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-- This file is part of SA MoonLoader package.
-- Licensed under the MIT License.
-- Copyright (c) 2016, BlastHack Team <blast.hk>
-- Vector3D class
-- authors: MTA Team (original MTA's CVector), FYP (lua implementation)
local EPSILON = 0.0001
local function isNearZero(f)
return math.abs(f) < EPSILON
end
Vector3D = function(x, y, z)
local mt = {}
local obj = {
x = x,
y = y,
z = z
}
function obj:get()
return self.x, self.y, self.z
end
function obj:length()
return math.sqrt(self.x * self.x + self.y * self.y + self.z * self.z)
end
function obj:normalize()
local len = self:length()
if len < EPSILON then return 0 end
self.x = self.x / len
self.y = self.y / len
self.z = self.z / len
return len
end
function obj:zeroNearZero()
if isNearZero(self.x) then self.x = 0 end
if isNearZero(self.y) then self.y = 0 end
if isNearZero(self.z) then self.z = 0 end
end
function obj:dotProduct(v)
return self.x * v.x + self.y * v.y + self.z * v.z
end
function obj:crossProduct(v)
local x, y, z = self.x, self.y, self.z
self.x = y * v.z - v.y * z
self.y = z * v.x - v.z * x
self.z = x * v.y - v.x * y
end
obj.zero_near_zero = obj.zeroNearZero
obj.dot_product = obj.dotProduct
obj.cross_product = obj.crossProduct
-- meta
function mt:__add(v)
return Vector3D(self.x + v.x, self.y + v.y, self.z + v.z)
end
function mt:__mul(v)
if type(v) == "number" then
return Vector3D(self.x * v, self.y * v, self.z * v)
end
return Vector3D(self.x * v.x, self.y * v.y, self.z * v.z)
end
function mt:__sub(v)
return Vector3D(self.x - v.x, self.y - v.y, self.z - v.z)
end
setmetatable(obj, mt)
return obj
end
return Vector3D
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