From 30a8e04b7ee3fade11f7ec0f1a23c8006ca15b6d Mon Sep 17 00:00:00 2001
From: Hans Muller <hansmuller@chromium.org>
Date: Thu, 1 Oct 2015 09:03:19 -0700
Subject: [PATCH] Added missing clamped_simulation.dart file

---
 packages/flutter/lib/animation.dart           |  1 +
 .../lib/src/animation/clamped_simulation.dart | 28 +++++++++++++++++++
 2 files changed, 29 insertions(+)
 create mode 100644 packages/flutter/lib/src/animation/clamped_simulation.dart

diff --git a/packages/flutter/lib/animation.dart b/packages/flutter/lib/animation.dart
index 4c449e2d97..f35b2538bb 100644
--- a/packages/flutter/lib/animation.dart
+++ b/packages/flutter/lib/animation.dart
@@ -10,6 +10,7 @@ library animation;
 export 'src/animation/animated_simulation.dart';
 export 'src/animation/animated_value.dart';
 export 'src/animation/animation_performance.dart';
+export 'src/animation/clamped_simulation.dart';
 export 'src/animation/curves.dart';
 export 'src/animation/forces.dart';
 export 'src/animation/scheduler.dart';
diff --git a/packages/flutter/lib/src/animation/clamped_simulation.dart b/packages/flutter/lib/src/animation/clamped_simulation.dart
new file mode 100644
index 0000000000..d3d14c7dd2
--- /dev/null
+++ b/packages/flutter/lib/src/animation/clamped_simulation.dart
@@ -0,0 +1,28 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:newton/newton.dart';
+
+class ClampedSimulation extends Simulation {
+  ClampedSimulation(this.simulation, {
+    this.xMin: double.NEGATIVE_INFINITY,
+    this.xMax: double.INFINITY,
+    this.dxMin: double.NEGATIVE_INFINITY,
+    this.dxMax: double.INFINITY
+  }) {
+    assert(simulation != null);
+    assert(xMax >= xMin);
+    assert(dxMax >= dxMin);
+  }
+
+  final Simulation simulation;
+  final double xMin;
+  final double xMax;
+  final double dxMin;
+  final double dxMax;
+
+  double x(double time) => simulation.x(time).clamp(xMin, xMax);
+  double dx(double time) => simulation.dx(time).clamp(dxMin, dxMax);
+  bool isDone(double time) => simulation.isDone(time);
+}