| collada.util.toUnitVec | Converts the given vector to a unit vector |
| collada.util.checkSource | Check if a source objects complies with the needed components and has the needed length |
| collada.util.normalize_v3 | Normalize a numpy array of 3 component vectors with shape (N,3) |
| collada.util.IndexedList | Class that combines a list and a dict into a single class |