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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
| 5 library animation_mechanics; |
| 6 |
5 import 'dart:math' as math; | 7 import 'dart:math' as math; |
6 | 8 |
7 const double kGravity = -0.980; // m^s-2 | 9 const double kGravity = -0.980; // m^s-2 |
8 | 10 |
9 abstract class System { | 11 abstract class System { |
10 void update(double deltaT); | 12 void update(double deltaT); |
11 } | 13 } |
12 | 14 |
13 class Particle extends System { | 15 class Particle extends System { |
14 final double mass; | 16 final double mass; |
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204 | 206 |
205 void update(double deltaT) { | 207 void update(double deltaT) { |
206 _currentSystem.update(deltaT); | 208 _currentSystem.update(deltaT); |
207 } | 209 } |
208 | 210 |
209 void transitionToSystem(System system) { | 211 void transitionToSystem(System system) { |
210 assert(system != null); | 212 assert(system != null); |
211 _currentSystem = system; | 213 _currentSystem = system; |
212 } | 214 } |
213 } | 215 } |
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