@TwistedTwigleg said:
You can use a Line2D node, and then move it around by altering its global_position so it follows the mouse's global position. You may need to do some minor amounts of additional processing to account for the offset of the mouse position and the Line2D node's origin, but it should be doable.
Ye, that shound good, but another questions is how to detect the user click on the line.The Process in my mind is :when left mouse button just_pressed, if mouse position in the line area , i will move line follow the mouse position. But I don’t know how to detect whether the point is in the line area. create a CollisionPolygon2D around the line ? what polygon the collision need
