108 lines
2.0 KiB
Lua
108 lines
2.0 KiB
Lua
---@class Vector2
|
|
local Vector2 = {}
|
|
Vector2.__index = Vector2
|
|
|
|
function Vector2.new(x, y)
|
|
return setmetatable({ x = x or 0, y = y or 0 }, Vector2)
|
|
end
|
|
|
|
function Vector2:copy()
|
|
return Vector2.new(self.x, self.y)
|
|
end
|
|
|
|
function Vector2:__tostring()
|
|
return string.format("Vector2(%.3f, %.3f)", self.x, self.y)
|
|
end
|
|
|
|
function Vector2:add(v)
|
|
return Vector2.new(self.x + v.x, self.y + v.y)
|
|
end
|
|
|
|
function Vector2:sub(v)
|
|
return Vector2.new(self.x - v.x, self.y - v.y)
|
|
end
|
|
|
|
function Vector2:mul(scalar)
|
|
return Vector2.new(self.x * scalar, self.y * scalar)
|
|
end
|
|
|
|
function Vector2:div(scalar)
|
|
return Vector2.new(self.x / scalar, self.y / scalar)
|
|
end
|
|
|
|
function Vector2.__add(self, v)
|
|
return Vector2.new(self.x + v.x, self.y + v.y)
|
|
end
|
|
|
|
function Vector2.__sub(self, v)
|
|
return Vector2.new(self.x - v.x, self.y - v.y)
|
|
end
|
|
|
|
function Vector2:length()
|
|
return math.sqrt(self.x^2 + self.y^2)
|
|
end
|
|
|
|
function Vector2:lengthSq()
|
|
return self.x^2 + self.y^2
|
|
end
|
|
|
|
function Vector2:addX(dx)
|
|
self.x = self.x + dx
|
|
return self
|
|
end
|
|
|
|
function Vector2:addY(dy)
|
|
self.y = self.y + dy
|
|
return self
|
|
end
|
|
|
|
function Vector2:normalize()
|
|
local len = self:length()
|
|
if len == 0 then return Vector2.new(0, 0) end
|
|
return Vector2.new(self.x / len, self.y / len)
|
|
end
|
|
|
|
function Vector2:dot(v)
|
|
return self.x * v.x + self.y * v.y
|
|
end
|
|
|
|
function Vector2:distanceTo(v)
|
|
return (self:sub(v)):length()
|
|
end
|
|
|
|
function Vector2:distanceToSq(v)
|
|
return (self:sub(v)):lengthSq()
|
|
end
|
|
|
|
function Vector2:equals(v, epsilon)
|
|
epsilon = epsilon or 1e-5
|
|
return math.abs(self.x - v.x) < epsilon and
|
|
math.abs(self.y - v.y) < epsilon
|
|
end
|
|
|
|
function Vector2:map(func)
|
|
return Vector2.new(func(self.x), func(self.y))
|
|
end
|
|
|
|
function Vector2:toTable()
|
|
return { x = self.x, y = self.y }
|
|
end
|
|
|
|
function Vector2.fromTable(tbl)
|
|
return Vector2.new(tbl.x, tbl.y)
|
|
end
|
|
|
|
function Vector2.fromArray(tbl)
|
|
return Vector2.new(tbl[1], tbl[2])
|
|
end
|
|
|
|
function Vector2:toArray()
|
|
return {self.x, self.y}
|
|
end
|
|
|
|
function Vector2:unpack()
|
|
return self.x, self.y
|
|
end
|
|
|
|
return Vector2
|