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Optimizarion.

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This commit is contained in:
Tomáš Brada 2015-05-11 20:58:54 +02:00
parent f82fd46656
commit 08636f4b22
1 changed files with 8 additions and 11 deletions
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19
rocks/veins.lua
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@ -1,7 +1,5 @@
-- experimental fast vein generator
local pr
local function draw_sphere(data,area,pos,radius,with)
local rsq=radius^2
radius=radius+2
@ -32,7 +30,7 @@ rocksl.genvein=function(minp,maxp,seed,vm,area)
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 pr=PseudoRandom(seed)
local c_sample=minetest.get_content_id("default:mese")
print("pr="..pr:next().." seed="..seed)
@ -43,16 +41,15 @@ rocksl.genvein=function(minp,maxp,seed,vm,area)
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))
local l1=vector.distance(pointA,pointB)+vector.distance(pointB,pointC)
local l2=1/(vector.distance(pointA,pointB2)+vector.distance(pointB2,pointC))
local step=1.3/math.max(l1,l2)
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)) )
local p
p=vector.multiply(pointA,(1-t)^2)
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)
p=vector.add(p, vector.multiply(pointB,2*t*(1-t)) )
local p2=vector.add(p, vector.multiply(pointB2,2*t*(1-t)) )
line(data,area,p,p2,c_sample)
end