Celestia 1.7.0 Development Thread

[onetwothree]

I've been saying this for months.

And never provided "Help->OpenGL info" output

[john71]

Sorry, you are right. Here it is.

OpenGL version: 4.6.0 NVIDIA 430.86
Renderer: GeForce GTX 1050 Ti/PCIe/SSE2
GLSL Version: 4.60 NVIDIA
Maximum texture size: 32768

Code: Select all

Extensions:
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[onetwothree]

So we can drop possibility that you accidentally use software GL.

@john71 could you share your dataset so I can use it for testing?

It *seems* that qt version also has small lags on GNU/Linux.

[john71]

Sorry, what kind of dataset are we talking about?

[onetwothree]

Sorry, what kind of dataset are we talking about?

You said you have a planet with cities and spacecrafts and with this planet shown you have 60 fps in native win version and about 30-35 in qt one.

[john71]

You can recreate the problem easily: use the 64k Earth textures (surface, bump, cloud, night etc.), copy the Earth data to create 3 identical Jupiter moons (SemiMajorAxis 1, 1.5 and 2 million kilometers) and experiment with it. My whole star system is 21GB, so I cannot share it.

Added after 4 minutes 36 seconds:
In my opinion Celestia will not be able to deal with GAIA data sets if the QT version will have this problem.

Added after 7 minutes 23 seconds:
You can use 100000, 200000, 300000 km SemiMajorAxis too.

[pirogronian]

In my opinion Celestia will not be able to deal with GAIA data sets if the QT version will have this problem.

From Your description, this problem concerns planets, moons and 3d models, not stars.

[john71]

From Your description, this problem concerns planets, moons and 3d models, not stars.

In my opinion it is not a direct OpenGL or graphic card problem, it is an internal data handling deficiency, caused by many-many GBs of ssc, stc and texture, mesh data.

So I hope it won't effect the handling of the 90 GB GAIA data.

[RebelCoder]

Guys, would you mind creating an AppImage for Linux so we don't have to play around with libraries and to avoid Celestia being removed from all Linux distros like it is now, because of outdated library usage ?

[pirogronian]

would you mind creating an AppImage for Linux

I guess no. We already have installation infrastructure for Linux, Win and Mac. If You wish special Linux-only way, feel free to implement it and share.

[selden]

FWIW, I used only the contents of the zip provided by Janus, with no additional catalog files. I let Celestia take the viewpoint to Earth and then rotated the viewpoint around the planet using the mouse. The QT refresh rate seemed to be 1/4 the speed of the VS version, or perhaps even slower.

[onetwothree]

The QT refresh rate seemed to be 1/4 the speed of the VS version, or perhaps even slower.

Do you have actual numbers (press `)?

[john71]

FWIW, I used only the contents of the zip provided by Janus, with no additional catalog files.

[selden]

Do you have actual numbers (press `)?

Sorry, but I don't have that information. Unfortunately, Celestia's FPS display claims 60.0, which is obviously false. FPS evidently does not get recalculated appropriately when I continuously rotate the viewpoint around the planet using the mouse. I seem to recall that FPS used to be calculated as a "running average" over several seconds. I don't know if that's still the case.

FWIW, the menu option Display/ FPS Control is set to Auto.

@john71, I don't know what you are trying to say with the "chin scratching" emoticon.

[john71]

@john71, I don't know what you are trying to say with the "chin scratching" emoticon.

My dilemma is this: you experienced the same lagging problem, but you did not have a lot of addons eating up the resources.

So it seems that the problem is not a data handling error, it is another kind of bug.

In other words I thought that large textures and meshes are causing the lagging problem, but it seems that QT produces the same lagging problem regardless of the quantity of addons, textures and meshes.

AND that is strange.

[Janus]

I see a possible miscommunication.
So in order to be sure everyone is talking about the same thing, try these.

The archive contains three things.
All compiled from the same copy of the 5547 sourcecode.
The previous QT version of celestia which uses QT 5.13.0, for continuity testing.
A recompile of that with a hard coded FPS counter added.
A recompiled VS static linked version as well.

The new FPS counter is yellow and located in the lower left a ways above the corner.

I added this to celestiacore.cpp:3464

Code: Select all

   glPushMatrix();
   glTranslatef(0.0f, (float)(fontHeight * 7 + 5), 0.0f);
   glColor4f(1.0f, 1.0f, 0.0f, 0.75f);
   overlay->beginText();
   *overlay << '\n';
   fmt::fprintf(*overlay, _("Current FPS: %.1f\n"), fps);
   overlay->endText();
   glPopMatrix();


Yes, this is copied and modified from the regular FPS display code.
The color can be changed quite easily if needed, I chose yellow since it contrasted.
The regular FPS display is undisturbed.

Janus.

[selden]

I still see the same slowness symptoms when using Celestia_QT5130_FPS.exe

For example: after letting Celestia start and take the viewpoint to the default location near the Earth, when I use the Left-Mouse-Button Drag to move the Earth back and forth, I see the Earth jump from one position to another in Celestia's window. Its position seems to update approximately 4 times per second. The yellow FPS number stays near 60 fps, sometimes dropping to 59.9 or 59.8.

I turned off various display features and reduced the Earth's surface texture resolution to "Low". They made no difference.

When I do the same LMB drag with celestia-x64-FPS, the Earth moves smoothly. As with the QT version, the yellow FPS number stays near 60 fps, sometimes dropping to 59.9 or 59.8.

FWIW, here's a framegrab, not that it really provides much information.

QT poor framerate

[Markerz]

the macOS version of Celestia is long obsolete, so I start (almost fresh) new in Swift to get it running, seems to be working alright, a lot needs to be done but still. can anyone distribute on public platforms?

[onetwothree]

the macOS version of Celestia is long obsolete, so I start (almost fresh) new in Swift to get it running, seems to be working alright, a lot needs to be done but still. can anyone distribute on public platforms?

We are waiting for your pull request!

[Markerz]

the macOS version of Celestia is long obsolete, so I start (almost fresh) new in Swift to get it running, seems to be working alright, a lot needs to be done but still. can anyone distribute on public platforms?

We are waiting for your pull request!

it will be a fairly big pr if it happens. what i was actually asking is the possibility to distribute the binary on platforms like mac app store etc.