Reference | DELTA

DELTA

Return the ratio between the last UPDATE duration and a 60 FPS reference frame time.

This value keeps movements and animations running at a consistent speed, no matter the frame rate.

The delta is 1.0 at 60 FPS and 2.0 at 30 FPS. Multiplying a value by this delta keeps its per‑second progression stable over time.

ExampleSource

create sprite 8 as "benchmark"
add "benchmark" frame

do
_{' simulated lag}
	?angle + 1
	?lag = 0.1 * (sin ?angle)
	?lag = (abs ?lag)
	wait ?lag

	turn "benchmark" by 3 * (delta)
	clear screen
	trace text "lag= ?lag" center 0, 90
	trace text "delta= " + (delta) center 0, 80
	trace text "fps= " + (fps) center 0, 70

	update
loop

memo