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This commit is contained in:
Aaron Smith 2023-09-19 18:36:08 +01:00
parent d8a627c58a
commit 3eb4eb3009
2 changed files with 10 additions and 6 deletions
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5
src/spring.luau
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@ -200,7 +200,7 @@ local function spring<T>(source: () -> T, period: number?, damping_ratio: number
return function() return function()
track(output) track(output)
return output.cache return output.cache
end end, data
end end
local function step_springs(dt: number) local function step_springs(dt: number)
@ -224,6 +224,9 @@ local function step_springs(dt: number)
local ff_123 = u_123*-c local ff_123 = u_123*-c
local ff_456 = u_456*-c local ff_456 = u_456*-c
--assert(math.abs(fs_123.X) >= (math.abs(ff_123.X)), "damping exceeds restoring")
-- calculate acceleration step -- calculate acceleration step
local dv_123 = (fs_123 + ff_123)*dt local dv_123 = (fs_123 + ff_123)*dt
local dv_456 = (fs_456 + ff_456)*dt local dv_456 = (fs_456 + ff_456)*dt

11
test/spring-test.luau
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@ -40,7 +40,7 @@ local function main()
local effect = vide.effect local effect = vide.effect
local value = source(MAX) local value = source(MAX)
local sprung = spring(value, 1, 0.3) local sprung, data = (spring :: any)(value, 1, 19.16)
effect(function() effect(function()
local v = sprung() local v = sprung()
@ -48,14 +48,15 @@ local function main()
local reset = "\27[H\27[2J" -- ANSI clear terminal local reset = "\27[H\27[2J" -- ANSI clear terminal
local offset = string.rep("\n", MAX - fv + OFFSET) local offset = string.rep("\n", MAX - fv + OFFSET)
local bar = testkit.color.gray(remainder_to_block(v - fv) .. "\n" .. string.rep(BLOCK .. "\n", fv)) local bar = testkit.color.gray(remainder_to_block(v - fv) .. "\n" .. string.rep(BLOCK .. "\n", fv))
print(reset .. offset .. bar) local num = "\n" .. v
print(reset .. offset .. bar .. num)
end) end)
local elapsed = 0 local T = 1.5
local elapsed = T/2
repeat local dt = step() repeat local dt = step()
vide.step(dt) vide.step(dt)
local T = 3
elapsed += dt elapsed += dt
while elapsed >= T do while elapsed >= T do
elapsed -= T elapsed -= T