Interactive OLED Face Games

#include <Arduino.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET -1
#define OLED_ADDRESS 0x3C

#define JOY_X_PIN A0
#define JOY_Y_PIN A1
#define JOY_BUTTON_PIN 3
#define TOUCH_PIN 2


// Forward declarations
bool pressedEdge(uint8_t pin);
void drawFace();
void resetGame();
void drawGame();

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

bool gameMode = false;
bool lastTouch = false;
unsigned long lastTouchMs = 0;
unsigned long gameLastStepMs = 0;
unsigned long happyUntilMs = 0;
uint16_t pets = 0;
uint16_t score = 0;
int playerX = 58;
int obstacleX = 20;
int obstacleY = -8;
int obstacleSpeed = 2;

bool pressedEdge(uint8_t pin) {
  static bool lastJoyButton = HIGH;
  bool now = digitalRead(pin);
  bool edge = (lastJoyButton == HIGH && now == LOW);
  lastJoyButton = now;
  return edge;
}

void drawFace() {
  int joyX = analogRead(JOY_X_PIN);
  int joyY = analogRead(JOY_Y_PIN);
  int lookX = map(joyX, 0, 1023, -5, 5);
  int lookY = map(joyY, 0, 1023, -3, 3);
  unsigned long now = millis();
  bool excited = now < happyUntilMs;
  bool blink = !excited && (now % 4200UL) < 140UL;
  int bob = sin((float)now / (excited ? 120.0 : 340.0)) * (excited ? 3 : 2);

  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(2, 0);
  if (excited) display.print(F("YAY! thanks!"));
  else display.print(F("DESK BUDDY  pet me"));

  display.drawRoundRect(20, 7 + bob, 88, 53, 22, SSD1306_WHITE);
  display.drawRoundRect(23, 10 + bob, 82, 47, 19, SSD1306_WHITE);
  if (excited) {
    display.drawLine(27, 16 + bob, 17, 10 + bob, SSD1306_WHITE);
    display.drawLine(101, 16 + bob, 111, 10 + bob, SSD1306_WHITE);
  } else {
    display.drawLine(26, 16 + bob, 18, 20 + bob, SSD1306_WHITE);
    display.drawLine(102, 16 + bob, 110, 20 + bob, SSD1306_WHITE);
  }

  if (blink) {
    display.drawLine(37, 30 + bob, 57, 30 + bob, SSD1306_WHITE);
    display.drawLine(71, 30 + bob, 91, 30 + bob, SSD1306_WHITE);
  } else {
    display.drawCircle(47, 30 + bob, 10, SSD1306_WHITE);
    display.drawCircle(81, 30 + bob, 10, SSD1306_WHITE);
    display.fillCircle(47 + lookX, 30 + bob + lookY, 4, SSD1306_WHITE);
    display.fillCircle(81 + lookX, 30 + bob + lookY, 4, SSD1306_WHITE);
  }

  display.drawLine(64, 34 + bob, 61, 40 + bob, SSD1306_WHITE);
  display.drawLine(61, 40 + bob, 66, 40 + bob, SSD1306_WHITE);
  display.drawLine(48, 48 + bob, 54, 52 + bob, SSD1306_WHITE);
  display.drawLine(54, 52 + bob, 64, 53 + bob, SSD1306_WHITE);
  display.drawLine(64, 53 + bob, 74, 52 + bob, SSD1306_WHITE);
  display.drawLine(74, 52 + bob, 80, 48 + bob, SSD1306_WHITE);
  display.setCursor(2, 56);
  display.print(F("pets:"));
  display.print(pets);
  display.print(F("  touch: game"));
  display.display();
}

void resetGame() {
  playerX = 58;
  obstacleX = random(5, 113);
  obstacleY = -8;
  obstacleSpeed = 2;
  score = 0;
}

void drawGame() {
  int joyX = analogRead(JOY_X_PIN);
  if (joyX < 350 && playerX > 1) playerX -= 3;
  if (joyX > 670 && playerX < 115) playerX += 3;

  unsigned long now = millis();
  if (now - gameLastStepMs > 50) {
    gameLastStepMs = now;
    obstacleY += obstacleSpeed;
    if (obstacleY > 64) {
      obstacleY = -8;
      obstacleX = random(3, 116);
      score++;
      if (score % 5 == 0 && obstacleSpeed < 5) obstacleSpeed++;
    }
  }

  bool hit = obstacleY + 7 >= 54 && obstacleY <= 62 && obstacleX + 7 >= playerX && obstacleX <= playerX + 12;
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0, 0);
  display.print(F("DODGE: "));
  display.print(score);
  display.drawLine(0, 63, 127, 63, SSD1306_WHITE);
  display.fillRect(playerX, 55, 13, 7, SSD1306_WHITE);
  display.drawRect(obstacleX, obstacleY, 8, 8, SSD1306_WHITE);

  if (hit) {
    display.fillRect(18, 21, 92, 20, SSD1306_BLACK);
    display.drawRect(18, 21, 92, 20, SSD1306_WHITE);
    display.setCursor(27, 26);
    display.print(F("GAME OVER"));
    display.setCursor(23, 33);
    display.print(F("press stick"));
    display.display();
    while (digitalRead(JOY_BUTTON_PIN) == HIGH) {
      if (digitalRead(TOUCH_PIN) == HIGH) return;
      delay(5);
    }
    resetGame();
    delay(200);
    return;
  }
  display.display();
}

void setup() {
  pinMode(JOY_BUTTON_PIN, INPUT_PULLUP);
  pinMode(TOUCH_PIN, INPUT);
  randomSeed(analogRead(A2));
  if (!display.begin(SSD1306_SWITCHCAPVCC, OLED_ADDRESS)) {
    for (;;) { }
  }
  display.clearDisplay();
  display.setTextColor(SSD1306_WHITE);
  display.setTextSize(1);
  display.setCursor(17, 25);
  display.print(F("FACE CONSOLE"));
  display.display();
  delay(900);
  resetGame();
}

void loop() {
  bool touchNow = digitalRead(TOUCH_PIN) == HIGH;
  if (touchNow && !lastTouch && millis() - lastTouchMs > 250) {
    lastTouchMs = millis();
    if (gameMode) {
      gameMode = false;
    } else {
      pets++;
      happyUntilMs = millis() + 1600UL;
    }
  }
  if (!gameMode && pressedEdge(JOY_BUTTON_PIN)) {
    gameMode = true;
    resetGame();
  }
  lastTouch = touchNow;

  if (gameMode) {
    drawGame();
  } else {
    drawFace();
  }
  delay(20);
}