many worldgen mods and gonna try technic now

2026-09-13 03:30:48 -06:00
parent bac6ac94a3
commit 548749cb1a
4811 changed files with 163271 additions and 1 deletions
@@ -0,0 +1,65 @@
+-- If pos is located inside a cavern volume, returns the list of cavern definitions that
+-- are responsible for that cavern volume. If not inside a cavern volume returns an empty list.
+
+-- This is a somewhat expensive function, take care not to use it more than necessary
+subterrane.is_in_cavern = function(pos)
+	local results = {}
+	
+	for _, cave_layer_def in pairs(subterrane.registered_layers) do
+		local YMIN = cave_layer_def.y_min
+		local YMAX = cave_layer_def.y_max
+		local y = pos.y
+		if y <= YMAX and y >= YMIN then
+			local block_size = mapgen_helper.block_size
+			local BLEND = math.min(cave_layer_def.boundary_blend_range, (YMAX-YMIN)/2)
+			local TCAVE = cave_layer_def.cave_threshold
+			local np_cave = cave_layer_def.perlin_cave
+			local np_wave = cave_layer_def.perlin_wave
+			local y_blend_min = YMIN + BLEND * 1.5
+			local y_blend_max = YMAX - BLEND * 1.5	
+			local nval_cave = minetest.get_perlin(np_cave):get_3d(pos) --cave noise for structure
+			local nval_wave = minetest.get_perlin(np_wave):get_3d(pos) --wavy structure of cavern ceilings and floors
+			nval_cave = (nval_cave + nval_wave)/2
+			local cave_local_threshold
+			if y < y_blend_min then
+				cave_local_threshold = TCAVE + ((y_blend_min - y) / BLEND) ^ 2
+			elseif y > y_blend_max then
+				cave_local_threshold = TCAVE + ((y - y_blend_max) / BLEND) ^ 2
+			else
+				cave_local_threshold = TCAVE
+			end
+			if cave_layer_def.double_frequency and nval_cave < 0 then
+				nval_cave = -nval_cave
+			end
+			if nval_cave > cave_local_threshold then
+				table.insert(results, cave_layer_def)
+			end
+		end
+	end
+	
+	return results
+end
+
+-- returns the value of the cavern field at a particular location for a particular cavern definition.
+subterrane.get_cavern_value = function(name, pos)
+	local cave_layer_def = subterrane.registered_layers[name]
+	
+	local YMIN = cave_layer_def.y_min
+	local YMAX = cave_layer_def.y_max
+	local y = pos.y
+	if y > YMAX or y < YMIN then
+		return nil
+	end
+
+	local block_size = mapgen_helper.block_size
+	local BLEND = math.min(cave_layer_def.boundary_blend_range, (YMAX-YMIN)/2)
+	local TCAVE = cave_layer_def.cave_threshold
+	local np_cave = cave_layer_def.perlin_cave
+	local np_wave = cave_layer_def.perlin_wave
+	local y_blend_min = YMIN + BLEND * 1.5
+	local y_blend_max = YMAX - BLEND * 1.5	
+	local nval_cave = minetest.get_perlin(np_cave):get_3d(pos) --cave noise for structure
+	local nval_wave = minetest.get_perlin(np_wave):get_3d(pos) --wavy structure of cavern ceilings and floors
+	nval_cave = (nval_cave + nval_wave)/2
+	return nval_cave
+end