1 files changed, 17 insertions, 2 deletions
diff --git a/geometry.go b/geometry.go
index 89eb1ed..0d90c6f 100644
--- a/geometry.go
+++ b/geometry.go
@@ -1,6 +1,21 @@
 package main
 
-import "image"
+import (
+	"image"
+	"math"
+)
 
-type Rectangle = image.Rectangle
 type Point = image.Point
+type Rectangle = image.Rectangle
+
+func Distance(p1, p2 Point) float64 {
+	return math.Sqrt(math.Pow(float64(p1.X-p2.X), 2) + math.Pow(float64(p1.Y-p2.Y), 2))
+}
+
+func Length(p Point) float64 {
+	return Distance(p, Point{0, 0})
+}
+
+func Normalize(p Point) Point {
+	return p.Div(int(Length(p)))
+}