Geodes Library

Register a geode:

geodes_lib:register_geode({ wherein = node in which geodes generate, set to mapgen_stone unless you need it to spawn in a specific place, y_min = minimum level at which geodes generate, y_max = maximum level at which geodes generate, scarcity = rarity of geodes, rarest at 80, lower values not recommended unless you use generation chance, core = node comprising innermost part of geode, usually a crystal such as amethyst, core_alt = replacement for node comprising innermost part of geode, usually a budding node which spawns plantlike drawtype crystal nodes on all sides, core_alt_chance = chance of core_alt replacing core, shell = array of nodes comprising geode shell, from outermost to innermost, radius_min = minimum radius of geode cavity, radius_max = maximum radius of geode cavity, generation_chance = % chance a geode spawns given other conditions, lets geodes be even rarer, })

Example:

geodes_lib:register_geode({ wherein = "mapgen_stone", y_min = -31000, y_max = -10, scarcity = 80, core = "modname:citrine", core_alt = "modname:citrine_budding", core_alt_chance = 100, shell = {"modname:limestone", "modname:calcite"}, radius_min = 2, radius_max = 10, generation_chance = 50, -- set to around 10 if you are adding 20 or more geodes this way })