Created
January 29, 2021 00:00
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Lua function for geting a surface cframe and size that is aligned to a surface gui
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| local UNIT_X = Vector3.new(1, 0, 0) | |
| local UNIT_Y = Vector3.new(0, 1, 0) | |
| local SPIN_Y = CFrame.fromEulerAnglesXYZ(0, -math.pi/2, 0) | |
| local function getRotationBetween(u, v, axis) | |
| local dot, uxv = u:Dot(v), u:Cross(v) | |
| if dot < -0.99999 then return CFrame.fromAxisAngle(axis, math.pi) end | |
| return CFrame.new(0, 0, 0, uxv.x, uxv.y, uxv.z, 1 + dot) | |
| end | |
| local function getSurfaceCFrame(part, enum) | |
| local pSize = part.Size | |
| local lnormal = Vector3.FromNormalId(enum) | |
| local lrotation = getRotationBetween(UNIT_X, lnormal, UNIT_Y) * SPIN_Y | |
| local components = {lrotation:GetComponents()} | |
| for i = 4, 12 do | |
| components[i] = math.floor(components[i] + 0.5) | |
| end | |
| lrotation = CFrame.new(unpack(components)) | |
| local size = Vector3.new( | |
| math.abs(lrotation.XVector:Dot(pSize)), | |
| math.abs(lrotation.YVector:Dot(pSize)), | |
| math.abs(lrotation.ZVector:Dot(pSize)) | |
| ) | |
| return part.CFrame * CFrame.new(lnormal * pSize/2) * lrotation, size | |
| end |
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