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feat(math): expose interpolate function as math.interp

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Linden
2024-05-08 05:46:57 +10:00
parent 43905bdd62
commit 858a94e7ec
1 changed files with 14 additions and 7 deletions
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21
imports/math/shared.lua
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@@ -129,20 +129,27 @@ end
---@param lower number ---@param lower number
---@param upper number ---@param upper number
---@return number ---@return number
function math.clamp(val, lower, upper) -- credit https://love2d.org/forums/viewtopic.php?t=1856 function math.clamp(val, lower, upper) -- credit https://love2d.org/forums/viewtopic.php?t=1856
if lower > upper then lower, upper = upper, lower end -- swap if boundaries supplied the wrong way if lower > upper then lower, upper = upper, lower end -- swap if boundaries supplied the wrong way
return math.max(lower, math.min(upper, val)) return math.max(lower, math.min(upper, val))
end end
local function interpolate(s, f, t) ---Calculates an intermediate value between `start` and `finish` based on the interpolation `factor`.
return s + (f - s) * t ---@generic T : number | vector2 | vector3 | vector4
---@param start T
---@param finish T
---@param factor integer The interpolation factor between 0 and 1.
---@return unknown
function math.interp(start, finish, factor)
return start + (finish - start) * factor
end end
local function interpolateTable(s, f, t) local function interpolateTable(start, finish, factor)
local interp = math.interp
local result = {} local result = {}
for k, v in pairs(s) do for k, v in pairs(start) do
result[k] = v + (f[k] - v) * t result[k] = interp(v, finish[k], factor)
end end
return result return result
@@ -165,7 +172,7 @@ function math.lerp(start, finish, duration)
assert(typeFinish == typeStart, ("expected argument 2 to have type '%s' (received %s)"):format(typeStart, typeFinish)) assert(typeFinish == typeStart, ("expected argument 2 to have type '%s' (received %s)"):format(typeStart, typeFinish))
local interpFn = typeStart == 'table' and interpolateTable or interpolate local interpFn = typeStart == 'table' and interpolateTable or math.interp
local step local step
return function() return function()