upd methods

engine/types/coords.go

@@ -1,9 +1,32 @@
 package types
 
+import "math"
+
 type Coords struct {
 	X, Y int
 }
 
-func (c *Coords) Get() (int,int) {
-	return c.X,c.Y
+func (c *Coords) Get() (int, int) {
+	return c.X, c.Y
+}
+
+func (c *Coords) DistanceTo(o *Coords) float64 {
+	dx := c.X - o.X
+	dy := c.X - o.Y
+	return math.Sqrt(math.Pow(float64(dx), 2) + math.Pow(float64(dy), 2))
+}
+
+func (c *Coords) IsAdjacentTo(o *Coords) bool {
+	var xDiff, yDiff int
+	if c.X > o.X {
+		xDiff = c.X - o.X
+	} else {
+		xDiff = o.X - c.X
+	}
+	if c.Y > o. Y {
+		yDiff = c.Y - o.Y
+	} else {
+		yDiff = o.Y - c.Y
+	}
+	return xDiff < 2 && yDiff < 2
 }