About variable dt?

Questions
1

From doc

Variable Dt (deprecated)
Deprecated. If checked, will check `Vsync` and set `Frame Cap` to 0 at build-time for equivalent behavior.

But with check Vsync and frame cap:0 i always get 16.6 ms per frame. If have 30ms game run x0.5 speed. And i get 16ms in update.So it is not variable dt

So need unckeck Vsync to get variable dt.

Is it worked as expected? It bug or documentation wrong?

2

With display.vsync = 1 and display.update_frequency = 0, you’ll get the framerate of your monitor (if it reports vsync correctly). If your frame is 60Hz, you’ll get 1s/60 =16.67ms each frame.

More on these settings in the manual:

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3

So it bug in doc.
Variable dt, is unckeched vsync?

4

I would say so, yes.

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5

IN the editor, the documentation for the variables are:

display.frame_cap
“if Vsync checked, snaps to the closest matching swap interval for the set frame cap. Otherwise uses timers to respect the set value, 0 means no cap. For deprecated ‘variable_dt’ behavior, set to 0 and uncheck ‘Vsync’”

display.update_frequency
“Vertical sync, rely on hardware vsync for frame timing. Can be overridden depending on graphics driver and platform specifics. For deprecated ‘variable_dt’ behavior, uncheck this setting and set frame cap 0”

(shown when you hover on the settings in the editor)

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