moved geom.go into this repo

2013-09-03 23:32:57 -07:00 · 2013-09-03 23:32:57 -07:00 · 1610816e8a
parent abb7daf18d
commit 1610816e8a
1 changed files with 11 additions and 0 deletions
--- 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()
+}