/// <summary>
/// Constructor for the animation player. It makes the
/// association between a clip and a model and sets up for playing
/// </summary>
/// <param name="clip"></param>
public AnimationPlayer(AnimationClip clip, AnimatedModel model)
{
this.clip = clip;
this.model = model;
// Create the bone information classes
boneCnt = clip.Bones.Count;
boneInfos = new BoneInfo[boneCnt];
for (int b = 0; b < boneInfos.Length; b++)
{
// Create it
boneInfos[b] = new BoneInfo(clip.Bones[b]);
// Assign it to a model bone
boneInfos[b].SetModel(model);
}
Rewind();
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="bone"></param>
public BoneInfo(AnimationClip.Bone bone)
{
this.ClipBone = bone;
SetKeyframes();
SetPosition(0);
}
/// <summary>
/// Play an animation clip
/// </summary>
/// <param name="clip">The clip to play</param>
/// <returns>The player that will play this clip</returns>
public AnimationPlayer PlayClip(AnimationClip clip)
{
// Create a clip player and assign it to this model
player = new AnimationPlayer(clip, this);
return player;
}
/// <summary>
/// Recursive function that processes the entire scene graph, collecting up
/// all of the animation data.
/// </summary>
private void ProcessAnimationsRecursive(NodeContent input)
{
// Look up the bone for this input channel
int inputBoneIndex;
if (bones.TryGetValue(input.Name, out inputBoneIndex))
{
// Save the transform
boneTransforms[inputBoneIndex] = input.Transform;
}
foreach (KeyValuePair<string, AnimationContent> animation in input.Animations)
{
// Do we have this animation before?
AnimationClip clip;
string clipName = animation.Key;
if (!clips.TryGetValue(clipName, out clip))
{
// Never seen before clip
clip = new AnimationClip();
modelExtra.Clips.Add(clipName,clip);
// Retain by name
clips[clipName] = clip;
clip.Name = clipName;
foreach (ModelBoneContent bone in model.Bones)
{
AnimationClip.Bone clipBone = new AnimationClip.Bone();
clipBone.Name = bone.Name;
clip.Bones.Add(clipBone);
}
}
// Ensure the duration is always set
if (animation.Value.Duration.TotalSeconds > clip.Duration)
clip.Duration = animation.Value.Duration.TotalSeconds;
//
// For each channel, determine the bone and then process all of the
// keyframes for that bone.
//
foreach (KeyValuePair<string, AnimationChannel> channel in animation.Value.Channels)
{
// What is the bone index?
int boneIndex;
if (!bones.TryGetValue(channel.Key, out boneIndex))
continue; // Ignore if not a named bone
// An animation is useless if it is for a bone not assigned to any meshes at all
if (UselessAnimationTest(boneIndex))
continue;
// I'm collecting up in a linked list so we can process the data
// and remove redundant keyframes
LinkedList<AnimationClip.Keyframe> keyframes = new LinkedList<AnimationClip.Keyframe>();
foreach (AnimationKeyframe keyframe in channel.Value)
{
Matrix transform = keyframe.Transform; // Keyframe transformation
AnimationClip.Keyframe newKeyframe = new AnimationClip.Keyframe();
newKeyframe.Time = keyframe.Time.TotalSeconds;
newKeyframe.Transform = transform;
keyframes.AddLast(newKeyframe);
}
// LinearKeyframeReduction(keyframes);
foreach (AnimationClip.Keyframe keyframe in keyframes)
{
clip.Bones[boneIndex].Keyframes.Add(keyframe);
}
}
}
foreach (NodeContent child in input.Children)
{
ProcessAnimationsRecursive(child);
}
}
/// <summary>
/// Entry point for animation processing.
/// </summary>
/// <param name="model"></param>
/// <param name="input"></param>
/// <param name="context"></param>
private void ProcessAnimations(ModelContent model, NodeContent input, ContentProcessorContext context, ContentIdentity sourceIdentity)
{
// First build a lookup table so we can determine the
// index into the list of bones from a bone name.
for (int i = 0; i < model.Bones.Count; i++)
{
bones[model.Bones[i].Name] = i;
}
// For saving the bone transforms
boneTransforms = new Matrix[model.Bones.Count];
//
// Collect up all of the animation data
//
ProcessAnimationsRecursive(input);
// Check to see if there's an animation clip definition
// Here, we're checking for a file with the _Anims suffix.
// So, if your model is named dude.fbx, we'd add dude_Anims.xml in the same folder
// and the pipeline will see the file and use it to override the animations in the
// original model file.
string SourceModelFile = sourceIdentity.SourceFilename;
string SourcePath = Path.GetDirectoryName(SourceModelFile);
string AnimFilename = Path.GetFileNameWithoutExtension(SourceModelFile);
AnimFilename += "_Anims.xml";
string AnimPath = Path.Combine(SourcePath, AnimFilename);
if (File.Exists(AnimPath))
{
// Add the filename as a dependency, so if it changes, the model is rebuilt
context.AddDependency(AnimPath);
// Load the animation definition from the XML file
AnimationDefinition AnimDef = context.BuildAndLoadAsset<XmlImporter, AnimationDefinition>(new ExternalReference<XmlImporter>(AnimPath), null);
if (modelExtra.Clips.Count > 0) //if there are some animations in our model
{
foreach (AnimationDefinition.ClipPart Part in AnimDef.ClipParts)
{
// Grab the main clip that we are using and copy to MainClip
AnimationClip MainClip = new AnimationClip();
float StartTime = GetTimeSpanForFrame(Part.StartFrame, AnimDef.OriginalFrameCount, modelExtra.Clips[AnimDef.OriginalClipName].Duration);
float EndTime = GetTimeSpanForFrame(Part.EndFrame, AnimDef.OriginalFrameCount, modelExtra.Clips[AnimDef.OriginalClipName].Duration);
MainClip.Duration = EndTime-StartTime;
MainClip.Name = modelExtra.Clips[AnimDef.OriginalClipName].Name;
for (int i = 0; i < modelExtra.Clips[AnimDef.OriginalClipName].Bones.Count; i++)
{
AnimationClip.Bone clipBone = new AnimationClip.Bone();
clipBone.Name = modelExtra.Clips[AnimDef.OriginalClipName].Bones[i].Name;
if (modelExtra.Clips[AnimDef.OriginalClipName].Bones[i].Keyframes.Count != 0)
{
for (int j = 0; j < modelExtra.Clips[AnimDef.OriginalClipName].Bones[i].Keyframes.Count; j++)
{
if ((modelExtra.Clips[AnimDef.OriginalClipName].Bones[i].Keyframes[j].Time >= StartTime) && (modelExtra.Clips[AnimDef.OriginalClipName].Bones[i].Keyframes[j].Time <= EndTime))
{
AnimationClip.Keyframe frame = new AnimationClip.Keyframe();
frame.Rotation = modelExtra.Clips[AnimDef.OriginalClipName].Bones[i].Keyframes[j].Rotation;
frame.Time = modelExtra.Clips[AnimDef.OriginalClipName].Bones[i].Keyframes[j].Time - StartTime;
frame.Translation = modelExtra.Clips[AnimDef.OriginalClipName].Bones[i].Keyframes[j].Translation;
clipBone.Keyframes.Add(frame);
}
}
}
MainClip.Bones.Add(clipBone);
}
modelExtra.Clips.Add(Part.ClipName, MainClip);
}
// Process each of our new animation clip parts
//foreach (AnimationDefinition.ClipPart Part in AnimDef.ClipParts)
//{
// // Calculate the frame times
// float StartTime = GetTimeSpanForFrame(Part.StartFrame, AnimDef.OriginalFrameCount, MainClip.Duration);
// float EndTime = GetTimeSpanForFrame(Part.EndFrame, AnimDef.OriginalFrameCount, MainClip.Duration);
// //prepare new animation
// LinkedList<AnimationClip.Keyframe> keyframes = new LinkedList<AnimationClip.Keyframe>();
// AnimationClip.Bone NewBone = new AnimationClip.Bone();
// NewBone.Keyframes = new List<AnimationClip.Keyframe>();
// AnimationClip clip = new AnimationClip();
// modelExtra.Clips.Add(Part.ClipName, clip);
// modelExtra.Clips[Part.ClipName].Duration = (Part.EndFrame - Part.StartFrame + 1) * MainClip.Duration / AnimDef.OriginalFrameCount;
// string clipName = Part.ClipName;
// // Retain by name
// clips[clipName] = clip;
// modelExtra.Clips[Part.ClipName].Name = clipName;
// foreach (AnimationClip.Bone bone in MainClip.Bones)
// {
// if (bone.Keyframes.Count != 0)
// {
// int ilosc = Part.EndFrame - Part.StartFrame + 1;
// NewBone.Keyframes = bone.Keyframes.GetRange(Part.StartFrame, ilosc);
// NewBone.Name = bone.Name;
// modelExtra.Clips[Part.ClipName].Bones.Add(NewBone);
// }
// else
// {
// AnimationClip.Bone clipBone = new AnimationClip.Bone();
// clipBone.Name = bone.Name;
// modelExtra.Clips[Part.ClipName].Bones.Add(clipBone);
// }
// }
//}
}
}
// Ensure there is always a clip, even if none is included in the FBX
// That way we can create poses using FBX files as one-frame
// animation clips
if (modelExtra.Clips.Count == 0)
{
AnimationClip clip = new AnimationClip();
modelExtra.Clips.Add("Take 001",clip);
string clipName = "Take 001";
// Retain by name
clips[clipName] = clip;
clip.Name = clipName;
foreach (ModelBoneContent bone in model.Bones)
{
AnimationClip.Bone clipBone = new AnimationClip.Bone();
clipBone.Name = bone.Name;
clip.Bones.Add(clipBone);
}
}
//Ensure all animations have a first key frame for every bone
foreach (KeyValuePair<string,AnimationClip> clip in modelExtra.Clips)
{
for (int b = 0; b < bones.Count; b++)
{
List<AnimationClip.Keyframe> keyframes = clip.Value.Bones[b].Keyframes;
if (keyframes.Count == 0 || keyframes[0].Time > 0)
{
AnimationClip.Keyframe keyframe = new AnimationClip.Keyframe();
keyframe.Time = 0;
keyframe.Transform = boneTransforms[b];
keyframes.Insert(0, keyframe);
}
}
}
}
/// <summary>
/// Entry point for animation processing.
/// </summary>
/// <param name="model"></param>
/// <param name="input"></param>
/// <param name="context"></param>
private void ProcessAnimations(ModelContent model, NodeContent input, ContentProcessorContext context)
{
// First build a lookup table so we can determine the
// index into the list of bones from a bone name.
for (int i = 0; i < model.Bones.Count; i++)
{
bones[model.Bones[i].Name] = i;
}
// For saving the bone transforms
boneTransforms = new Matrix[model.Bones.Count];
//
// Collect up all of the animation data
//
ProcessAnimationsRecursive(input);
// Ensure there is always a clip, even if none is included in the FBX
// That way we can create poses using FBX files as one-frame
// animation clips
if (modelExtra.Clips.Count == 0)
{
AnimationClip clip = new AnimationClip();
modelExtra.Clips.Add(clip);
string clipName = "Take 001";
// Retain by name
clips[clipName] = clip;
clip.Name = clipName;
foreach (ModelBoneContent bone in model.Bones)
{
AnimationClip.Bone clipBone = new AnimationClip.Bone();
clipBone.Name = bone.Name;
clip.Bones.Add(clipBone);
}
}
// Ensure all animations have a first key frame for every bone
foreach (AnimationClip clip in modelExtra.Clips)
{
for (int b = 0; b < bones.Count; b++)
{
List<AnimationClip.Keyframe> keyframes = clip.Bones[b].Keyframes;
if (keyframes.Count == 0 || keyframes[0].Time > 0)
{
AnimationClip.Keyframe keyframe = new AnimationClip.Keyframe();
keyframe.Time = 0;
keyframe.Transform = boneTransforms[b];
keyframes.Insert(0, keyframe);
}
}
}
}