commit 4fe6463fc442abbc176d5ef68887670be4019292
Author: Simon Vieille <simon@deblan.fr>
Date:   Fri Jan 26 18:28:36 2024 +0100

    add game of life

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..78bb099
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+gameoflige-go
+gameoflige-go
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..4b62534
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,12 @@
+module gitnet.fr/deblan/gameoflife-go
+
+go 1.21.0
+
+require github.com/tfriedel6/canvas v0.12.1
+
+require (
+	github.com/go-gl/gl v0.0.0-20181026044259-55b76b7df9d2 // indirect
+	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 // indirect
+	github.com/veandco/go-sdl2 v0.4.0 // indirect
+	golang.org/x/image v0.0.0-20200119044424-58c23975cae1 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..4027ac1
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,15 @@
+github.com/go-gl/gl v0.0.0-20181026044259-55b76b7df9d2 h1:78Hza2KHn2PX1jdydQnffaU2A/xM0g3Nx1xmMdep9Gk=
+github.com/go-gl/gl v0.0.0-20181026044259-55b76b7df9d2/go.mod h1:482civXOzJJCPzJ4ZOX/pwvXBWSnzD4OKMdH4ClKGbk=
+github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
+github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 h1:DACJavvAHhabrF08vX0COfcOBJRhZ8lUbR+ZWIs0Y5g=
+github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0/go.mod h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k=
+github.com/tfriedel6/canvas v0.12.1 h1:Oc4gww+cOtix69IaYo8TmRbwpbTl6D1jza2mBM4ZOPo=
+github.com/tfriedel6/canvas v0.12.1/go.mod h1:WIe1YgsQiKA1awmU6tSs8e5DkceDHC5MHgV5vQQZr/0=
+github.com/veandco/go-sdl2 v0.4.0 h1:l9q6K+Dvpd/VlZdw2ufApKnWhAQqx9UL8Zrvbjtm3Lw=
+github.com/veandco/go-sdl2 v0.4.0/go.mod h1:FB+kTpX9YTE+urhYiClnRzpOXbiWgaU3+5F2AB78DPg=
+golang.org/x/exp v0.0.0-20181106170214-d68db9428509/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
+golang.org/x/image v0.0.0-20200119044424-58c23975cae1 h1:5h3ngYt7+vXCDZCup/HkCQgW5XwmSvR/nA2JmJ0RErg=
+golang.org/x/image v0.0.0-20200119044424-58c23975cae1/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
+golang.org/x/mobile v0.0.0-20181026062114-a27dd33d354d/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
+golang.org/x/sys v0.0.0-20181128092732-4ed8d59d0b35/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..74c1219
--- /dev/null
+++ b/main.go
@@ -0,0 +1,109 @@
+package main
+
+import (
+	"math"
+	"math/rand"
+	"os"
+
+	"github.com/tfriedel6/canvas/sdlcanvas"
+	"strconv"
+)
+
+var (
+	squareSize int
+	sizeX      int
+	sizeY      int
+	gameWidth  int
+	gameHeight int
+)
+
+func initTable(sizeX, sizeY int) map[int]map[int]int {
+	table := make(map[int]map[int]int)
+
+	for x := 0; x < sizeX; x++ {
+		table[x] = make(map[int]int)
+
+		for y := 0; y < sizeY; y++ {
+			table[x][y] = rand.Intn(2)
+		}
+	}
+
+	return table
+}
+
+func updateTable(table map[int]map[int]int) map[int]map[int]int {
+	sum := 0
+	newTable := make(map[int]map[int]int)
+
+	for x := 0; x < sizeX; x++ {
+		newTable[x] = make(map[int]int)
+
+		for y := 0; y < sizeY; y++ {
+			sum = getSum(table, x, y)
+
+			if sum == 3 {
+				newTable[x][y] = 1
+			} else if sum > 3 || sum < 2 {
+				newTable[x][y] = 0
+			} else {
+				newTable[x][y] = table[x][y]
+			}
+		}
+	}
+
+	return newTable
+}
+
+func getSum(table map[int]map[int]int, x, y int) int {
+	sum := 0
+
+	sum += table[(sizeX+x-1)%sizeX][(sizeY+y-1)%sizeY]
+	sum += table[x][(sizeY+y-1)%sizeY]
+	sum += table[(sizeX+x+1)%sizeX][(sizeY+y-1)%sizeY]
+	sum += table[(sizeX+x-1)%sizeX][y]
+	sum += table[(sizeX+x+1)%sizeX][y]
+	sum += table[(sizeX+x-1)%sizeX][(sizeY+y+1)%sizeY]
+	sum += table[x][(sizeY+y+1)%sizeY]
+	sum += table[(sizeX+x+1)%sizeX][(sizeY+y+1)%sizeY]
+
+	return sum
+}
+
+func main() {
+	squareSize, _ = strconv.Atoi(os.Args[1])
+	sizeX, _ = strconv.Atoi(os.Args[2])
+	sizeY, _ = strconv.Atoi(os.Args[3])
+	gameWidth = squareSize * sizeX
+	gameHeight = squareSize * sizeY
+
+	table := initTable(sizeX, sizeY)
+
+	wnd, cv, err := sdlcanvas.CreateWindow(gameWidth, gameHeight, "Game of life")
+
+	if err != nil {
+		panic(err)
+	}
+
+	defer wnd.Destroy()
+	w, h := float64(cv.Width()), float64(cv.Height())
+
+	wnd.MainLoop(func() {
+		cv.SetFillStyle("#3f4b7e")
+		cv.FillRect(0, 0, w, h)
+
+		for x := 0; x < sizeX; x++ {
+			for y := 0; y < sizeY; y++ {
+				if table[x][y] == 1 {
+					cv.SetFillStyle(255, 255, 255)
+					cv.BeginPath()
+					// cv.Rect(float64(x*squareSize), float64(y*squareSize), float64(squareSize), float64(squareSize))
+					cv.Arc(float64(x*squareSize), float64(y*squareSize), float64(squareSize)/2, 0, math.Pi*2, false)
+					cv.ClosePath()
+					cv.Fill()
+				}
+			}
+		}
+
+		table = updateTable(table)
+	})
+}