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valleys_mapgen
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Put actual snow on the snowy areas.

master
Duane Robertson 2016-01-16 18:26:56 -06:00
parent ff28f30766
commit a4bb845d97
1 changed files with 21 additions and 15 deletions
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36
mapgen_c.lua
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@ -314,10 +314,15 @@ function vmg.generate(minp, maxp, seed)
local ivm = a:index(x, y, z) -- index of the data array, matching the position {x, y, z}
local ground = math.max(heightmap[i2d], 0) - 5
if data[ivm] == c_snow_layer then
data[ivm] = c_air
end
-- Replace dirt and sand nodes appropriately.
if data[ivm] == c_dirt or data[ivm] == c_dry or data[ivm] == c_lawn or data[ivm] == c_snow or data[ivm] == c_sand then
-- a top node
if y >= ground and (data[ivm + ystride] == c_air or data[ivm + ystride] == c_snow_layer) then
if y >= ground and data[ivm + ystride] == c_air then
-- Humidity and temperature are simplified from the original,
-- and derived from the actual mapgen.
local humidity = 2 ^ (v13 - v15 + (humiditymap[i2d] / 25) - 2)
@ -329,6 +334,20 @@ function vmg.generate(minp, maxp, seed)
humidity = humidity * (1 + (5 - y) * 10)
end
-- Replace the nodes.
if data[ivm] == c_dirt then
data[ivm] = dirt
else
if temperature < 1 then
data[ivm] = snow
data[ivm + ystride] = c_snow_layer
elseif humidity < dry_dirt_threshold then
data[ivm] = dry
else
data[ivm] = lawn
end
end
v2 = math.abs(v2) - river_size -- v2 represents the distance from the river, in arbitrary units.
-- Most of the terrain noises are unavailable.
@ -360,20 +379,7 @@ function vmg.generate(minp, maxp, seed)
water = 0,
thickness = 0 }
vmg.choose_generate_plant(conditions, {x=x,y=y+1,z=z}, data, a, ivm + ystride)
-- Replace the nodes.
if data[ivm] == c_dirt then
data[ivm] = dirt
else
if temperature < 1 then
data[ivm] = snow
elseif humidity < dry_dirt_threshold then
data[ivm] = dry
else
data[ivm] = lawn
end
end
vmg.choose_generate_plant(conditions, {x=x,y=y,z=z}, data, a, ivm + ystride)
else
if data[ivm] == c_dirt or data[ivm] == c_sand then
data[ivm] = dirt