1 files changed, 54 insertions, 0 deletions
diff --git a/src/test/scala/sims/test/gui/scenes/LongCollisionScene.scala b/src/test/scala/sims/test/gui/scenes/LongCollisionScene.scala
new file mode 100644
index 0000000..d153f1b
--- /dev/null
+++ b/src/test/scala/sims/test/gui/scenes/LongCollisionScene.scala
@@ -0,0 +1,54 @@
+package sims.test.gui
+package scenes
+
+import sims.dynamics._
+import sims.math._
+import sims.dynamics._
+
+object LongCollisionScene extends Scene {
+	override def description = "A test to verify conservation in a collision."
+	
+	def makeBodies() = (for (i <- 0 until 10) yield {
+		new Circle(0.2) {
+			position = Vector2D(0 + 2.01 * radius * i, 0)
+			restitution = 0.8
+		}
+	}.asBody) ++ (for (i <- 0 until 10) yield {
+		new Circle(0.2) {
+			position = Vector2D(6 + 2.01 * radius * i, 0)
+			restitution = 0.8
+		}
+	}.asBody)
+		
+	override def init() = {
+		val bodies = makeBodies()
+		bodies(0).fixed = true
+		bodies(19).fixed = true
+		for (b <- bodies) world += b
+		world.gravity = Vector2D.Null
+		
+		val bullet = new Body(new Circle(0.2) {
+			position = Vector2D(5, 0)
+			restitution = 0.8}) {
+			linearVelocity = Vector2D(3, 0)
+		}
+		world += bullet
+		
+		world.iterations = 10
+		
+		registerListeners()
+	}
+	
+	def registerListeners() = {
+		reactions += {
+			case Stepped(`world`) => println(
+					"P: " + world.bodies.map(P(_)).sum.toFloat + 
+					"\tE: " + world.bodies.map(E(_)).sum.toFloat
+				)
+		}
+	}
+	
+	def P(b: Body) = if (b.fixed) 0 else b.linearMomentum.length
+	def E(b: Body) = if (b.fixed) 0 else (b.linearVelocity dot b.linearVelocity) * b.mass * 0.5
+
+}
+\ No newline at end of file