Add attribute system with core stats and gameplay components

GameCore/Combat/ProjectileSystem.cs

@@ -0,0 +1,43 @@
+using GameCore.Combat.Effects;
+using GameCore.ECS;
+using GameCore.ECS.Interfaces;
+using GameCore.Physics;
+
+namespace GameCore.Combat;
+
+public class ProjectileSystem : ISystem
+{
+    public void Update(World world, float deltaTime)
+    {
+        var projectiles = world.GetEntitiesWith<ProjectileComponent>();
+        foreach (var projectile in projectiles)
+        {
+            var velocity = world.GetComponent<VelocityComponent>(projectile);
+            var position = world.GetComponent<PositionComponent>(projectile);
+            var projectileData = world.GetComponent<ProjectileComponent>(projectile);
+
+            if (velocity == null || position == null || projectileData == null)
+                continue;
+
+            var newPosition = position.Position + velocity.DesiredVelocity * deltaTime;
+
+            var hit = world.WorldQuery.Raycast(position.Position, newPosition, projectileData.Owner);
+            if (hit.DidHit)
+            {
+                var hitContext = new EffectContext
+                {
+                    World = world,
+                    Owner = projectileData.Owner,
+                    Target = hit.HitEntity
+                };
+
+                foreach (var effect in projectileData.OnHitEffects) effect.Execute(hitContext);
+
+                world.AddComponent(projectile, new DeathComponent());
+                continue;
+            }
+
+            position.Position = newPosition;
+        }
+    }
+}