I wanted to have an AI for the enemies to make combat that much more interesting on top of the sword mechanics. I followed the below playlist create an AI but quickly found out the videos leave out a lot of scripts and lines in shown scripts tat make the rest of the code useless without.
I got very frustrated with this and spent countless hours trying to find any clues in every video, even the ones I wasn’t planning on using in the first place. I spent way too long on this and gave up many times before coming back a few days later to try again. I eventually started making progress and filled in some blanks but theyy wwerentenough to get everything working properly. So, time for the not-so-good-looking option.
The videos show capsule colliders on most of the bones, but I simplified it so there are only two box colliders, left and right, to detect when you hit the enemy. The detection triggers an animation depending on where they got hit. The video version would blend the animations based on how close to the centre of the character the collision occured, whereas my version doesn’t blend at all.
Through a lot of trial and error, I figured out a way to make sure an instantiated prefab could detect a collision on itself and not other copies, and activate animations in it’s version of an animator without triggering those of another copy. I ended up using four scripts for this; one on each collider, and two on the parent gameobject. One script on the parent will look for, detect, and chase the player. The other script on the parent is used for storing variables to be accessed by the scripts on the collider gameobjects. Each collider script will detect when their respective collider has been hit, will play their respective hit animations, and will disable both colliders until they are ready to be hit again. The videos below show player detection, hit reaction, and enemy behaviours.
The white circle and yellow lines are done in an editor script in the editor folder so they won’t be used in a built version. This is useful for when you need to see something in the scene view but not in the built game, such as a detection radius.
Before I actually got this to work, the player detection and enemy behaviour was quite different. One version is the player would always be detected and looked at but would only be chased when within a certain range. The other is the player would only be detected within a certain range, but there was no way to hide whilst in that range and you would always be chased. Below are videos to show these.
As you can see with the first video, for some reason the enemy would lean over as the player gets closer, leading to some interesting results.