Danmaku system

Scripts/Components/BulletSpawner.cs

@@ -0,0 +1,53 @@
+using Cirno.Scripts.Resources;
+using Godot;
+
+namespace Cirno.Scripts.Components;
+
+public partial class BulletSpawner : Node2D
+{
+    [Export] public PackedScene BulletScene;
+    private GameManager _gameManager;
+    
+    public override void _Ready()
+    {
+        _gameManager = GetNode<GameManager>("/root/GameScene");
+    }
+    
+    public void SpawnBullet(Vector2 position, Vector2 direction, float speed, BulletOwner owner, int count = 1, float angleOffset = 0, float spread = 0, PackedScene bulletScene = null, IBulletModifier modifier = null)
+    {
+        for (int i = 0; i < count; i++)
+        {
+            var bullet = this.CreateChildOf<Bullet>(_gameManager.BulletsContainer, bulletScene ?? BulletScene, position);
+            
+            //var bullet = BulletScene.Instantiate<Bullet>();
+            bullet.Position = position;
+            bullet.Owner = owner;
+            //bullet.Speed = speed;
+            
+            float modifiedSpeed = modifier?.ModifySpeed(speed, i) ?? speed;
+            bullet.Speed = modifiedSpeed;
+
+            Vector2 baseDirection = direction == Vector2.Zero ? Vector2.Right : direction.Normalized();
+            float baseAngle = Mathf.Atan2(baseDirection.Y, baseDirection.X);
+            //float angle = angleOffset + (360 / count) * i;
+            float angle = baseAngle + Mathf.DegToRad(angleOffset + (spread / count) * i);
+            Vector2 bulletDirection = new Vector2(Mathf.Cos(angle), Mathf.Sin(angle));
+            //Vector2 bulletDirection = new Vector2(Mathf.Cos(Mathf.DegToRad(angle)), Mathf.Sin(Mathf.DegToRad(angle)));
+
+            bullet.SetDirection(bulletDirection);
+            //GetParent().AddChild(bullet);
+        }
+    }
+    
+    public void SpawnTargetedBullet(Vector2 position, Vector2 target, float speed, BulletOwner owner, PackedScene bulletScene = null, int burstCount = 1, float spread = 0, IBulletModifier modifier = null)
+    {
+        Vector2 direction = (target - position).Normalized();
+        SpawnBullet(position, direction, speed, owner, burstCount, spread: spread, bulletScene: bulletScene, modifier: modifier);
+    }
+
+    public void SpawnSpiralPattern(Vector2 position, float speed, BulletOwner owner, int bulletCount, float rotationSpeed, double time, float spread, PackedScene bulletScene = null)
+    {
+        float angleOffset = (float)(rotationSpeed * time);
+        SpawnBullet(position, Vector2.Right, speed, owner, bulletCount, angleOffset, spread, bulletScene: bulletScene);
+    }
+}