Physics Engine

Is there a good tutorial/walkthrough/pdf explaining how to write your own? (preferred C++)

i want to start developing a game engine and thought i have a shitty render engine and i'd start the physics one to test stuff out..

opinions?

Opinions? Use a pre-existing one. It is better than yours.

If you want to make one of your own: Check out some other peoples source code for engines and see how they did it. Then make your own. (ie, see how the implementations of certain things can be done)

If you intend to use it for games: Get someone elses open engine and use that. It's likely better than yours.

Read SICM.