYER_H
+
+int ball_player_collision(int player, int ball_y);
+int pong_move_p1(int &p1_start, int &need_refresh);
+int pong_move_p2(int &p2_start, int &need_refresh);
+
+#endif

src/pong_render.cpp

@@ -0,0 +1,22 @@
+#include <Arduino.h>
+#include "config.h"
+
+void render_matrix(byte frame[MATRIX_HEIGHT][MATRIX_WIDTH], int p1_start, int p2_start, int ball_x, int ball_y) {
+  // clear
+  for (int x=0; x < MATRIX_WIDTH; x++) {
+    for (int y=0; y < MATRIX_HEIGHT; y++) {
+      frame[y][x]= 0;
+    }
+  }
+  
+  // players coords
+  for (int i= p1_start; i < p1_start+BAR_LENGTH; i++) {
+    frame[i][0]= 1;
+  }
+  for (int i= p2_start; i < p2_start+BAR_LENGTH; i++) {
+    frame[i][MATRIX_WIDTH-1]= 1;
+  }
+  
+  // ball coords
+  frame[ball_y][ball_x]= 1;
+}

src/pong_render.h

@@ -0,0 +1,9 @@
+#ifndef PONG_RENDER_H
+#define PONG_RENDER_H
+
+#include <Arduino.h>
+#include "Arduino_LED_Matrix.h"
+
+void render_matrix(byte frame[MATRIX_HEIGHT][MATRIX_WIDTH], int p1_start, int p2_start, int ball_x, int ball_y);
+
+#endif