add fine floor fungus, variety to the lava sea

biomes/lava_sea.lua

@@ -10,55 +10,89 @@ local c_mesecry = minetest.get_content_id("dfcaverns:glow_mese")
 
 -------------------------------------------------------------------------------------------
 
-local lava_ceiling = function(area, data, ai, vi, bi)
-	if math.random() < 0.005 then
-		subterrane:giant_stalactite(ai, area, data, 6, 13, c_meseore, c_meseore, c_mesecry)
+local mese_crystal_ceiling = function(area, data, ai, vi, bi)
+	if math.random() < 0.025 then
+		if math.random() < 0.25 then
+			subterrane:giant_stalactite(ai, area, data, 6, 13, c_meseore, c_meseore, c_mesecry)
+		else
+			data[vi] = c_meseore
+			if math.random() < 0.25 then
+				data[bi] = c_mesecry
+			end
+		end		
+	end
+end
+
+local mese_ore_ceiling = function(area, data, ai, vi, bi)
+	if math.random() < 0.025 then
+		data[vi] = c_meseore
+		if math.random() < 0.25 then
+			data[bi] = c_mesecry
+		end
+	end
+end
+
+local mese_ore_floor = function(area, data, ai, vi, bi)
+	if math.random() < 0.01 then
+		data[vi] = c_meseore
+		if math.random() < 0.25 then
+			data[ai] = c_mesecry
+		end
 	end
 end
 
 
-local lava_sea_biome_def = {
+local lava_sea_crystal_biome_def = {
+	name = "dfcaverns_lava_sea_with_mese_crystal",
+	y_min = dfcaverns.config.lava_sea_min,
+	y_max = dfcaverns.config.lava_sea_max,
+	heat_point = 80,
+	humidity_point = 20,
+	_subterrane_ceiling_decor = mese_crystal_ceiling,
+	_subterrane_floor_decor = mese_ore_floor,
+}
+
+local lava_sea_mese_biome_def = {
+	name = "dfcaverns_lava_sea_with_mese",
+	y_min = dfcaverns.config.lava_sea_min,
+	y_max = dfcaverns.config.lava_sea_max,
+	heat_point = 60,
+	humidity_point = 40,
+	_subterrane_ceiling_decor = mese_ore_ceiling,
+}
+
+local lava_sea_barren_biome_def = {
 	name = "dfcaverns_lava_sea",
 	y_min = dfcaverns.config.lava_sea_min,
 	y_max = dfcaverns.config.lava_sea_max,
-	heat_point = 50,
+	heat_point = 40,
 	humidity_point = 50,
-	_subterrane_ceiling_decor = lava_ceiling,
 }
 
-minetest.register_biome(lava_sea_biome_def)
 
-local airspace = (dfcaverns.config.lava_sea_max - dfcaverns.config.lava_sea_min) / 3
+minetest.register_biome(lava_sea_crystal_biome_def)
+minetest.register_biome(lava_sea_mese_biome_def)
+minetest.register_biome(lava_sea_barren_biome_def)
+
+local airspace = (dfcaverns.config.lava_sea_max - dfcaverns.config.lava_sea_min) / 2.75
+local lava_sea_level = dfcaverns.config.lava_sea_max - airspace
 
 local data = {}
 
 minetest.register_on_generated(function(minp, maxp, seed)
 	--if out of range of cave definition limits, abort
-	if minp.y > dfcaverns.config.lava_sea_max - airspace or maxp.y < dfcaverns.config.lava_sea_min then
+	if minp.y > lava_sea_level or maxp.y < dfcaverns.config.lava_sea_min then
 		return
 	end
-		
-	--easy reference to commonly used values
-	local t_start = os.clock()
-	local x_max = maxp.x
-	local y_max = maxp.y
-	local z_max = maxp.z
-	local x_min = minp.x
-	local y_min = minp.y
-	local z_min = minp.z
-		
+	
 	local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
 	local area = VoxelArea:new{MinEdge=emin, MaxEdge=emax}
 	vm:get_data(data)
-		
-	for z = z_min, z_max do -- for each xy plane progressing northwards
-		for y = y_min, y_max do -- for each x row progressing upwards
-			local vi = area:index(x_min, y, z) --current node index
-			for x = x_min, x_max do -- for each node do
-				if data[vi] == c_air or data[vi] == c_water then
-					data[vi] = c_lava
-				end
-				vi = vi + 1
+	
+	for vi, x, y, z in area:iterp_xyz(minp, maxp) do
+		if y < lava_sea_level + math.random(0,3) then
+			if data[vi] == c_air or data[vi] == c_water then
+				data[vi] = c_lava
 			end
 		end
 	end
@@ -68,6 +102,8 @@ minetest.register_on_generated(function(minp, maxp, seed)
 	--calc lighting
 	vm:set_lighting({day = 0, night = 0})
 	vm:calc_lighting()
+	
+	vm:update_liquids()
 	--write it to world
 	vm:write_to_map()
 end)

features/ground_cover.lua

@@ -63,11 +63,35 @@ minetest.register_node("dfcaverns:cobble_with_floor_fungus", {
 	}),
 })
 
+minetest.register_node("dfcaverns:cobble_with_floor_fungus_fine", {
+	description = S("Cobblestone With Floor Fungus"),
+	_doc_items_longdesc = dfcaverns.doc.floor_fungus_desc,
+	_doc_items_usagehelp = dfcaverns.doc.floor_fungus_usage,
+	tiles = {"default_cobble.png^dfcaverns_floor_fungus_fine.png"},
+	drops = "default:cobble",
+	is_ground_content = true,
+	groups = {cracky = 3, stone = 2, slippery = 1, light_sensitive_fungus = 11},
+	_dfcaverns_dead_node = "default:cobble",
+	sounds = default.node_sound_stone_defaults({
+		footstep = {name = "dfcaverns_squish", gain = 0.25},
+	}),
+})
+
 minetest.register_abm{
 	label = "dfcaverns:floor_fungus_spread",
 	nodenames = {"default:cobble"},
 	neighbors = {"dfcaverns:cobble_with_floor_fungus"},
 	interval = 60,
+	chance = 5,
+	catch_up = true,
+	action = function(pos)
+		minetest.swap_node(pos, {name="dfcaverns:cobble_with_floor_fungus_fine"})
+	end,
+}
+minetest.register_abm{
+	label = "dfcaverns:floor_fungus_thickening",
+	nodenames = {"default:cobble_with_floor_fungus_fine"},
+	interval = 59,
 	chance = 30,
 	catch_up = true,
 	action = function(pos)

init.lua

@@ -6,6 +6,7 @@ local modpath = minetest.get_modpath(minetest.get_current_modname())
 --load companion lua files
 dofile(modpath.."/config.lua")
 dofile(modpath.."/doc.lua")
+dofile(modpath.."/voxelarea_iterator.lua")
 
 dofile(modpath.."/features/ground_cover.lua")
 dofile(modpath.."/features/glow_worms.lua")

voxelarea_iterator.lua

@@ -0,0 +1,75 @@
+-- These functions are a minor modification of the voxel area iterator defined in the built in voxelarea.lua lua code.
+-- As such, this file is separately licened under the LGPL as follows:
+
+-- License of Minetest source code
+-------------------------------
+
+--Minetest
+--Copyright (C) 2010-2018 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+--This program is free software; you can redistribute it and/or modify
+--it under the terms of the GNU Lesser General Public License as published by
+--the Free Software Foundation; either version 2.1 of the License, or
+--(at your option) any later version.
+
+--This program is distributed in the hope that it will be useful,
+--but WITHOUT ANY WARRANTY; without even the implied warranty of
+--MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+--GNU Lesser General Public License for more details.
+
+--You should have received a copy of the GNU Lesser General Public License along
+--with this program; if not, write to the Free Software Foundation, Inc.,
+--51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+function VoxelArea:iter_xyz(minx, miny, minz, maxx, maxy, maxz)
+	local i = self:index(minx, miny, minz) - 1
+	
+	local x = minx - 1 -- subtracting one because x gets incremented before it gets returned the first time.
+	local xrange = maxx - minx + 1
+	local nextaction = i + 1 + xrange
+
+	local y = 0
+	local yrange = maxy - miny + 1
+	local yreqstride = self.ystride - xrange
+
+	local z = 0
+	local zrange = maxz - minz + 1
+	local multistride = self.zstride - ((yrange - 1) * self.ystride + xrange)
+
+	return function()
+		-- continue i until it needs to jump
+		i = i + 1
+		x = x + 1
+		if i ~= nextaction then
+			return i, x, y+miny, z+minz
+		end
+
+		-- continue y until maxy is exceeded
+		y = y + 1
+		x = minx -- new line
+		if y ~= yrange then
+			-- set i to index(minx, miny + y, minz + z) - 1
+			i = i + yreqstride
+			nextaction = i + xrange
+			return i, x, y+miny, z+minz
+		end
+
+		-- continue z until maxz is exceeded
+		z = z + 1
+		if z == zrange then
+			-- cuboid finished, return nil
+			return
+		end
+
+		-- set i to index(minx, miny, minz + z) - 1
+		i = i + multistride
+
+		y = 0
+		nextaction = i + xrange
+		return i, x, y+miny, z+minz
+	end
+end
+
+function VoxelArea:iterp_xyz(minp, maxp)
+	return self:iter_xyz(minp.x, minp.y, minp.z, maxp.x, maxp.y, maxp.z)
+end