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Fix spring not recognising roblox types

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This commit is contained in:
aaron 2023-08-25 11:18:13 +01:00
parent 64d2a1f55c
commit be59b24851
1 changed files with 23 additions and 15 deletions
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38
src/spring.luau
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@ -21,6 +21,7 @@ Unsupported datatypes:
]]
local throw = require(script.Parent.throw)
local graph = require(script.Parent.graph)
type Node<T> = graph.Node<T>
local create = graph.create
@ -29,7 +30,7 @@ local set_effect = graph.set_effect
local capture = graph.capture
local UPDATE_RATE = 120
local TOLERANCE = 0.00001
local TOLERANCE = 0.0001
type Vec3 = Vector3
@ -129,19 +130,27 @@ local vec6_to_type = {
end :: Vec6ToType<Rect>
}
local invalid_type = {
__index = function(_, t: string)
throw(`cannot spring type {t}`)
end
}
setmetatable(type_to_vec6, invalid_type)
setmetatable(vec6_to_type, invalid_type)
-- maps spring data to its corresponding output node
-- lifetime of spring data is tied to output node's
local springs: { [SpringData<any>]: Node<any> } = {}
setmetatable(springs, { __mode = "vs" })
setmetatable(springs, { __mode = "v" })
local function spring<T>(source: () -> T, period: number?, damping_ratio: number?): () -> T
local inputs, initial_position = capture(source)
local output, output_get = create(initial_position)
local inputs, initial_value = capture(source)
local output, output_get = create(initial_value)
local source_value = source()
local vtype = typeof(source_value)
local vtype = typeof(initial_value)
local x1_123, x1_456 = type_to_vec6[vtype](source_value)
local x1_123, x1_456 = type_to_vec6[vtype](initial_value)
-- https://en.wikipedia.org/wiki/Damping
-- todo: calculate damped freq at 10tau instead of natural freq
@ -153,7 +162,7 @@ local function spring<T>(source: () -> T, period: number?, damping_ratio: number
local c_c = 2*w_n
local c = z * c_c
local data: SpringData<T> = {
local data: SpringData<T> = { -- todo: confirm gc of data
k = k,
c = c,
@ -165,25 +174,24 @@ local function spring<T>(source: () -> T, period: number?, damping_ratio: number
x1_456 = x1_456,
v_456 = Vec3(),
source_value = source_value,
_ = source -- prevent gc of source while data exists
source_value = initial_value,
}
-- reschedule spring for simulation on input update
local function input_updated(node)
local function input_updated()
local v = source()
data.x1_123, data.x1_456 = type_to_vec6[type(v)](v)
data.x1_123, data.x1_456 = type_to_vec6[typeof(v)](v)
data.source_value = v
springs[data] = node
springs[data] = output -- todo: investigate why insertion is not O(1) at ~20k springs
end
output.derive = input_updated :: any -- have output reference inputs
-- register above function as side-effect for all inputs
for _, input in next, inputs do
set_effect(input, input_updated, output)
end
springs[data] = output
return output_get
end