added zoom

src/World.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=15 format=2]
+[gd_scene load_steps=16 format=2]
 
 [ext_resource path="res://Tilesets/stone.png" type="Texture" id=1]
 [ext_resource path="res://Tilesets/dirt.png" type="Texture" id=2]
@@ -7,6 +7,7 @@
 [ext_resource path="res://NPCs/ooze.tscn" type="PackedScene" id=5]
 [ext_resource path="res://NPCs/moss.tscn" type="PackedScene" id=6]
 [ext_resource path="res://Audio/Background/cave.ogg" type="AudioStream" id=7]
+[ext_resource path="res://camera.gd" type="Script" id=8]
 
 [sub_resource type="ConvexPolygonShape2D" id=1]
 points = PoolVector2Array( 0, 0, 8, 0, 8, 8, 0, 8 )
@@ -136,6 +137,13 @@ points = PoolVector2Array( 0, 0, 8, 0, 8, 8, 0, 8 )
 
 [node name="World" type="Node2D"]
 
+[node name="Camera2D" type="Camera2D" parent="."]
+position = Vector2( 40, 32 )
+current = true
+script = ExtResource( 8 )
+
+[node name="Tween" type="Tween" parent="Camera2D"]
+
 [node name="TileMap" type="TileMap" parent="."]
 tile_set = SubResource( 7 )
 cell_size = Vector2( 8, 8 )

src/camera.gd

@@ -0,0 +1,41 @@
+extends Camera2D
+
+# Lower cap for the `_zoom_level`.
+export var min_zoom := 0.5
+# Upper cap for the `_zoom_level`.
+export var max_zoom := 2.0
+# Controls how much we increase or decrease the `_zoom_level` on every turn of the scroll wheel.
+export var zoom_factor := 0.1
+# Duration of the zoom's tween animation.
+export var zoom_duration := 0.2
+
+# The camera's target zoom level.
+var _zoom_level := 1.0 setget _set_zoom_level
+
+# We store a reference to the scene's tween node.
+onready var tween: Tween = $Tween
+
+func _set_zoom_level(value: float) -> void:
+	# We limit the value between `min_zoom` and `max_zoom`
+	_zoom_level = clamp(value, min_zoom, max_zoom)
+	# Then, we ask the tween node to animate the camera's `zoom` property from its current value
+	# to the target zoom level.
+	tween.interpolate_property(
+		self,
+		"zoom",
+		zoom,
+		Vector2(_zoom_level, _zoom_level),
+		zoom_duration,
+		tween.TRANS_SINE,
+		# Easing out means we start fast and slow down as we reach the target value.
+		tween.EASE_OUT
+	)
+	tween.start()
+
+func _unhandled_input(event):
+	if event.is_action_pressed("zoom_in"):
+		# Inside a given class, we need to either write `self._zoom_level = ...` or explicitly
+		# call the setter function to use it.
+		_set_zoom_level(_zoom_level - zoom_factor)
+	if event.is_action_pressed("zoom_out"):
+		_set_zoom_level(_zoom_level + zoom_factor)

src/project.godot

@@ -37,6 +37,19 @@ window/stretch/mode="2d"
 
 singletons=[  ]
 
+[input]
+
+zoom_in={
+"deadzone": 0.5,
+"events": [ Object(InputEventMouseButton,"resource_local_to_scene":false,"resource_name":"","device":0,"alt":false,"shift":false,"control":false,"meta":false,"command":false,"button_mask":0,"position":Vector2( 0, 0 ),"global_position":Vector2( 0, 0 ),"factor":1.0,"button_index":4,"pressed":false,"doubleclick":false,"script":null)
+ ]
+}
+zoom_out={
+"deadzone": 0.5,
+"events": [ Object(InputEventMouseButton,"resource_local_to_scene":false,"resource_name":"","device":0,"alt":false,"shift":false,"control":false,"meta":false,"command":false,"button_mask":0,"position":Vector2( 0, 0 ),"global_position":Vector2( 0, 0 ),"factor":1.0,"button_index":5,"pressed":false,"doubleclick":false,"script":null)
+ ]
+}
+
 [physics]
 
 common/physics_fps=5