/// <summary>
/// Reads animation information from the file.
/// </summary>
protected void ReadAnimation(BinaryMemoryReader reader)
{
// name of the animation
string name = ReadString(reader);
// length in seconds of the animation
float length = ReadFloat(reader);
// create an animation from the skeleton
Animation anim = skeleton.CreateAnimation(name, length);
// keep reading all keyframes for this track
if (!IsEOF(reader))
{
SkeletonChunkID chunkID = ReadChunk(reader);
while (!IsEOF(reader) && (chunkID == SkeletonChunkID.AnimationTrack))
{
// read the animation track
ReadAnimationTrack(reader, anim);
// read the next chunk id
// If we're not end of file get the next chunk ID
if (!IsEOF(reader))
{
chunkID = ReadChunk(reader);
}
}
// backpedal to the start of the chunk
if (!IsEOF(reader))
{
Seek(reader, -ChunkOverheadSize);
}
}
}
/// <summary>
/// Reads an animation track.
/// </summary>
protected void ReadAnimationTrack(BinaryMemoryReader reader, Animation anim)
{
// read the bone handle to apply this track to
ushort boneHandle = ReadUShort(reader);
// get a reference to the target bone
Bone targetBone = skeleton.GetBone(boneHandle);
// create an animation track for this bone
NodeAnimationTrack track = anim.CreateNodeTrack(boneHandle, targetBone);
// keep reading all keyframes for this track
if (!IsEOF(reader))
{
SkeletonChunkID chunkID = ReadChunk(reader);
while (!IsEOF(reader) && (chunkID == SkeletonChunkID.KeyFrame))
{
// read the key frame
ReadKeyFrame(reader, track);
// read the next chunk id
// If we're not end of file get the next chunk ID
if (!IsEOF(reader))
{
chunkID = ReadChunk(reader);
}
}
// backpedal to the start of the chunk
if (!IsEOF(reader))
{
Seek(reader, -ChunkOverheadSize);
}
}
}
public void ImportSkeleton(Stream stream, Skeleton skeleton)
{
// store a local reference to the mesh for modification
this.skeleton = skeleton;
var reader = new BinaryReader(stream, System.Text.Encoding.UTF8);
// start off by taking a look at the header
ReadFileHeader(reader);
SkeletonChunkID chunkID = 0;
while (!IsEOF(reader))
{
chunkID = ReadChunk(reader);
switch (chunkID)
{
case SkeletonChunkID.Bone:
ReadBone(reader);
break;
case SkeletonChunkID.BoneParent:
ReadBoneParent(reader);
break;
case SkeletonChunkID.Animation:
ReadAnimation(reader);
break;
case SkeletonChunkID.AttachmentPoint:
ReadAttachmentPoint(reader);
break;
default:
LogManager.Instance.Write(
"Can only parse bones, parents, and animations at the top level during skeleton loading.");
LogManager.Instance.Write("Unexpected chunk: " + chunkID.ToString());
break;
} // switch
} // while
// assume bones are stored in binding pose
skeleton.SetBindingPose();
}
/// <summary>
/// Writes a chunk ID and chunk size. This would be more accurately named
/// WriteChunkHeader, but this name is the counter of ReadChunk.
/// </summary>
protected void WriteChunk(BinaryWriter writer, SkeletonChunkID id, int chunkLength)
{
writer.Write((short)id);
writer.Write(chunkLength);
}
/// <summary>
/// Writes a chunk ID and chunk size. This would be more accurately named
/// WriteChunkHeader, but this name is the counter of ReadChunk.
/// </summary>
protected void WriteChunk(BinaryWriter writer, SkeletonChunkID id, int chunkLength)
{
writer.Write((short)id);
writer.Write(chunkLength);
}
