Added basic turret logic.

AlientAttack.MonoGame/Content/Content.mgcb

@@ -1997,7 +1997,7 @@
 /processorParam:ResizeToPowerOfTwo=False
 /processorParam:MakeSquare=False
 /processorParam:TextureFormat=Color
-/build:Sprites/GunTurret_ExampleGun_png_processed.png
+/build:Sprites/GunTurret_ExampleGun_png_processed.png;Sprites/GunTurret_ExampleGun.png
 
 #begin Sprites/GunTurret_Green_png_processed.png
 /importer:TextureImporter
@@ -2009,7 +2009,7 @@
 /processorParam:ResizeToPowerOfTwo=False
 /processorParam:MakeSquare=False
 /processorParam:TextureFormat=Color
-/build:Sprites/GunTurret_Green_png_processed.png
+/build:Sprites/GunTurret_Green_png_processed.png;Sprites/GunTurret_Green.png
 
 #begin Sprites/GunTurret_Orange_png_processed.png
 /importer:TextureImporter
@@ -2021,7 +2021,7 @@
 /processorParam:ResizeToPowerOfTwo=False
 /processorParam:MakeSquare=False
 /processorParam:TextureFormat=Color
-/build:Sprites/GunTurret_Orange_png_processed.png
+/build:Sprites/GunTurret_Orange_png_processed.png;Sprites/GunTurret_Orange.png
 
 #begin Sprites/GunTurret_Red_png_processed.png
 /importer:TextureImporter
@@ -2033,7 +2033,7 @@
 /processorParam:ResizeToPowerOfTwo=False
 /processorParam:MakeSquare=False
 /processorParam:TextureFormat=Color
-/build:Sprites/GunTurret_Red_png_processed.png
+/build:Sprites/GunTurret_Red_png_processed.png;Sprites/GunTurret_Red.png
 
 #begin Sprites/GunTurret_Teal_png_processed.png
 /importer:TextureImporter
@@ -2045,7 +2045,7 @@
 /processorParam:ResizeToPowerOfTwo=False
 /processorParam:MakeSquare=False
 /processorParam:TextureFormat=Color
-/build:Sprites/GunTurret_Teal_png_processed.png
+/build:Sprites/GunTurret_Teal_png_processed.png;Sprites/GunTurret_Teal.png
 
 #begin Sprites/GunTurretMount_png_processed.png
 /importer:TextureImporter
@@ -2057,7 +2057,7 @@
 /processorParam:ResizeToPowerOfTwo=False
 /processorParam:MakeSquare=False
 /processorParam:TextureFormat=Color
-/build:Sprites/GunTurretMount_png_processed.png
+/build:Sprites/GunTurretMount_png_processed.png;Sprites/GunTurretMount.png
 
 #begin Sprites/Laser_Large_png_processed.png
 /importer:TextureImporter

AlientAttack.MonoGame/GameLoops/GameLoop.cs

@@ -1,6 +1,7 @@
 using AlienAttack.MonoGame.Things;
 using AlienAttack.MonoGame.Things.Enemies;
 using AlienAttack.MonoGame.Things.Enemies.Mines;
+using AlienAttack.MonoGame.Things.Enemies.Turrets;
 using AlienAttack.MonoGame.Things.Stars;
 using AlienAttack.MonoGame.View;
 using Microsoft.Xna.Framework;
@@ -381,6 +382,30 @@ internal class GameLoop : GameLoopBase
                 Sprites.Add(enemy);
                 _spawnNewEnemyThreshold = 100 + _random.Next(0, 100);
             }
+            else if (randomNumber == 9)
+            {
+                GreenTurret enemy = new(_random.Next(0, ViewTransform.ScreenWidth - Turret.MountWidth), -Turret.MountHeight);
+                Sprites.Add(enemy);
+                _spawnNewEnemyThreshold = 100 + _random.Next(0, 100);
+            }
+            else if (randomNumber == 10)
+            {
+                RedTurret enemy = new(_random.Next(0, ViewTransform.ScreenWidth - Turret.MountWidth), -Turret.MountHeight);
+                Sprites.Add(enemy);
+                _spawnNewEnemyThreshold = 100 + _random.Next(0, 100);
+            }
+            else if (randomNumber == 11)
+            {
+                OrangeTurret enemy = new(_random.Next(0, ViewTransform.ScreenWidth - Turret.MountWidth), -Turret.MountHeight);
+                Sprites.Add(enemy);
+                _spawnNewEnemyThreshold = 100 + _random.Next(0, 100);
+            }
+            else if (randomNumber == 12)
+            {
+                TealTurret enemy = new(_random.Next(0, ViewTransform.ScreenWidth - Turret.MountWidth), -Turret.MountHeight);
+                Sprites.Add(enemy);
+                _spawnNewEnemyThreshold = 100 + _random.Next(0, 100);
+            }
         }
     }
 }

AlientAttack.MonoGame/Things/Enemies/Turrets/GreenTurret.cs

@@ -0,0 +1,6 @@
+namespace AlienAttack.MonoGame.Things.Enemies.Turrets;
+
+public class GreenTurret(int x, int y) : Turret(x, y)
+{
+    protected override string TurretColor => "Green";
+}

AlientAttack.MonoGame/Things/Enemies/Turrets/OrangeTurret.cs

@@ -0,0 +1,6 @@
+namespace AlienAttack.MonoGame.Things.Enemies.Turrets;
+
+public class OrangeTurret(int x, int y) : Turret(x, y)
+{
+    protected override string TurretColor => "Orange";
+}

AlientAttack.MonoGame/Things/Enemies/Turrets/RedTurret.cs

@@ -0,0 +1,6 @@
+namespace AlienAttack.MonoGame.Things.Enemies.Turrets;
+
+public class RedTurret(int x, int y) : Turret(x, y)
+{
+    protected override string TurretColor => "Red";
+}

AlientAttack.MonoGame/Things/Enemies/Turrets/TealTurret.cs

@@ -0,0 +1,6 @@
+namespace AlienAttack.MonoGame.Things.Enemies.Turrets;
+
+public class TealTurret(int x, int y) : Turret(x, y)
+{
+    protected override string TurretColor => "Teal";
+}

AlientAttack.MonoGame/Things/Enemies/Turrets/Turret.cs

@@ -0,0 +1,98 @@
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+
+namespace AlienAttack.MonoGame.Things.Enemies.Turrets;
+
+public abstract class Turret : MoveableSprite
+{
+    public const int MountWidth = 63;
+    public const int MountHeight = 63;
+
+    public const int TurretWidth = 38;
+    public const int TurretHeight = 33;
+
+    public const int GunWidth = 8;
+    public const int GunHeight = 38;
+
+    protected float Rotation = 0;
+
+    protected Vector2 MountOrigin = new(MountWidth / 2, MountHeight /2);
+    protected Vector2 TurretOrigin = new(TurretWidth / 2, TurretHeight / 2);
+    protected Vector2 GunOrigin = new(GunWidth / 2, GunHeight / 2);
+
+    protected abstract string TurretColor { get; }
+
+    public Turret(int x, int y) : base(x, y)
+    {
+        BoundBox = new(10, 10, 44, 44); // TODO
+        YVelocity = 1;
+        XVelocity = 0;
+    }
+
+    public override void Draw(SpriteDrawArgs args)
+    {
+        DrawMount(args);
+        DrawTurret(args);
+        DrawGun(args);
+        //DrawCollisionBox(args);
+    }
+
+    private void DrawMount(SpriteDrawArgs args)
+    {
+        Texture2D texture = args.Content.Load<Texture2D>("Sprites/GunTurretMount");
+        args.SpriteBatch.Draw(texture, Position, null, DrawColor, Rotation, MountOrigin, 1f, SpriteEffects.None, 1);
+    }
+
+    private void DrawTurret(SpriteDrawArgs args)
+    {
+        Texture2D texture = args.Content.Load<Texture2D>($"Sprites/GunTurret_{TurretColor}");
+        args.SpriteBatch.Draw(texture, Position, null, DrawColor, Rotation, TurretOrigin, 1f, SpriteEffects.None, 1);
+    }
+
+    private void DrawGun(SpriteDrawArgs args)
+    {
+        Texture2D texture = args.Content.Load<Texture2D>("Sprites/GunTurret_ExampleGun");
+        args.SpriteBatch.Draw(texture, Position, null, DrawColor, Rotation, GunOrigin, 1f, SpriteEffects.None, 1);
+    }
+
+    private void DrawCollisionBox(SpriteDrawArgs args)
+    {
+        //var pixel = DebugPixel; // static cached
+
+        Texture2D pixel = new Texture2D(args.SpriteBatch.GraphicsDevice, 1, 1);
+        pixel.SetData(new[] { Color.White });
+
+        //Rectangle r = GetWorldCollisionBox();
+
+        Color c = Color.LimeGreen; // debug color
+
+        // Top
+        args.SpriteBatch.Draw(pixel, new Rectangle(CollisionBox.X, CollisionBox.Y, CollisionBox.Width, 1), c);
+        // Bottom
+        args.SpriteBatch.Draw(pixel, new Rectangle(CollisionBox.X, CollisionBox.Bottom - 1, CollisionBox.Width, 1), c);
+        // Left
+        args.SpriteBatch.Draw(pixel, new Rectangle(CollisionBox.X, CollisionBox.Y, 1, CollisionBox.Height), c);
+        // Right
+        args.SpriteBatch.Draw(pixel, new Rectangle(CollisionBox.Right - 1, CollisionBox.Y, 1, CollisionBox.Height), c);
+    }
+
+    public override sealed void Update(SpriteUpdateContext context)
+    {
+        base.Update(context);
+
+        CollisionBox = new Rectangle((int)XPosition + BoundBox.X - (int)MountOrigin.X, (int)YPosition + BoundBox.Y - (int)MountOrigin.Y, BoundBox.Width, BoundBox.Height);
+
+        if (YPosition - MountOrigin.Y > context.ViewTransform.ScreenHeight)
+        {
+            IsDead = true;
+            return;
+        }
+
+        Rotation += 0.01f;
+
+        if (Rotation > 360f)
+        {
+            Rotation = 0;
+        }
+    }
+}