bool IsEstimatedLocalTranslation()
{
BvhBone hip = null;
foreach (var bone in bones)
{
if (bone.isHipBone)
{
hip = bone;
}
}
if (hip == null)
{
return(true); // best estimate without a hip bone
}
var index = hip.frameOffset + 1;
// Use hip 'y' to estimate the translation mode (local or "absolute")
float sum = 0;
for (var i = 0; i < nFrames; i++)
{
var data = frames[i];
sum += data[index];
}
float average = sum / nFrames;
float absScore = Mathf.Abs(hip.offset.y - average); // absolute will have average close to offset
float locScore = Mathf.Abs(average); // lowest score wins
return(locScore < absScore);
}
BvhBone[] ReadHierarchy(string[] lines)
{
char[] delims = { ' ', '\t' };
var boneList = new List <BvhBone>();
BvhBone current = null;
int frameOffset = 0;
for (var i = 0; i < lines.Length; i++)
{
if (lines[i] == "MOTION")
{
break;
}
var parts = lines[i].Split(delims, System.StringSplitOptions.RemoveEmptyEntries);
if (parts.Length >= 2 && (parts[0] == "JOINT" || parts[0] == "ROOT"))
{
current = new BvhBone();
current.name = parts[1];
current.offset = Vector3.zero;
current.frameOffset = frameOffset;
if (current.name == "hip")
{
current.isHipBone = true;
}
boneList.Add(current);
}
if (parts.Length >= 4 && parts[0] == "OFFSET" && current != null)
{
current.offset = new Vector3(-float.Parse(parts[1]), float.Parse(parts[2]), float.Parse(parts[3])) * 0.01f;
}
if (parts.Length >= 2 && parts[0] == "CHANNELS" && current != null)
{
var nChannels = int.Parse(parts[1]);
frameOffset += nChannels;
// XXX: examples may exist that are not covered here (but I think they're rare) -- Found some!
// We now support 6 channels with X,Y,Zpos in first 3 and any rotation order
// Or 3 channels with any rotation order
if (nChannels == 3)
{
current.hasPosition = false;
current.hasRotation = true;
current.rotationOrder = GetRotationOrder(parts[2], parts[3], parts[4]);
}
else if (nChannels == 6)
{
current.hasPosition = true;
current.hasRotation = true;
current.rotationOrder = GetRotationOrder(parts[5], parts[6], parts[7]);
}
else
{
SuperController.LogError(string.Format("Unexpect number of channels in BVH Hierarchy {1} {0}", nChannels, current.name));
}
}
if (parts.Length >= 2 && parts[0] == "End" && parts[1] == "Site")
{
current = null;
}
}
return(boneList.ToArray());
}
