From 7000c5220d9ce8864e028d3b035d86040e7de7aa Mon Sep 17 00:00:00 2001
From: orwell96 <orwell@bleipb.de>
Date: Sun, 18 Oct 2020 15:27:55 +0200
Subject: Initial working state

---
 struct_register.lua | 67 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 struct_register.lua

(limited to 'struct_register.lua')

diff --git a/struct_register.lua b/struct_register.lua
new file mode 100644
index 0000000..1143753
--- /dev/null
+++ b/struct_register.lua
@@ -0,0 +1,67 @@
+-- struct_register.lua - registration callbacks for structures.
+
+--[[
+The cellworld table contains the following structure-related entries:
+cellworld = {
+	structures = {
+		[st_name] = {...} -- all registered structures.
+	}
+	structure_set = {
+		-- the active structure set config, which determines grid size, mapgen base node a.s.o as passed to config_structure_set()
+		name = "foo" -- name of the active structure set (which is actually the first parameter), not specified in table.
+		grid_size = 7 -- how many nodes form a cell.
+		mapgen_base_node = "air" -- which node to place by default in map, passed to singlenode mg. TODO not implemented yet.
+	}
+	-- the most important settings from structure set are copied for easier access
+	grid_size = structure_set.grid_size,
+	
+	-- of all registered structures, the maximum extents in x, y and z direction.
+	maximum_structure_size = vector.new(1,1,1)
+}
+]]--
+
+cellworld.structures = {}
+
+function cellworld.config_structure_set(name, definition)
+	if cellworld.structure_set then
+		error("Cellworld: Trying to register structure set '"..name.."', but '"..cellworld.structure_set.name..
+			"' has already been registered. There can only be one active structure set at a time.")
+	end
+	cellworld.structure_set = {
+		name = name,
+		grid_size = 9,
+		seed_structure = definition.seed_structure,
+	}
+	if definition.grid_size then
+		cellworld.structure_set.grid_size = definition.grid_size
+	end
+	
+	cellworld.grid_size = cellworld.structure_set.grid_size
+	
+	cellworld.maximum_structure_size = vector.new(1,1,1)
+end
+
+function cellworld.register_structure(name, def)
+	-- make definition checks
+	if not cellworld.structure_set then
+		error("Cellworld: can not register structures when config_structure_set() hasn't been called!")
+	elseif def.structure_set and def.structure_set ~= cellworld.structure_set.name then
+		error("Cellworld: Structure '"..name.."' can not be registered because the structure set it was defined for ('"..name..
+			"') doesn't match the active structure set ('"..cellworld.structure_set.name.."')!")
+	end
+	
+	if not def.chance then
+		def.chance = 50
+	end
+	
+	-- TODO validate structure of cells
+	
+	cellworld.structures[name] = def
+	
+	-- update maxstructsize
+	local mss = cellworld.maximum_structure_size
+	mss.x = math.max(def.size.x, mss.x)
+	mss.y = math.max(def.size.y, mss.y)
+	mss.z = math.max(def.size.z, mss.z)
+	
+end
-- 
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