public static Func <float, float, float, Quaternion> GetEulerToRotation(this BvhNode bvh)
{
var order = bvh.Channels.Where(x => x == Channel.Xrotation || x == Channel.Yrotation || x == Channel.Zrotation).ToArray();
return((x, y, z) =>
{
var xRot = Quaternion.CreateFromYawPitchRoll(x, 0, 0);
var yRot = Quaternion.CreateFromYawPitchRoll(0, y, 0);
var zRot = Quaternion.CreateFromYawPitchRoll(0, 0, z);
var r = Quaternion.Identity;
foreach (var ch in order)
{
switch (ch)
{
case Channel.Xrotation: r = r * xRot; break;
case Channel.Yrotation: r = r * yRot; break;
case Channel.Zrotation: r = r * zRot; break;
default: throw new BvhException("no rotation");
}
}
return r;
});
}
BvhNode GetParent(BvhNode node)
{
foreach (var x in Root.Traverse())
{
if (x.Children.Contains(node))
{
return(x);
}
}
return(null);
}
public Bvh(BvhNode root, int frames, float seconds)
{
Root = root;
FrameTime = TimeSpan.FromSeconds(seconds);
m_frames = frames;
var channelCount = Root.Traverse()
.Where(x => x.Channels != null)
.Select(x => x.Channels.Length)
.Sum();
Channels = Enumerable.Range(0, channelCount)
.Select(x => new ChannelCurve(frames))
.ToArray()
;
}
public ChannelCurve GetChannel(BvhNode target, Channel channel)
{
var index = 0;
foreach (var node in Root.Traverse())
{
for (int i = 0; i < node.Channels.Length; ++i, ++index)
{
if (node == target && node.Channels[i] == channel)
{
return(Channels[index]);
}
}
}
throw new BvhException("channel is not found");
}
public string GetPath(BvhNode node)
{
var list = new List <string>()
{
node.Name
};
var current = node;
while (current != null)
{
current = GetParent(current);
if (current != null)
{
list.Insert(0, current.Name);
}
}
return(String.Join("/", list.ToArray()));
}
public CurveSet(BvhNode node)
{
Node = node;
}
public void AddChid(BvhNode child)
{
child.Parent = this;
m_children.Add(child);
}
static BvhNode ParseNode(StringReader r, int level = 0)
{
var firstline = r.ReadLine().Trim();
var splitted = firstline.Split();
if (splitted.Length != 2)
{
if (splitted.Length == 1)
{
if (splitted[0] == "}")
{
return(null);
}
}
throw new BvhException(String.Format("splitted to {0}({1})", splitted.Length, firstline));
}
BvhNode node = null;
if (splitted[0] == "ROOT")
{
if (level != 0)
{
throw new BvhException("nested ROOT");
}
node = new BvhNode(splitted[1]);
}
else if (splitted[0] == "JOINT")
{
if (level == 0)
{
throw new BvhException("should ROOT, but JOINT");
}
node = new BvhNode(splitted[1]);
}
else if (splitted[0] == "End")
{
if (level == 0)
{
throw new BvhException("End in level 0");
}
node = new EndSite();
}
else
{
throw new BvhException("unknown type: " + splitted[0]);
}
if (r.ReadLine().Trim() != "{")
{
throw new BvhException("'{' is not found");
}
node.Parse(r);
// child nodes
while (true)
{
var child = ParseNode(r, level + 1);
if (child == null)
{
break;
}
if (!(child is EndSite))
{
node.AddChid(child);
}
}
return(node);
}
