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Type.EVE

Unity C# AI Team
January 04, 2021 - January 29, 2021 3 weeks AI Programmer 2 people

Overview

School project focused on implementing Behavior Trees for AI control. Created a strategic game where AI units make complex decisions using hierarchical behavior tree structures.

Technical Focus: Behavior Trees

Implemented a comprehensive behavior tree system with over 600 lines of AI logic, featuring sequences, selectors, conditions, and actions for strategic unit control.

Code Highlight

Behavior tree builder showing hierarchical decision-making structure:

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private RootNode BuildBehaviourTree() {
    return new RootNode(new Selector(new List<Node>() {
        new Sequence(new List<Node>() {
            new Condition(NormalBehaviour) { Name="AggressiveCheck" },
            new Action(ToPursue) { Name="ToPursue" },
            new Sequence(new List<Node>() {
                new Condition(CanAttackTarget) { Name="CanAttackTarget" },
                new Action(ToIdle) { Name="ToIdle" },
                new Sequence(new List<Node>() {
                    new Action(DealDamage) { Name="DealDamage" },
                    new RepeatUntilFailure(new Condition(TargetDied)) { Name="TargetDied" }
                })
            }) { Name="AttackTarget" },
        }) { Name="NormalBehaviour" },
        
        new Sequence(new List<Node>() {
            new Condition(UsingWaypoints) { Name="DefensiveCheck" },
            new Action(ToPursue) { Name="ToPursue" },
            new Selector(new List<Node>() {
                // ... waypoint and attack logic
            })
        }) { Name="WaypointBehaviour" },
    }));
}

Technologies

  • Engine: Unity3D
  • Language: C#
  • Key Systems: Behavior Trees, AI, NavMesh, coroutines
  • Libraries: TextMeshPro
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