47 lines
1.1 KiB
Lua
47 lines
1.1 KiB
Lua
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--作者： xihan
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--日期： 2019-05-15
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--文件： Ray.lua
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--模块： Ray
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--描述： Ray的运算
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------------------------------------------------
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local L_Rawget = rawget
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local L_Setmetatable = setmetatable
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local Ray = {}
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local function New(direction, origin)
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return L_Setmetatable({direction = direction:Normalize(), origin = origin}, Ray)
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end
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function Vector4:Get()
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return self.origin, self.direction
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end
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function Ray:GetPoint(distance)
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local _dir = self.direction * distance
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_dir:Add(self.origin)
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return _dir
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end
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Ray.__tostring = function(self)
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return string.format("Origin:(%f,%f,%f),Dir:(%f,%f, %f)", self.origin.x, self.origin.y, self.origin.z, self.direction.x, self.direction.y, self.direction.z)
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end
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Ray.__index = function(t, k)
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return L_Rawget(Ray, k)
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end
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local L_Metatable = {}
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L_Metatable.__call = function(t, direction, origin)
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if direction.direction then
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return New(direction.direction, direction.origin)
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else
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return New(direction, origin)
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end
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end
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L_Setmetatable(Ray, L_Metatable)
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return Ray
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