Add more comments

1 files changed, 19 insertions, 9 deletions

diff --git a/main.go b/main.go
index c212e5b..6bc8ce0 100644
--- a/main.go
+++ b/main.go
@@ -22,17 +22,23 @@ func GetKey() []byte {
 }
 
 func main() {
-	rand.Seed(time.Now().UnixNano())
-	var f tris.Field
-	var floor, topout, harddrop bool
+	rand.Seed(time.Now().UnixNano()) // to start with truly random pieces
+	var f tris.Field // the playing field (10x20)
+	var floor, topout, harddrop bool // state machine variables to check special situations
+
+	// define outside of game loop to avoid accidental resets of position
+	// x, y and rot are the values calculated to feed to Move
+	// which then checks collisions and does the wall kicks
 	var x, y int
 	var rot tris.Rotation
-	var key []byte
+
+	// init variable for pressed key - MUST be initialized 3 long to avoid crash, GetKey() does this
+	key := GetKey()
+
 	fmt.Print("\033[2J") // Clear screen
 	b := tris.NewBag()
 	b, p := b.Pick()
 	t := time.Tick(time.Second)
-	key = GetKey()
 	for {
 		x, y, rot = p.X, p.Y, p.Rot
 		if !harddrop {
@@ -76,19 +82,23 @@ func main() {
 				y = p.Y + 1
 			}
 		}
-		p, floor, topout = p.Move(f, rot, x, y)
+		p, floor, topout = p.Move(f, rot, x, y) // Check if the piece can move, then do it and communicate back for housekeeping
+
+		// Give some time before actually locking in to enable tucks
+		// This code runs when the time is over
 		if floor && p.Lock.Add(tris.LockDelay).Before(time.Now()) {
 			harddrop = false
 			var l int
 			f = f.Add(p)
-			l, f = f.Lines()
+			l, f = f.Lines() // count and remove full lines
 			if l > 0 {
-				fmt.Println(l, " lines removed!")
+				fmt.Println(l, "lines removed!")
 				time.Sleep(time.Second)
 			}
 			fmt.Print("\033[2J") // Clear screen
-			b, p = b.Pick()
+			b, p = b.Pick() // ... and pick a new piece from the bag
 		}
+		// when not touching a piece or floor below yet, reset lock delay
 		if !floor {
 			p.Lock = time.Now()
 		}