1 files changed, 24 insertions, 0 deletions
diff --git a/src/main/scala/sims/util/RelativeVector.scala b/src/main/scala/sims/util/RelativeVector.scala
new file mode 100644
index 0000000..374f92c
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+++ b/src/main/scala/sims/util/RelativeVector.scala
@@ -0,0 +1,24 @@
+/*
+ * Simple Mechanics Simulator (SiMS)
+ * copyright (c) 2009 Jakob Odersky
+ * made available under the MIT License
+*/
+
+package sims.util
+
+import sims.geometry._
+import sims.dynamics._
+
+class RelativeVector(val x: Double, val y: Double) {
+  def above(point: Vector2D): Vector2D = point + Vector2D(0, x)
+  def below(point: Vector2D): Vector2D = point - Vector2D(0, x)
+  def left(point: Vector2D): Vector2D = point - Vector2D(x, 0)
+  def right(point: Vector2D): Vector2D = point + Vector2D(x, 0)
+  def from(point: Vector2D): Vector2D = point + Vector2D(x, y)
+  
+  def above(s: Shape): Vector2D = this.above(s.pos)
+  def below(s: Shape): Vector2D = this.below(s.pos)
+  def left(s: Shape): Vector2D = this.left(s.pos)
+  def right(s: Shape): Vector2D = this.right(s.pos)
+  def from(s: Shape): Vector2D = this.from(s.pos)  
+}