content: /*
   * Copyright (C) 2010 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package android.animation;
  
  /**
   * A time interpolator defines the rate of change of an animation. This allows animations
   * to have non-linear motion, such as acceleration and deceleration.
   */
  public interface TimeInterpolator {
  
      /**
       * Maps a value representing the elapsed fraction of an animation to a value that represents
       * the interpolated fraction. This interpolated value is then multiplied by the change in
       * value of an animation to derive the animated value at the current elapsed animation time.
       *
       * @param input A value between 0 and 1.0 indicating our current point
       *        in the animation where 0 represents the start and 1.0 represents
       *        the end
       * @return The interpolation value. This value can be more than 1.0 for
       *         interpolators which overshoot their targets, or less than 0 for
       *         interpolators that undershoot their targets.
       */
      float getInterpolation(float input);
  }
  