public void IsValidTest()
{
var m = Matrix44F.CreateTranslation(1, 2, 3) * Matrix44F.CreateRotationY(0.1f) * Matrix44F.CreateScale(-2, 3, 4);
Assert.IsTrue(SrtTransform.IsValid(m));
// Concatenating to SRTs creates a skew.
m = Matrix44F.CreateRotationZ(0.1f) * Matrix44F.CreateScale(-2, 3, 4) * m;
Assert.IsFalse(SrtTransform.IsValid(m));
}
private void BuildSkeleton()
{
// Get an array of all bones in depth-first order.
// (Same as MeshHelper.FlattenSkeleton(root).)
var bones = TreeHelper.GetSubtree(_rootBone, n => n.Children.OfType <BoneContent>(), true)
.ToList();
// Create list of parent indices, bind pose transformations and bone names.
var boneParents = new List <int>();
var bindTransforms = new List <SrtTransform>();
var boneNames = new List <string>();
int numberOfWarnings = 0;
foreach (var bone in bones)
{
int parentIndex = bones.IndexOf(bone.Parent as BoneContent);
boneParents.Add(parentIndex);
// Log warning for invalid transform matrices - but not too many warnings.
if (numberOfWarnings < 2)
{
if (!SrtTransform.IsValid((Matrix)bone.Transform))
{
if (numberOfWarnings < 1)
{
_context.Logger.LogWarning(null, _input.Identity, "Bone transform is not supported. Bone transform matrices may only contain scaling, rotation and translation.");
}
else
{
_context.Logger.LogWarning(null, _input.Identity, "More unsupported bone transform found.");
}
numberOfWarnings++;
}
}
bindTransforms.Add(SrtTransform.FromMatrix(bone.Transform));
if (boneNames.Contains(bone.Name))
{
string message = String.Format(CultureInfo.InvariantCulture, "Duplicate bone name (\"{0}\") found.", bone.Name);
throw new InvalidContentException(message, _input.Identity);
}
boneNames.Add(bone.Name);
}
// Create and return a new skeleton instance.
_skeleton = new Skeleton(boneParents, boneNames, bindTransforms);
}