Added more sound effects. Added initial weapon muzzle fire logic.

AlientAttack.MonoGame/Things/Weapons/Weapon.cs

@@ -1,6 +1,12 @@
-namespace AlienAttack.MonoGame.Things.Weapons;
+using AlienAttack.MonoGame.Things.Bullets;
+using AlienAttack.MonoGame.Things.Muzzles;
+using Microsoft.Xna.Framework;
+using System;
+using System.Linq;
 
-public abstract class Weapon : IWeapon
+namespace AlienAttack.MonoGame.Things.Weapons;
+
+internal abstract class Weapon : IWeapon
 {
     public abstract int FireThreshold { get; }
     public int CurrentFireThreshold { get; private set; }
@@ -23,4 +29,59 @@ public abstract class Weapon : IWeapon
     }
 
     public abstract void Fire(Sprite owner, SpriteUpdateContext context);
+
+    protected static void FireBullet(FireBulletContext context)
+    {
+        var (x, y) = ComputeAnchorPosition(context);
+
+        foreach (Shot shot in context.Shots)
+        {
+            Bullet bullet = context.Factory(x + shot.OffsetX, y + shot.OffsetY, shot.XVelocity, shot.YVelocity, context.Owner);
+            context.SpriteUpdateContext.SpawnSprite(bullet);
+        }
+    }
+
+    private static (float x, float y) ComputeAnchorPosition(FireBulletContext context)
+    {
+        Sprite owner = context.Owner;
+        int bw = context.BulletWidth;
+        int bh = context.BulletHeight;
+        Anchor anchor = context.Anchor;
+
+        float left = owner.XPosition;
+        float top = owner.YPosition;
+        float right = owner.XPosition + owner.BoundBox.Width;
+        float bottom = owner.YPosition + owner.BoundBox.Height;
+
+        return anchor switch
+        {
+            Anchor.TopLeft => (left, top - bh),
+            Anchor.TopCenter => (left + (owner.BoundBox.Width - bw) / 2f, top - bh),
+            Anchor.TopRight => (right - bw, top - bh),
+
+            Anchor.Center => (left + (owner.BoundBox.Width - bw) / 2f, top + (owner.BoundBox.Height - bh) / 2f),
+
+            Anchor.BottomLeft => (left, bottom),
+            Anchor.BottomCenter => (left + (owner.BoundBox.Width - bw) / 2f, bottom),
+            Anchor.BottomRight => (right - bw, bottom),
+
+            _ => (left, top)
+        };
+    }
+
+    protected static void FireFromMuzzle(FireBulletFromMuzzleContext context)
+    {
+        if (context.Owner is not Player player)
+            return;
+
+        foreach (MuzzleShot shot in context.Shots)
+        {
+            var m = player.Muzzles.First(x => x.Id == shot.Muzzle).LocalPx;
+            Vector2 worldMuzzle = MuzzleMath.GetMuzzleWorld(player, m);
+            Vector2 bulletPos = MuzzleMath.CenterBulletOn(worldMuzzle, context.BulletWidth, context.BulletHeight) + context.ExtraOffset;
+
+            Bullet bullet = context.Factory(bulletPos.X, bulletPos.Y, shot.XVelocity, shot.YVelocity, context.Owner);
+            context.SpriteUpdateContext.SpawnSprite(bullet);
+        }
+    }
 }