![Confused :?](./images/smilies/icon_confused.gif)
Scaled discs brightness
Forum rules
Please help to make this forum more useful by checking the FAQs before posting! Keep it clean, keep it civil, keep it truthful, stay on topic, be responsible, share your knowledge.
Please help to make this forum more useful by checking the FAQs before posting! Keep it clean, keep it civil, keep it truthful, stay on topic, be responsible, share your knowledge.
-
Topic authorMariusz Kuźmiński
- Posts: 21
- Joined: 02.07.2012
- With us: 12 years 2 months
Scaled discs brightness
Hello, I'm using "scaled discs" mode to render stars, but even with bright textures they seem too dark for me. Is it possible to make them more luminous by change of any parameters? I found buildstardb.pl file, but it contains infos about B-V factor mainly. Maybe any way? ![Confused :?](./images/smilies/icon_confused.gif)
![Confused :?](./images/smilies/icon_confused.gif)
- t00fri
- Developer
- Posts: 8772
- Joined: 29.03.2002
- Age: 22
- With us: 22 years 5 months
- Location: Hamburg, Germany
Re: Scaled discs brightness
Mariusz Ku?mi?ski wrote:Hello, I'm using "scaled discs" mode to render stars, but even with bright textures they seem too dark for me. Is it possible to make them more luminous by change of any parameters? I found buildstardb.pl file, but it contains infos about B-V factor mainly. Maybe any way?
There is a range of star brightness adjustment available via the "[" and "]" keys. I suppose you exploited that option already? (With some knowledge of the sources, it is VERY easy to increase that range)
Are you sure that you did correctly adjust your monitor? There is special software for that depending on your OS.
The scaled disc star model is a very bad approximation to account for the large range of star brightness on typically low-dynamics monitors. Eventually so-called "shader stars" should be implemented, as existing in form of a patch by ChrisL
viewtopic.php?f=10&t=16031&start=0
or as a regular feature in my forthcoming celestia.Sci.
viewtopic.php?f=3&t=16981&start=4
The "shader stars" combine a varying (OGL) pointsize with a (possible) Gaussian halo to increase the renderable range of brightness. Below a certain threshold brightness, stars have no halos. These sophisticated stars are implemented by means of the fast OGL shader technology. Hence the name.
After patching the sources, one needs to recompile, however. There are several discussions about these much better stars in this forum. See the first link and/or use the search engine.
Fridger
-
Topic authorMariusz Kuźmiński
- Posts: 21
- Joined: 02.07.2012
- With us: 12 years 2 months
Re: Scaled discs brightness
Yes, I have tried that adjustment, but it doesn't increase or decrease luminosity of big disc, as seen from small distance. However, I'm looking forward additional features in new Celestiat00fri wrote:There is a range of star brightness adjustment available via the "[" and "]" keys. I suppose you exploited that option already?
![Smile :)](./images/smilies/icon_smile.gif)
- John Van Vliet
- Posts: 2941
- Joined: 28.08.2002
- With us: 22 years
Re: Scaled discs brightness
--- edit ---
Last edited by John Van Vliet on 19.10.2013, 04:37, edited 1 time in total.
- t00fri
- Developer
- Posts: 8772
- Joined: 29.03.2002
- Age: 22
- With us: 22 years 5 months
- Location: Hamburg, Germany
Re: Scaled discs brightness
john Van Vliet wrote:so that there is no confusion
t00fri's Celestia.Sci
is NOT the up and coming Celestia 1.7.0
As far as I can tell there is NO "up and coming Celestia 1.7.0"
while there indeed exists a 1.7.0 branch in SVN
it is a very different fork of celestia
Celestia 1.6.1 is currently the official version
http://www.celestiaproject.net/celestia/download.html
or the current SVN pull is basically 1.7.0
That's correct, and there are NO attempts made yet in the 1.7.0 branch of implementing a satisfactory rendering of stars.
Fridger