I have some rigged models of enemies for my rpg, and after i give the player character some weapons, I want to set up a battle system. I want it to work somewhat similar to Dot Hack (Infection through Quarantine), or even like runescape. How do I make an enemy AI that runs towards the player and avoids obstacles, respawn after death, and regain health? Also, how do I make a battle system where the weapons and armor affect the amount of damage dealed to either side?
seems you are looking for an algorithm and this kind of things believe me are very difficult. First one algorithm I recommend you that I usually use is the Greedy's algorithm an to understand it better here is an example of this algorithm: http://www.openprocessing.org/visuals/?visualID=6716 another good example of algorithm there is path finding algorithm here is an example: http://www.policyalmanac.org/games/aStarTutorial.htm, http://en.wikipedia.org/wiki/Pathfinding and if you have weakness to do all of this and you simply want something fast I recommend you the A* pathfinding and there are more examples you can see in this question http://answers.unity3d.com/questions/35421/online-advanced-aiartificial-intelligence-with-js, http://www.youtube.com/watch?v=xogj5Vw1K7E&feature=relmfu and for final there is the Dijkstra algorithm, so again doing this is very difficult but is the best way you have to get what you want
OK I give you some examples of algorithms but maybe you don't want algorithms for what your doing so there is something more simple but you cab get a lot of troubles to do this: http://www.youtube.com/watch?v=9iOfYdaaeB8&feature=relmfu
then for health and amount damage I recommend you to see all the videos but these are the videos of health and all that stuff: http://www.youtube.com/watch?v=MgRIwJrwwhE&feature=related, http://www.youtube.com/watch?v=kx31sZr_RJs, http://www.youtube.com/watch?v=xB8wEDeAQk0&feature=related, and there are more interesting things you can see if you see more videos, so hope it helps :)