2020 Day 19 & 20 Complete

helpers/coordinate.go

@@ -14,6 +14,10 @@ func NewCoordinate(x, y int) *Coordinate {
 	return &Coordinate{x, y}
 }
 
+func (c Coordinate) Relative(t Coordinate) Coordinate {
+	return Coordinate{X: c.X + t.X, Y: c.Y + t.Y}
+}
+
 func (c *Coordinate) North() Coordinate {
 	return Coordinate{X: c.X, Y: c.Y - 1}
 }