mtcontrib/mapgen_rivers
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Add directly a reference to the polygon table in the polygon list, instead of adding an index

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Gael-de-Sailly 2020-04-13 09:54:04 +02:00
parent 4e8288afbe
commit 34de4269ee
1 changed files with 5 additions and 11 deletions
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16
init.lua
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@ -98,12 +98,10 @@ local function generate(minp, maxp, seed)
local ystride = a.ystride -- Tip : the ystride of a VoxelArea is the number to add to the array index to get the index of the position above. It's faster because it avoids to completely recalculate the index.
local chulens = maxp.z - minp.z + 1
local polygon_number = {}
local polygons = {}
local xpmin, xpmax = math.max(math.floor(minp.x/blocksize - 0.5), 0), math.min(math.ceil(maxp.x/blocksize), X-2)
local zpmin, zpmax = math.max(math.floor(minp.z/blocksize - 0.5), 0), math.min(math.ceil(maxp.z/blocksize), Z-2)
local n = 1
local n_filled = 0
for xp = xpmin, xpmax do
for zp=zpmin, zpmax do
local iA = index(xp, zp)
@ -112,6 +110,7 @@ local function generate(minp, maxp, seed)
local iD = index(xp, zp+1)
local poly_x = {offset_x[iA]+xp, offset_x[iB]+xp+1, offset_x[iC]+xp+1, offset_x[iD]+xp}
local poly_z = {offset_z[iA]+zp, offset_z[iB]+zp, offset_z[iC]+zp+1, offset_z[iD]+zp+1}
local polygon = {x=poly_x, z=poly_z, i={iA, iB, iC, iD}}
local bounds = {}
local xmin = math.max(math.floor(blocksize*math.min(unpack(poly_x)))+1, minp.x)
@ -144,24 +143,19 @@ local function generate(minp, maxp, seed)
local zmax = math.min(math.floor(xlist[l*2]), maxp.z)
local i = (x-minp.x) * chulens + (zmin-minp.z) + 1
for z=zmin, zmax do
polygon_number[i] = n
polygons[i] = polygon
i = i + 1
n_filled = n_filled + 1
end
end
end
polygons[n] = {x=poly_x, z=poly_z, i={iA, iB, iC, iD}}
n = n + 1
end
end
local i = 1
for x = minp.x, maxp.x do
for z = minp.z, maxp.z do
local npoly = polygon_number[i]
if npoly then
local poly = polygons[npoly]
local poly = polygons[i]
if poly then
local xf, zf = geometry.transform_quadri(poly.x, poly.z, x/blocksize, z/blocksize)
if xf < 0 or xf > 1 or zf < 0 or zf > 1 then
print(xf, zf, x, z)