fix //spline :D

worldeditadditions/lib/spline.lua

@@ -59,17 +59,52 @@ function worldeditadditions.spline(pos_list, width_start, width_end, steps, targ
 	---
 	
 	local pos_prev = pos_list_chaikin[1]:floor()
-	for i = 1, #pos_list_chaikin do
+	local width_prev = widths_lerped[1]
+	for i = 2, #pos_list_chaikin do
 		local pos_next = pos_list_chaikin[i]:floor()
 		local width_next = widths_lerped[i]
 		
-		print("DEBUG:spline DRAW pos", pos_next, "width", width_next, "length", (pos_next - pos_prev):length())
 		-- For now, just plot a point at each node
-		local index_node = area:index(pos_next.x, pos_next.y, pos_next.z)
-		data[index_node] = node_id
+		data[area:indexp(pos_next)] = node_id
+		data[area:indexp(pos_prev)] = node_id
 		
+		local subline_length = (pos_next - pos_prev):length()
+		print("DEBUG:spline DRAW pos", pos_next, "width", width_next, "length", subline_length)
+		if subline_length > 0 then
+			
+			-- Iterate a box around the subline and draw it
+			local width_max = math.ceil(math.max(width_prev, width_next))
+			local subpos1, subpos2 = Vector3.sort(pos_next, pos_prev)
+			subpos1 = subpos1 - width_max
+			subpos2 = subpos2 + width_max
+			
+			print("subpos1", subpos1, "subpos2", subpos2, "width_prev", width_prev, "width_next", width_next)
+			
+			for z = subpos2.z, subpos1.z, -1 do
+				for y = subpos2.y, subpos1.y, -1 do
+					for x = subpos2.x, subpos1.x, -1 do
+						local here = Vector3.new(x, y, z)
+						local D = (pos_next - pos_prev):normalise()
+						local d = Vector3.dot(here - pos_prev, D)
+						local closest_on_line = pos_prev + (D * d)
+						local distance = (here - closest_on_line):length()
+						
+						local distance_to_prev = (closest_on_line - pos_prev):length()
+						
+						local percentage_along_line = distance_to_prev / subline_length
+						local width_here = wea_c.lerp(width_prev, width_next, percentage_along_line)
+						if distance < width_here then
+							-- print("POINT ", here, "width_here", width_here, "distance from line", distance)
+							data[area:indexp(here)] = node_id
+							-- May hit some nodes multiplle times, but there's nothing doing about that without a big performance (and/or memory) hit
 							count = count + 1
+						end
+					end
+				end
+			end
 			pos_prev = pos_next:clone()
+			width_prev = width_next
+		end
 	end
 	
 	---

worldeditadditions_commands/commands/spline.lua

@@ -35,18 +35,18 @@ worldeditadditions_core.register_command("spline", {
 		
 		width_start = tonumber(parts[2])
 		if not width_start then
-			return false, "Error: width_start must be an integer greater than or  equal to 1."
+			return false, "Error: width_start must be an integer greater than or  equal to 0."
 		end
-		if width_start < 1 then
+		if width_start < 0 then
 			return false, "Error: width_start must be an integer greater than 0, but you passed '"..parts[2].."'."
 		end
 		
 		if #parts >= 3 then
 			width_end = tonumber(parts[3])
 			if not width_end then
-				return false, "Error: width_end must be an integer greater than or  equal to 1."
+				return false, "Error: width_end must be an integer greater than or  equal to 0."
 			end
-			if width_end < 1 then
+			if width_end < 0 then
 				return false, "Error: width_end must be an integer greater than 0, but you passed '"..parts[3].."'."
 			end
 		else

worldeditadditions_core/utils/chaikin.lua

@@ -17,7 +17,7 @@ end
 -- @param	steps		number		The number of interpolatioon passes to do.
 -- @returns	Vector3[]	A (longer) list of interpolated points.
 local function chaikin(arr_pos, steps)
-	print("DEBUG:chaikin START", wea_c.inspect(arr_pos))
+	-- print("DEBUG:chaikin START", wea_c.inspect(arr_pos))
 	local result = wea_c.table.shallowcopy(arr_pos)
 	
 	local pos_start = result[1]
@@ -29,7 +29,7 @@ local function chaikin(arr_pos, steps)
 		for i = 1,#result-1,1 do
 			local pos_cur = result[i]
 			local pos_next = result[i+1]
-			print("DEBUG:chaikin SUBSTEP i", i, "pos_cur", pos_cur, "pos_next", pos_next)
+			-- print("DEBUG:chaikin SUBSTEP i", i, "pos_cur", pos_cur, "pos_next", pos_next)
 			
 			table.insert(result_nextpass, linear_interpolate(pos_cur, pos_next, 0.25))
 			table.insert(result_nextpass, linear_interpolate(pos_cur, pos_next, 0.75))
@@ -45,7 +45,7 @@ local function chaikin(arr_pos, steps)
 		result[1] = pos_start
 		result[#result] = pos_end
 		
-		print("DEBUG:chakin STEP", wea_c.inspect(result))
+		-- print("DEBUG:chakin STEP", wea_c.inspect(result))
 	end
 	
 	return result