gd: added input addon

guide_examples/mouse_position_2d/background.gd

@@ -0,0 +1,16 @@
+## This just keeps the sprite endlessly scrolling. It's not related to input.
+extends Sprite2D
+
+
+func _process(delta):
+	# get rect of visible screen in world coordinates
+	var rect = get_viewport().canvas_transform.affine_inverse() * get_viewport_rect()
+	# fit the bg into the viewport
+	global_position = rect.position
+	global_scale =  rect.size / texture.get_size()
+	
+	# update scaling so the texture scales according to zoom level
+	material.set_shader_parameter("scale", global_scale)
+	var offset =  rect.position / texture.get_size()
+	# and offset so we pick a texture offset relative to the movement of the camera
+	material.set_shader_parameter("offset", offset)