Firstly, thanks for the continued support with such a large update. I'm still trying to unpack all the changes made and better understand them. Hopefully,someone will be able to assist me in optimizing the simulation.
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A while back, I asked a question regarding the interrelationship of FPS, PHYS rate, Step, and accuracy-- it was explained to me why Vsync OFF would result in a more accurate simulation at the cost of utilizing more processing power.
http://universesandbox.com/forum/index.php/topic,17193.0.html-With the update, I've noticed a few strange issues regarding the same topic.
Here is my original data pre version 20Solar System Sim (default)
Default time step of 15 days/second
Vsync OFF: FPS- approx. 240 fps PHYS- approx 930, 1 step
Simulation Error: .05 m/s- .25 m/s
Tolerance: 11.4 million km
Vsync ON: FPS- 60 PHYS- 623, 1 step
Simulation Error: .9 m/s- 4.0 m/s
Tolerance: same as above
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Update 20 dataVsync OFF: FPS- 200fps PHYS: 1090, 1 step
Simulation Error: .08 m/s-0.4 m/s
Tolerance: 11.3 million km- 11.6km
Note:High Performance enabled in Windows-- no noticeable change
Vsync ON: FPS:60 PHYS: 500-1000 (oscillating), 1 step
Simulation Error: 0.9-4.0 m/s
Tolerance: 11 million km - 11.8 million km
Note:when I enable "high performance" in windows power options PHYS stabilizes at approx
1140*this never affected my sim in this way before,
and the PHYS rate is double what it was before at 60fps
Now, the PHYS rate is unaffected by Vsync, yet sim error is... ?
So, given this info: 1. Did something change with the code or logic behind n-body calcs that would explain why at 60FPS my PHYS rate is now double what it was before?
2. Any idea why the standard Windows 10 'balanced mode' (cpu is allowed to declock) would cause such fluctuations in the PHYS rate?
3. I noticed that 'sub stepping' is now an option, and it is disabled by default. I recall this automatically occurring when it was needed. Why the change?
unrelated:
4. Do the yields given when one mouses over a star with "explode" have any true effect now? (i.e., transfer a greater amount of heat to nearby bodies, greater velocity or magnetic effects? Different physical effects of a type Ia and type II?
5. Does a planet's magnetic field have any protective effects against solar winds yet, or any climate/atmospheric effects?
6. I noticed my FPS and other numbers are a bit lower with this update. Just running the basic solar system sim without making changes, has the game become a bit more demanding? Any more reliance on GPU?
Thanks in advance
cavok84