feat: merge Schritt 10 — spore overlay shader

ruf-der-pilze/scripts/network_manager.gd

@@ -15,6 +15,7 @@ signal player_left(peer_id: int)
 signal player_list_synced()
 signal game_started()
 signal roll_received(roller_peer_id: int, player_name: String, d20_result: int, modifier: int, total: int)
+signal overlay_changed(overlay_name: String)
 
 
 func start_server(port: int, max_clients: int) -> void:
@@ -160,6 +161,7 @@ func request_set_overlay(target_peer_id: int, overlay_name: String) -> void:
 @rpc("authority", "call_remote", "reliable")
 func set_overlay(overlay_name: String) -> void:
 	GameState.set_overlay_local(my_id, overlay_name)
+	overlay_changed.emit(overlay_name)
 
 
 @rpc("any_peer", "call_remote", "unreliable")

ruf-der-pilze/scripts/tavern.gd

@@ -5,6 +5,7 @@ const INTERACT_DISTANCE := 2.5
 
 var _modifier: int = 0
 var _roll_log: RichTextLabel
+var _spore_mat: ShaderMaterial
 
 
 func _ready() -> void:
@@ -23,6 +24,7 @@ func _ready() -> void:
 	timer.timeout.connect(_broadcast_camera_transform)
 	add_child(timer)
 	_setup_dice_ui()
+	_setup_spore_overlay()
 
 
 func _get_dm_peer_id() -> int:
@@ -142,6 +144,28 @@ func _on_roll_pressed() -> void:
 	NetworkManager.broadcast_roll.rpc_id(1, NetworkManager.my_id, d20, _modifier)
 
 
+func _setup_spore_overlay() -> void:
+	var canvas := CanvasLayer.new()
+	canvas.name = "SporeOverlay"
+	canvas.layer = 10
+	add_child(canvas)
+
+	var rect := ColorRect.new()
+	rect.set_anchors_and_offsets_preset(Control.PRESET_FULL_RECT)
+	rect.mouse_filter = Control.MOUSE_FILTER_IGNORE
+	_spore_mat = ShaderMaterial.new()
+	_spore_mat.shader = load("res://shaders/spore_overlay.gdshader") as Shader
+	rect.material = _spore_mat
+	canvas.add_child(rect)
+
+	NetworkManager.overlay_changed.connect(_on_overlay_changed)
+
+
+func _on_overlay_changed(overlay_name: String) -> void:
+	var intensity := 1.0 if overlay_name == "spore_active" else 0.0
+	_spore_mat.set_shader_parameter("intensity", intensity)
+
+
 func _on_roll_received(roller_peer_id: int, player_name: String, d20_result: int, modifier: int, total: int) -> void:
 	var mod_str := " %+d" % modifier if modifier != 0 else ""
 	var line := "[b]%s[/b] würfelt %d%s = [b]%d[/b]" % [player_name, d20_result, mod_str, total]

ruf-der-pilze/shaders/spore_overlay.gdshader

@@ -0,0 +1,34 @@
+shader_type canvas_item;
+
+uniform float intensity : hint_range(0.0, 1.0) = 0.0;
+uniform sampler2D screen_texture : hint_screen_texture, filter_linear_mipmap;
+
+void fragment() {
+    vec2 uv = SCREEN_UV;
+
+    // Subtle distortion — wavy lines, stronger at higher intensity
+    float distort_x = sin(uv.y * 35.0 + TIME * 1.8) * 0.003 * intensity;
+    float distort_y = cos(uv.x * 28.0 + TIME * 1.2) * 0.002 * intensity;
+
+    // Sample screen with slight RGB split for chromatic aberration feel
+    float split = 0.003 * intensity;
+    vec4 r = texture(screen_texture, uv + vec2(distort_x + split, distort_y));
+    vec4 g = texture(screen_texture, uv + vec2(distort_x,         distort_y));
+    vec4 b = texture(screen_texture, uv + vec2(distort_x - split, distort_y));
+    vec4 screen = vec4(r.r, g.g, b.b, 1.0);
+
+    // Vignette — darken edges
+    vec2 center = uv - 0.5;
+    float vignette = 1.0 - smoothstep(0.25, 0.75, length(center) * 1.6);
+    screen.rgb *= mix(1.0, vignette, intensity * 0.6);
+
+    // Green spore tint
+    vec3 spore_tint = vec3(0.05, 0.45, 0.12);
+    screen.rgb = mix(screen.rgb, screen.rgb * spore_tint * 2.2, intensity * 0.35);
+
+    // Slight brightness pulse
+    float pulse = 1.0 + sin(TIME * 1.5) * 0.04 * intensity;
+    screen.rgb *= pulse;
+
+    COLOR = screen;
+}