Put a note next to delta

[Tolyzor]

A note needs to be added to the delta chip because as it stands, people think it is something it's not;

Delta does NOT measure change/s

Delta measures change/45ms, meaning that if you want to find the acceleration of your contraption in M/s^2 the correct equation is Acceleration = ($Speed) * 22.222...

An easy way to prove what i am saying is to put a speedo and a gps on a plate, when the plate is moving up or down the delta of the gps' Z output is 22.222... times less than the Z velocity given by the speedo.

[Syranide]

To be more correct, delta measures change/frame, it only measures the difference between the current and previous value of the variable. Meaning, it is dependent on what framerate you have.

We had experimental implementations of delta/second, but we discarded them because Lua is dependent on the framerate of garrysmod, which is dependent on lots of things. Meaning that a slightly varying framerate causes different lengths for each frame, not a problem in itself, but the physics is probably not exactly dependent on frametime. Additionally, it needs to have an exact interval which then of course cannot be guaranteed, especially since static values does not cause additional updates.

To sum it up, delta/second is possible, but it becomes (quite alot) less precise. Which we can live with, but seeing that the current delta provides virtually the exact same thing, but with better precision. The only difference is that whatever factor you have, also needs to compensate for the update interval.

So the decision was made not to make it available, because most of the people would probably always use that instead without knowing the consequenses. You can implement it yourself as an expression if you really want.

[Fizyk]

There is a delta/second gate and it's called derivative (actually derivative is change in the value divided by time that has passed, but when you divide by time in seconds, what you get is exactly change per second).

[Black Phoenix]

Also there's multiply gate :cyborgmatt:

[chinoto]

I tried using derivative to get the output of Life Support entities.
Edit: Forgot to say it didn't work.

[Jat Goodwin]

So the delta per frame... if my server is running at 500 fps, will that mean it updates every 500fps?
or does it update on the client's fps.

[Azrael]

The delta chip updates every time the value changes, Hence, the delta chip is not d/dt as you so wrongly presumed, but simply the the current value minus the previous value. The derivative gate is what you're looking for.

I wrote an epic post explaining this but it seemed it didn't post here so you can have this one instead.

[Syranide]

So the delta per frame... if my server is running at 500 fps, will that mean it updates every 500fps?
or does it update on the client's fps.

Wire is still limited to 55 FPS or something, I don't remember exactly.