//spline: plot chaikin curve

worldeditadditions/init.lua

@@ -30,6 +30,7 @@ dofile(wea.modpath.."/lib/scale.lua")
 dofile(wea.modpath.."/lib/spiral_square.lua")
 dofile(wea.modpath.."/lib/spiral_circle.lua")
 dofile(wea.modpath.."/lib/dome.lua")
+dofile(wea.modpath.."/lib/spline.lua")
 dofile(wea.modpath.."/lib/conv/conv.lua")
 dofile(wea.modpath.."/lib/erode/erode.lua")
 dofile(wea.modpath.."/lib/noise/init.lua")

worldeditadditions/lib/spline.lua

@@ -58,15 +58,18 @@ function worldeditadditions.spline(pos_list, width_start, width_end, steps, targ
 	-- 3: Replace nodes
 	---
 	
+	local pos_prev = pos_list_chaikin[1]:floor()
 	for i = 1, #pos_list_chaikin do
-		local pos_next = pos_list_chaikin[i]
+		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
 		
 		count = count + 1
+		pos_prev = pos_next:clone()
 	end
 	
 	---

worldeditadditions_commands/commands/spline.lua

@@ -19,7 +19,7 @@ worldeditadditions_core.register_command("spline", {
 		local replace_node
 		local width_start
 		local width_end
-		local steps = 6
+		local steps = 3
 		
 		if #parts < 1 then
 			return false, "Error: The replace_node (e.g. dirt) was not specified."
@@ -79,6 +79,7 @@ worldeditadditions_core.register_command("spline", {
 			pos_list,
 			width_start,
 			width_end,
+			steps,
 			replace_node
 		)
 		if not success then return success, nodes_replaced end

worldeditadditions_core/core/pos.lua

@@ -245,5 +245,6 @@ anchor = wea_c.EventEmitter.new({
 	set_all = set_all,
 	compat_worldedit_get = compat_worldedit_get
 })
+anchor.debug = true
 
 return anchor

worldeditadditions_core/utils/chaikin.lua

@@ -17,21 +17,35 @@ 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))
 	local result = wea_c.table.shallowcopy(arr_pos)
-	for pass = 1, steps do
-		local pos_start = result[1]
-		local pos_end = result[#result]
 	
-		for i = 1,#result-1,2 do
-			result[i] = linear_interpolate(result[i], result[i+1], 0.25)
-			table.insert(result, i+1, linear_interpolate(result[i], result[i+2]))
+	local pos_start = result[1]
+	local pos_end = result[#result]
+	
+	for pass = 1, steps do
+		local result_nextpass = {}
+		-- local offset = 0
+		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)
+			
+			table.insert(result_nextpass, linear_interpolate(pos_cur, pos_next, 0.25))
+			table.insert(result_nextpass, linear_interpolate(pos_cur, pos_next, 0.75))
+			-- result[i+offset] = linear_interpolate(pos_cur, pos_next, 0.25)
+			-- table.insert(result, i+1+offset, linear_interpolate(pos_cur, pos_next, 0.75))
+			-- offset = offset + 1
 		end
+		
 		-- table.remove(result, #result-1) -- In the original, but I don't know why
 		
+		result = result_nextpass
 		-- Keep the starting & ending positions the same
 		result[1] = pos_start
 		result[#result] = pos_end
+		
+		print("DEBUG:chakin STEP", wea_c.inspect(result))
 	end
 	
 	return result