internal ModelBoneContent(string name, int index, Matrix transform, ModelBoneContent parent)
{
_name = name;
_index = index;
_transform = transform;
_parent = parent;
}
internal ModelBoneContent(string name, int index, Matrix transform, ModelBoneContent parent)
{
_name = name;
_index = index;
_transform = transform;
_parent = parent;
}
static void Transform(ref BoundingBox bbx, ModelBoneContent bone)
{
bbx.GetCorners(corners);
Matrix m = WorldTransform(bone);
Vector3.Transform(corners, ref m, corners);
bbx = BoundingBox.CreateFromPoints(corners);
}
static Matrix WorldTransform(ModelBoneContent bone)
{
Matrix m = bone.Transform;
while (bone.Parent != null && bone.Parent != bone)
{
bone = bone.Parent;
m = m * WorldTransform(bone);
}
return(m);
}
private void CalculateAbsoluteTransforms(ModelBoneContent bone, Matrix[] transforms)
{
if (bone.Parent == null)
{
transforms[bone.Index] = bone.Transform;
}
else
{
transforms[bone.Index] = bone.Transform * transforms[bone.Parent.Index];
}
foreach (ModelBoneContent child in bone.Children)
{
CalculateAbsoluteTransforms(child, transforms);
}
}
protected virtual string GetBoneName(ModelBoneContent mbc)
{
if (mbc.Name != null)
{
return(mbc.Name);
}
string ret;
if (!boneNames_.TryGetValue(mbc, out ret))
{
ret = String.Format("_GenBone{0}", ++nBonesGenerated_);
boneNames_.Add(mbc, ret);
}
return(ret);
}
// The BoneReference type varies in size depending on the number of bones in the model.
// If bone count is less than 255 this value is serialized as a Byte, otherwise it is UInt32.
// If the reference value is zero the bone is null, otherwise (bone reference - 1) is an index into the model bone list.
private void WriteBoneReference(ContentWriter output, int bonesCount, ModelBoneContent bone)
{
if (bone == null)
{
output.Write((byte)0);
}
else if (bonesCount < 255)
{
output.Write((byte)(bone.Index + 1));
}
else
{
output.Write((UInt32)(bone.Index + 1));
}
}
private void WriteBoneReference(ContentWriter output, ModelBoneContent bone, ModelBoneContentCollection bones)
{
var boneCount = bones != null ? bones.Count : 0;
var boneId = bone != null
? bone.Index + 1
: 0;
if (boneCount < 255)
{
output.Write((byte)boneId);
}
else
{
output.Write((uint)boneId);
}
}
