//spline: plot chaikin curve

This commit is contained in:
Starbeamrainbowlabs 2022-09-25 15:30:16 +01:00
parent 9a4b4beb76
commit 2748f4cdfa
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GPG Key ID: 1BE5172E637709C2
5 changed files with 29 additions and 9 deletions

@ -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")

@ -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
---

@ -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

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

@ -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)
local pos_start = result[1]
local pos_end = result[#result]
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 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