Add cave stones.

mapgen.lua

@@ -63,6 +63,17 @@ do
 	end
 end
 
+local cave_stones = {
+	"loud_walking:stone_with_moss",
+	"loud_walking:stone_with_lichen",
+	"loud_walking:stone_with_algae",
+	"loud_walking:stone_with_salt",
+}
+local mushroom_stones = {}
+mushroom_stones[node("default:stone")] = true
+mushroom_stones[node("loud_walking:stone_with_algae")] = true
+mushroom_stones[node("loud_walking:stone_with_lichen")] = true
+
 local function place_schematic(pos, schem, center)
 	local yslice = {}
 	if schem.yslice_prob then
@@ -178,7 +189,7 @@ local function get_biome(px, pz)
 	end
 	local biome = biome_names[rarity][math.random(#biome_names[rarity])]
 	return biome
-	--return "glacier"
+	--return "sandstone_grassland"
 end
 
 local function get_decoration(biome)
@@ -227,6 +238,10 @@ function loud_walking.generate(p_minp, p_maxp, seed)
 	local px = math.floor((minp.x + 32) / csize.x)
 	local pz = math.floor((minp.z + 32) / csize.z)
 	local biome = get_biome(px, pz)
+	local cave_lining = cave_stones[math.random(#cave_stones)]
+	if math.random(3) == 1 then
+		cave_lining = nil
+	end
 
 	local node_top = biomes[biome].node_top or "default:dirt_with_grass"
 	local node_filler = biomes[biome].node_filler or "default:dirt"
@@ -281,7 +296,7 @@ function loud_walking.generate(p_minp, p_maxp, seed)
 						lightmap[ivm] = 0
 						in_cave = false
 					elseif math.min(dx, csize.x - dx) + math.min(dy, csize.y - dy) + math.min(dz, csize.z - dz) < bevel + 1 then
-						if dy < half then
+						if biome ~= "underground" and dy < half then
 							data[ivm] = node("loud_walking:scrith")
 							lightmap[ivm] = 0
 						else
@@ -293,7 +308,7 @@ function loud_walking.generate(p_minp, p_maxp, seed)
 						if math.abs(dy - half - 2) < 2 and (dz == half or dx == half) then
 							data[ivm] = node("air")
 						else
-							if dy < half then
+							if biome ~= "underground" and dy < half then
 								data[ivm] = node("loud_walking:scrith")
 								lightmap[ivm] = 0
 							else
@@ -331,10 +346,11 @@ function loud_walking.generate(p_minp, p_maxp, seed)
 						data[ivm] = node("air")
 						in_cave = false
 					elseif cave[index3d] ^ 2 > (biome == "underground" and 0.5 or 1.3 - math.sin(dy / (half * 0.2))) then
+						cave_height = cave_height + 1
 						if terr + ground >= dy and not in_cave and dy > terr + ground - 10 then
 							data[ivm] = node(node_top)
 						elseif dy == 1 then
-							if not ocean and not swamp and not beach and math.random(6) == 1 then
+							if not cave_lining and not ocean and not swamp and not beach and biome ~= "glacier" and math.random(6) == 1 then
 								data[ivm] = node("default:lava_source")
 							elseif ocean or swamp or beach then
 								data[ivm] = node(node_filler)
@@ -343,16 +359,16 @@ function loud_walking.generate(p_minp, p_maxp, seed)
 							data[ivm] = node("loud_walking:glowing_fungal_stone")
 						elseif (ocean or swamp or beach) and dy < half then
 							data[ivm] = node(node_water)
-						elseif cave_height == 2 and node_filler == "default:dirt" and data[ivm - 3] == node(node_stone) and math.random(40) == 1 then
+						elseif cave_height == 3 and node_filler == "default:dirt" and mushroom_stones[data[ivm - 3 * a.ystride]] and math.random(40) == 1 then
 							data[ivm] = node("loud_walking:giant_mushroom_cap")
 							data[ivm - a.ystride] = node("loud_walking:giant_mushroom_stem")
 							data[ivm - 2 * a.ystride] = node("loud_walking:giant_mushroom_stem")
 							data[ivm - 3 * a.ystride] = node(node_filler)
-						elseif cave_height == 1 and node_filler == "default:dirt" and data[ivm - 3] == node(node_stone) and math.random(20) == 1 then
+						elseif cave_height == 2 and node_filler == "default:dirt" and mushroom_stones[data[ivm - 2 * a.ystride]] and math.random(20) == 1 then
 							data[ivm] = node("loud_walking:huge_mushroom_cap")
 							data[ivm - a.ystride] = node("loud_walking:giant_mushroom_stem")
 							data[ivm - 2 * a.ystride] = node(node_filler)
-						elseif not in_cave and node_stone == "default:stone" and math.random(10) == 1 then
+						elseif not in_cave and node_stone == "default:stone" and not cave_lining and math.random(10) == 1 then
 							data[ivm] = node("loud_walking:stalagmite")
 						elseif not in_cave and node_stone == "default:ice" and math.random(10) == 1 then
 							data[ivm] = node("loud_walking:icicle_up")
@@ -361,6 +377,9 @@ function loud_walking.generate(p_minp, p_maxp, seed)
 						end
 						in_cave = true
 						lightmap[ivm] = 0
+					elseif cave_lining and cave[index3d] ^ 2 > (biome == "underground" and 0.4 or 1.2 - math.sin(dy / (half * 0.2))) then
+						data[ivm] = node(cave_lining)
+						lightmap[ivm] = 0
 					elseif dy > terr + ground - depth_top then
 						data[ivm] = node(node_top)
 						lightmap[ivm] = 0
@@ -375,7 +394,7 @@ function loud_walking.generate(p_minp, p_maxp, seed)
 						data[ivm] = node(node_stone)
 						if in_cave and node_stone == "default:stone" and math.random(20) == 1 then
 							data[ivm] = node("loud_walking:glowing_fungal_stone")
-						elseif in_cave and not (ocean or swamp or beach) and node_stone == "default:stone" and math.random(10) == 1 then
+						elseif in_cave and not (ocean or swamp or beach) and node_stone == "default:stone" and not cave_lining and math.random(10) == 1 then
 							data[ivm - a.ystride] = node("loud_walking:stalactite")
 						elseif in_cave and not (ocean or swamp or beach) and node_stone == "default:ice" and math.random(10) == 1 then
 							data[ivm - a.ystride] = node("loud_walking:icicle_down")
@@ -390,9 +409,7 @@ function loud_walking.generate(p_minp, p_maxp, seed)
 					write = true
 				end
 
-				if in_cave then
-					cave_height = cave_height + 1
-				else
+				if not in_cave then
 					cave_height = 0
 				end
 				ivm = ivm + a.ystride