- With a pretty good average note of 4.4, Infinity Ops: Online FPS is THE application you need to have. And the 5,000,000 persons who have already install it will tell you the same.
- I d'like to draw as many frames as possible with OpenGL on Mac OS X to measure the performance on different scenes. What I've tried so far: Using a CVDisplayLink that has NSOpenGLCPSwapInterval set to 0, so it does not sync with the Display. But with that it's still stuck at max 60FPS.
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The game update and render loop can average 40 000 cycles and once every few seconds take up to 3X the amount. I know the timing isn't perfectly deterministic, but Casey's version prints 0.033ms/frame very consistently.
I first started with a timer that fires every 1/30 or 1/60 second, but it fluctuates a lot. I thought, maybe the timer isn't accurate, but that wouldn't explain the varying cycles in the game code which only measures the time spend from the beginning to the end of the game update and render loop.
Now that we learned how to start a different thread, I tried running the game on a different thread and as in Windows, do an 'infinite' while loop and adjust the sleep if the game runs too fast than the target ms/frame, but the results are not better, although different.
What's your experience with this? Is this harder to get right on OS X? This seems a trivial issue, so I can't see what I'd be doing wrong.
Note: I run the game at only 640-by-360, to make sure my 2008 laptop should be able to hit a consistent fps.
Is there a good reference to an implementation of a game loop without a timer on OS X?
Casey Muratori is a programmer at Molly Rocket on the game 1935 and is the host of the educational programming series Handmade Hero.
Second, regarding OS X, I would assume that it also always goes through a compositor, so flickering sounds like a strange thing to be seeing. I would suspect that something else might be wrong as well?
- Casey
There's got to be something crucial that I don't get.
What's also weird, is that the tearing happens even when the frame doesn't change. I know how to solve (or rather, minimize) this: by drawing in a separate buffer and right before returning from the gameUpdateAndRender function to the platform layer, copying the pixels from the secondary buffer to the buffer that's passed in the gameUpdateAndRender function as an argument. This buffer is then used to blit to the screen. But it doesn't solve the odd timings, and I don't think I should have to do this.
http://xyproblem.info/
http://www.catb.org/~esr/faqs/smart-questions.html
I'm more concerned about finding out why the timings are so inconsistent, though. The only possible explanation I can think of is some sort of energy savings. Or I do something wrong, which I would prefer, because then I can hopefully find out what.
Casey Muratori is a programmer at Molly Rocket on the game 1935 and is the host of the educational programming series Handmade Hero. Earthtales mac os.
So, I can't really offer much in the way of advice because it's been years since I've done any from-scratch programming on Mac OS X, but I would say the first thing to verify is that you are actually using a system service which guarantees low-latency precision timing. Typically, windowing system timers aren't unless they're specifically labeled as such.
- Casey
A software engineer that enjoys living in enemy territory. Crossfire (itch) (nolski) mac os.
I've looked at CVDisplayLinkRef before, but that's only possible when using OpenGL afaik, and it doesn't help with the timing of the gameUpdate function, I think. It only makes sure the framebuffer flips at the vertical blanking interval, I THINK.
Anyway, thank you everyone for reading my ramblings and suggesting options to try. If I can't solve it, I guess I'll see a possible solution at the end of Handmade Hero. ;)
A software engineer that enjoys living in enemy territory.
CVDisplayLink is a timer that is tied to your screen refresh rate (typically 60Hz), but since you use time deltas in the update code, it doesn't matter if it's a 120Hz screen or a variable refresh rate screen.
I'm seeing that every ~10 frames, the amount of cycles spend in gameUpdateAndRender can be up to 3x during 1 frame, the mystery of this is really what puzzles me the most. Is it possible that this is caused by reference counting? I don't think so, because I thought it should be deterministic as opposed to garbage collection, but I'm not a professional. Furthermore, 3x seems really high and it would make me sad if it's possible that the 3x cycles count every once in a while is caused by reference counting.
A software engineer that enjoys living in enemy territory.
Small off topic question: Now that Swift has support for SIMD, I tried to use it, but __m128i and all the corresponding functions are not declared in my project. I thought it was something I did wrong, but then I found out that __m128i is not supported on ARM, so maybe that's why, and OS X has to wait for proper support. :(
If this is the case: is there a way to reinterpret an integer vector to a float vector without the __m128i type and its functions 'manually'?
What you meant probably is that iOS doesn't support SSE. iOS works on ARM which has NEON intrinsics.
What do you mean reinterpret and integer vector to float vector? Just a cast?
Fps Infinite Mac Os Catalina
http://xyproblem.info/
http://www.catb.org/~esr/faqs/smart-questions.html
The problem is that __m128i is not defined in Swift for some reason (I think because it's not needed for ARM and that's what Apple only cares about.)
Can I just cast it instead of converting it? Or is that semantically different? I guess it wouldn't be enough, though, because there's no equivalent float4 function for every int4 function.
Anything Like FRAPS for Mac?
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