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life.go
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life.go
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// ==== RULES ====
// Any live cell with fewer than two live neighbors dies, as if by underpopulation.
// Any live cell with two or three live neighbors lives on to the next generation.
// Any live cell with more than three live neighbors dies, as if by overpopulation.
// Any dead cell with exactly three live neighbors becomes a live cell, as if by reproduction.
/*
Implementation of the game of life by Zetsuban
*/
package main
import (
"flag"
"fmt"
"os"
"time"
termbox "github.com/nsf/termbox-go"
"github.com/zetsuban/game-of-life/entities"
)
var col = flag.Int("c", -1, "number of columns")
var row = flag.Int("r", -1, "number of rows")
var glider = flag.Bool("g", false, "use the glider as start")
var tumbler = flag.Bool("t", false, "use the tumbler as start")
var exploder = flag.Bool("e", false, "use the exploder as start")
var line = flag.Bool("l", false, "use the line as start")
var step = flag.Bool("S", false, "step by step")
var sleepTime = flag.Int("s", 250, "ms between each generations")
var cmd = flag.Bool("cmd", false, "display without using termbox-go")
var help = flag.Bool("h", false, "displays help")
var infinit = true
// Usage displays helpfull message
func Usage() {
fmt.Fprintf(os.Stderr, "Usage: life [options]\n")
flag.PrintDefaults()
os.Exit(1)
}
func displayCmd(world entities.World, gen int) {
for i := 0; i < 200; i++ {
fmt.Println()
}
fmt.Print("Generation : ", gen, "\n\n")
for i := 0; i < world.Row; i++ {
for j := 0; j < world.Col; j++ {
fmt.Print(world.Cells[i][j].Str() + " ")
}
fmt.Println()
}
}
// displayWorld : displays world using termbox
func displayWorld(world entities.World) {
for i := 0; i < world.Row; i++ {
for j := 0; j < world.Col; j++ {
if world.Cells[i][j].Alive() {
termbox.SetCell(j, i, world.Cells[i][j].Rune(), termbox.ColorDefault, termbox.ColorMagenta)
} else {
termbox.SetCell(j, i, world.Cells[i][j].Rune(), termbox.ColorDefault, termbox.ColorDefault)
}
}
}
termbox.Flush()
}
// Sleep : delay the next generation
func Sleep() {
if *step {
for {
ev := termbox.PollEvent()
if ev.Ch == 'p' {
return
}
if ev.Key == termbox.KeySpace {
return
}
}
} else {
time.Sleep(time.Duration(*sleepTime) * time.Millisecond)
}
}
func presets(world entities.World) {
if *glider {
world.Glider()
} else if *tumbler {
world.Tumbler()
} else if *exploder {
world.Exploder()
} else if *line {
world.Line()
} else {
world.Start()
}
}
func main() {
flag.Usage = Usage
flag.Parse()
if *help {
Usage()
}
go inputLoop()
if *cmd {
CmdMain()
} else {
TBMain()
}
}
// CmdMain : Cmd main loop
func CmdMain() {
gen := 0
// Default value if user didn't specify size
if *row < 0 {
*row = 50
}
if *col < 0 {
*col = 50
}
// Generate new world and base alive cells
world := entities.NewWorld(*row, *col)
presets(world)
Play(world, gen)
}
// TBMain : Termbox main loop
func TBMain() {
err := termbox.Init()
if err != nil {
panic(err)
}
defer termbox.Close()
// var
gen := 0
// Get screen dimensions
termCols, termRows := termbox.Size()
// Use term size if user didn't specify
if *row < 0 {
*row = termRows
}
if *col < 0 {
*col = termCols
}
// Generate new world and base alive cells
world := entities.NewWorld(*row, *col)
presets(world)
termbox.SetInputMode(termbox.InputEsc)
// termbox.HideCursor()
termbox.Clear(termbox.ColorDefault, termbox.ColorDefault)
Play(world, gen)
}
// Play : Main play loop
func Play(world entities.World, gen int) {
// TODO : Revisite loop
for infinit {
if *cmd {
displayCmd(world, gen)
} else {
displayWorld(world)
}
world = world.NextGen()
Sleep()
gen++
}
}