diff --git a/line.lua b/line.lua
index a1d6006..9a68263 100644
--- a/line.lua
+++ b/line.lua
@@ -4,9 +4,9 @@
 -- using Bresenham's Algorithm
 -- Converted from the original to Lua
 function edit.calculate_line_points(p1, p2)
-	p1 = vector.copy(p1)
-	p2 = vector.copy(p2)
-	local output = {vector.copy(p1)}
+	p1 = table.copy(p1)
+	p2 = table.copy(p2)
+	local output = {table.copy(p1)}
 	local d = vector.apply(vector.subtract(p1, p2), math.abs)
 	local s = vector.new(
 		p2.x > p1.x and 1 or -1,
@@ -30,7 +30,7 @@ function edit.calculate_line_points(p1, p2)
 			end
 			n1 = n1 + 2 * d.y
 			n2 = n2 + 2 * d.z
-			table.insert(output, vector.copy(p1))
+			table.insert(output, table.copy(p1))
 		end
 
 	-- Driving axis is Y-axis
@@ -49,7 +49,7 @@ function edit.calculate_line_points(p1, p2)
 			end
 			n1 = n1 + 2 * d.x
 			n2 = n2 + 2 * d.z
-			table.insert(output, vector.copy(p1))
+			table.insert(output, table.copy(p1))
 		end
 
 	-- Driving axis is Z-axis
@@ -68,7 +68,7 @@ function edit.calculate_line_points(p1, p2)
 			end
 			n1 = n1 + 2 * d.y
 			n2 = n2 + 2 * d.x
-			table.insert(output, vector.copy(p1))
+			table.insert(output, table.copy(p1))
 		end
 	end
 	return output
diff --git a/polygon.lua b/polygon.lua
index b078d1c..c229783 100644
--- a/polygon.lua
+++ b/polygon.lua
@@ -34,8 +34,8 @@ local function ray_intersects_triangle(ray_origin, ray_vector, vertex_a, vertex_
 end
 
 function edit.calculate_triangle_points(a, b, c)
-	local bounding_box_min = vector.copy(a)
-	local bounding_box_max = vector.copy(a)
+	local bounding_box_min = table.copy(a)
+	local bounding_box_max = table.copy(a)
 	for index, axis in pairs({"x", "y", "z"}) do
 		bounding_box_min[axis] = math.min(a[axis], b[axis], c[axis])
 		bounding_box_max[axis] = math.max(a[axis], b[axis], c[axis])
@@ -63,7 +63,7 @@ function edit.calculate_triangle_points(a, b, c)
 	-- Switch from local to global coordinate system.
 	-- Also works the same to convert local to global coordinate system.
 	local function swap_coord_sys(v)
-		v = vector.copy(v)
+		v = table.copy(v)
 		local old_selected = v[selected_axis]
 		v[selected_axis] = v.y
 		v.y = old_selected
diff --git a/preview.lua b/preview.lua
index c73082f..c9e13bb 100644
--- a/preview.lua
+++ b/preview.lua
@@ -165,8 +165,8 @@ local function update_polygon_preview(player, marker_pos_list, show_polygon_hud)
 	local player_data = edit.player_data[player]
 
 	local show_full_preview = true
-	local bounding_box_min = vector.copy(marker_pos_list[1])
-	local bounding_box_max = vector.copy(marker_pos_list[1])
+	local bounding_box_min = table.copy(marker_pos_list[1])
+	local bounding_box_max = table.copy(marker_pos_list[1])
 	for index, axis in pairs({"x", "y", "z"}) do
 		for i, pos in ipairs(marker_pos_list) do
 			bounding_box_min[axis] = math.min(bounding_box_min[axis], pos[axis])