From 1610816e8aba3c86c4332167f984731eee7b6d32 Mon Sep 17 00:00:00 2001
From: Stephen McQuay <stephen@mcquay.me>
Date: Tue, 3 Sep 2013 23:32:57 -0700
Subject: [PATCH] moved geom.go into this repo

---
 vectorpoint.go | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/vectorpoint.go b/vectorpoint.go
index ccf2dcd..704dddc 100644
--- a/vectorpoint.go
+++ b/vectorpoint.go
@@ -69,3 +69,14 @@ func (v Vector2d) Normalize() Vector2d {
 	m := v.Mag()
 	return Vector2d{v.X / m, v.Y / m}
 }
+
+func Move(d1, d2 Point2d, velocity float64, timeDelta float64) Point2d {
+	v := d2.Sub(d1)
+	v_norm := v.Normalize()
+	v_scaled := v_norm.Scale(velocity * timeDelta)
+	return d1.Add(v_scaled)
+}
+
+func Distance(p1, p2 Point2d) float64 {
+	return p1.Sub(p2).Mag()
+}