GDScript

The GDExtension offers partial bindings for GDScript. If there's an ImGui feature you want which isn't available in GDScript, please submit an issue.

Where the ImGui API uses pointers to pass a single variable by reference, the GDScript bindings use one-element arrays, similar to the progress parameter in ResourceLoader.load_threaded_get_status.

For example:

var mynum := [42]

func _process(_delta):
    ImGui.Begin("window name")
    ImGui.DragInt("my number", mynum)
    ImGui.Text("number = %d" % mynum[0])
    ImGui.End()

TODO: link example