text: /*********************************************************************************
   *
   * Inviwo - Interactive Visualization Workshop
   *
   * Copyright (c) 2018-2019 Inviwo Foundation
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of source code must retain the above copyright notice, this
   * list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright notice,
   * this list of conditions and the following disclaimer in the documentation
   * and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
   * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   *********************************************************************************/
  
  #include <modules/animation/datastructures/animationstate.h>
  
  #include <algorithm>
  #include <cmath>
  
  namespace inviwo {
  
  namespace animation {
  
  AnimationPlaySettings::AnimationPlaySettings()
      : mode(PlaybackMode::Once), firstTime(0), lastTime(0), numFrames(2), framesPerSecond(25) {}
  
  Seconds AnimationPlaySettings::getFirstTime() const { return firstTime; }
  
  void AnimationPlaySettings::setFirstTime(const Seconds timeValue) {
      firstTime = timeValue;
      if (firstTime > lastTime) std::swap(firstTime, lastTime);
      setNumFrames(numFrames);
  }
  
  Seconds AnimationPlaySettings::getLastTime() const { return lastTime; }
  
  void AnimationPlaySettings::setLastTime(const Seconds timeValue) {
      lastTime = timeValue;
      if (firstTime > lastTime) std::swap(firstTime, lastTime);
      setNumFrames(numFrames);
  }
  
  int AnimationPlaySettings::getNumFrames() const { return numFrames; }
  
  bool AnimationPlaySettings::setNumFrames(const int desiredFrames) {
      if (desiredFrames < 2) return false;
      numFrames = desiredFrames;
  
      // Adjust fps
      const Seconds timeWindow(lastTime - firstTime);
      framesPerSecond = timeWindow.count() / double(numFrames);
  
      return true;
  }
  
  double AnimationPlaySettings::getFramesPerSecond() const { return framesPerSecond; }
  
  bool AnimationPlaySettings::setFramesPerSecond(const double desiredFPS) {
      if (desiredFPS < 1e-3) return false;
      framesPerSecond = desiredFPS;
  
      // Adjust numFrames
      const Seconds timeWindow(lastTime - firstTime);
      numFrames = static_cast<int>(std::ceil(timeWindow.count() * framesPerSecond));
      if (numFrames < 2) numFrames = 2;  // Only happens for small time windows.
  
      return true;
  }
  
  bool AnimationPlaySettings::operator!=(const AnimationPlaySettings& other) const {
      return (mode != other.mode || firstTime != other.firstTime || lastTime != other.lastTime ||
              numFrames != other.numFrames || framesPerSecond != other.framesPerSecond);
  }
  
  }  // namespace animation
  
  }  // namespace inviwo
  