Index: sky/framework/animation/curves.dart |
diff --git a/sky/framework/animation/curves.dart b/sky/framework/animation/curves.dart |
deleted file mode 100644 |
index 8e285762e7e424a2d4530797e52113f6038b9fa9..0000000000000000000000000000000000000000 |
--- a/sky/framework/animation/curves.dart |
+++ /dev/null |
@@ -1,72 +0,0 @@ |
-// 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. |
- |
-double _evaluateCubic(double a, double b, double m) { |
- // TODO(abarth): Would Math.pow be faster? |
- return 3 * a * (1 - m) * (1 - m) * m + 3 * b * (1 - m) * m * m + m * m * m; |
-} |
- |
-const double _kCubicErrorBound = 0.001; |
- |
-abstract class Curve { |
- double transform(double t); |
-} |
- |
-class Linear implements Curve { |
- const Linear(); |
- |
- double transform(double t) { |
- return t; |
- } |
-} |
- |
-class ParabolicFall implements Curve { |
- const ParabolicFall(); |
- |
- double transform(double t) { |
- return -t*t + 1; |
- } |
-} |
- |
-class ParabolicRise implements Curve { |
- const ParabolicRise(); |
- |
- double transform(double t) { |
- return -(t-1)*(t-1) + 1; |
- } |
-} |
- |
-class Cubic implements Curve { |
- final double a; |
- final double b; |
- final double c; |
- final double d; |
- |
- const Cubic(this.a, this.b, this.c, this.d); |
- |
- double transform(double t) { |
- double start = 0.0; |
- double end = 1.0; |
- while (true) { |
- double midpoint = (start + end) / 2; |
- double estimate = _evaluateCubic(a, c, midpoint); |
- |
- if ((t - estimate).abs() < _kCubicErrorBound) |
- return _evaluateCubic(b, d, midpoint); |
- |
- if (estimate < t) |
- start = midpoint; |
- else |
- end = midpoint; |
- } |
- } |
-} |
- |
-const Linear linear = const Linear(); |
-const Cubic ease = const Cubic(0.25, 0.1, 0.25, 1.0); |
-const Cubic easeIn = const Cubic(0.42, 0.0, 1.0, 1.0); |
-const Cubic easeOut = const Cubic(0.0, 0.0, 0.58, 1.0); |
-const Cubic easeInOut = const Cubic(0.42, 0.0, 0.58, 1.0); |
-const ParabolicRise parabolicRise = const ParabolicRise(); |
-const ParabolicFall parabolicFall = const ParabolicFall(); |