} // AddAnimationNodes
#endregion
#region Process Root Animation
/// <summary>
/// Converts an intermediate format content pipeline AnimationContent
/// object to our runtime AnimationClip format.
/// </summary>
internal static RootAnimationClip ProcessRootAnimation(AnimationContent animation, string name)
{
List<RootKeyframe> keyframes = new List<RootKeyframe>();
// The root animation is controlling the root of the bones
AnimationChannel channel = animation.Channels[name];
// Add the transformations on the root of the model
foreach (AnimationKeyframe keyframe in channel)
{
keyframes.Add(new RootKeyframe((float)(keyframe.Time.TotalSeconds), keyframe.Transform));
}
// Sort the merged keyframes by time.
keyframes.Sort(CompareKeyframeTimes);
#region Key Frame Reduction
// We drop key frame data where the bone transformation is equal to the previous key frame.
List<RootKeyframe> keyframesReduced = new List<RootKeyframe>();
keyframesReduced.Add(keyframes[0]);
for (int i = 1; i < keyframes.Count; i++)
{
if (keyframes[i - 1].Transform != keyframes[i].Transform)
{
keyframesReduced.Add(keyframes[i]);
}
}
keyframes = keyframesReduced;
// Sort the merged keyframes by time.
keyframes.Sort(CompareKeyframeTimes);
#endregion
if (keyframes.Count == 0)
throw new InvalidContentException("Animation has no keyframes.");
if (animation.Duration <= TimeSpan.Zero)
throw new InvalidContentException("Animation has a zero duration.");
RootKeyframe[] keyframesArray = new RootKeyframe[keyframes.Count];
for (int i = 0; i < keyframes.Count; i++)
{
keyframesArray[i] = keyframes[i];
}
return new RootAnimationClip((float)(animation.Duration.TotalSeconds), keyframesArray);
} // ProcessRootAnimation
} // Play
/// <summary>
/// Starts playing a clip
/// </summary>
/// <param name="name">Animation name</param>
/// <param name="playbackRate">Speed to playback</param>
/// <param name="duration">Length of time to play in seconds (max is looping, 0 is once)</param>
public void Play(string name, float playbackRate, float duration)
{
if (!rootAnimations.ContainsKey(name))
{
throw new ArgumentException("Root Animation Component: the animation name does not exist.");
}
// Store the clip and reset playing data
currentAnimationClip = rootAnimations[name];
currentKeyFrameIndex = 0;
currentKeyFrame = currentAnimationClip.Keyframes[0];
CurrentTimeValue = 0;
elapsedPlaybackTime = 0;
paused = false;
// Store the data about how we want to playback
this.playbackRate = playbackRate;
this.duration = duration;
previousAnimationTransform = ((GameObject3D)Owner).Transform.LocalMatrix;
} // Play
} // CompareKeyframeTimes
/// <summary>
/// Comparison function for sorting keyframes into ascending time order.
/// </summary>
static int CompareKeyframeTimes(RootKeyframe a, RootKeyframe b)
{
return a.Time.CompareTo(b.Time);
} // CompareKeyframeTimes