Mirrorlandia_minetest/Minetest-WorldEditAdditions
1
0
Fork 0
mirror of https://github.com/sbrl/Minetest-WorldEditAdditions.git synced 2024-11-27 09:33:52 +01:00
Code Issues Projects Releases Wiki Activity

Add backend functionality for metaballs

Browse Source 
Implementing a frontend command sounds like a headache to me
This commit is contained in:
Starbeamrainbowlabs 2022-05-15 17:42:19 +01:00
parent 03fb033b70
commit f34617a3d3
No known key found for this signature in database
GPG Key ID: 1BE5172E637709C2
2 changed files with 64 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
worldeditadditions/init.lua
View File

@ -59,6 +59,7 @@ 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/metaballs.lua")
dofile(wea.modpath.."/lib/conv/conv.lua")
dofile(wea.modpath.."/lib/erode/erode.lua")
dofile(wea.modpath.."/lib/noise/init.lua")

63
worldeditadditions/lib/metaballs.lua Normal file
View File

@ -0,0 +1,63 @@
local wea = worldeditadditions
local Vector3 = wea.Vector3
-- ███ ███ ███████ ████████ █████ ██████ █████ ██ ██ ███████
-- ████ ████ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
-- ██ ████ ██ █████ ██ ███████ ██████ ███████ ██ ██ ███████
-- ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
-- ██ ██ ███████ ██ ██ ██ ██████ ██ ██ ███████ ███████ ███████
--- Renders 2 or more metaballs with the given node and threshold value.
-- direction the point should point.
-- @param metaballs [{pos: Vector3, radius: number}] Aa list of metaballs to render. Each metaball should be a table with 2 properties: pos - the position of the centre of the metaball as a Vector3, and radius - the radius of the metaball.
-- @param replace_node string The fully qualified name of the node to use to make the dome with.
function worldeditadditions.metaballs(metaballs, replace_node, threshold)
local pos1, pos2
if not threshold then threshold = 1 end
for i,metaball in ipairs(metaballs) do
local pos1_c = metaball.pos - metaball.radius
local pos2_c = metaball.pos + metaball.radius
if i == 1 then
pos1 = pos1_c
pos2 = pos2_c
end
pos1 = Vector3.min(pos1, pos1_c)
pos2 = Vector3.max(pos2, pos2_c)
end
-- pos2 will always have the highest co-ordinates now
-- Fetch the nodes in the specified area
local manip, area = worldedit.manip_helpers.init(pos1, pos2)
local data = manip:get_data()
local node_id_replace = minetest.get_content_id(replace_node)
local replaced = 0
for z = pos2.z, pos1.z, -1 do
for y = pos2.y, pos1.y, -1 do
for x = pos2.x, pos1.x, -1 do
local pos_here = Vector3.new(x, y, z)
local metaball_sum = 0
for i,metaball in ipairs(metaballs) do
local distance_sq = (metaball.pos - pos_here):length_squared()
local radius_sq = metaball.radius * metaball.radius
local falloff = (1 / (distance_sq/radius_sq)) ^ 2
metaball_sum = metaball_sum + falloff
end
if metaball_sum <= threshold then
data[area:index(x, y, z)] = node_id_replace
replaced = replaced + 1
end
end
end
end
-- Save the modified nodes back to disk & return
worldedit.manip_helpers.finish(manip, data)
return true, replaced
end