106 lines
2.8 KiB
C#
106 lines
2.8 KiB
C#
using Chickensoft.AutoInject;
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using Chickensoft.Introspection;
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using Godot;
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using Godot.Collections;
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using Zennysoft.Game.Abstractions.Entity;
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namespace Zennysoft.Game.Ma;
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[Meta(typeof(IAutoNode))]
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public partial class PatrolBehavior : Node3D, IBehavior
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{
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public override void _Notification(int what) => this.Notify(what);
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[Export] private double _patrolSpeed { get; set; } = 100f;
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[Export] private double _thinkTime { get; set; } = 0.8f;
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[Export] private float _patrolRange { get; set; } = 5f;
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[Export] private float _patrolTime { get; set; } = 10f;
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private Timer _patrolTimer { get; set; } = default!;
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private NavigationAgent3D _navigationAgent;
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private int _recursiveCounter = 0;
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private Vector3 _homePosition;
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public Vector3 HomePosition
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{
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get => _homePosition;
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set
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{
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_homePosition = value;
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_navigationAgent.TargetPosition = value;
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}
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}
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[Signal] public delegate void OnVelocityComputedEventHandler(Vector3 safeVelocity);
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public void OnReady()
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{
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_patrolTimer = new Timer() { WaitTime = _patrolTime };
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_patrolTimer.Timeout += PatrolTimer_Timeout;
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AddChild(_patrolTimer);
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SetPhysicsProcess(false);
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}
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public void Init(NavigationAgent3D navigationAgent)
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{
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_navigationAgent = navigationAgent;
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_navigationAgent.WaypointReached += NavigationAgent_WaypointReached;
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}
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private async void NavigationAgent_WaypointReached(Dictionary details)
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{
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await ToSignal(GetTree().CreateTimer(_thinkTime), "timeout");
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}
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public void StartPatrol()
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{
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SetPhysicsProcess(true);
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_patrolTimer?.Start();
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}
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public void StopPatrol()
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{
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SetPhysicsProcess(false);
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_patrolTimer?.Stop();
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}
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public void OnPhysicsProcess(double delta)
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{
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var nextVelocity = _navigationAgent.GetNextPathPosition();
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var parent = GetParent() as Node3D;
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var velocity = parent.GlobalPosition.DirectionTo(nextVelocity) * (float)_patrolSpeed * (float)delta;
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EmitSignal(SignalName.OnVelocityComputed, velocity);
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}
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public void SetPatrolTarget()
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{
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var rng = new RandomNumberGenerator();
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rng.Randomize();
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var randomPointX = rng.RandfRange(-_patrolRange, _patrolRange);
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var randomPointZ = rng.RandfRange(-_patrolRange, _patrolRange);
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_navigationAgent.TargetPosition = HomePosition + new Vector3(randomPointX, 0, randomPointZ);
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if (!_navigationAgent.IsTargetReachable())
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{
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_recursiveCounter++;
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if (_recursiveCounter <= 100)
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SetPatrolTarget();
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else
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_navigationAgent.TargetPosition = HomePosition;
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}
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_recursiveCounter = 0;
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}
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private void PatrolTimer_Timeout() => SetPatrolTarget();
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public void OnExitTree()
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{
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_patrolTimer.Stop();
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_patrolTimer.Timeout -= PatrolTimer_Timeout;
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_navigationAgent.WaypointReached -= NavigationAgent_WaypointReached;
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}
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}
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