BF = BF or {}

BF.Vector3 = function(x, y, z)
    return {x = x, y = y, z = z}
end

BF.Vector4 = function(x, y, z, w)
	return {x = x, y = y, z = z, w = w}
end

BF.Vector2 = function(x, y)
    return {x = x, y = y}
end

BF.Vector2Zero = CS.UnityEngine.Vector2(0, 0)
BF.Vector3Zero = CS.UnityEngine.Vector3(0, 0, 0)
BF.Vector3Right = CS.UnityEngine.Vector3(1, 0, 0)
BF.Vector3Up = CS.UnityEngine.Vector3(0, 1, 0)
BF.Vector3Forward = CS.UnityEngine.Vector3(0, 0, 1)

BF.Color = function(r, g, b, a)
    return {r = r, g = g, b = b, a = a}
end

BF.ColorWhite = CS.UnityEngine.Color(1, 1, 1, 1)
BF.ColorPurple = CS.UnityEngine.Color(1, 0, 1, 1)
BF.ColorWhiteAlpha = CS.UnityEngine.Color(1, 1, 1, 0)
BF.ColorBlack = CS.UnityEngine.Color(0, 0, 0, 1)
BF.ColorBlackAlpha = CS.UnityEngine.Color(0, 0, 0, 0)


BF.Vector2Cross = function (l, r)
	return l.x * r.y - l.y * r.x
end

BF.Vector2Dot = function (l, r)
	return l.x * r.x + l.y * r.y
end

BF.Vector2Magnitude = function(v)
	return math.sqrt(v.x * v.x + v.y * v.y)
end

BF.Vector2Normalize = function (v)
	local normal = BF.Vector2(0, 0)
	local m = BF.Vector2Magnitude(v)
	if m~=0 then
		normal.x = v.x/m
		normal.y = v.y/m
	end
	return normal
end

BF.Vector2Distance = function (v1, v2)
	local deltax = v2.x - v1.x
	local deltay = v2.y - v1.y
	return math.sqrt(deltax*deltax + deltay*deltay)
end

BF.Vector3Magnitude = function(v)
	return math.sqrt(v.x * v.x + v.y * v.y + v.z * v.z)
end