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Some fixes to AI

The prototype is under a storm of changes lately. Yesterday I spent some time trying to figure out the origin of some bugs in the AI code. Lot of time actually, because I lost one hour looking at the wrong line. But now, after moving some code to the Awake() function, and unifying some initializations that were repeated, I fixed a lot of weird errors I had. Also, I found some logical errors, preventing the NPC from properly getting into weapon's range.

Today I plan to implement separate functions to deal with each combat mode, to unclutter the Combat state. Also, I have to study the new Pluggable AI videos posted in Unity's Youtube channel. Maybe I can get some ideas to implement some way to differentiate the AI for each NPC.

The other bunch of changes deal with the process of building character mesh and equip/unequip items like armors. Currently it is a hughe mess with weird problems like incomplete characters, or complete ones that become incomplete if I close and the open the scene again. Believe me, any Assassins Creed rendering bug is nothing compared to this.
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