added reset

grid.go

@@ -4,6 +4,7 @@ import (
 	"bufio"
 	"errors"
 	"fmt"
+	"math/rand"
 	"os"
 	"strconv"
 	"strings"
@@ -40,6 +41,26 @@ func (grid *Grid) Clone() *Grid {
 	return newgrid
 }
 
+func (grid *Grid) Clear() {
+	for y := range grid.Data {
+		for x := range grid.Data[y] {
+			grid.Data[y][x] = 0
+		}
+	}
+}
+
+func (grid *Grid) FillRandom(game *Game) {
+	if !game.Empty {
+		for y := range grid.Data {
+			for x := range grid.Data[y] {
+				if rand.Intn(game.Density) == 1 {
+					grid.Data[y][x] = 1
+				}
+			}
+		}
+	}
+}
+
 func GetFilename(generations int64) string {
 	now := time.Now()
 	return fmt.Sprintf("dump-%s-%d.gol", now.Format("20060102150405"), generations)