Have mouse wheel cycle through hotbar

project/blocky_game/gui/hotbar.gd

@@ -20,6 +20,7 @@ func _ready():
 func select_slot(i: int):
 	if _inventory_index == i:
 		return
+	assert(i >= 0 and i < len(_inventory))
 	_inventory_index = i
 	
 	var block_id = _inventory[_inventory_index]
@@ -42,3 +43,19 @@ func try_select_slot_by_block_id(block_id: int):
 		if id == block_id:
 			select_slot(i)
 			break
+
+
+func select_next_slot():
+	var i = _inventory_index + 1
+	if i >= len(_inventory):
+		i = 0
+	select_slot(i)
+
+
+func select_previous_slot():
+	var i = _inventory_index - 1
+	if i < 0:
+		i = len(_inventory) - 1
+	select_slot(i)
+
+

project/blocky_game/player/avatar_camera.gd

@@ -0,0 +1,74 @@
+extends Spatial
+
+export var sensitivity = 0.4
+export var min_angle = -90
+export var max_angle = 90
+export var capture_mouse = true
+export var distance = 0.0
+
+var _yaw = 0
+var _pitch = 0
+var _offset = Vector3()
+
+
+func _ready():
+	_offset = get_translation()
+	if capture_mouse:
+		Input.set_mouse_mode(Input.MOUSE_MODE_CAPTURED)
+
+
+func _unhandled_input(event):
+	if event is InputEventMouseButton:
+		if event.pressed and Input.get_mouse_mode() != Input.MOUSE_MODE_CAPTURED:
+			if capture_mouse:
+				# Capture the mouse
+				Input.set_mouse_mode(Input.MOUSE_MODE_CAPTURED)
+		
+		# The game uses the wheel already, put that "debug" adjustment behind a modifier
+		if event.control:
+			if event.button_index == BUTTON_WHEEL_UP:
+				distance = max(distance - 1 - distance * 0.1, 0)
+				update_rotations()
+			
+			elif event.button_index == BUTTON_WHEEL_DOWN:
+				distance = max(distance + 1 + distance * 0.1, 0)
+				update_rotations()
+	
+	elif event is InputEventMouseMotion:
+		if Input.get_mouse_mode() == Input.MOUSE_MODE_CAPTURED || not capture_mouse:
+			# Get mouse delta
+			var motion = event.relative
+			
+			# Add to rotations
+			_yaw -= motion.x * sensitivity
+			_pitch += motion.y * sensitivity
+			
+			# Clamp pitch
+			var e = 0.001
+			if _pitch > max_angle-e:
+				_pitch = max_angle-e
+			elif _pitch < min_angle+e:
+				_pitch = min_angle+e
+			
+			# Apply rotations
+			update_rotations()
+	
+	elif event is InputEventKey:
+		if event.pressed:
+			if event.scancode == KEY_ESCAPE:
+				# Get the mouse back
+				Input.set_mouse_mode(Input.MOUSE_MODE_VISIBLE)
+			
+			elif event.scancode == KEY_I:
+				var pos = get_translation()
+				var fw = -transform.basis.z
+				print("Position: ", pos, ", Forward: ", fw)
+
+
+func update_rotations():
+	set_translation(Vector3())
+	set_rotation(Vector3(0, deg2rad(_yaw), 0))
+	rotate(get_transform().basis.x.normalized(), -deg2rad(_pitch))
+	set_translation(get_transform().basis.z * distance + _offset)
+
+

project/blocky_game/player/avatar_interaction.gd

@@ -111,6 +111,10 @@ func _unhandled_input(event):
 					_action_place = true
 				BUTTON_MIDDLE:
 					_action_pick = true
+				BUTTON_WHEEL_DOWN:
+					_hotbar.select_next_slot()
+				BUTTON_WHEEL_UP:
+					_hotbar.select_previous_slot()
 
 	elif event is InputEventKey:
 		if event.pressed:

project/blocky_game/player/character_avatar.tscn

@@ -1,7 +1,7 @@
 [gd_scene load_steps=8 format=2]
 
 [ext_resource path="res://blocky_game/player/character_controller.gd" type="Script" id=1]
-[ext_resource path="res://common/mouse_look.gd" type="Script" id=2]
+[ext_resource path="res://blocky_game/player/avatar_camera.gd" type="Script" id=2]
 [ext_resource path="res://blocky_game/player/avatar_interaction.gd" type="Script" id=3]
 [ext_resource path="res://blocky_terrain/crosshair.png" type="Texture" id=4]
 [ext_resource path="res://blocky_terrain/center.gd" type="Script" id=5]
@@ -23,7 +23,7 @@ near = 0.1
 far = 500.0
 script = ExtResource( 2 )
 sensitivity = 0.3
-distance = 4.0
+distance = 0.0
 
 [node name="Interaction" type="Node" parent="."]
 script = ExtResource( 3 )