Add project files.

AlientAttack.MonoGame/Things/Enemies/Enemy.cs

@@ -0,0 +1,117 @@
+using AlienAttack.MonoGame.Things.Bullets;
+using AlienAttack.MonoGame.Things.Items;
+using AlienAttack.MonoGame.Things.Weapons;
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+using Microsoft.Xna.Framework.Input;
+using System;
+using System.Collections.Generic;
+
+namespace AlienAttack.MonoGame.Things.Enemies;
+
+internal class Enemy : MoveableSprite
+{
+    //Enemy01_Green_Frame_1_png_processed
+
+    protected ICollection<IWeapon> ActiveWeapons = [];
+    protected int FireThreshold => 20;
+    protected int CurrentFireThreshold { get; set; } = 20;
+    protected int Health { get; set; } = 5;
+
+    public Enemy(int x, int y) : base(x, y)
+    {
+        BoundBox = new Rectangle(0, 0, 64, 64);
+        YVelocity = 1;
+        ActiveWeapons.Add(new Minigun());
+        //ActiveWeapons.Add(new FastMinigun());
+    }
+
+    public override void Draw(SpriteDrawArgs args)
+    {
+        Texture2D texture = args.Content.Load<Texture2D>(@$"Sprites\Enemy01_Green_Frame_1_png_processed");
+        SpriteEffects spriteEffects = SpriteEffects.None;
+
+        args.SpriteBatch.Draw(texture, Position, null, DrawColor, 0, new Vector2(0, 0), 1, spriteEffects, 1);
+
+        base.Draw(args);
+    }
+
+    public override void Update(SpriteUpdateContext context)
+    {
+        //YPosition += 1;
+
+        if (Health <= 0)
+        {
+            IsDead = true;
+            context.SpawnSprite(new Explosion((int)XPosition, (int)YPosition, XVelocity, YVelocity));
+
+            switch (context.Random.Next(0, 4))
+            {
+                case 0:
+                    context.SpawnSprite(new Health((int)XPosition, (int)YPosition));
+                    break;
+                case 1:
+                    context.SpawnSprite(new Shields((int)XPosition, (int)YPosition));
+                    break;
+                case 2:
+                    context.SpawnSprite(new Ammo((int)XPosition, (int)YPosition));
+                    break;
+                case 3:
+                    context.SpawnSprite(new Energy((int)XPosition, (int)YPosition));
+                    break;
+                case 4:
+                    context.SpawnSprite(new Rockets((int)XPosition, (int)YPosition));
+                    break;
+            }
+
+            return;
+        }
+
+        if (YPosition > context.ViewTransform.ScreenHeight)
+        {
+            IsDead = true;
+            return;
+        }
+
+        if (CurrentFireThreshold > 0)
+        {
+            CurrentFireThreshold--;
+        }
+
+        if (CurrentFireThreshold == 0 && context.Random.Next(0, 100) == 1)
+        {
+            float originX = XPosition + (BoundBox.Width / 2) - (7 / 2);
+
+            context.SpawnSprite(new MinigunBulletSmall(originX - 9, YPosition + BoundBox.Height - 12, 0, 2 + YVelocity, this));
+            context.SpawnSprite(new MinigunBulletSmall(originX + 14, YPosition + BoundBox.Height - 12, 0, 2 + YVelocity, this));
+
+            CurrentFireThreshold = FireThreshold;
+        }
+
+        //CheckMove(context);
+        CheckFire(context);
+
+        base.Update(context);
+    }
+
+    private void CheckFire(SpriteUpdateContext context)
+    {
+        //foreach (IWeapon weapon in ActiveWeapons)
+        //{
+        //    weapon.UpdateFireThreshold();
+        //}
+
+        //foreach (IWeapon weapon in ActiveWeapons)
+        //{
+        //    weapon.TryFire(this, context);
+        //}
+    }
+
+    public override void OnCollision(SpriteCollisionContext context)
+    {
+        if (context.Sprite is Bullet bullet && bullet.Owner is Player)
+        {
+            Health -= bullet.Damage;
+        }
+    }
+}