mtcontrib/mapgen_rivers
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Reverse axes order for heightmaps (iterate in Z direction first instead of X)

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Gaël de Sailly
2020-07-21 12:46:23 +02:00
parent 6f43430574
commit 25c5cb2e1f
3 changed files with 41 additions and 40 deletions
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13
heightmap.lua
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@ -7,6 +7,8 @@ local blocksize = mapgen_rivers.blocksize
local sea_level = mapgen_rivers.sea_level
local riverbed_slope = mapgen_rivers.riverbed_slope
local MAP_BOTTOM = -31000
-- Linear interpolation
local function interp(v00, v01, v11, v10, xf, zf)
local v0 = v01*xf + v00*(1-xf)
@ -17,15 +19,14 @@ end
local function heightmaps(minp, maxp)
local polygons = make_polygons(minp, maxp)
local incr = maxp.x-minp.x+1
local i0 = (minp.z-minp.z) * incr + (minp.x-minp.x) + 1
local incr = maxp.z-minp.z+1
local terrain_height_map = {}
local lake_height_map = {}
local i = 1
for x=minp.x, maxp.x do
for z=minp.z, maxp.z do
for z=minp.z, maxp.z do
for x=minp.x, maxp.x do
local poly = polygons[i]
if poly then
@ -106,8 +107,8 @@ local function heightmaps(minp, maxp)
terrain_height_map[i] = terrain_height
lake_height_map[i] = lake_height
else
terrain_height_map[i] = -31000
lake_height_map[i] = -31000
terrain_height_map[i] = MAP_BOTTOM
lake_height_map[i] = MAP_BOTTOM
end
i = i + 1
end