private AnimationClip SubtractAnimations(AnimationClip baseAnimation, AnimationClip sourceAnimation)
{
if (baseAnimation == null)
{
throw new ArgumentNullException("baseAnimation");
}
if (sourceAnimation == null)
{
throw new ArgumentNullException("sourceAnimation");
}
var animationBlender = new AnimationBlender();
var baseEvaluator = animationBlender.CreateEvaluator(baseAnimation);
var sourceEvaluator = animationBlender.CreateEvaluator(sourceAnimation);
// Create a result animation with same channels
var resultAnimation = new AnimationClip();
foreach (var channel in sourceAnimation.Channels)
{
// Create new instance of curve
var newCurve = (AnimationCurve)Activator.CreateInstance(typeof(AnimationCurve <>).MakeGenericType(channel.Value.ElementType));
// Quaternion curve are linear, others are cubic
if (newCurve.ElementType != typeof(Quaternion))
{
newCurve.InterpolationType = AnimationCurveInterpolationType.Cubic;
}
resultAnimation.AddCurve(channel.Key, newCurve);
}
var resultEvaluator = animationBlender.CreateEvaluator(resultAnimation);
var animationOperations = new FastList <AnimationOperation>();
// Perform animation blending for each frame and upload results in a new animation
// Note that it does a simple per-frame sampling, so animation discontinuities will be lost.
// TODO: Framerate is hardcoded at 30 FPS.
var frameTime = TimeSpan.FromSeconds(1.0f / 30.0f);
for (var time = TimeSpan.Zero; time < sourceAnimation.Duration + frameTime; time += frameTime)
{
// Last frame, round it to end of animation
if (time > sourceAnimation.Duration)
{
time = sourceAnimation.Duration;
}
TimeSpan baseTime;
switch (Parameters.Mode)
{
case AdditiveAnimationBaseMode.FirstFrame:
baseTime = TimeSpan.Zero;
break;
case AdditiveAnimationBaseMode.Animation:
baseTime = TimeSpan.FromTicks(time.Ticks % baseAnimation.Duration.Ticks);
break;
default:
throw new ArgumentOutOfRangeException();
}
// Generates result = source - base
animationOperations.Clear();
animationOperations.Add(AnimationOperation.NewPush(sourceEvaluator, time));
animationOperations.Add(AnimationOperation.NewPush(baseEvaluator, baseTime));
animationOperations.Add(AnimationOperation.NewBlend(CoreAnimationOperation.Subtract, 1.0f));
animationOperations.Add(AnimationOperation.NewPop(resultEvaluator, time));
// Compute
AnimationClipResult animationClipResult = null;
animationBlender.Compute(animationOperations, ref animationClipResult);
}
resultAnimation.Duration = sourceAnimation.Duration;
resultAnimation.RepeatMode = sourceAnimation.RepeatMode;
return(resultAnimation);
}
private unsafe object ExportAnimation(ICommandContext commandContext, ContentManager contentManager, bool failOnEmptyAnimation)
{
// Read from model file
var modelSkeleton = LoadSkeleton(commandContext, contentManager); // we get model skeleton to compare it to real skeleton we need to map to
AdjustSkeleton(modelSkeleton);
TimeSpan duration;
var animationClips = LoadAnimation(commandContext, contentManager, out duration);
// Fix the animation frames
double startFrameSeconds = StartFrame.TotalSeconds;
double endFrameSeconds = EndFrame.TotalSeconds;
var startTime = CompressedTimeSpan.FromSeconds(-startFrameSeconds);
foreach (var clip in animationClips)
{
foreach (var animationCurve in clip.Value.Curves)
{
animationCurve.ShiftKeys(startTime);
}
}
var durationTimeSpan = TimeSpan.FromSeconds((endFrameSeconds - startFrameSeconds));
if (duration > durationTimeSpan)
{
duration = durationTimeSpan;
}
var animationClip = new AnimationClip {
Duration = duration
};
if (animationClips.Count > 0)
{
AnimationClip rootMotionAnimationClip = null;
// If root motion is explicitely enabled, or if there is no skeleton, try to find root node and apply animation directly on TransformComponent
if ((AnimationRootMotion || SkeletonUrl == null) && modelSkeleton.Nodes.Length >= 1)
{
// No skeleton, map root node only
// TODO: For now, it seems to be located on node 1 in FBX files. Need to check if always the case, and what happens with Assimp
var rootNode0 = modelSkeleton.Nodes.Length >= 1 ? modelSkeleton.Nodes[0].Name : null;
var rootNode1 = modelSkeleton.Nodes.Length >= 2 ? modelSkeleton.Nodes[1].Name : null;
if ((rootNode0 != null && animationClips.TryGetValue(rootNode0, out rootMotionAnimationClip)) ||
(rootNode1 != null && animationClips.TryGetValue(rootNode1, out rootMotionAnimationClip)))
{
foreach (var channel in rootMotionAnimationClip.Channels)
{
var curve = rootMotionAnimationClip.Curves[channel.Value.CurveIndex];
// Root motion
var channelName = channel.Key;
if (channelName.StartsWith("Transform."))
{
animationClip.AddCurve($"[TransformComponent.Key]." + channelName.Replace("Transform.", string.Empty), curve);
}
// Also apply Camera curves
// TODO: Add some other curves?
if (channelName.StartsWith("Camera."))
{
animationClip.AddCurve($"[CameraComponent.Key]." + channelName.Replace("Camera.", string.Empty), curve);
}
}
}
}
// Load asset reference skeleton
if (SkeletonUrl != null)
{
var skeleton = contentManager.Load <Skeleton>(SkeletonUrl);
var skeletonMapping = new SkeletonMapping(skeleton, modelSkeleton);
// Process missing nodes
foreach (var nodeAnimationClipEntry in animationClips)
{
var nodeName = nodeAnimationClipEntry.Key;
var nodeAnimationClip = nodeAnimationClipEntry.Value;
var nodeIndex = modelSkeleton.Nodes.IndexOf(x => x.Name == nodeName);
// Node doesn't exist in skeleton? skip it
if (nodeIndex == -1 || skeletonMapping.SourceToSource[nodeIndex] != nodeIndex)
{
continue;
}
// Skip root motion node (if any)
if (nodeAnimationClip == rootMotionAnimationClip)
{
continue;
}
// Find parent node
var parentNodeIndex = modelSkeleton.Nodes[nodeIndex].ParentIndex;
if (parentNodeIndex != -1 && skeletonMapping.SourceToSource[parentNodeIndex] != parentNodeIndex)
{
// Some nodes were removed, we need to concat the anim curves
var currentNodeIndex = nodeIndex;
var nodesToMerge = new List <Tuple <ModelNodeDefinition, AnimationBlender, AnimationClipEvaluator> >();
while (currentNodeIndex != -1 && currentNodeIndex != skeletonMapping.SourceToSource[parentNodeIndex])
{
AnimationClip animationClipToMerge;
AnimationClipEvaluator animationClipEvaluator = null;
AnimationBlender animationBlender = null;
if (animationClips.TryGetValue(modelSkeleton.Nodes[currentNodeIndex].Name, out animationClipToMerge))
{
animationBlender = new AnimationBlender();
animationClipEvaluator = animationBlender.CreateEvaluator(animationClipToMerge);
}
nodesToMerge.Add(Tuple.Create(modelSkeleton.Nodes[currentNodeIndex], animationBlender, animationClipEvaluator));
currentNodeIndex = modelSkeleton.Nodes[currentNodeIndex].ParentIndex;
}
// Put them in proper parent to children order
nodesToMerge.Reverse();
// Find all key times
// TODO: We should detect discontinuities and keep them
var animationKeysSet = new HashSet <CompressedTimeSpan>();
foreach (var node in nodesToMerge)
{
if (node.Item3 != null)
{
foreach (var curve in node.Item3.Clip.Curves)
{
foreach (CompressedTimeSpan time in curve.Keys)
{
animationKeysSet.Add(time);
}
}
}
}
// Sort key times
var animationKeys = animationKeysSet.ToList();
animationKeys.Sort();
var animationOperations = new FastList <AnimationOperation>();
var combinedAnimationClip = new AnimationClip();
var translationCurve = new AnimationCurve <Vector3>();
var rotationCurve = new AnimationCurve <Quaternion>();
var scaleCurve = new AnimationCurve <Vector3>();
// Evaluate at every key frame
foreach (var animationKey in animationKeys)
{
var matrix = Matrix.Identity;
// Evaluate node
foreach (var node in nodesToMerge)
{
// Needs to be an array in order for it to be modified by the UpdateEngine, otherwise it would get passed by value
var modelNodeDefinitions = new ModelNodeDefinition[1] {
node.Item1
};
if (node.Item2 != null && node.Item3 != null)
{
// Compute
AnimationClipResult animationClipResult = null;
animationOperations.Clear();
animationOperations.Add(AnimationOperation.NewPush(node.Item3, animationKey));
node.Item2.Compute(animationOperations, ref animationClipResult);
var updateMemberInfos = new List <UpdateMemberInfo>();
foreach (var channel in animationClipResult.Channels)
{
if (channel.IsUserCustomProperty)
{
continue;
}
updateMemberInfos.Add(new UpdateMemberInfo {
Name = "[0]." + channel.PropertyName, DataOffset = channel.Offset
});
}
// TODO: Cache this
var compiledUpdate = UpdateEngine.Compile(typeof(ModelNodeDefinition[]), updateMemberInfos);
fixed(byte *data = animationClipResult.Data)
{
UpdateEngine.Run(modelNodeDefinitions, compiledUpdate, (IntPtr)data, null);
}
}
Matrix localMatrix;
var transformTRS = modelNodeDefinitions[0].Transform;
Matrix.Transformation(ref transformTRS.Scale, ref transformTRS.Rotation, ref transformTRS.Position,
out localMatrix);
matrix = Matrix.Multiply(localMatrix, matrix);
}
// Done evaluating, let's decompose matrix
TransformTRS transform;
matrix.Decompose(out transform.Scale, out transform.Rotation, out transform.Position);
// Create a key
translationCurve.KeyFrames.Add(new KeyFrameData <Vector3>(animationKey, transform.Position));
rotationCurve.KeyFrames.Add(new KeyFrameData <Quaternion>(animationKey, transform.Rotation));
scaleCurve.KeyFrames.Add(new KeyFrameData <Vector3>(animationKey, transform.Scale));
}
combinedAnimationClip.AddCurve($"{nameof(ModelNodeTransformation.Transform)}.{nameof(TransformTRS.Position)}", translationCurve);
combinedAnimationClip.AddCurve($"{nameof(ModelNodeTransformation.Transform)}.{nameof(TransformTRS.Rotation)}", rotationCurve);
combinedAnimationClip.AddCurve($"{nameof(ModelNodeTransformation.Transform)}.{nameof(TransformTRS.Scale)}", scaleCurve);
nodeAnimationClip = combinedAnimationClip;
}
var transformStart = $"{nameof(ModelNodeTransformation.Transform)}.";
var transformPosition = $"{nameof(ModelNodeTransformation.Transform)}.{nameof(TransformTRS.Position)}";
foreach (var channel in nodeAnimationClip.Channels)
{
var curve = nodeAnimationClip.Curves[channel.Value.CurveIndex];
// TODO: Root motion
var channelName = channel.Key;
if (channelName.StartsWith(transformStart))
{
if (channelName == transformPosition)
{
// Translate node with parent 0 using PivotPosition
var keyFrames = ((AnimationCurve <Vector3>)curve).KeyFrames;
for (int i = 0; i < keyFrames.Count; ++i)
{
if (parentNodeIndex == 0)
{
keyFrames.Items[i].Value -= PivotPosition;
}
keyFrames.Items[i].Value *= ScaleImport;
}
}
animationClip.AddCurve($"[ModelComponent.Key].Skeleton.NodeTransformations[{skeletonMapping.SourceToTarget[nodeIndex]}]." + channelName, curve);
}
}
}
}
if (ImportCustomAttributes)
{
// Add clips clips animating other properties than node transformations
foreach (var nodeAnimationClipPair in animationClips)
{
var nodeName = nodeAnimationClipPair.Key;
var nodeAnimationClip = nodeAnimationClipPair.Value;
foreach (var channel in nodeAnimationClip.Channels)
{
var channelName = channel.Key;
var channelValue = channel.Value;
if (channelValue.IsUserCustomProperty)
{
animationClip.AddCurve(nodeName + "_" + channelName, nodeAnimationClip.Curves[channel.Value.CurveIndex], true);
}
}
}
}
}
if (animationClip.Channels.Count == 0)
{
var logString = $"File {SourcePath} doesn't have any animation information.";
if (failOnEmptyAnimation)
{
commandContext.Logger.Error(logString);
return(null);
}
commandContext.Logger.Info(logString);
}
else
{
if (animationClip.Duration.Ticks == 0)
{
commandContext.Logger.Verbose($"File {SourcePath} has a 0 tick long animation.");
}
// Optimize and set common parameters
animationClip.RepeatMode = AnimationRepeatMode;
animationClip.Optimize();
}
return(animationClip);
}
private unsafe object ExportAnimation(ICommandContext commandContext, ContentManager contentManager)
{
// Read from model file
var modelSkeleton = LoadSkeleton(commandContext, contentManager); // we get model skeleton to compare it to real skeleton we need to map to
var animationClips = LoadAnimation(commandContext, contentManager);
AnimationClip animationClip = null;
if (animationClips.Count > 0)
{
animationClip = new AnimationClip();
AnimationClip rootMotionAnimationClip = null;
// If root motion is explicitely enabled, or if there is no skeleton, try to find root node and apply animation directly on TransformComponent
if ((AnimationRootMotion || SkeletonUrl == null) && modelSkeleton.Nodes.Length >= 1)
{
// No skeleton, map root node only
// TODO: For now, it seems to be located on node 1 in FBX files. Need to check if always the case, and what happens with Assimp
var rootNode0 = modelSkeleton.Nodes.Length >= 1 ? modelSkeleton.Nodes[0].Name : null;
var rootNode1 = modelSkeleton.Nodes.Length >= 2 ? modelSkeleton.Nodes[1].Name : null;
if ((rootNode0 != null && animationClips.TryGetValue(rootNode0, out rootMotionAnimationClip)) ||
(rootNode1 != null && animationClips.TryGetValue(rootNode1, out rootMotionAnimationClip)))
{
foreach (var channel in rootMotionAnimationClip.Channels)
{
var curve = rootMotionAnimationClip.Curves[channel.Value.CurveIndex];
// Root motion
var channelName = channel.Key;
if (channelName.StartsWith("Transform."))
{
animationClip.AddCurve($"[TransformComponent.Key]." + channelName.Replace("Transform.", string.Empty), curve);
}
// Also apply Camera curves
// TODO: Add some other curves?
if (channelName.StartsWith("Camera."))
{
animationClip.AddCurve($"[CameraComponent.Key]." + channelName.Replace("Camera.", string.Empty), curve);
}
}
// Take max of durations
if (animationClip.Duration < rootMotionAnimationClip.Duration)
{
animationClip.Duration = rootMotionAnimationClip.Duration;
}
}
}
// Load asset reference skeleton
if (SkeletonUrl != null)
{
var skeleton = contentManager.Load <Skeleton>(SkeletonUrl);
var skeletonMapping = new SkeletonMapping(skeleton, modelSkeleton);
// Process missing nodes
foreach (var nodeAnimationClipEntry in animationClips)
{
var nodeName = nodeAnimationClipEntry.Key;
var nodeAnimationClip = nodeAnimationClipEntry.Value;
var nodeIndex = modelSkeleton.Nodes.IndexOf(x => x.Name == nodeName);
// Node doesn't exist in skeleton? skip it
if (nodeIndex == -1 || skeletonMapping.SourceToSource[nodeIndex] != nodeIndex)
{
continue;
}
// Skip root motion node (if any)
if (nodeAnimationClip == rootMotionAnimationClip)
{
continue;
}
// Find parent node
var parentNodeIndex = modelSkeleton.Nodes[nodeIndex].ParentIndex;
if (parentNodeIndex != -1 && skeletonMapping.SourceToSource[parentNodeIndex] != parentNodeIndex)
{
// Some nodes were removed, we need to concat the anim curves
var currentNodeIndex = nodeIndex;
var nodesToMerge = new List <Tuple <ModelNodeDefinition, AnimationBlender, AnimationClipEvaluator> >();
while (currentNodeIndex != -1 && currentNodeIndex != skeletonMapping.SourceToSource[parentNodeIndex])
{
AnimationClip animationClipToMerge;
AnimationClipEvaluator animationClipEvaluator = null;
AnimationBlender animationBlender = null;
if (animationClips.TryGetValue(modelSkeleton.Nodes[currentNodeIndex].Name, out animationClipToMerge))
{
animationBlender = new AnimationBlender();
animationClipEvaluator = animationBlender.CreateEvaluator(animationClipToMerge);
}
nodesToMerge.Add(Tuple.Create(modelSkeleton.Nodes[currentNodeIndex], animationBlender, animationClipEvaluator));
currentNodeIndex = modelSkeleton.Nodes[currentNodeIndex].ParentIndex;
}
// Put them in proper parent to children order
nodesToMerge.Reverse();
// Find all key times
// TODO: We should detect discontinuities and keep them
var animationKeysSet = new HashSet <CompressedTimeSpan>();
foreach (var node in nodesToMerge)
{
foreach (var curve in node.Item3.Clip.Curves)
{
foreach (CompressedTimeSpan time in curve.Keys)
{
animationKeysSet.Add(time);
}
}
}
// Sort key times
var animationKeys = animationKeysSet.ToList();
animationKeys.Sort();
var animationOperations = new FastList <AnimationOperation>();
var combinedAnimationClip = new AnimationClip();
var translationCurve = new AnimationCurve <Vector3>();
var rotationCurve = new AnimationCurve <Quaternion>();
var scaleCurve = new AnimationCurve <Vector3>();
// Evaluate at every key frame
foreach (var animationKey in animationKeys)
{
var matrix = Matrix.Identity;
// Evaluate node
foreach (var node in nodesToMerge)
{
// Get default position
var modelNodeDefinition = node.Item1;
// Compute
AnimationClipResult animationClipResult = null;
animationOperations.Clear();
animationOperations.Add(AnimationOperation.NewPush(node.Item3, animationKey));
node.Item2.Compute(animationOperations, ref animationClipResult);
var updateMemberInfos = new List <UpdateMemberInfo>();
foreach (var channel in animationClipResult.Channels)
{
updateMemberInfos.Add(new UpdateMemberInfo {
Name = channel.PropertyName, DataOffset = channel.Offset
});
}
// TODO: Cache this
var compiledUpdate = UpdateEngine.Compile(typeof(ModelNodeDefinition), updateMemberInfos);
unsafe
{
fixed(byte *data = animationClipResult.Data)
UpdateEngine.Run(modelNodeDefinition, compiledUpdate, (IntPtr)data, null);
}
Matrix localMatrix;
TransformComponent.CreateMatrixTRS(ref modelNodeDefinition.Transform.Position, ref modelNodeDefinition.Transform.Rotation, ref modelNodeDefinition.Transform.Scale,
out localMatrix);
matrix = Matrix.Multiply(localMatrix, matrix);
}
// Done evaluating, let's decompose matrix
TransformTRS transform;
matrix.Decompose(out transform.Scale, out transform.Rotation, out transform.Position);
// Create a key
translationCurve.KeyFrames.Add(new KeyFrameData <Vector3>(animationKey, transform.Position));
rotationCurve.KeyFrames.Add(new KeyFrameData <Quaternion>(animationKey, transform.Rotation));
scaleCurve.KeyFrames.Add(new KeyFrameData <Vector3>(animationKey, transform.Scale));
}
combinedAnimationClip.AddCurve($"{nameof(ModelNodeTransformation.Transform)}.{nameof(TransformTRS.Position)}", translationCurve);
combinedAnimationClip.AddCurve($"{nameof(ModelNodeTransformation.Transform)}.{nameof(TransformTRS.Rotation)}", rotationCurve);
combinedAnimationClip.AddCurve($"{nameof(ModelNodeTransformation.Transform)}.{nameof(TransformTRS.Scale)}", scaleCurve);
nodeAnimationClip = combinedAnimationClip;
}
foreach (var channel in nodeAnimationClip.Channels)
{
var curve = nodeAnimationClip.Curves[channel.Value.CurveIndex];
// TODO: Root motion
var channelName = channel.Key;
if (channelName.StartsWith("Transform."))
{
animationClip.AddCurve($"[ModelComponent.Key].Skeleton.NodeTransformations[{skeletonMapping.SourceToTarget[nodeIndex]}]." + channelName, curve);
}
}
// Take max of durations
if (animationClip.Duration < nodeAnimationClip.Duration)
{
animationClip.Duration = nodeAnimationClip.Duration;
}
}
}
}
if (animationClip == null)
{
commandContext.Logger.Info("File {0} has an empty animation.", SourcePath);
}
else
{
if (animationClip.Duration.Ticks == 0)
{
commandContext.Logger.Warning("File {0} has a 0 tick long animation.", SourcePath);
}
// Optimize and set common parameters
animationClip.RepeatMode = AnimationRepeatMode;
animationClip.Optimize();
}
return(animationClip);
}