Durability-Based Textures for Modded Items

For extra clarification, a sword looking more broken as it goes down in durability is what I'm trying to achieve. 
I have learned how to do it for vanilla textures but I'm struggling with doing the same for modded weapons/tools. The mod I'm currently trying to work with is SpartanWeaponry but I want to learn how to do it with other mods as well in the future.