How to drag an object across world space?

Question

C++ / C#

https://pastebin.com/Q3Em5rDj
here is the code where there is some kind of error in OnDrag
why the same coordinate is shown in the debug when calling

Answer 1

Perhaps the problem is that when converting the mouse position to world coordinates, you do not specify z (becomes 0 by default). Accordingly, due to insufficient accuracy, the position in the log is written the same.
https://docs.unity3d.com/ScriptReference/Camera.Sc...
"The z position is in world units from the camera."
You have:
pos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
Input.mousePosition is a Vector2.