public static Matrix GlobalTransformMatrix(this SkeletonFile.SkeletonBone skeletonBone)
{
if (skeletonBone == null)
{
return(Matrix.Identity);
}
return(LocalTransformMatrix(skeletonBone) * GlobalTransformMatrix(skeletonBone.Parent));
}
public static Vector3 Position(this SkeletonFile.SkeletonBone skeletonBone, bool flipZ = false)
{
var transformMatrix = GlobalTransformMatrix(skeletonBone);
var result = Vector3.Transform(Vector3.Zero, transformMatrix);
if (flipZ)
{
result.Z = -result.Z;
}
return(result);
}
public static Matrix LocalTransformMatrix(this SkeletonFile.SkeletonBone skeletonBone)
{
if (skeletonBone == null)
{
return(Matrix.Identity);
}
var matrixPreRotation = Matrix.CreateFromQuaternion(skeletonBone.PreRotation);
var matrixPostRotation = Matrix.CreateFromQuaternion(skeletonBone.PostRotation);
var matrixOffset = Matrix.CreateTranslation(skeletonBone.Offset);
var result = matrixPreRotation * matrixPostRotation * matrixOffset;
return(result);
}
public static void ToString(this SkeletonFile.SkeletonBone skeletonBone, TextWriter writer, bool flipZ = false)
{
writer.WriteLine(@" Name={0},
ParentIndex= {1},
PreRotation= {2},
PostRotation={3},
Offset= {4},
Position= {5}",
skeletonBone.Name,
skeletonBone.ParentIndex,
skeletonBone.PreRotation.ToFormatString(),
skeletonBone.PostRotation.ToFormatString(),
skeletonBone.Offset.ToFormatString(),
skeletonBone.Position(flipZ).ToFormatString());
}
