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mods/floating_anchor/init.lua

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+--- floating_anchor
+-- @module floating_anchor
+-- @release 0.5
+-- @copyright 2018 Starbeamrainbowlabs
+-- @license Mozilla Public License, 2.0 (MPL-2.0)
+-- @author Starbeamrainbowlabs
+
+local function log_message(level, msg)
+	minetest.log(level, "[floating-anchor] " .. msg)
+end
+
+local function do_anchor_place(itemstack, player, pointed_thing)
+	
+	-- user.getpos() -> {x, y, z}
+	
+	-- Figure out where to put the anchor
+	local place_position = player:getpos()
+	place_position.y = place_position.y - 0.8
+	log_message("action", string.format("(%d, %d, %d)", place_position.x, place_position.y, place_position.z))
+	
+	-- Place the floating anchor in the world
+	local node_to_check = minetest.get_node(place_position)
+	if node_to_check.name == "air" then
+		minetest.set_node(place_position, { name = "floating_anchor:floating_anchor" })
+		-- Take an item from the player's stack & return the new stack with 1 fewer items in it
+		itemstack:take_item(1)
+	end
+	
+	return itemstack
+end
+
+minetest.register_node("floating_anchor:floating_anchor", {
+	description = "Floating Anchor (node - don't use)",
+	tiles = {"floating-anchor.png"},
+	groups = {
+		cracky = 1,
+		not_in_creative_inventory = 1,
+		oddly_breakable_by_hand = 2
+	},
+	drop = "floating_anchor:floating_anchor_item"
+})
+
+minetest.register_craftitem("floating_anchor:floating_anchor_item", {
+	description = "Floating Anchor",
+	_doc_items_longdesc = "A strange floating anchor that can be placed in mid-air.",
+	_doc_items_usagehelp = "Right click to place it beneath your feet when flying (or falling).",
+	inventory_image = "[inventorycube{floating-anchor.png{floating-anchor.png{floating-anchor.png",
+	wield_image = "floating-anchor.png",
+	visual = "cube",
+	on_place = do_anchor_place,
+	on_secondary_use = do_anchor_place
+})
+
+minetest.register_craft({
+	output = "floating_anchor:floating_anchor_item",
+	recipe = {
+		{"group:wool", "group:wool", "group:wool"},
+		{"group:wool", "default:steel_ingot", "group:wool"},
+		{"group:wool", "group:wool", "group:wool"},
+	}
+})
+
+log_message("info", "Loaded!")