# Learning PhysX
Yesterday I've started learning NVIDIA PhysX. It's the first time I use a physics engine at home, but it seems quite easy for me. I like the PhysX library as it has pretty, object-oriented API.
Is using a physics engine really an advanced topic? Now I don't think so. Sure there are some scary looking terms like "inertia tensor" or "angular damping", but all you need for the start is to know a bit about vectors, matrices, quaternions and some school-level physics like the concept of mass, velocity and force.
PhysX is very powerful. It can simulate soft bodies, cloth, force fields, fluids and much more. But the foundation is just rigid body physics plus character controller. In fact it is so simple and powerful at the same time that I now think every beginner game programmer should learn this. Physics in games is not only to simulate boxes and ragdolls of killed enemies. Using such physics engine is many times easier than implementing algorithms for normal collision detection, sliding along walls, walking on the height field, checking if an object entered a trigger or casting rays. PhysX offers it all!
So how to start learning PhysX if you are interested in this subject? All you need to do is to go to the NVIDIA PhysX website, download and install the PhysX SDK. It includes all necessary files like headers, libraries, DLL-s, documentation and tutorials. I learn from the included tutorials in DOC format which can be found in the TrainingPrograms\Docs\ subdirectory.
Here is a small screenshots from my today experiments: