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Unreadable white text on white background on Twin Otter GPS

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Unreadable white text on white background on Twin Otter GPS

Postby SurferTim » Sun Aug 11, 2019 10:04 am

Split off from the topic Why is the Ubuntu FlightGear package an older version? that in turn was split of from METAR not working.


SurferTim wrote in Sat Aug 10, 2019 1:06 pm:OK, I had to change to git call a bit to get it to work:
Code: Select all
git clone git://git.code.sf.net/p/flightgear/fgdata


The download_and_compile.sh script needs to be edited to use that call. Otherwise, it will fail.

I am now running 2019.2.0. I'll take a lap around the Caribbean to see how well it works.

It was fun until I tried to use the Garmin GPS. I'm back to V2018.3.1. It is difficult to fly the Twin Otter without the Garmin 196 GPS.

After the upgrade, the text is white on a white background. I'm trying to find where I can select another text color.

Edit: Back to 2019.2.0. Turned off Garmin light, and as long as the GPS is in the shade, I can read it.
Last edited by Johan G on Mon Aug 12, 2019 2:57 pm, edited 1 time in total.
Reason: Split off from the topic "METAR not working". Quote instered for context.
Fly low, fly slow, land on a dime. Twin Otter.
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Re: METAR not working

Postby wkitty42 » Sun Aug 11, 2019 3:11 pm

sounds like the OGSText coloration bug...

james on the dev mailing list; Message-Id: <D3396D2B-0CE6-490E-B32F-42174895B1F4@flightgear.org> wrote:It’s caused by OSG using a shader to render text now, but this bypasses the built-in emissive/diffuse/ambient material properties, which is what our <text> animation uses to set colours of text.

It should happen ‘everywhere’ that a shader is used to render text - Canvas doesn’t care about it since it sets the text color directly.


and this with a tiny bit more of an explanation of the problem... emphasis by me...

james on the dev mailing list; Message-Id: <3C5F07D9-869B-4955-8B71-F7D8691D110D@flightgear.org> wrote:[...] the OSGText one if more that the world is moving forwards, and our text-animation element has not. (Shaders required, can’t rely on OpenGL 1.1 built-in lighting)
"You get more air close to the ground," said Angalo. "I read that in a book. You get lots of air low down, and not much when you go up."
"Why not?" said Gurder.
"Dunno. It's frightened of heights, I guess."
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Re: METAR not working

Postby SurferTim » Sun Aug 11, 2019 3:36 pm

Thanks, wkitty42. That sounds like it. I found where the text is inserted onto the canvas. I can change the size, but not the color (yet).

Only a few colors are affected. I started the Citation-X, and some of the instrument panel text is now white where it once was orange or red.

Edit: I like the new version. The mouse scroll wheel is now intuitive.
Fly low, fly slow, land on a dime. Twin Otter.
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Re: Unreadable white text on white background on Twin Otter

Postby SurferTim » Mon Aug 12, 2019 9:25 pm

Since it has been split off, here is the "new" Garmin display in FG2019.2.0. It is set to go somewhere. You tell me where, and how far.
Image
In the daytime, it is as worthless as tits on a boar hog. Anybody have any idea how to fix this? It was fine in 2018.3.1
Fly low, fly slow, land on a dime. Twin Otter.
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Re: Unreadable white text on white background on Twin Otter

Postby legoboyvdlp » Tue Aug 13, 2019 8:18 am

Definitely looks like OSGText colour, it's nothing to do with FlightGear but with OSG as already said. To fix use FlightGear's own mirror:

https://github.com/zakalawe/osg/tree/fgfs-342-1

And re-compile.
Make sure you use that branch, fgfs-342-1.
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Re: Unreadable white text on white background on Twin Otter

Postby SurferTim » Tue Aug 13, 2019 11:25 am

Nice try, but no cigar. All builds went well, but the Garmin is still unusable.
Fly low, fly slow, land on a dime. Twin Otter.
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Re: Unreadable white text on white background on Twin Otter

Postby legoboyvdlp » Tue Aug 13, 2019 11:44 am

Could you try git remote -v and git branch and tell me the results on the openscenegraph repostiory? Sounds like you still have the wrong one...
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Re: Unreadable white text on white background on Twin Otter

Postby SurferTim » Tue Aug 13, 2019 11:47 am

What version of OSG should show with
apt-cache policy openscenegraph

BTW I downloaded the OSG zip file from the link you posted. Unpacked and followed the instructions. Pretty straightforward.

Edit: Why is this only affecting the Garmin standalone 196 GPS? Nothing else on the panel seems any different than FG2018.3.1.
Fly low, fly slow, land on a dime. Twin Otter.
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Re: Unreadable white text on white background on Twin Otter

Postby legoboyvdlp » Tue Aug 13, 2019 11:58 am

Did you rebuild FlightGear and SimGear with the new OSG?
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Re: Unreadable white text on white background on Twin Otter

Postby SurferTim » Tue Aug 13, 2019 12:02 pm

legoboyvdlp wrote in Tue Aug 13, 2019 11:58 am:Did you rebuild FlightGear and SimGear with the new OSG?

I used
Code: Select all
./download_and_compile.sh FGFS

It appeared to rebuild SIMGEAR and FGFS

I do notice new warning messages on the terminal about "osg::clone"

Edit: Just to repeat my comment above, the only instrument affected on the Twin Otter is the Garmin 196. The rest of the panel looks fine.
Fly low, fly slow, land on a dime. Twin Otter.
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Re: Unreadable white text on white background on Twin Otter

Postby Alant » Tue Aug 13, 2019 1:05 pm

AFAIK, this bug affects other aircraft with glass cockpits.
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Re: Unreadable white text on white background on Twin Otter

Postby SurferTim » Tue Aug 13, 2019 1:23 pm

Alant wrote in Tue Aug 13, 2019 1:05 pm:AFAIK, this bug affects other aircraft with glass cockpits.

OK, a glass cockpit? I'm not familiar with that term.

It has affected a lot of text on the Citation-X panel, but apparently not all.

Any idea how to fix it?
Fly low, fly slow, land on a dime. Twin Otter.
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Re: Unreadable white text on white background on Twin Otter

Postby wkitty42 » Tue Aug 13, 2019 2:58 pm

load up the Zeppelin NT and look at the bottom center console... see if it has all white letters or not...

"glass cockpit" is the new stuff with all/mostly digital instruments...

as for how to fix it, if you are talking about the white letters, as previously noted, you have to build FG with the FG version of OSG or the craft's instrument that is affected has to be rewritten to use canvas and set the color via the canvas methods...
"You get more air close to the ground," said Angalo. "I read that in a book. You get lots of air low down, and not much when you go up."
"Why not?" said Gurder.
"Dunno. It's frightened of heights, I guess."
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Re: Unreadable white text on white background on Twin Otter

Postby Maerchenprinz » Tue Aug 13, 2019 3:01 pm

Hi Tim!

First of all,
Code: Select all
download_and_compile.sh FGFS

compiles flightgear, and
Code: Select all
download_and_compile.sh SIMGEAR

compiles simgear.
Second, a glass cockpit is the opposite of a clock museum :P!

Ciao,
Adrian
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Re: Unreadable white text on white background on Twin Otter

Postby SurferTim » Tue Aug 13, 2019 3:36 pm

I did all that more than once.

There are two ways of getting contrast. One can change the color of the text, or...
Fly low, fly slow, land on a dime. Twin Otter.
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