feat: turrents and explosions

Game/Target/Explosion/explosion_gpu_particles_2d.tscn

@@ -0,0 +1,44 @@
+[gd_scene format=3 uid="uid://cd8w4ydeugrxn"]
+
+[ext_resource type="Texture2D" uid="uid://ddv3d3cguh5hd" path="res://Game/Target/Explosion/scorches.png" id="1_rjvc0"]
+
+[sub_resource type="CanvasItemMaterial" id="CanvasItemMaterial_bfsaf"]
+particles_animation = true
+particles_anim_h_frames = 3
+particles_anim_v_frames = 1
+particles_anim_loop = false
+
+[sub_resource type="Curve" id="Curve_ytfwl"]
+_data = [Vector2(0.00554017, 0.021126747), 0.0, 0.0, 0, 0, Vector2(0.14681442, 0.99295783), 0.0, 0.0, 0, 0, Vector2(1, 0), 0.0, 0.0, 0, 0]
+point_count = 3
+
+[sub_resource type="CurveTexture" id="CurveTexture_jyg1o"]
+curve = SubResource("Curve_ytfwl")
+
+[sub_resource type="ParticleProcessMaterial" id="ParticleProcessMaterial_u8d0v"]
+lifetime_randomness = 0.1
+particle_flag_disable_z = true
+emission_shape = 1
+emission_sphere_radius = 33.35
+spread = 180.0
+initial_velocity_min = 47.62
+initial_velocity_max = 47.62
+gravity = Vector3(0, 0, 0)
+damping_min = 97.494
+damping_max = 97.494
+color = Color(1, 0.11372549, 0.22745098, 1)
+alpha_curve = SubResource("CurveTexture_jyg1o")
+anim_speed_min = 10.0
+anim_speed_max = 10.0
+
+[node name="ExplosionGPUParticles2D" type="GPUParticles2D" unique_id=1991976710]
+z_index = 1
+z_as_relative = false
+material = SubResource("CanvasItemMaterial_bfsaf")
+emitting = false
+amount = 32
+texture = ExtResource("1_rjvc0")
+lifetime = 0.3
+one_shot = true
+visibility_rect = Rect2(-200, -75, 400, 150)
+process_material = SubResource("ParticleProcessMaterial_u8d0v")

Game/Target/Explosion/scorches.png.import

@@ -0,0 +1,40 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://ddv3d3cguh5hd"
+path="res://.godot/imported/scorches.png-b8a9f74019ec3d75b5befcdf7090cc9b.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://Game/Target/Explosion/scorches.png"
+dest_files=["res://.godot/imported/scorches.png-b8a9f74019ec3d75b5befcdf7090cc9b.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/uastc_level=0
+compress/rdo_quality_loss=0.0
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/channel_remap/red=0
+process/channel_remap/green=1
+process/channel_remap/blue=2
+process/channel_remap/alpha=3
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

Game/Target/Target.cs

@@ -12,8 +12,9 @@ public partial class Target : Node2D, ITarget
     private readonly Subject<Unit> _timedOut = new();
     [Export] public required Area2D CollisionArea;
     [Export] public required Sprite2D Image;
-    [Export] public double TimeOutDurationInSeconds;
     [Export] public required Timer TimeOutTimer;
+    [Export] private PackedScene _explosionPackedScene = null!;
+    [Inject] private ILevel _level = null!;
 
     [Inject] private ITargetCollector _targetCollector = null!;
 
@@ -25,7 +26,8 @@ public partial class Target : Node2D, ITarget
     {
         Image.Visible = true;
         CollisionArea.Monitoring = true;
-        TimeOutTimer.Start(TimeOutDurationInSeconds);
+        CollisionArea.Monitorable = true;
+        TimeOutTimer.Start(_level.SpawnDuration.TotalSeconds);
     }
 
     public override void _Ready()
@@ -39,18 +41,29 @@ public partial class Target : Node2D, ITarget
         _hit.Dispose();
     }
 
-    // todo: hook to collision
+    private void OnAreaEntered(Area2D _)
+    {
+        OnHit();
+    }
+
     private void OnHit()
     {
         Disable();
         TimeOutTimer.Stop();
         _hit.OnNext(Unit.Default);
+
+        var explosion = (GpuParticles2D)_explosionPackedScene.Instantiate();
+        explosion.GlobalPosition = GlobalPosition;
+        explosion.Emitting = true;
+        GetTree().CurrentScene.AddChild(explosion);
     }
 
     private void Disable()
     {
         Image.Visible = false;
-        CollisionArea.Monitoring = false;
+        // can't se monitoring/monitorable when inside the collision code, like during OnHit
+        CollisionArea.SetDeferred(Area2D.PropertyName.Monitoring, false);
+        CollisionArea.SetDeferred(Area2D.PropertyName.Monitorable, false);
     }
 
     private void OnTimeout()

Game/Target/target.tscn

@@ -2,6 +2,7 @@
 
 [ext_resource type="Script" uid="uid://bv2hat41dyxiv" path="res://Game/Target/Target.cs" id="1_ouani"]
 [ext_resource type="Texture2D" uid="uid://m4pvy8kkw7k4" path="res://Game/Target/towerDefense_tile136.png" id="2_olsqn"]
+[ext_resource type="PackedScene" uid="uid://cd8w4ydeugrxn" path="res://Game/Target/Explosion/explosion_gpu_particles_2d.tscn" id="2_uqpd1"]
 
 [sub_resource type="CircleShape2D" id="CircleShape2D_uqpd1"]
 radius = 60.033325
@@ -10,8 +11,8 @@ radius = 60.033325
 script = ExtResource("1_ouani")
 CollisionArea = NodePath("CollisionArea")
 Image = NodePath("Sprite2D")
-TimeOutDurationInSeconds = 7.0
 TimeOutTimer = NodePath("TimeOutTimer")
+_explosionPackedScene = ExtResource("2_uqpd1")
 
 [node name="Sprite2D" type="Sprite2D" parent="." unique_id=31059524]
 visible = false
@@ -30,4 +31,5 @@ shape = SubResource("CircleShape2D_uqpd1")
 [node name="TimeOutTimer" type="Timer" parent="." unique_id=1079777109]
 one_shot = true
 
+[connection signal="area_entered" from="CollisionArea" to="." method="OnAreaEntered"]
 [connection signal="timeout" from="TimeOutTimer" to="." method="OnTimeout"]