We added some self-defined vehicles (in obj format) into X-Plane 10 model base, like some tanks. Then we want to control the patrol route of these vehicles through the UDP protocol. The X-Plane UDP reference points out that the OBJL data structure should be used, see below.
![](https://questions.x-plane.com/?qa=blob&qa_blobid=7353439720133096094)
However, how to specify the xint parameter to select a specific vehicle?![smiley smiley](https://questions.x-plane.com/qa-plugin/wysiwyg-editor/ckeditor/plugins/smiley/images/regular_smile.png)