private bool ReadCanonicalForm(Transform3D transform, bool useIfChangeable)
{
if (!CanonicalTransform3D.IsCanonical(transform))
{
return(false);
}
Transform3DGroup transform3Dgroup = (Transform3DGroup)transform;
ScaleTransform3D scaleTransform3D = transform3Dgroup.Children[1] as ScaleTransform3D;
RotateTransform3D rotateTransform3D = transform3Dgroup.Children[2] as RotateTransform3D;
TranslateTransform3D translateTransform3D1 = transform3Dgroup.Children[3] as TranslateTransform3D;
TranslateTransform3D translateTransform3D2 = transform3Dgroup.Children[4] as TranslateTransform3D;
this.center = new Point3D(translateTransform3D1.OffsetX, translateTransform3D1.OffsetY, translateTransform3D1.OffsetZ);
this.scale = new Vector3D(scaleTransform3D.ScaleX, scaleTransform3D.ScaleY, scaleTransform3D.ScaleZ);
this.translation = new Vector3D(translateTransform3D2.OffsetX, translateTransform3D2.OffsetY, translateTransform3D2.OffsetZ);
if (useIfChangeable && !transform3Dgroup.IsFrozen)
{
this.transformGroup = transform3Dgroup;
}
else
{
this.InitializeTransformGroup();
Vector3D? nullable = (Vector3D?)rotateTransform3D.GetValue(CanonicalTransform3D.EulerAnglesProperty);
bool flag = nullable.HasValue;
AxisAngleRotation3D axisAngleRotation3D = rotateTransform3D.Rotation as AxisAngleRotation3D;
Quaternion orientation = Quaternion.Identity;
if (axisAngleRotation3D != null)
{
orientation = new Quaternion(axisAngleRotation3D.Axis, axisAngleRotation3D.Angle);
}
if (flag)
{
Quaternion quaternion = Helper3D.QuaternionFromEulerAngles(nullable.Value);
if (!Tolerances.AreClose(quaternion.Angle, orientation.Angle) || !Tolerances.AreClose(quaternion.Axis, orientation.Axis))
{
flag = false;
}
}
if (!flag)
{
nullable = new Vector3D?(Helper3D.EulerAnglesFromQuaternion(orientation));
}
this.RotationAngles = nullable.Value;
}
return(true);
}