auto reset checking across 2 generations at a time

conway.go

@@ -37,6 +37,17 @@ func (c *Cell) NeighborCount(arr [][]Cell) uint {
 	return count
 }
 
+func compareGrids(a, b [][]Cell) bool {
+	for i := 0; i < len(a); i++ {
+		for j := 0; j < len(a[0]); j++ {
+			if a[i][j].live != b[i][j].live {
+				return false
+			}
+		}
+	}
+	return true
+}
+
 func initGrid(width, height uint, parent ...[][]Cell) ([][]Cell, error) {
 	exists := len(parent) == 1
 	if exists && len(parent) > 1 {
@@ -65,20 +76,32 @@ func initGrid(width, height uint, parent ...[][]Cell) ([][]Cell, error) {
 
 func setup(callback func([][]Cell), scale, width, height uint, FPS time.Duration) chan bool {
 	// Initialize grid at specified scale
-	grid, _ := initGrid(width/scale, height/scale)
+	gridWidth := width / scale
+	gridHeight := height / scale
+	grid, _ := initGrid(gridWidth, gridHeight)
 
 	// Prepare ticker and finishing flag
 	ticker := time.NewTicker((1000 / FPS) * time.Millisecond)
 	done := make(chan bool)
 
 	// Run game loop
+	var parent [][]Cell
 	go func() {
 		for {
 			select {
 			case <-done:
 				return
 			case <-ticker.C:
-				grid = draw(grid, callback)
+				temp := draw(grid, callback)
+
+				if parent != nil && compareGrids(parent, temp) {
+					parent = nil
+					grid, _ = initGrid(gridWidth, gridHeight)
+				} else {
+					parent, _ = initGrid(gridWidth, gridHeight, grid)
+					grid = temp
+				}
+
 			}
 		}
 	}()