Hi!
I'm following a tutorial on how to make a pong game as a project, everything was going fine until I ran the code provided. The display just shows the Adafruit logo when it is supposed to display the actual pong game. I don't know much about coding so I'm not sure what went wrong. If anyone can let me know what might be wrong or what I can do to fix it, that would be a great help!
Here's the code:
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
Adafruit_SSD1306 display(4);
int resolution[2] = {128, 64}, ball[2] = {20, (resolution[1] / 2)};
const int PIXEL_SIZE = 8, WALL_WIDTH = 4, PADDLE_WIDTH = 4, BALL_SIZE = 4, SPEED = 3;
int playerScore = 0, aiScore = 0, playerPos = 0, aiPos = 0;
char ballDirectionHori = 'R', ballDirectionVerti = 'S';
boolean inProgress = true;
void setup() {
display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
display.display();
}
void loop() {
if (aiScore > 9 || playerScore > 9) {
// check game state
inProgress = false;
}
if (inProgress) {
eraseScore();
eraseBall(ball[0], ball[1]);
if (ballDirectionVerti == 'U') {
// move ball up diagonally
ball[1] = ball[1] - SPEED;
}
if (ballDirectionVerti == 'D') {
// move ball down diagonally
ball[1] = ball[1] + SPEED;
}
if (ball[1] <= 0) { // bounce the ball off the top ballDirectionVerti = 'D'; } if (ball[1] >= resolution[1]) {
// bounce the ball off the bottom
ballDirectionVerti = 'U';
}
if (ballDirectionHori == 'R') {
ball[0] = ball[0] + SPEED; // move ball
if (ball[0] >= (resolution[0] - 6)) {
// ball is at the AI edge of the screen
if ((aiPos + 12) >= ball[1] && (aiPos - 12) <= ball[1]) { // ball hits AI paddle if (ball[1] > (aiPos + 4)) {
// deflect ball down
ballDirectionVerti = 'D';
}
else if (ball[1] < (aiPos - 4)) {
// deflect ball up
ballDirectionVerti = 'U';
}
else {
// deflect ball straight
ballDirectionVerti = 'S';
}
// change ball direction
ballDirectionHori = 'L';
}
else {
// GOAL!
ball[0] = 6; // move ball to other side of screen
ballDirectionVerti = 'S'; // reset ball to straight travel
ball[1] = resolution[1] / 2; // move ball to middle of screen
++playerScore; // increase player score
}
}
}
if (ballDirectionHori == 'L') {
ball[0] = ball[0] - SPEED; // move ball
if (ball[0] <= 6) { // ball is at the player edge of the screen if ((playerPos + 12) >= ball[1] && (playerPos - 12) <= ball[1]) { // ball hits player paddle if (ball[1] > (playerPos + 4)) {
// deflect ball down
ballDirectionVerti = 'D';
}
else if (ball[1] < (playerPos - 4)) { // deflect ball up ballDirectionVerti = 'U'; } else { // deflect ball straight ballDirectionVerti = 'S'; } // change ball direction ballDirectionHori = 'R'; } else { ball[0] = resolution[0] - 6; // move ball to other side of screen ballDirectionVerti = 'S'; // reset ball to straight travel ball[1] = resolution[1] / 2; // move ball to middle of screen ++aiScore; // increase AI score } } } drawBall(ball[0], ball[1]); erasePlayerPaddle(playerPos); playerPos = analogRead(A2); // read player potentiometer playerPos = map(playerPos, 0, 1023, 8, 54); // convert value from 0 - 1023 to 8 - 54 drawPlayerPaddle(playerPos); moveAi(); drawNet(); drawScore(); } else { // somebody has won display.clearDisplay(); display.setTextSize(4); display.setTextColor(WHITE); display.setCursor(0, 0); // figure out who if (aiScore > playerScore) {
display.println("YOU LOSE!");
}
else if (playerScore > aiScore) {
display.println("YOU WIN!");
}
}
display.display();
}
void moveAi() {
// move the AI paddle
eraseAiPaddle(aiPos);
if (ball[1] > aiPos) {
++aiPos;
}
else if (ball[1] < aiPos) {
--aiPos;
}
drawAiPaddle(aiPos);
}
void drawScore() {
// draw AI and player scores
display.setTextSize(2);
display.setTextColor(WHITE);
display.setCursor(45, 0);
display.println(playerScore);
display.setCursor(75, 0);
display.println(aiScore);
}
void eraseScore() {
// erase AI and player scores
display.setTextSize(2);
display.setTextColor(BLACK);
display.setCursor(45, 0);
display.println(playerScore);
display.setCursor(75, 0);
display.println(aiScore);
}
void drawNet() {
for (int i = 0; i < (resolution[1] / WALL_WIDTH); ++i) {
drawPixel(((resolution[0] / 2) - 1), i * (WALL_WIDTH) + (WALL_WIDTH * i), WALL_WIDTH);
}
}
void drawPixel(int posX, int posY, int dimensions) {
// draw group of pixels
for (int x = 0; x < dimensions; ++x) {
for (int y = 0; y < dimensions; ++y) {
display.drawPixel((posX + x), (posY + y), WHITE);
}
}
}
void erasePixel(int posX, int posY, int dimensions) {
// erase group of pixels
for (int x = 0; x < dimensions; ++x) {
for (int y = 0; y < dimensions; ++y) {
display.drawPixel((posX + x), (posY + y), BLACK);
}
}
}
void erasePlayerPaddle(int row) {
erasePixel(0, row - (PADDLE_WIDTH * 2), PADDLE_WIDTH);
erasePixel(0, row - PADDLE_WIDTH, PADDLE_WIDTH);
erasePixel(0, row, PADDLE_WIDTH);
erasePixel(0, row + PADDLE_WIDTH, PADDLE_WIDTH);
erasePixel(0, row + (PADDLE_WIDTH + 2), PADDLE_WIDTH);
}
void drawPlayerPaddle(int row) {
drawPixel(0, row - (PADDLE_WIDTH * 2), PADDLE_WIDTH);
drawPixel(0, row - PADDLE_WIDTH, PADDLE_WIDTH);
drawPixel(0, row, PADDLE_WIDTH);
drawPixel(0, row + PADDLE_WIDTH, PADDLE_WIDTH);
drawPixel(0, row + (PADDLE_WIDTH + 2), PADDLE_WIDTH);
}
void drawAiPaddle(int row) {
int column = resolution[0] - PADDLE_WIDTH;
drawPixel(column, row - (PADDLE_WIDTH * 2), PADDLE_WIDTH);
drawPixel(column, row - PADDLE_WIDTH, PADDLE_WIDTH);
drawPixel(column, row, PADDLE_WIDTH);
drawPixel(column, row + PADDLE_WIDTH, PADDLE_WIDTH);
drawPixel(column, row + (PADDLE_WIDTH * 2), PADDLE_WIDTH);
}
void eraseAiPaddle(int row) {
int column = resolution[0] - PADDLE_WIDTH;
erasePixel(column, row - (PADDLE_WIDTH * 2), PADDLE_WIDTH);
erasePixel(column, row - PADDLE_WIDTH, PADDLE_WIDTH);
erasePixel(column, row, PADDLE_WIDTH);
erasePixel(column, row + PADDLE_WIDTH, PADDLE_WIDTH);
erasePixel(column, row + (PADDLE_WIDTH * 2), PADDLE_WIDTH);
}
void drawBall(int x, int y) {
display.drawCircle(x, y, BALL_SIZE, WHITE);
}
void eraseBall(int x, int y) {
display.drawCircle(x, y, BALL_SIZE, BLACK);
}