There is a template on the canvas wiki - http://wiki.flightgear.org/Canvas_HUD, which I have used. The Nasal code is quite simple and hardly needs explaining.
The symbology that I needed is not hard-coded into the existing (flightgear/src/Instrumentation/HUD/) and I had been putting off doing that job, until the canvas HUD suddenly appeared. My HUD is that used on the TSR2 and was a development of the even more basic HUD fitted to early Buccaneers. I spent many, many hours behind this HUD in the simulator at Weybridge. The TSR2 is still very much in development, and I am currently replacing a very unstable Datcom based FDM with CFD derived data. You can preview it at g...@gitorious.org:fg-ajt/tsr2.git. The main differences between the TSR2 and later HUDs are the flight director and the pitch gearing. The flight director was named "highway in the sky" and looks like a runway pattern. You fly the vanishing point of the runway to the central circle of the HUD. The HUD is not geared 1 to 1 in pitch. This sounds quite wrong, but the gearing is similar to that of the head-down artificial horizon, which pilots are quite accustomed to. Once I get an attack computer built up, there is simple symbology for that also. To "fly" the TSR2, use the idiot start button (as with the Lightning). Select one notch of flap. With the autopilot menu-bar (F11) select the take-off flight director. When the engines are running open up full and follow the director signal. It should demand rotation at 160 kts. Keep manoeuvres small, otherwise the present FDM will soon get unstable. Also keep a close eye on airspeed as the minimum drag speed is quite high and therefore it is speed unstable. In short the canvas HUD is very simple to program. Alan -----Original Message----- From: James Turner Sent: Monday, November 05, 2012 3:11 PM To: FlightGear developers discussions Subject: Re: [Flightgear-devel] Simgear/ShivaVG compile fails on windows On 5 Nov 2012, at 13:50, Alan Teeder wrote: > Yes - it all compiles and runs again. And my canvas HUD (in development) > still works! Can you talk a little about the Canvas HUD? Moving the HUD to use the Canvas would be a great step from my point of view, since it and 2D panels (which I am happy to write the convert for!) are the last places besides the UI which make raw OpenGL calls, and hence would benefit from moving to the Canvas (and thus, to use OSG internally) James ------------------------------------------------------------------------------ LogMeIn Central: Instant, anywhere, Remote PC access and management. Stay in control, update software, and manage PCs from one command center Diagnose problems and improve visibility into emerging IT issues Automate, monitor and manage. Do more in less time with Central http://p.sf.net/sfu/logmein12331_d2d _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel ------------------------------------------------------------------------------ LogMeIn Central: Instant, anywhere, Remote PC access and management. Stay in control, update software, and manage PCs from one command center Diagnose problems and improve visibility into emerging IT issues Automate, monitor and manage. Do more in less time with Central http://p.sf.net/sfu/logmein12331_d2d _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
