brick-framework/GameCore/Combat/ProjectileCleanupSystem.cs

using GameCore.ECS;
using GameCore.ECS.Interfaces;
using GameCore.Physics;

namespace GameCore.Combat;

public class ProjectileCleanupSystem : ISystem
{
    public void Update(World world, float deltaTime)
    {
        var projectiles = world.GetEntitiesWith<ProjectileComponent>();
        foreach (var projectile in projectiles)
        {
            var projectileData = world.GetComponent<ProjectileComponent>(projectile);
            var position = world.GetComponent<PositionComponent>(projectile);
            var velocity = world.GetComponent<VelocityComponent>(projectile);

            if (projectileData == null || position == null || velocity == null)
                continue;

            projectileData.Lifetime -= deltaTime;
            if (projectileData.Lifetime <= 0f) world.AddComponent(projectile, new DeathComponent());
        }
    }
}