add heightmap write-only property 'noiseSeed'

res/generators/default.lua

@@ -7,15 +7,18 @@ layers = {
     {block="base:bazalt", height=1},
 }
 
-function generate_heightmap(x, y, w, h)
+function generate_heightmap(x, y, w, h, seed)
     local umap = Heightmap(w, h)
     local vmap = Heightmap(w, h)
+    umap.noiseSeed = seed
+    vmap.noiseSeed = seed
     umap:noise({x+521, y+73}, 0.05, 1, 20.8)
     umap:noise({x+51, y+75}, 0.05, 1, 21.8)
     vmap:noise({x+521, y+70}, 0.1, 3, 35.8)
     vmap:noise({x+95, y+246}, 0.15, 3, 35.8)
 
     local map = Heightmap(w, h)
+    map.noiseSeed = seed
     map:noise({x, y}, 0.02, 7, 0.2)
     map:noise({x, y}, 0.06, 8, 0.4, umap, vmap)
     map:mul(0.5)
@@ -23,6 +26,7 @@ function generate_heightmap(x, y, w, h)
     map:pow(2.0)
 
     local rivermap = Heightmap(w, h)
+    rivermap.noiseSeed = seed
     rivermap:noise({x+21, y+12}, 0.1, 4)
     rivermap:abs()
     rivermap:mul(2.0)