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rocks
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Very old thing that I forgot to commit.

This commit is contained in:
Tomáš Brada 2016-07-17 11:18:36 +02:00
parent 16a9a079d9
commit 2b7e20b4bb
2 changed files with 55 additions and 1 deletions
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a.txt
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Geological layer generator for [Minetest] "rocks"
Geological layer generator for Minetest "rocks" {wip}
=============
Aim of this mod is to replace all generic stone (default:stone) and

54
rocks/veins.lua Normal file
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-- experimental fast vein generator
rocks.veins={}
table.insert(rocks.veins,{
scarcity=80,
})
rocksl.genvein=function(minp,maxp,pr,vm,area)
local t1 = os.clock()
local data = vm:get_data()
local chunksizer = maxp.x - minp.x + 1
local chunksize = chunksizer + 1
local pmapsize = {x = chunksize, y = chunksize, z = chunksize}
local minpxz = {x = minp.x, y = minp.z}
local c_sample=minetest.get_content_id("default:stone")
local c_sample_ore=minetest.get_content_id("default:mese")
local A=vector.new(pr:next(0,chunksizer)+minp.x,pr:next(0,chunksizer)+minp.y,pr:next(0,chunksizer)+minp.z)
local B=vector.new(pr:next(0,chunksizer)+minp.x,pr:next(0,chunksizer)+minp.y,pr:next(0,chunksizer)+minp.z)
local C=vector.new(pr:next(0,chunksizer)+minp.x,pr:next(0,chunksizer)+minp.y,pr:next(0,chunksizer)+minp.z)
local D=vector.new(pr:next(0,chunksizer)+minp.x,pr:next(0,chunksizer)+minp.y,pr:next(0,chunksizer)+minp.z)
local l1=vector.distance(A,C)+vector.distance(C,B)
local l2=vector.distance(A,D)+vector.distance(D,B)
local step=1.4/math.max(l1,l2)
print("step="..step.." l1="..l1.." l2="..l2)
local scarcity=6
local ocn=pr:next(0,scarcity)+(scarcity/2)
for t=0, 1, step do
local P=vector.multiply(A,(1-t)^2)
P=vector.add(P, vector.multiply(B,t*t) )
local Q=vector.add(P, vector.multiply(D,2*t*(1-t)) )
P=vector.add(P, vector.multiply(C,2*t*(1-t)) )
local step2=1/vector.distance(P,Q)
for u=0, 1, step2 do
local R=vector.add(vector.multiply(P,(1-u)), vector.multiply(Q,u) )
local di=area:indexp(vector.round(R))
if ocn<1 then
data[di]=c_sample_ore
ocn=pr:next(0,scarcity)+(scarcity/2)
else
data[di]=c_sample
ocn=ocn-1
end
end
end
vm:set_data(data)
minetest.log("action", "rocks/genvein/ "..math.ceil((os.clock() - t1) * 1000).." ms ")
end