util.easing.linear
Shared
Returns the progress value unchanged — a straight-line curve from 0 to 1
Syntax
local result = util.easing.linear(
progress
)util.easing.linear applies no easing — the output equals the input.
- Constant speed — motion starts and ends at the same speed with no acceleration or deceleration.
- Best for — mechanical or technical motion where a consistent rate of change is required.
Parameters
| Type | Name | Description |
|---|---|---|
float | progress | Interpolation factor, typically in the range [0, 1] |
Returns
| Type | Name | Description |
|---|---|---|
float | result | The same value as progress |
Examples
core.engine.print("info", util.easing.linear(0.0)) -- 0.0
core.engine.print("info", util.easing.linear(0.25)) -- 0.25
core.engine.print("info", util.easing.linear(0.5)) -- 0.5
core.engine.print("info", util.easing.linear(0.75)) -- 0.75
core.engine.print("info", util.easing.linear(1.0)) -- 1.0local resolution = core.engine.get_resolution()
local duration = 2.0
local start_tick = core.engine.get_tick()
util.event.on("sandbox:draw", function()
local elapsed = (core.engine.get_tick() - start_tick) / 1000.0
local t = math.min(elapsed / duration, 1.0)
local x = util.easing.lerp(0, resolution[1], util.easing.linear(t))
core.engine.draw_circle({x, resolution[2]*0.5}, 16, {1, 1, 1, 1})
end)