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153 lines
2.7 KiB
153 lines
2.7 KiB
local acos = math.acos
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local clamp = Mathf.Clamp
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local sqrt = Mathf.Sqrt
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local setmetatable = setmetatable
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local rawset = rawset
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local rawget = rawget
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local Vector2 = {}
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local get = tolua.initget(Vector2)
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Vector2.__index = function(t,k)
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local var = rawget(Vector2, k)
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if var == nil then
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var = rawget(get, k)
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if var ~= nil then
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return var(t)
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end
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end
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return var
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end
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Vector2.__call = function(t, x, y)
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return Vector2.New(x, y)
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end
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function Vector2.New(x, y)
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-- print(debug.traceback(""))
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-- print("2222222222222222222222222 Vector2.New")
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local v = {x = x or 0, y = y or 0}
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setmetatable(v, Vector2)
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return v
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end
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function Vector2:Set(x,y)
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self.x = x or 0
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self.y = y or 0
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end
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function Vector2:Get()
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return self.x, self.y
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end
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function Vector2:SqrMagnitude()
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return self.x * self.x + self.y * self.y
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end
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function Vector2:Clone()
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return Vector2.New(self.x, self.y)
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end
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function Vector2:Normalize()
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local v = self:Clone()
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return v:SetNormalize()
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end
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function Vector2:SetNormalize()
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local num = self:Magnitude()
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if num == 1 then
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return self
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elseif num > 1e-05 then
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self:Div(num)
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else
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self:Set(0,0)
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end
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return self
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end
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function Vector2.Dot(lhs, rhs)
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return lhs.x * rhs.x + lhs.y * rhs.y
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end
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function Vector2.Angle(from, to)
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return acos(clamp(Vector2.Dot(from:Normalize(), to:Normalize()), -1, 1)) * 57.29578
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end
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function Vector2.Magnitude(v2)
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return sqrt(v2.x * v2.x + v2.y * v2.y)
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end
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function Vector2:Div(d)
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self.x = self.x / d
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self.y = self.y / d
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return self
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end
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function Vector2:Mul(d)
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self.x = self.x * d
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self.y = self.y * d
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return self
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end
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function Vector2:Add(b)
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self.x = self.x + b.x
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self.y = self.y + b.y
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return self
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end
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function Vector2:Sub(b)
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self.x = self.x - b.x
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self.y = self.y - b.y
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return
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end
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Vector2.__tostring = function(self)
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return string.format("[%f,%f]", self.x, self.y)
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end
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Vector2.__div = function(va, d)
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return Vector2.New(va.x / d, va.y / d)
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end
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Vector2.__mul = function(va, d)
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return Vector2.New(va.x * d, va.y * d)
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end
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Vector2.__add = function(va, vb)
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return Vector2.New(va.x + vb.x, va.y + vb.y)
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end
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Vector2.__sub = function(va, vb)
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return Vector2.New(va.x - vb.x, va.y - vb.y)
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end
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Vector2.__unm = function(va)
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return Vector2.New(-va.x, -va.y)
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end
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Vector2.__eq = function(va,vb)
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return va.x == vb.x and va.y == vb.y
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end
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get.up = function() return Vector2.New(0,1) end
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get.right = function() return Vector2.New(1,0) end
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get.zero = function() return Vector2.New(0,0) end
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get.one = function() return Vector2.New(1,1) end
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get.magnitude = Vector2.Magnitude
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get.normalized = Vector2.Normalize
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get.sqrMagnitude = Vector2.SqrMagnitude
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UnityEngine.Vector2 = Vector2
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setmetatable(Vector2, Vector2)
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return Vector2
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