135 lines
2.6 KiB
Lua
135 lines
2.6 KiB
Lua
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-- Copyright (C) 2017-2020 DBotThePony
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-- Permission is hereby granted, free of charge, to any person obtaining a copy
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-- of this software and associated documentation files (the "Software"), to deal
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-- in the Software without restriction, including without limitation the rights
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-- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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-- of the Software, and to permit persons to whom the Software is furnished to do so,
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-- subject to the following conditions:
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-- The above copyright notice and this permission notice shall be included in all copies
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-- or substantial portions of the Software.
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-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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-- INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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-- PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
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-- FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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-- OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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-- DEALINGS IN THE SOFTWARE.
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local Lerp = Lerp
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local math = math
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local function Lerp(t, a, b)
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return a + (b - a) * t
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end
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--[[
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@doc
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@fname LerpQuintic
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@args T t, T from, T to
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@returns
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T: lerped value
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]]
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function _G.LerpQuintic(t, a, b)
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if t < 0 then return a end
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if t >= 1 then return b end
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local value = t * t * t * (t * (t * 6 - 15) + 10)
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return Lerp(value, a, b)
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end
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--[[
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@doc
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@fname Quintic
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@args T t
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@returns
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T
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]]
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function _G.Quintic(t)
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return t * t * t * (t * (t * 6 - 15) + 10)
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end
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--[[
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@doc
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@fname LerpCosine
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@args T t, T from, T to
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@returns
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T: lerped value
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]]
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function _G.LerpCosine(t, a, b)
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if t < 0 then return a end
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if t >= 1 then return b end
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local value = (1 - math.cos(t * math.pi)) / 2
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return Lerp(value, a, b)
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end
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--[[
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@doc
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@fname Cosine
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@args T t
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@returns
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T
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]]
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function _G.Cosine(t)
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return (1 - math.cos(t * math.pi)) / 2
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end
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--[[
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@doc
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@fname LerpSinusine
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@args T t, T from, T to
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@returns
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T: lerped value
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]]
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function _G.LerpSinusine(t, a, b)
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if t < 0 then return a end
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if t >= 1 then return b end
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local value = (1 - math.sin(t * math.pi)) / 2
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return Lerp(value, a, b)
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end
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--[[
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@doc
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@fname Sinusine
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@args T t
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@returns
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T
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]]
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function _G.Sinusine(t)
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return (1 - math.sin(t * math.pi)) / 2
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end
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--[[
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@doc
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@fname LerpCubic
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@args T t, T from, T to
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@returns
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T: lerped value
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]]
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function _G.LerpCubic(t, a, b)
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if t < 0 then return a end
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if t >= 1 then return b end
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local value = -2 * t * t * t + 3 * t * t
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return Lerp(value, a, b)
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end
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--[[
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@doc
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@fname Cubic
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@args T t
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@returns
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T
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]]
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function _G.Cubic(t)
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return -2 * t * t * t + 3 * t * t
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end
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