Updated asteriods, mines, and explosions.

AlientAttack.MonoGame/Things/Enemies/Mines/RedMine.cs

@@ -1,6 +1,78 @@
-namespace AlienAttack.MonoGame.Things.Enemies.Mines;
+using AlienAttack.MonoGame.Things.Bullets;
+using Microsoft.Xna.Framework;
+
+namespace AlienAttack.MonoGame.Things.Enemies.Mines;
 
 public class RedMine(int x, int y) : Mine(x, y)
 {
+    protected bool IsCharging = false;
+    protected Vector2 TargetCenter;
     protected override string CoverColor => "Red";
+    protected override float ExplodeRadius => 18f;
+    protected override int MaxHealth => 10;
+
+    // Tunables
+    private const float DetectRange = 200f;
+    private const float ChargeSpeed = 5f;      // try 3.5–6.0
+
+    protected override void OnUpdate(SpriteUpdateContext context)
+    {
+        // If not charging yet, see if we should lock on
+        if (!IsCharging)
+        {
+            if (DistanceToPlayer > DetectRange)
+                return;
+
+            Charge(context.Player);
+        }
+
+        // We are charging: steer directly toward the locked target point
+        Vector2 toTarget = TargetCenter - new Vector2(XPosition + Origin.X, YPosition + Origin.Y);
+
+        float dist = toTarget.Length();
+
+        if (dist <= ExplodeRadius)
+        {
+            IsDead = true;
+
+            // Optionally: explode at target (top-left adjustment)
+            XPosition = TargetCenter.X - Origin.X;
+            YPosition = TargetCenter.Y - Origin.Y;
+
+            SpawnExplosion(context); // uses current XPosition/YPosition
+            return;
+        }
+
+        // Normalize direction (avoid NaN if dist == 0)
+        Vector2 dir = toTarget / dist;
+
+        // Set velocities for base.Update to apply next frame
+        XVelocity = dir.X * ChargeSpeed;
+        YVelocity = dir.Y * ChargeSpeed;
+
+        // Optional: if you want it to stop “floating down” once charging
+        // (it will anyway, because we overwrite YVelocity)
+    }
+
+    public override void OnCollision(SpriteCollisionContext context)
+    {
+        base.OnCollision(context);
+
+        if (context.Sprite is Bullet bullet && bullet.Owner is Player player && IsCharging == false)
+        {
+            Charge(player);
+        }
+    }
+
+    private void Charge(Sprite target)
+    {
+        IsCharging = true;
+
+        float x = target.XPosition + target.Origin.X;
+        float y = target.YPosition + target.Origin.Y;
+
+        TargetCenter = new Vector2(x, y);
+
+        RotationSpeed *= ChargeSpeed;
+    }
 }