} // ProcessRootAnimation
#endregion
#region Process Rigid Animation
/// <summary>
/// Converts an intermediate format content pipeline AnimationContent object to our runtime AnimationClip format.
/// </summary>
static ModelAnimationClip ProcessRigidAnimation(string animationName, Dictionary<string, int> boneMap, NodeContent input, ModelContent model)
{
List<ModelKeyframe> keyframes = new List<ModelKeyframe>();
TimeSpan duration = TimeSpan.Zero;
AddTransformationNodes(animationName, boneMap, input, keyframes, ref duration);
// Sort the merged keyframes by time.
keyframes.Sort(CompareKeyframeTimes);
if (keyframes.Count == 0)
throw new InvalidContentException("Animation has no keyframes.");
if (duration <= TimeSpan.Zero)
throw new InvalidContentException("Animation has a zero duration.");
ModelKeyframe[] keyframesArray = new ModelKeyframe[keyframes.Count];
for (int i = 0; i < keyframes.Count; i++)
{
keyframesArray[i] = keyframes[i];
}
return new ModelAnimationClip((float)(duration.TotalSeconds), keyframesArray);
} // ProcessRigidAnimation
/// <summary>
/// Comparison function for sorting keyframes into ascending time order.
/// </summary>
static int CompareKeyframeTimes(ModelKeyframe a, ModelKeyframe b)
{
return(a.Time.CompareTo(b.Time));
}
} // ProcessAnimations
#endregion
#region Process Animation
/// <summary>
/// Converts an intermediate format content pipeline AnimationContent object to our runtime AnimationClip format.
/// </summary>
static ModelAnimationClip ProcessAnimation(AnimationContent animation, Dictionary <string, int> boneMap)
{
List <ModelKeyframe> keyframes = new List <ModelKeyframe>();
// For each input animation channel.
foreach (KeyValuePair <string, AnimationChannel> channel in animation.Channels)
{
// Look up what bone this channel is controlling.
int boneIndex;
if (!boneMap.TryGetValue(channel.Key, out boneIndex))
{
throw new InvalidContentException(string.Format("Found animation for bone '{0}', which is not part of the skeleton.", channel.Key));
}
// Convert the keyframe data.
foreach (AnimationKeyframe keyframe in channel.Value)
{
keyframes.Add(new ModelKeyframe((ushort)boneIndex, (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 <ModelKeyframe> keyframesReduced = new List <ModelKeyframe>();
for (int i = 0; i < ModelAnimationClip.MaxBones; i++)
{
int currentBone = i;
ModelKeyframe lastKeyFrame = new ModelKeyframe(255, 0, Matrix.Identity);
foreach (ModelKeyframe modelKeyframe in keyframes)
{
if (modelKeyframe.Bone == (ushort)currentBone && (lastKeyFrame.Bone != (ushort)currentBone || lastKeyFrame.Position != modelKeyframe.Position ||
lastKeyFrame.Rotation != modelKeyframe.Rotation || lastKeyFrame.Scale != modelKeyframe.Scale))
{
keyframesReduced.Add(modelKeyframe);
}
lastKeyFrame = modelKeyframe;
}
}
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.");
}
ModelKeyframe[] keyframesArray = new ModelKeyframe[keyframes.Count];
for (int i = 0; i < keyframes.Count; i++)
{
keyframesArray[i] = keyframes[i];
}
return(new ModelAnimationClip((float)(animation.Duration.TotalSeconds), keyframesArray));
} // ProcessAnimation
