MovementTests/scenes/projectile/Projectile.cs

using Godot;
using System;
using Chickensoft.AutoInject;
using Chickensoft.Introspection;
using Gamesmiths.Forge.Abilities;
using Gamesmiths.Forge.Core;
using Gamesmiths.Forge.Cues;
using Gamesmiths.Forge.Effects;
using Gamesmiths.Forge.Events;
using Gamesmiths.Forge.Godot.Resources.Abilities;
using Gamesmiths.Forge.Statescript;
using Gamesmiths.Forge.Tags;
using Movementtests.interfaces;
using Movementtests.tools;
using Node = Godot.Node;

[GlobalClass, Icon("res://assets/ui/IconGodotNode/node_3D/icon_bullet.png"), Meta(typeof(IAutoNode))]
public partial class Projectile : RigidBody3D, IForgeEntity, ITargetable, IKillable, ISpawnable
{
    public override void _Notification(int what) => this.Notify(what);
    
    #region Dependencies 
    
    [Dependency]
    public TagsManager TagsManager => this.DependOn<TagsManager>();
    [Dependency]
    public CuesManager CuesManager => this.DependOn<CuesManager>();
    
    #endregion
	
    #region IForgeEntity

    // Perfectly forward the IForgeEntity interface to the ForgeEntity component
    public EntityAttributes Attributes
    {
        get => ForgeEntity.Attributes;
        set => ForgeEntity.Attributes = value;
    }
    public EntityTags Tags
    {
        get => ForgeEntity.Tags;
        set => ForgeEntity.Tags = value;
    }
    public EffectsManager EffectsManager
    {
        get => ForgeEntity.EffectsManager;
        set => ForgeEntity.EffectsManager = value;
    }
    public EntityAbilities Abilities
    {
        get => ForgeEntity.Abilities;
        set => ForgeEntity.Abilities = value;
    }
    public EventManager Events
    {
        get => ForgeEntity.Events;
        set => ForgeEntity.Events = value;
    }

    public Variables SharedVariables
    {
        get => ForgeEntity.SharedVariables;
        set => ForgeEntity.SharedVariables = value; 
    }

    #endregion
    
    [Node("ForgeEntityNode")] public required ForgeEntityNode ForgeEntity { get; set;}

    [Export] public float Damage = 10f;
    [Export] public float Speed = 10f;
    [Export] public float HomingFactor = 0.2f;

    public Node3D? Target { get; set; }
    public Vector3? ImpulseDirection { get; set; }

    public void Init()
    {
        ApplyCentralImpulse(ComputeImpulseToTarget());
    }

    public Vector3 ComputeImpulseToTarget()
    {
        if (ImpulseDirection != null) return ImpulseDirection.Value;
        if (Target == null) return Vector3.Zero;
        return Vector3.Up * Speed;
        
        var targetDir = GlobalPosition.DirectionTo(Target.GlobalPosition);
        var hDir = new Vector3(targetDir.X, 0, targetDir.Z).Normalized();
        var throwDir = (hDir + 3*Vector3.Up).Normalized();
        var distanceTo = GlobalPosition.DistanceTo(Target.GlobalPosition);
        
        return throwDir * distanceTo*0.8f;
    }

    public override void _IntegrateForces(PhysicsDirectBodyState3D state)
    {
        base._IntegrateForces(state);
        if (Target == null) return;
        var targetPos = Target is ITargetable targetable ? targetable.GetTargetGlobalPosition() : Target.GlobalPosition;
        var targetVel = state.LinearVelocity + GlobalPosition.DirectionTo(targetPos) * HomingFactor;
        if (targetVel.Length() > Speed) targetVel = targetVel.Normalized() * Speed;
        state.LinearVelocity = targetVel;
        // var targetDir = GlobalPosition.DirectionTo(targetPos);
        // var hDir = new Vector3(targetDir.X, 0, targetDir.Z).Normalized();
        // var currentVelocityHDir = new Vector3(state.LinearVelocity.X, 0, state.LinearVelocity.Z);
        // var finalHDir = hDir*HomingFactor + currentVelocityHDir;
        // var combinedVelocity = new Vector3(finalHDir.X, state.LinearVelocity.Y, finalHDir.Z);
        // if (combinedVelocity.Length() > Speed) combinedVelocity = combinedVelocity.Normalized() * Speed;
        // state.LinearVelocity = combinedVelocity;
        // state.LinearVelocity += targetDir/5.0f;
    }

    public void OnResolved()
    {
        BodyEntered += OnProjectileHit;

        // Events.Subscribe(Tag.RequestTag(TagsManager, "events.weapon.flyingtick"), data => { GD.Print("tick"); });
    }

    private void OnProjectileHit(Node body)
    {
        if (body is IForgeEntity entity)
        {
            Events.Raise(new EventData
            {
                EventTags = Tag.RequestTag(TagsManager, "events.combat.hit").GetSingleTagContainer()!,
                Source = this,
                Target = entity,
                EventMagnitude = Damage
            });
        }
        
        Events.Raise(new EventData
        {
            EventTags = Tag.RequestTag(TagsManager, "events.weapon.planted").GetSingleTagContainer()!,
            Source = this,
            EventMagnitude = Damage
        });
        
        Kill();
    }

    public Vector3 GetTargetGlobalPosition()
    {
        return GlobalPosition;
    }

    public void Kill()
    {
        QueueFree();  // If thrown offmap
    }
}