gd: added input addon

addons/guide/modifiers/guide_modifier_canvas_coordinates.gd

@@ -0,0 +1,35 @@
+## Converts a position input in viewport coordinates (e.g. from the mouse position input)
+## into canvas coordinates (e.g. 2D world coordinates). Useful to get a 2D 'world' position.
+@tool
+class_name GUIDEModifierCanvasCoordinates
+extends GUIDEModifier
+
+## If checked, the input will be treated as relative input (position change)
+## rather than absolute input (position).
+@export var relative_input:bool:
+	set(value):
+		relative_input = value
+		emit_changed()
+
+func _modify_input(input:Vector3, delta:float, value_type:GUIDEAction.GUIDEActionValueType) -> Vector3:
+	if not input.is_finite():
+		return Vector3.INF
+		
+	var viewport = Engine.get_main_loop().root
+	var transform = viewport.canvas_transform.affine_inverse()
+	var coordinates = transform * Vector2(input.x, input.y)
+	
+	if relative_input:
+		var origin = transform * Vector2.ZERO
+		coordinates -= origin
+	 
+	return Vector3(coordinates.x, coordinates.y, input.z)
+
+
+func _editor_name() -> String:
+	return "Canvas coordinates"
+
+
+func _editor_description() -> String:
+	return "Converts a position input in viewport coordinates (e.g. from the mouse position input)\n" + \
+		"into canvas coordinates (e.g. 2D world coordinates). Useful to get a 2D 'world' position."