content/browser/android/animation_utils.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_BROWSER_ANDROID_ANIMATION_UTILS_H_
   6 #define CONTENT_BROWSER_ANDROID_ANIMATION_UTILS_H_
   7
   8 namespace content {
   9
  10 template <typename T>
  11 T Lerp(T a, T b, T t) {
  12   return a + (b - a) * t;
  13 }
  14
  15 template <typename T>
  16 T Clamp(T value, T low, T high) {
  17   return value < low ? low : (value > high ? high : value);
  18 }
  19
  20 template <typename T>
  21 T Damp(T input, T factor) {
  22   T result;
  23   if (factor == 1) {
  24     result = 1 - (1 - input) * (1 - input);
  25   } else {
  26     result = 1 - std::pow(1 - input, 2 * factor);
  27   }
  28   return result;
  29 }
  30
  31 }  // namespace content
  32
  33 #endif  // CONTENT_BROWSER_ANDROID_ANIMATION_UTILS_H_