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Enemy AI

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Marco 2025-06-21 15:41:29 +02:00
commit ede8f2028a
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Scripts/Components/FSM/Enemy/3D/PlayerDetection3D.cs Normal file
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using Cirno.Scripts.Components.FSM._3DPlayer;
using Godot;
namespace Cirno.Scripts.Components.FSM.Enemy._3D;
public partial class PlayerDetection3D : Area3D
{
[Signal]
public delegate void PlayerInRangeEventHandler();
[Signal]
public delegate void PlayerOutOfRangeEventHandler();
[Export(PropertyHint.Layers3DPhysics)]
public uint ObstaclesCollisionMask { get; private set; }
public Vector3? LastKnownPlayerPosition { get; set; }
public Vector3? LastKnowPlayerVelocity { get; set; }
//public bool PlayerInActiveArea { get; private set; }
private CollisionShape3D _collisionShape;
private bool _initialized = false;
// public override void _Ready()
// {
// CallDeferred(MethodName.Initialize);
// }
private CharacterBody3D _mainBody;
public void Initialize(CharacterBody3D mainBody)
{
_mainBody = mainBody;
_initialized = true;
}
public void SetRange(float range)
{
_collisionShape ??= this.GetNode<CollisionShape3D>("CollisionShape3D");
if (_collisionShape.Shape is CylinderShape3D shape3D)
{
shape3D.Radius = range;
}
}
public bool IsPlayerInRange(float range)
{
if (!_initialized) return false;
if (GameController.Instance is null) return false;
if (!GameController.Instance.PlayerPosition.HasValue)
{
return false;
}
return this.GlobalPosition.DistanceTo(GameController.Instance.PlayerPosition.Value) <= range;
}
public bool IsPlayerInSight()
{
if (!_initialized) return false;
if (GameController.Instance is null) return false;
//if (_cachedPlayer == null) return false;
if (!GameController.Instance.PlayerPosition.HasValue) return false;
var found = HasLineOfSight(this.GlobalPosition, GameController.Instance.PlayerPosition.Value);
// var spaceState = GetWorld2D().DirectSpaceState;
//
// // It needs to use its own collision mask because it's detecting obstacles rather than the player
// var query = PhysicsRayQueryParameters2D.Create(this.GlobalPosition, GameController.Instance.PlayerPosition.Value, ObstaclesCollisionMask,
// [GetRid()]);
// //query.CollideWithBodies = true;
// //query.CollideWithAreas = true;
// // var query = PhysicsRayQueryParameters2D.Create(this.GlobalPosition, _cachedPlayer.GlobalPosition, CollisionMask, new Array<Rid> { GetRid() });
// var result = spaceState.IntersectRay(query);
//
// // If count is 0 then the player is in sight, otherwise there is level geometry in the way
// var found = result.Count == 0;
if (found)
{
LastKnownPlayerPosition = GameController.Instance.PlayerPosition;
LastKnowPlayerVelocity = GameController.Instance.PlayerVelocity;
}
return found;
}
private void _on_body_entered(Node3D area)
{
if (area is not IsoPlayerFSMProxy player) return;
EmitSignal(SignalName.PlayerInRange);
//PlayerInActiveArea = true;
}
private void _on_body_exited(Node3D area)
{
if (area is not IsoPlayerFSMProxy player) return;
EmitSignal(SignalName.PlayerOutOfRange);
//PlayerInActiveArea = false;
}
public bool HasLineOfSight(Vector3 startPos, Vector3 endPos)
{
var spaceState = GetWorld3D().DirectSpaceState;
// It needs to use its own collision mask because it's detecting obstacles rather than the player
var query = PhysicsRayQueryParameters3D.Create(startPos, endPos, ObstaclesCollisionMask,
[GetRid(), _mainBody.GetRid()]);
query.CollideWithBodies = true;
//query.CollideWithAreas = true;
// var query = PhysicsRayQueryParameters2D.Create(this.GlobalPosition, _cachedPlayer.GlobalPosition, CollisionMask, new Array<Rid> { GetRid() });
var result = spaceState.IntersectRay(query);
// If count is 0 then the player is in sight, otherwise there is level geometry in the way
var found = result.Count == 0;
return found;
}
}