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package main
import (
"flag"
"math/rand"
"time"
"golang.org/x/image/colornames"
"github.com/faiface/pixel"
"github.com/faiface/pixel/examples/community/game_of_life/life"
"github.com/faiface/pixel/imdraw"
"github.com/faiface/pixel/pixelgl"
)
var (
size *int
windowSize *float64
frameRate *int64
)
func init() {
rand.Seed(time.Now().UnixNano())
size = flag.Int("size", 5, "The size of each cell")
windowSize = flag.Float64("windowSize", 800, "The pixel size of one side of the grid")
frameRate = flag.Int64("frameRate", 33, "The framerate in milliseconds")
flag.Parse()
}
func main() {
pixelgl.Run(run)
}
func run() {
cfg := pixelgl.WindowConfig{
Title: "Pixel Rocks!",
Bounds: pixel.R(0, 0, *windowSize, *windowSize),
VSync: true,
}
win, err := pixelgl.NewWindow(cfg)
if err != nil {
panic(err)
}
win.Clear(colornames.White)
// since the game board is square, rows and cols will be the same
rows := int(*windowSize) / *size
gridDraw := imdraw.New(nil)
game := life.NewLife(rows, *size)
last := time.Now()
for !win.Closed() {
// game loop
if time.Since(last).Nanoseconds() > *frameRate {
gridDraw.Clear()
game.A.Draw(gridDraw)
gridDraw.Draw(win)
game.Step()
last = time.Now()
}
win.Update()
}
}