mtcontrib/mapgen_rivers
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Draw outer corners of river turns.

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Gael-de-Sailly 2020-04-13 15:01:54 +02:00
parent b5db63d267
commit da98a538bb
1 changed files with 36 additions and 0 deletions
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36
init.lua
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@ -187,6 +187,25 @@ local function generate(minp, maxp, seed)
river_south = mean
end
polygon.rivers = {river_west, river_north, river_east, river_south}
local around = {0,0,0,0,0,0,0,0}
if zp > 0 then
around[1] = river_width(bounds_z[iA-X])
around[2] = river_width(bounds_z[iB-X])
end
if xp < X-2 then
around[3] = river_width(bounds_x[iB-zp])
around[4] = river_width(bounds_x[iC-zp-1])
end
if zp < Z-2 then
around[5] = river_width(bounds_z[iC])
around[6] = river_width(bounds_z[iD])
end
if xp > 0 then
around[7] = river_width(bounds_x[iD-zp-2])
around[8] = river_width(bounds_x[iA-zp-1])
end
polygon.river_corners = {math.max(around[8], around[1]), math.max(around[2], around[3]), math.max(around[4], around[5]), math.max(around[6], around[7])}
end
end
@ -215,6 +234,23 @@ local function generate(minp, maxp, seed)
zf = 0
end
if not is_river then
local c_NW, c_NE, c_SE, c_SW = unpack(poly.river_corners)
if xf+zf <= c_NW then
is_river = true
xf, zf = 0, 0
elseif 1-xf+zf <= c_NE then
is_river = true
xf, zf = 1, 0
elseif 2-xf-zf <= c_SE then
is_river = true
xf, zf = 1, 1
elseif xf+1-zf <= c_SW then
is_river = true
xf, zf = 0, 1
end
end
if not is_river then
xf = (xf-r_west) / (r_east-r_west)
zf = (zf-r_north) / (r_south-r_north)