Watchy-Life

README.md

Watchy-Life

Adaptation of Conoway's game of life for Watchy-Screen

This code assumes a couple of things:

1. You have a shared.h file with a MainScreen function that returns to the main screen. If you don't, you will need to adjust the lifegame.h
2. You are putting these files into a src/Screens directory (see where the default screens go in Watchy-Screen

Much of the logic in this code is taken from here. Thus, most of the comments are incorrect.

Known Bugs:

• spawning a glider does not work

Enjoy!

lifegame.cpp

// Conoway's Game Of Life -- Watchy Implementation
// Adaptation of
// https://github.com/Stavrosfil/game-of-life-esp32/blob/master/src/main.cpp

#include "lifegame.h"

#define SCREEN_WIDTH 25   // OLED display width, in pixels
#define SCREEN_HEIGHT 25  // OLED display height, in pixels

// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)

RTC_DATA_ATTR short int g[SCREEN_HEIGHT][SCREEN_WIDTH];
short int arrayCopy[SCREEN_HEIGHT][SCREEN_WIDTH];
RTC_DATA_ATTR bool isfirstshow = true;

void createRandomMatrix(short int (&a)[SCREEN_HEIGHT][SCREEN_WIDTH]) {
  for (int i = 0; i < SCREEN_HEIGHT; i++) {
    for (int j = 0; j < SCREEN_WIDTH; j++) {
      g[i][j] = round((float)rand() / (float)RAND_MAX);
    }
  }
}

void gameOfLife(short int (&a)[SCREEN_HEIGHT][SCREEN_WIDTH]) {
  for (int i = 0; i < SCREEN_HEIGHT; i++) {
    for (int j = 0; j < SCREEN_WIDTH; j++) {
      arrayCopy[i][j] = a[i][j];
    }
  }

  for (int i = 0; i < SCREEN_HEIGHT; i++) {
    for (int j = 0; j < SCREEN_WIDTH; j++) {
      int total =
          (a[i][(j - 1) % SCREEN_WIDTH] + a[i][(j + 1) % SCREEN_WIDTH] +
           a[(i - 1) % SCREEN_HEIGHT][j] + a[(i + 1) % SCREEN_HEIGHT][j] +
           a[(i - 1) % SCREEN_HEIGHT][(j - 1) % SCREEN_WIDTH] +
           a[(i - 1) % SCREEN_HEIGHT][(j + 1) % SCREEN_WIDTH] +
           a[(i + 1) % SCREEN_HEIGHT][(j - 1) % SCREEN_WIDTH] +
           a[(i + 1) % SCREEN_HEIGHT][(j + 1) % SCREEN_WIDTH]);


      if (a[i][j] == 0) { // cell is dead
        if (total == 3) { // exactly three neighbors
          arrayCopy[i][j] = 1;
        }
      } else if (a[i][j] == 1) { // cell is alive
        if (total < 2) { // fewer than two neigbors
            arrayCopy[i][j] = 0;
        }
        if (total > 3) { // greater than three neighbors
            arrayCopy[i][j] = 0;
        }
      }


    }
  }

  for (int i = 0; i < SCREEN_HEIGHT; i++) {
    for (int j = 0; j < SCREEN_WIDTH; j++) {
      a[i][j] = arrayCopy[i][j];
    }
  }
}

void addGlider(int i1, int j1, short int (&a)[SCREEN_HEIGHT][SCREEN_WIDTH]) {
  int glider[3][3] = {{0, 0, 1}, {1, 0, 1}, {0, 1, 1}};
  for (int i = 0; i < 3; i++) {
    for (int j = 0; j < 3; j++) {
      a[i1 + i][j1 + j] = glider[i][j];
    }
  }
}

void WatchyLife::show() {
  if (isfirstshow) {
    createRandomMatrix(g);
  } else {
    gameOfLife(g);
  }

  isfirstshow = false;
  // Watchy::display.fillScreen(GxEPD_WHITE);

  for (int i = 0; i < SCREEN_HEIGHT; i++) {
    for (int j = 0; j < SCREEN_WIDTH; j++) {
      if (g[i][j] == 1) {
        Watchy::display.fillRect(j * 8, i * 8, 8, 8, GxEPD_BLACK);
        // Serial.println("1");
      } else {
        // Serial.println("0");
        Watchy::display.fillRect(j * 8, i * 8, 8, 8, GxEPD_WHITE);
      }
    }
  }
}
void WatchyLife::up() { createRandomMatrix(g); }
void WatchyLife::down() {
  show();
  Watchy::display.display(true);
}
void WatchyLife::menu() {
    addGlider(5,5,g);
}

lifegame.h

#include "Shared.h"
#include "Screen.h"

class WatchyLife : public Screen {
    void back() {MainScreen();};
    void show();
    void up();
    void down();
    void menu();
};