What I worked on

This game is still under development but I want to share the progress I can show and have done. None of the videos or images are current they show my starting point in the project.

Movement:

While working on this project we were tasked to use Behavior Trees in the AIs structure. I had not worked with Behavior Trees previously to this project but it was something I knew a lot about. I decided for a faster start to make the main structure a StateMachine and then implement small trees in each state for things.

Above the video shows the first pass of the AI running towards the Player. I use navmesh to move the AI. This was and is currently being changed because the navmesh is not working properly so we are currently converting the AI to use navmesh sometimes but mainly using rays and physics. (read more on Ozzy Joelssons website)

Taking Damage:

I added so that the AI all have their own Physics Colliders that can be use with the Players projectiles. So when a projectile hits the enemy they take damage and play their animation. Each enemy dies from getting shot twice and then dissapere and sets their GameObject to inactive and removes the collisions.

Doing Damage:

I then started adding more consistent damage. The final damage calculations is a view cone area infront of the AI where there is a 45 degree cove infront of the AI and if the player is in that cone and withing a certain distance you take damage.

I use rays that we have in the engine that consists of a origin and a direction to make the cone infront of the enemy. The distance is set as the enemys attack range.

Ranged Enemy:

The ranged enemy throws a trident at the player. I worked alot with getting the timing of the throw correct because the AI has the trident in the animation and right when the trident “leaves” the hand i spawn in a projectile in its place that has the same mesh. This was made with frame data from the animator the specific frame the trident dissapers I load a new one that does damage to the player.

Dodging:

View Cones:

I added View Cones to the AI so that the player can sneak up on the AI if they want and can sneak around them.
The View Cone is made with Rays and crossing and dotting them with the players position and if inside the cone then attack or run to the player.

A picture of the AIs Debug Lines for the View Cone in Editor.

A picture of the AIs Debug Lines for the View Cone in Editor.

I added View Cones to the AI so that the player can sneak up on the AI if they want and can sneak around them.
The View Cone is made with Rays and crossing and dotting them with the players position and if inside the cone then attack or run to the player.

I decided to make the View Cone as just 2 Rays because the AI is on a navmesh and the player pos is also on the navmesh so this Ray solution worked well and was very easy to implement.
I originally wanted to make it a actual mathematical cone in eye level on the AI but I quickly found out that it would take longer time than I wanted it to to implement so I decided for this solution which was much faster and easier to implenent.

Features in Development:

Wandering:
The AI will wander around the space and patroll the area instead of being idle all the time.

Bone Parenting:
We want to parent the projectile to the bones of the enemy so that it throws from the position of the bones world position but this feature is not in the game yet and for now the projectile gets thrown from the middle of the AI.

What I learned