feat: Add a multiplayer-synchronized portal door with visual elements, player detection, and dynamic color.

scripts/portal_door.gd

@@ -28,6 +28,9 @@ func _ready():
 	
 	# Visual feedback: indicate door is active
 	_update_visuals()
+	
+	# Adjust GroundIndicator position based on spawn_offset metadata
+	_adjust_indicator_position()
 
 func _on_body_entered(body: Node3D):
 	if not is_active: return
@@ -76,6 +79,15 @@ func _update_visuals():
 			var mat = frame.get_surface_override_material(0)
 			if mat:
 				mat.albedo_color = portal_color.lerp(Color.BLACK, 0.4)
+				
+	var ground = get_node_or_null("GroundIndicator")
+	if ground:
+		var mat = ground.get_surface_override_material(0)
+		if mat:
+			mat.albedo_color = portal_color
+			mat.albedo_color.a = 0.4
+			mat.emission = portal_color
+			mat.emission_energy_multiplier = 2.0
 
 func _initialize_unique_materials():
 	var vortex = get_node_or_null("Vortex")
@@ -96,9 +108,29 @@ func _initialize_unique_materials():
 			
 			if mat:
 				frame.set_surface_override_material(0, mat.duplicate())
+				
+	var ground = get_node_or_null("GroundIndicator")
+	if ground:
+		var mat = ground.get_surface_override_material(0)
+		if not mat:
+			mat = ground.mesh.surface_get_material(0)
+		if mat:
+			ground.set_surface_override_material(0, mat.duplicate())
 
-func get_teleport_target_position() -> Vector2i:
-	# This function will be called by the manager to determine WHERE the player spawns
-	# usually just outside the target door's position.
-	# For now, let's just return a placeholder that the manager will override.
-	return Vector2i.ZERO
+func _adjust_indicator_position():
+	# This uses the spawn_offset metadata set by PortalModeManager
+	# to push the ground indicator "into" the room.
+	if not has_meta("spawn_offset"): return
+	
+	var ground = get_node_or_null("GroundIndicator")
+	if not ground: return
+	
+	var offset_2d = get_meta("spawn_offset") # Vector2i
+	var offset_3d = Vector3(offset_2d.x, 0, offset_2d.y)
+	
+	# Convert the global direction (into the room) to local coordinates
+	var local_dir = to_local(global_position + offset_3d).normalized()
+	
+	# Nudge the indicator in that direction
+	ground.position = local_dir * 0.5 # Reduced from 0.6 to close the gap
+	ground.position.y = 0.05 # Keep it just above the floor