Add edge-scrolling camera

core/edge_scroll_camera.gd

@@ -0,0 +1,69 @@
+## Scrolls the camera when the mouse cursor reaches the screen edge.
+## Attach to a Camera2D node. Requires an OrthographicCamera2D or ViewportContainer
+## to determine screen bounds at runtime.
+extends Camera2D
+
+## Speed at which the camera scrolls (pixels per second).
+@export var scroll_speed: float = 400.0
+
+## Distance from the edge (in pixels) that triggers scrolling.
+@export var edge_margin: float = 40.0
+
+## Whether to clamp the camera position to a specific region.
+@export var clamp_enabled: bool = false
+
+## Minimum bounds when clamping (in world space).
+@export var clamp_min: Vector2 = Vector2.ZERO
+
+## Maximum bounds when clamping (in world space).
+@export var clamp_max: Vector2 = Vector2.ZERO
+
+var _screen_rect: Rect2
+
+
+func _ready() -> void:
+	_update_screen_rect()
+	var viewport: Viewport = get_viewport()
+	if viewport != null:
+		viewport.size_changed.connect(_update_screen_rect)
+
+
+func _process(delta: float) -> void:
+	if is_zero_approx(scroll_speed):
+		return
+
+	var mouse_pos: Vector2 = get_viewport().get_mouse_position()
+	var scroll_dir: Vector2 = _get_scroll_direction(mouse_pos)
+
+	if scroll_dir != Vector2.ZERO:
+		position += scroll_dir * scroll_speed * delta
+
+	if clamp_enabled:
+		_clamp_position()
+
+
+func _get_scroll_direction(mouse_pos: Vector2) -> Vector2:
+	var direction: Vector2 = Vector2.ZERO
+
+	if mouse_pos.x < _screen_rect.position.x + edge_margin:
+		direction.x -= 1.0
+	elif mouse_pos.x > _screen_rect.position.x + _screen_rect.size.x - edge_margin:
+		direction.x += 1.0
+
+	if mouse_pos.y < _screen_rect.position.y + edge_margin:
+		direction.y -= 1.0
+	elif mouse_pos.y > _screen_rect.position.y + _screen_rect.size.y - edge_margin:
+		direction.y += 1.0
+
+	return direction.normalized()
+
+
+func _clamp_position() -> void:
+	position.x = clampf(position.x, clamp_min.x, clamp_max.x)
+	position.y = clampf(position.y, clamp_min.y, clamp_max.y)
+
+
+func _update_screen_rect() -> void:
+	var viewport: Viewport = get_viewport()
+	if viewport != null:
+		_screen_rect = viewport.get_visible_rect()

core/edge_scroll_camera.gd.uid

@@ -0,0 +1 @@
+uid://b6systw05frh0

docs/gyms/tiny_sword/tiny_sword.tscn

@@ -16,6 +16,7 @@
 [ext_resource type="PackedScene" uid="uid://bf8lqbexvnx6e" path="res://docs/gyms/tiny_sword/buildings/monastery/monastery.tscn" id="13_no27p"]
 [ext_resource type="PackedScene" uid="uid://rejxvjwybkll" path="res://sandbox/tiny_swords/Terrain/Resources/Wood/Trees/tree_1.tscn" id="14_0cs5o"]
 [ext_resource type="PackedScene" uid="uid://bp5ng4vu4ot4a" path="res://docs/gyms/tiny_sword/buildings/alchemy_tower/alchemy_tower.tscn" id="14_hum8s"]
+[ext_resource type="Script" uid="uid://b6systw05frh0" path="res://core/edge_scroll_camera.gd" id="17_x77df"]
 
 [node name="TinySwords" type="Node" unique_id=498237642]
 
@@ -32,6 +33,22 @@ script = ExtResource("5_x77df")
 config = ExtResource("6_xnhlc")
 game_state = NodePath("..")
 
+[node name="CanvasLayer" type="CanvasLayer" parent="LevelGameState" unique_id=993804078]
+
+[node name="UI" type="Control" parent="LevelGameState/CanvasLayer" unique_id=1299828389]
+layout_mode = 3
+anchors_preset = 0
+
+[node name="CurrencyPanel" parent="LevelGameState/CanvasLayer/UI" unique_id=2000000001 instance=ExtResource("9_cpnl")]
+layout_mode = 1
+
+[node name="GoalsDebugUI" parent="LevelGameState/CanvasLayer/UI" unique_id=1494700185 instance=ExtResource("10_qifrv")]
+layout_mode = 1
+offset_left = 1433.0
+offset_top = 5.0
+offset_right = 1913.0
+offset_bottom = 263.0
+
 [node name="World" type="Node2D" parent="LevelGameState" unique_id=2118297724]
 
 [node name="ForestProps" type="Node2D" parent="LevelGameState/World" unique_id=649424542]
@@ -72,18 +89,6 @@ position = Vector2(105, 920)
 [node name="AlchemyTower" parent="LevelGameState/World" unique_id=51852160 instance=ExtResource("14_hum8s")]
 position = Vector2(1239, 775)
 
-[node name="UI" type="Control" parent="LevelGameState" unique_id=1299828389]
-layout_mode = 3
-anchors_preset = 0
-offset_right = 40.0
-offset_bottom = 40.0
-
-[node name="CurrencyPanel" parent="LevelGameState/UI" unique_id=2000000001 instance=ExtResource("9_cpnl")]
-layout_mode = 1
-
-[node name="GoalsDebugUI" parent="LevelGameState/UI" unique_id=1494700185 instance=ExtResource("10_qifrv")]
-layout_mode = 1
-offset_left = 1433.0
-offset_top = 5.0
-offset_right = 1913.0
-offset_bottom = 263.0
+[node name="Camera2D" type="Camera2D" parent="." unique_id=1494908331]
+offset = Vector2(960, 540)
+script = ExtResource("17_x77df")

docs/museums/edge_scroll_camera.tscn

@@ -0,0 +1,13 @@
+[gd_scene format=3 uid="uid://5vli1vqiqdrl"]
+
+[ext_resource type="Script" uid="uid://b6systw05frh0" path="res://core/edge_scroll_camera.gd" id="1_08uhj"]
+[ext_resource type="Texture2D" uid="uid://bgtt3wu43tajh" path="res://icon.svg" id="2_c5cli"]
+
+[node name="EdgeScrollCamera" type="Node2D" unique_id=1977543223]
+
+[node name="Camera2D" type="Camera2D" parent="." unique_id=455629291]
+script = ExtResource("1_08uhj")
+
+[node name="Icon" type="Sprite2D" parent="." unique_id=629901180]
+position = Vector2(469, 252)
+texture = ExtResource("2_c5cli")