Global Position property for InputEventScreenTouch

[IDGCaptainRussia94]

It would be a good addition if the event InputEventScreenTouch returned a global position property similar to get_global_mouse_position, as such I would suggest a built-in method for getting the touch position in the world, rather than having to use hacky solutions like this to get it from screen space.

[timothyqiu]

Note that position is not the global position. It's in viewport coordinate, i.e., global position plus canvas transform.

Also in 4.x, you can do

• event.position * get_canvas_transform() to get global position
• event.position * get_global_transform_with_canvas() to get local position