50 lines
1014 B
Lua
50 lines
1014 B
Lua
|
local Vector2D = {}
|
||
|
|
function Vector2D.New(x, y)
|
||
|
|
return {X = x or 0, Y = y or 0}
|
||
|
|
end
|
||
|
|
|
||
|
|
function Vector2D.Add(a, b)
|
||
|
|
return Vector2D.New(a.X + b.X, a.Y + b.Y)
|
||
|
|
end
|
||
|
|
|
||
|
|
function Vector2D.Sub(a, b)
|
||
|
|
return Vector2D.New(a.X - b.X, a.Y - b.Y)
|
||
|
|
end
|
||
|
|
|
||
|
|
function Vector2D.Mul(v, s)
|
||
|
|
return Vector2D.New(v.X * s, v.Y * s)
|
||
|
|
end
|
||
|
|
|
||
|
|
function Vector2D.Div(v, s)
|
||
|
|
return Vector2D.New(v.X / s, v.Y / s)
|
||
|
|
end
|
||
|
|
|
||
|
|
function Vector2D.Magnitude(v)
|
||
|
|
return math.sqrt(v.X * v.X + v.Y * v.Y)
|
||
|
|
end
|
||
|
|
|
||
|
|
function Vector2D.Normalize(v)
|
||
|
|
local mag = Vector2D.Magnitude(v)
|
||
|
|
return mag > 0 and Vector2D.Div(v, mag) or Vector2D.New()
|
||
|
|
end
|
||
|
|
|
||
|
|
function Vector2D.Dot(a, b)
|
||
|
|
return a.X * b.X + a.Y * b.Y
|
||
|
|
end
|
||
|
|
|
||
|
|
-- 2D 叉积（返回标量）
|
||
|
|
function Vector2D.Cross(a, b)
|
||
|
|
return a.X * b.Y - a.Y * b.X
|
||
|
|
end
|
||
|
|
|
||
|
|
function Vector2D.ToUnrealEngine3D(vector, z)
|
||
|
|
local FVector = import("Vector")
|
||
|
|
local new_vector = FVector()
|
||
|
|
new_vector.Z = z
|
||
|
|
new_vector.X = vector.X
|
||
|
|
new_vector.Y = vector.Y
|
||
|
|
return new_vector
|
||
|
|
end
|
||
|
|
|
||
|
|
|
||
|
|
return Vector2D
|