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mapgen_rivers
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Avoid some redundant calculation on corners 

(not very significant, but why not)
This commit is contained in:
Gael-de-Sailly 2020-04-27 21:08:15 +02:00
parent a9ab0e53d3
commit a73a0dd80b
2 changed files with 8 additions and 8 deletions
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14
init.lua
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@ -60,9 +60,9 @@ local function generate(minp, maxp, seed)
xf - r_east,
zf - r_south,
c_NW-xf-zf,
c_NE+xf-zf-1,
c_SE+xf+zf-2,
c_SW-xf+zf-1,
xf-zf-c_NE,
xf+zf-c_SE,
zf-xf-c_SW,
}
-- Find the maximal depth factor and determine to which river it belongs
@ -77,10 +77,10 @@ local function generate(minp, maxp, seed)
-- Transform the coordinates to have xf and zf = 0 or 1 in rivers (to avoid rivers having lateral slope and to accomodate the surrounding smoothly)
if imax == 0 then
local x0 = math.max(r_west, c_NW-zf, c_SW+zf-1)
local x1 = math.min(r_east, 1-c_NE+zf, 2-c_SE-zf)
local z0 = math.max(r_north, c_NW-xf, c_NE+xf-1)
local z1 = math.min(r_south, 1-c_SW+xf, 2-c_SE-xf)
local x0 = math.max(r_west, c_NW-zf, zf-c_SW)
local x1 = math.min(r_east, c_NE+zf, c_SE-zf)
local z0 = math.max(r_north, c_NW-xf, xf-c_NE)
local z1 = math.min(r_south, c_SW+xf, c_SE-xf)
xf = (xf-x0) / (x1-x0)
zf = (zf-z0) / (z1-z0)
elseif imax == 1 then

2
polygons.lua
View File

@ -150,7 +150,7 @@ local function make_polygons(minp, maxp)
local riverB = river_width(rivers[iB])
local riverC = river_width(rivers[iC])
local riverD = river_width(rivers[iD])
polygon.river_corners = {riverA, riverB, riverC, riverD}
polygon.river_corners = {riverA, 1-riverB, 2-riverC, 1-riverD}
-- Flow directions
local dirA, dirB, dirC, dirD = dirs[iA], dirs[iB], dirs[iC], dirs[iD]