Faithful user and subscriber here.  Here's the problem:

I have a laptop, 17" screen, 1920x1080 native at 100% scaling.

I have a 24" monitor at my desk, same resolution and scaling.  I go back and forth from the desk monitor to my laptop several times a day and I game on both.  I noticed my sensitivity feels different between the two monitors.

My G900 is at 1500 DPI, which I do not adjust as I normally have no need to.

I would like an option in the calculator to set the same game, same CPI, and different monitor sizes to tell me what to set the sensitivity to in order to maintain the same perceived sensitivity in the game.  Or, even better, tell me what CPI I can change to for the same result.  Then I would just create a new mouse profile for when I switch between screens.

Any chance?

Edited August 19, 20187 yr by stylusNC

I agree. I personally scale my CPI according to screen size.

In your case (assuming both are 1920x1080), you want 1500 on the 24" and 2100 on the 17". Or if you want it the other way around, 1500 on the 17", 1050 on the 24".

 

Math used:

(1500 * 24 * sqrt(1920^2+1080^2))/(17 * sqrt(1920^2+1080^2)) = 2117.647  (2100)

(1500 * 17 * sqrt(1920^2+1080^2))/(24 * sqrt(1920^2+1080^2)) = 1062.5  (1050)

This is coming the next version

Awesome.

Games on different monitors require different sensitivities, and also custom resolutions with black bars (simulating a smaller monitor). For example, with 1920x1080, CSGO has a focal length of 720 pixels. If you put Overwatch into a custom resolution of 1810x1018 with no scaling (black bars all around), the game will still have 70.53 vfov and 103 hfov, but the focal length will be 719.9 px, pretty much the same as CSGO. It's like CSGO with black paper all around the screen. In this case, Overwatch should have the same cm/360° as CSGO, despite the FOV values being different. So monitor size is definitely a needed variable.

 

https://teacher.desmos.com/activitybuilder/custom/5a61dd34fafbd40a25416e02#preview/d123ef39-8694-4760-af7d-c18c936ce79d

https://www.reddit.com/r/Competitiveoverwatch/comments/5y6c51/to_make_overwatchs_fov_feel_like_cs_play_in/

 

Edited August 18, 20187 yr by Drimzi

2 hours ago, Drimzi said:

Awesome.

Games on different monitors require different sensitivities, and also custom resolutions with black bars (simulating a smaller monitor). For example, with 1920x1080, CSGO has a focal length of 720 pixels. If you put Overwatch into a custom resolution of 1810x1018 with no scaling (black bars all around), the game will still have 70.53 vfov and 103 hfov, but the focal length will be 719.9 px, pretty much the same as CSGO. It's like CSGO with black paper all around the screen. In this case, Overwatch should have the same cm/360° as CSGO, despite the FOV values being different. So monitor size is definitely a needed variable.

 

https://teacher.desmos.com/activitybuilder/custom/5a61dd34fafbd40a25416e02#preview/d123ef39-8694-4760-af7d-c18c936ce79d

https://www.reddit.com/r/Competitiveoverwatch/comments/5y6c51/to_make_overwatchs_fov_feel_like_cs_play_in/

 

That Desmos link is awesome, you can visualize all the variables

19 hours ago, DPI Wizard said:

This is coming the next version

AWESOME, THANK YOU!!

On 8/17/2018 at 7:18 PM, Drimzi said:

I agree. I personally scale my CPI according to screen size.

In your case (assuming both are 1920x1080), you want 1500 on the 24" and 2100 on the 17". Or if you want it the other way around, 1500 on the 17", 1050 on the 24".

 

Math used:

(1500 * 24 * sqrt(1920^2+1080^2))/(17 * sqrt(1920^2+1080^2)) = 2117.647  (2100)

(1500 * 17 * sqrt(1920^2+1080^2))/(24 * sqrt(1920^2+1080^2)) = 1062.5  (1050)

And you, sir, are awesome as well.  Thank you for the interim solution!

what about using a 27 zoll monitor with res 1920x1200 and go to a 24.5 zoll res 1920x1080? With a dpi of 800 is the math the same?

Edited August 20, 20187 yr by Quackerjack

13 hours ago, Quackerjack said:

what about using a 27 zoll monitor with res 1920x1200 and go to a 24.5 zoll res 1920x1080? With a dpi of 800 is the math the same?

Yes just substitute the numbers.

 

(800 * 27 * sqrt(1920^2+1080^2))/(24.5 * sqrt(1920^2+1200^2)) = 857.78.. (850)

 

Since the 24.5" monitor has denser/smaller pixels, the real-world distance that the cursor moves is lower, and thus needs 850 CPI to feel like before.

Edited August 21, 20187 yr by Drimzi

but if u use difference resolutions the math doesnt work anymore right?

 

ex.: 24 zoll 1600x900 to 24.5 zoll 1920x1080

 

(800 * 24 * sqrt(1920^2+1080^2))/(24.5 * sqrt(1600^2+900^2)) =940

 

Edited August 22, 20187 yr by Quackerjack

That math is still right, 940 is correct.

Why is it resolution dependent (same aspect ratio)? Surely that just changes the detail contained within the 24 inch screen but not anything else?

1 hour ago, Skidushe said:

Why is it resolution dependent (same aspect ratio)? Surely that just changes the detail contained within the 24 inch screen but not anything else?

thats also my thought.  24 zoll to 24.5 zoll with a dpi of 800 jumps up to 940, doesnt seems right

4 minutes ago, Quackerjack said:

thats also my thought.  24 zoll to 24.5 zoll with a dpi of 800 jumps up to 940, doesnt seems right

To keep the cursor movement the same. If you go from 1920x1080 to 3840x2160 and the monitor size is the same, you need to double your DPI for the movement to be the same. For games resolution doesn't matter, but using the cursor in-game can be a pain if you don't account for this.

i thought sensitivity is undepented from resolution. So that says we also have to calaculate the res in.

4 minutes ago, Quackerjack said:

i thought sensitivity is undepented from resolution. So that says we also have to calaculate the res in.

Sensitivity in games are unaffected by resolution, but the cursor (like when using menus or managing inventory in PUBG) are affected by the resolution (since 1 count = 1 pixel). Some games do have a dedicated cursor sensitivity, but they are fairly uncommon. 

aha so if i change monitor size and or res the sensitivity in a game is the same i dont have to compensate something. Its just that the mouse speed on desktop or like u said in menus is different

1 minute ago, Quackerjack said:

aha so if i change monitor size and or res the sensitivity in a game is the same i dont have to compensate something. Its just that the mouse speed on desktop or like u said in menus is different

Correct, unless you also want to compensate for the size change in sensitivity. By this I mean if you overlay the old size over the new, the sensitivity in the old size portion stays the same, and if the new monitor is bigger it will require more movement to reach the edge.

 

so ur advice? compensate or not?

Just now, Quackerjack said:

so ur advice? compensate or not?

I'm honestly not sure. If it's a question about how much of your vision the monitor takes up, the distance to your monitor should be considered as well.

But personally I don't feel the sensitivity being wrong if I move 50 cm back or forth, which has a lot more impact on the apparent size than a few inches of increased monitor size.

I'll add the function to the next release though (not with distance to the monitor, but with monitor size), but it's probably not suitable for everyone.

In my experience, it is just the size that matters (lol). The amount of space that the monitor occupies in your vision hardly matters, like you can't make a small screen feel like a large screen by moving it closer as the depth is different.

58 minutes ago, Drimzi said:

In my experience, it is just the size that matters (lol). The amount of space that the monitor occupies in your vision hardly matters, like you can't make a small screen feel like a large screen by moving it closer as the depth is different.

I feel the exact same way. My goal is to add something like one option to compensate for AR and one for size that you can turn on or off.

Both off is like the calculator is today, with the slight drawback that say converting from 4:3 to 16:9 using monitor distance 100% means the edge of 4:3 will be matched to the edge of 16:9. On the plus side this means that converting using stretched resolutions works fine.

Compensating for AR means 100% on 4:3 will match 75% on 16:9.

Adjusting for size will be based on PPI.

I understand that if this change makes the cursor feel the same across games and desktop, but you not need to then need to decrease your in-game sensitivity by the same factor you increased your dpi by otherwise your cm/360 would change? Or am I missing something... Also, what is the term AR?

 

23 minutes ago, Skidushe said:

 Also, what is the term AR?

Aspect Ratio, the proportional relationship between your monitor and/or resolutions width and height. Typically 16:9 (1920x1080) for new monitors.

What about my other point, surely if you went from 800dpi -> 940 dpi the after the desktop would be matched but as you'd gone up by a factor of 1.175 in your dpi you'd need to divide your sens in games (first person shooter games) by 1.175?

Edited August 23, 20187 yr by Skidushe

56 minutes ago, Skidushe said:

What about my other point, surely if you went from 800dpi -> 940 dpi the after the desktop would be matched but as you'd gone up by a factor of 1.175 in your dpi you'd need to divide your sens in games (first person shooter games) by 1.175?

nope just leave the sens alone, although leaving it alone is the same as 0% scaling. Alternatively change the fov to achieve a zoom factor of 1.175 instead, then u will have thr same cm/360.

Edited August 23, 20187 yr by Drimzi