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Add experimental vein (fissure) generator.

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This commit is contained in:
Tomáš Brada 2015-05-11 20:27:38 +02:00
parent 1de45a1dd4
commit 668d2f2262
2 changed files with 64 additions and 1 deletions
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4
rocks/init.lua
View File

@ -31,13 +31,15 @@ dofile(modpath.."/skarn.lua")
dofile(modpath.."/pegmatite.lua")
dofile(modpath.."/gensed.lua")
dofile(modpath.."/pipes.lua")
dofile(modpath.."/veins.lua")
minetest.register_on_generated(function(minp,maxp,seed)
local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
local area = VoxelArea:new{MinEdge=emin, MaxEdge=emax}
rocksl.gensed(minp,maxp,seed,vm,area)
--rocksl.genign
rocksl.genpipe(minp,maxp,seed,vm,area)
--rocksl.genpipe(minp,maxp,seed,vm,area)
rocksl.genvein(minp,maxp,seed,vm,area)
vm:write_to_map(data)
end)

61
rocks/veins.lua Normal file
View File

@ -0,0 +1,61 @@
-- experimental fast vein generator
local pr
local function draw_sphere(data,area,pos,radius,with)
local rsq=radius^2
radius=radius+2
for x=-radius, radius do
for y=-radius, radius do
for z=-radius, radius do
if (x^2)+(y^2)+(z^2)<=rsq then
data[area:index(x+pos.x,y+pos.y,z+pos.z)]=with
end
end end end
end
local function line(data,area,A,B,with)
local length=vector.distance(A,B)
local step=1/length
for t=0, 1, step do
local p=vector.add(vector.multiply(A,(1-t)), vector.multiply(B,t) )
p=vector.round(p)
data[area:index(p.x,p.y,p.z)]=with
end
end
rocksl.genvein=function(minp,maxp,seed,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}
pr=pr or PseudoRandom(seed)
local c_sample=minetest.get_content_id("default:mese")
print("pr="..pr:next().." seed="..seed)
print("minp="..minp.x..","..minp.y..","..minp.z)
print("maxp="..maxp.x..","..maxp.y..","..maxp.z)
local pointA=vector.new(pr:next(0,chunksizer)+minp.x,pr:next(0,chunksizer)+minp.y,pr:next(0,chunksizer)+minp.z)
local pointB=vector.new(pr:next(0,chunksizer)+minp.x,pr:next(0,chunksizer)+minp.y,pr:next(0,chunksizer)+minp.z)
local pointC=vector.new(pr:next(0,chunksizer)+minp.x,pr:next(0,chunksizer)+minp.y,pr:next(0,chunksizer)+minp.z)
local pointB2=vector.new(pr:next(0,chunksizer)+minp.x,pr:next(0,chunksizer)+minp.y,pr:next(0,chunksizer)+minp.z)
local step=1.3/(vector.distance(pointA,pointB)+vector.distance(pointB,pointC))
for t=0, 1, step do
local p=vector.multiply(pointA,(1-t)^2)
p=vector.add(p, vector.multiply(pointB,2*t*(1-t)) )
p=vector.add(p, vector.multiply(pointC,t*t) )
local p2=vector.multiply(pointA,(1-t)^2)
p2=vector.add(p2, vector.multiply(pointB2,2*t*(1-t)) )
p2=vector.add(p2, vector.multiply(pointC,t*t) )
p=vector.round(p)
p2=vector.round(p2)
line(data,area,p,p2,c_sample)
end
vm:set_data(data)
minetest.log("action", "rocks/genvein/ "..math.ceil((os.clock() - t1) * 1000).." ms ")
end