mirror of
https://github.com/sbrl/Minetest-WorldEditAdditions.git
synced 2024-06-25 22:44:57 +00:00
Starbeamrainbowlabs
fd5804dd9c
Specifically, I'm unsure about whether I'm happy with the effects of the algorithm. Also, we convolve with a 3x3 gaussian kernel after erosion is complete - and we have verified that the erosion is having an positive effect at "roughening up" a terrain surface. It seems like the initial blog post was correct: the algorithm does tend to make steep surfaces steeper. It also appears that it's more effective on larger areas, and 'gentler' curves. THis might be because the surface normals are more conducive to making the snowballs roll. Finally, we need to decide whether we want to keep the precomputed normals as we have now, or whether we want to dynamically compute them at the some of request.
45 lines
2.3 KiB
Lua
45 lines
2.3 KiB
Lua
-- ███████ ██████ ██████ ██████ ███████
|
|
-- ██ ██ ██ ██ ██ ██ ██ ██
|
|
-- █████ ██████ ██ ██ ██ ██ █████
|
|
-- ██ ██ ██ ██ ██ ██ ██ ██
|
|
-- ███████ ██ ██ ██████ ██████ ███████
|
|
worldedit.register_command("erode", {
|
|
params = "[<snowballs|...> [<key_1> [<vaue_1>]] [<key_2> [<value_2>]] ...]",
|
|
description = "Runs the specified erosion algorithm over the given defined region. This may occur in 2d or 3d. Currently implemented algorithms: snowballs (default;2d hydraulic-like). Also optionally takes an arbitrary set of key - value pairs representing parameters to pass to the algorithm. See the full documentation for details.",
|
|
privs = { worldedit = true },
|
|
require_pos = 2,
|
|
parse = function(params_text)
|
|
if not params_text or params_text == "" then
|
|
return true, "snowballs", {}
|
|
end
|
|
|
|
if params_text:find("%s") == nil then
|
|
return true, params_text, {}
|
|
end
|
|
|
|
local algorithm, params = params_text:match("([^%s]+)%s(.+)")
|
|
if algorithm == nil then
|
|
return false, "Failed to split params_text into 2 parts (this is probably a bug)"
|
|
end
|
|
|
|
local success, map = worldeditadditions.parse_map(params)
|
|
if not success then return success, map end
|
|
return true, algorithm, map
|
|
end,
|
|
nodes_needed = function(name)
|
|
return worldedit.volume(worldedit.pos1[name], worldedit.pos2[name])
|
|
end,
|
|
func = function(name, algorithm, params)
|
|
local start_time = worldeditadditions.get_ms_time()
|
|
local success, stats = worldeditadditions.erode.run(
|
|
worldedit.pos1[name], worldedit.pos2[name],
|
|
algorithm, params
|
|
)
|
|
if not success then return success, stats end
|
|
local time_taken = worldeditadditions.get_ms_time() - start_time
|
|
|
|
minetest.log("action", name .. " used //erode "..algorithm.." at " .. worldeditadditions.vector.tostring(worldedit.pos1[name]) .. ", adding " .. stats.added .. " nodes and removing " .. stats.removed .. " nodes in " .. time_taken .. "s")
|
|
return true, stats.added .. " nodes added and " .. stats.removed .. " nodes removed in " .. worldeditadditions.human_time(time_taken)
|
|
end
|
|
})
|