Read canvas image by HTTP
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This article is under construction currently!
Important Note
The feature described in this article is not part of the FlightGear distribution and requires to build FlighGear from source.
Objective
There are situations, eg. for cockpit builders, where it is useful to display instruments like PD, ND, Eicas externally from the FlightGear 3D main window in a separate window or on a separate monitor. Many of these instruments are created by Canvas internally. This article provides a patch to FlightGear for downloading any canvas image from a running FlightGear process by HTTP.
Status (10/2016)
This feature was created based on version 2016.3.1. It works so far. However, there are latencies and this solution isn't efficient. Just creating the PNG image from OSG takes up to 100ms.
Building
- Download and extract the attached tar archive
- Copy the simgear and flightgear