Created
June 7, 2017 21:57
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Game of Life
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package main | |
import ( | |
"bytes" | |
"fmt" | |
"math/rand" | |
"os" | |
"os/exec" | |
"strconv" | |
"strings" | |
"time" | |
) | |
func createBoard(height int, width int, living int) [][]string { | |
random := rand.New(rand.NewSource(time.Now().UnixNano())) | |
board := make([][]string, height) | |
for y := range board { | |
for i := 0; i < width; i++ { | |
if random.Intn(100) < living { | |
board[y] = append(board[y], alive) | |
} else { | |
board[y] = append(board[y], dead) | |
} | |
} | |
} | |
return board | |
} | |
func printBoard(board [][]string) { | |
var buffer bytes.Buffer | |
for _, row := range board { | |
for _, cell := range row { | |
buffer.WriteString(cell) | |
} | |
buffer.WriteString("\n") | |
} | |
fmt.Println(buffer.String()) | |
} | |
func countLivingNeighbours(x int, y int, board [][]string) int { | |
liveCount := 0 | |
for i := y - 1; i <= y+1; i++ { | |
for j := x - 1; j <= x+1; j++ { | |
if i == y && j == x { | |
continue | |
} else if i >= 0 && i < len(board) && j >= 0 && j < len(board[0]) { | |
if board[i][j] == alive { | |
liveCount++ | |
} | |
} | |
} | |
} | |
return liveCount | |
} | |
func tick(board [][]string) [][]string { | |
newBoard := make([][]string, len(board)) | |
for i := range board { | |
for j, cell := range board[i] { | |
count := countLivingNeighbours(j, i, board) | |
if cell == alive { | |
switch { | |
case count < 2: | |
newBoard[i] = append(newBoard[i], dead) | |
case count >= 2 && count <= 3: | |
newBoard[i] = append(newBoard[i], alive) | |
case count > 3: | |
newBoard[i] = append(newBoard[i], dead) | |
} | |
} else if cell == dead { | |
if count == 3 { | |
newBoard[i] = append(newBoard[i], alive) | |
} else { | |
newBoard[i] = append(newBoard[i], dead) | |
} | |
} | |
} | |
} | |
return newBoard | |
} | |
func determineBoardSize() []int { | |
cmd := exec.Command("stty", "size") | |
cmd.Stdin = os.Stdin | |
out, _ := cmd.Output() | |
dims := strings.Split(strings.Trim(string(out), "\n"), " ") | |
height, width := dims[0], dims[1] | |
heightInt, _ := strconv.Atoi(height) | |
widthInt, _ := strconv.Atoi(width) | |
return []int{heightInt, widthInt} | |
} | |
const alive string = "█" | |
const dead string = " " | |
const delay time.Duration = 30 * time.Millisecond | |
const initialPopulationPercentage int = 20 | |
func main() { | |
boardSize := determineBoardSize() | |
board := createBoard(boardSize[0], boardSize[1], initialPopulationPercentage) | |
for { | |
print("\033[H\033[2J") | |
board = tick(board) | |
printBoard(board) | |
time.Sleep(delay) | |
} | |
} |
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