diff options
Diffstat (limited to 'src/test/scala/sims/test/gui/scenes/LongCollisionScene.scala')
-rw-r--r-- | src/test/scala/sims/test/gui/scenes/LongCollisionScene.scala | 54 |
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 |