Behaviour Tree

The BaseEnemyTree is an abstract class that holds is meant to be inherited by other behaviour trees for specific enemy types. The root node represents the starting point of the behaviour tree and gets evaluated each frame which in turn starts the enemy's decision making and actions. The class also has a blackboard that allows the ai to store or retrieve information.The tree also has a reference to the enemy game object for future uses.in start we assign the root node to the return value of SetupTree() function. In the Base class it's an abstract function but SetupTree() is where we create our root node and if we want to create a more complicated behaviour tree we can add node children to the root node.

Node

Nodeis an abstract class that other behaviour inherits from. Each Node will have the reference to the tree that uses the node but the nodes can also have more child node to make complicated AI behaviour which is also why the nodes need states so we can manage what happens if the node fails, succeeds or is running.The node TaskMoveToKid is a node that we use in all of the behaviour trees which get's initialized in the SetupTree() function. If we want to make a more complicated behaviour tree.The Evaluate() function is the behaviour itself, where we get the function from our enemy reference.

Enemies

In knightmare night we have 3 different enemy type which inherits from the base enemy class EnemyBase. Those enemy types are Mare, Ghost and ZigZagGhost. All of the enemies behaviour can get damaged and killed by the player and they have some features that differentiate them.The Ghost and ZigZagGhost enemy is very similar to eachother. They both die in one hit but they have different moving pattern. The ghost is our simples enemy to defeat. It's slow and moves in a straigth line but it has a fast spawn rate which is meant to overwhelm the player.The ZigZagGhost is faster than the Ghost and has a tricky movement pattern going left to right making it difficult to hit by throwing the shield, but has a lower spawn rate than the Ghost.Mare is the tank of the enemy. It's super slow and has the same movement pattern as the Ghost but can take multiple hit. If the player damages it once the Mare will be stunned for a short duration.