Split source code to init mapgen and register.

register.lua

@@ -0,0 +1,62 @@
+-- global table and register_* functions
+
+rocks = {}
+
+rocks.layers = {}
+rocks.veins = {}
+rocks.ores = {}
+
+rocks.register_layer=function(name,params,rock)
+ assert(name)
+ assert(params)
+ assert(params.gain)
+ assert(params.height)
+ local maxheight
+ for ln,ld in pairs(rocks.layers) do
+  if (ld.height<params.height)and ((not ld.maxheight) or (ld.maxheight>params.height)) then ld.maxheight=params.height end
+  if (ld.height>params.height)and((not maxheight) or (maxheight>ld.height)) then maxheight=ld.height end
+ end
+ rocks.layers[name]= {
+  gain=params.gain,
+  height=params.height,
+  maxheight=maxheight,
+  limit=params.limit,
+  seed=params.seed,
+  rock={ block=rock },
+  veins={}
+ }
+ print("[rocks] layer "..name)
+end
+
+rocks.register_vein=function(name,params)
+ assert(name)
+ assert(params)
+ assert(not rocks.veins[name])
+ rocks.veins[name]={
+  np={
+   offset=0, scale=1, octaves=1, presist=0.8,
+   spread=params.spread, seed=params.seed
+  },
+  treshold=params.treshold,
+  hmin=params.hmin, hmax=params.hmax,
+  layers=params.layers,
+  ores={}
+ }
+ for ln,ld in pairs(rocks.layers) do
+  ld.veins[name]=rocks.veins[name]
+ end
+ print("[rocks] vein "..name)
+end
+
+rocks.register_ore=function( vein, node, params )
+ -- params= {treshold=0,    chance=1  }
+ ore={ node=node }
+ if params.treshold and (params.treshold>rocks.veins[vein].treshold) then
+  ore.treshold=params.treshold
+ end
+ if params.chance and (params.chance<1) then
+  ore.chance=params.chance
+ end
+ table.insert(rocks.veins[vein].ores, ore)
+ print("[rocks] ore "..node.." in "..vein.." chance="..(ore.chance or "1").." treshold="..(ore.treshold or rocks.veins[vein].treshold))
+end