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c172p-team / c172p

A high detailed version of the Cessna 172P aircraft for FlightGear
GNU General Public License v2.0
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Port 196 GPS to Canvas #662

Open onox opened 8 years ago

onox commented 8 years ago

A second 196 has been added (black instead of white) with an empty screen. Go to Models/c172p.xml and unhide the Canvas model. After that add an actual Canvas implementation.

For the implementation, you might want to use Nasal/canvas/MFD_Generic.nas from FGDATA.

See #392 for the discussion and https://github.com/Juanvvc/c172p-detailed/issues/392#issuecomment-162254682 for some bugs in the old non-Canvas version.

gilbertohasnofb commented 4 years ago

@stuartbuchanan wrote me in an email:

I don't know if I raised this before, but the Garmin 196 model is very expensive and slows down start times a lot - it adds around 10 seconds to the start time on my machine. Is it still useful, or should we perhaps retire it or replace it with the Canvas version?

@wlbragg @legoboyvdlp @dany93 @onox @Juanvvc @wkitty42 Does anyone know about the state of the canvas version of the Garmin 196? I think last time I checked it was not functional or was less functional than the non-canvas version, which is what we used.

wkitty42 commented 4 years ago

On 4/1/20 5:23 PM, Gilberto Agostinho wrote:

@wlbragg @legoboyvdlp @dany93 @onox @Juanvvc @wkitty42 Does anyone know about the state of the canvas version of the Garmin 196? I think last time I checked it was not functional or was less functional than the non-canvas version, which is what we used.

i have no clue on the state of the canvas version... i'm not sure if there is any slow down with the current one or not... i've only gotten it out and powered it on for a play a couple of times... since i generally run a debug build of FG, everything is slower than normal... sorry...

stuartbuchanan commented 4 years ago

Hi Folks,

What would the impact be of removing the 196 completely?

Do we think anyone actually uses it in the simulator? It's a very old piece of technology, and I suspect that people just use a moving map instead if they want a GPS.

-Stuart

gilbertohasnofb commented 4 years ago

I think there are some people using it, there are a couple of hits when I search the forum for "c172p gps" or "172 gps" or similar things. But if the impact in performance is so big, that might be something to be considered. Stuart, is the impact only on load times or also in the performance in the sim without engabling the GPS?

wlbragg commented 4 years ago

Stuart, is the impact only on load times or also in the performance in the sim without enabling the GPS?

Yes, I would want to know the answer to that question as well.

It's been so long since we looked at using the Canvas GPS I don't remember why it wasn't used initially. Seems to me it wasn't complete or maybe waiting on some canvas helpers that were not yet created?

Is there any working "canvas" 196 to use as a guide for hooking it up?

stuartbuchanan commented 4 years ago

Hi Folks,

On my system I perhaps see a 1fps drop as well as the load time impact. But that's with a fairly big graphics card (GTX 1660). It would be worth testing with other systems as well I think.

I've no idea if there's an alternative 196 implementation.

Unfortunately there's no simple way to make it completely optional without creating a new -set.xml file and a new model file. :(

-Stuart

On Sun, Apr 5, 2020 at 2:43 AM wlbragg notifications@github.com wrote:

Stuart, is the impact only on load times or also in the performance in the sim without enabling the GPS?

Yes, I would want to know the answer to that question as well.

It's been so long since we looked at using the Canvas GPS I don't remember why it wasn't used initially. Seems to me it wasn't complete or maybe waiting on some canvas helpers that were not yet created?

Is there any working "canvas" 196 to use as a guide for hooking it up?

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wlbragg commented 4 years ago

Right, I had to do that with the FG1000 in the J3Cub as you can't remove the overhead without completely removing include commands. I suppose we could make one more .set that includes the GPS as is and remove it from all the other variants. Basically make the GPS equipped aircraft a variant? What is the overhead, nasal? What about on-demand nasal loading, would that be possible?

gilbertohasnofb commented 4 years ago

@wlbragg I think using multiple set files is a good choice, from what I could see in the forum a few people (though not many) use the GPS, so it would be a pity for those users to lose functionality. But the difference in performance might be really welcomed by the majority of users, so I think this is worth it.