Game Of Life
#include <vector>
int cellSize = 5;
float probabilityOfAliveAtStart = 15;
int interval = 100;
int lastRecordedTime = 0;
int alive;
int dead;
std::vector<std::vector<int>> cells;
std::vector<std::vector<int>> cellsBuffer;
bool pause = false;
void setup() {
size(640, 360);
alive = color(0, 200, 0);
dead = color(0);
int cols = width / cellSize;
int rows = height / cellSize;
cells.resize(cols, std::vector<int>(rows));
cellsBuffer.resize(cols, std::vector<int>(rows));
stroke(48);
noSmooth();
background(0);
for (int x = 0; x < cols; x++) {
for (int y = 0; y < rows; y++) {
float state = random(100);
if (state > probabilityOfAliveAtStart) state = 0;
else state = 1;
cells[x][y] = (int)state;
}
}
}
void draw() {
int cols = width / cellSize;
int rows = height / cellSize;
for (int x = 0; x < cols; x++) {
for (int y = 0; y < rows; y++) {
if (cells[x][y] == 1) fill(alive);
else fill(dead);
rect(x * cellSize, y * cellSize, cellSize, cellSize);
}
}
if (millis() - lastRecordedTime > interval) {
if (!pause) {
iteration();
lastRecordedTime = millis();
}
}
if (pause && _mousePressed) {
int xCellOver = (int)map(mouseX, 0, width, 0, width / cellSize);
int yCellOver = (int)map(mouseY, 0, height, 0, height / cellSize);
xCellOver = constrain(xCellOver, 0, width / cellSize - 1);
yCellOver = constrain(yCellOver, 0, height / cellSize - 1);
if (cellsBuffer[xCellOver][yCellOver] == 1) {
cells[xCellOver][yCellOver] = 0;
fill(dead);
} else {
cells[xCellOver][yCellOver] = 1;
fill(alive);
}
}
else if (pause && !_mousePressed) {
for (int x = 0; x < width / cellSize; x++) {
for (int y = 0; y < height / cellSize; y++) {
cellsBuffer[x][y] = cells[x][y];
}
}
}
}
void iteration() {
int cols = width / cellSize;
int rows = height / cellSize;
for (int x = 0; x < cols; x++) {
for (int y = 0; y < rows; y++) {
cellsBuffer[x][y] = cells[x][y];
}
}
for (int x = 0; x < cols; x++) {
for (int y = 0; y < rows; y++) {
int neighbours = 0;
for (int xx = x - 1; xx <= x + 1; xx++) {
for (int yy = y - 1; yy <= y + 1; yy++) {
if (xx >= 0 && xx < cols && yy >= 0 && yy < rows) {
if (!(xx == x && yy == y)) {
if (cellsBuffer[xx][yy] == 1) {
neighbours++;
}
}
}
}
}
if (cellsBuffer[x][y] == 1) {
if (neighbours < 2 || neighbours > 3) {
cells[x][y] = 0;
}
} else {
if (neighbours == 3) {
cells[x][y] = 1;
}
}
}
}
}
void keyPressed() {
int cols = width / cellSize;
int rows = height / cellSize;
if (key == 'r' || key == 'R') {
for (int x = 0; x < cols; x++) {
for (int y = 0; y < rows; y++) {
float state = random(100);
if (state > probabilityOfAliveAtStart) state = 0;
else state = 1;
cells[x][y] = (int)state;
}
}
}
if (key == ' ') {
pause = !pause;
}
if (key == 'c' || key == 'C') {
for (int x = 0; x < cols; x++) {
for (int y = 0; y < rows; y++) {
cells[x][y] = 0;
}
}
}
}