fixed a wallhanging bug and explosion shader precompilation to alleviate stuttering

scenes/explosion/Explosion.cs

@@ -0,0 +1,36 @@
+using Godot;
+using System;
+using Movementtests.interfaces;
+
+[GlobalClass, Icon("res://assets/ui/IconGodotNode/node_3D/icon_projectile.png")]
+public partial class Explosion : Area3D, IDamageDealer
+{
+    [Export] public RDamage RDamage { get; set;}
+    [Export] public float Radius { get; set;}
+    [Export] public float ExplosionTime { get; set; } = 0.2f;
+    
+    public override void _Ready()
+    {
+        var sphereShape = GetNode<CollisionShape3D>("CollisionShape3D").Shape as SphereShape3D;
+        sphereShape!.Radius = Radius;
+        var sphereMesh = GetNode<MeshInstance3D>("MeshInstance3D").Mesh as SphereMesh;
+        sphereMesh!.Radius = Radius;
+        sphereMesh!.Height = Radius*2f;
+
+        GetTree().CreateTimer(ExplosionTime).Timeout += TriggerExplosion;
+    }
+
+    public void TriggerExplosion()
+    {
+        var bodies = GetOverlappingBodies();
+        foreach (var body in bodies)
+        {
+            if (body is IDamageable damageable)
+                damageable.TakeDamage(new DamageRecord(GlobalPosition, RDamage));
+            if (body is IStunnable stunnable)
+                stunnable.Stun();
+        }
+        
+        QueueFree();
+    }
+}