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README.md

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+# Stapled Bread
+
+## Description
+
+![Screenshot](https://raw.githubusercontent.com/SmallJoker/stapled_bread/master/screenshot.png)
+
+This Minetest mod makes it possible to staple bread to trees. Enjoy.
+To staple the regular bread, craft it to slices and staple it to the tree.
+
+License: CC0
+
+## Craft recipes
+1. Download and install a craft guide

depends.txt

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+farming

init.lua

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+local function try_staple(itemstack, placer, pointed)
+	if pointed.type ~= "node" then
+		return
+	end
+	if pointed.above.y - pointed.under.y ~= 0 then
+		return
+	end
+
+	-- Node under must be a tree
+	local node_under = minetest.get_node(pointed.under)
+	local def_under = minetest.registered_nodes[node_under.name] or {}
+	if not def_under.groups or not def_under.groups.tree then
+		return
+	end
+	if def_under.paramtype2 == "facedir"
+			or def_under.paramtype2 == "colorfacedir" then
+		-- Only vertical facedirs are allowed
+		local dir = minetest.wallmounted_to_dir(node_under.param2)
+		if dir.x ~= 0 or dir.z ~= 0 then
+			return
+		end
+	end
+
+	-- Node above must be airlike, but not ignore
+	local node_above = minetest.get_node(pointed.above)
+	local def_above = minetest.registered_nodes[node_above.name] or {}
+	if node_above.name == "ignore" or not def_above.buildable_to then
+		return
+	end
+
+	-- Staple to the tree
+	local dir = vector.direction(pointed.above, pointed.under)
+	local obj = minetest.add_entity(
+		vector.add(vector.multiply(dir, 0.49), pointed.above),
+		"stapled_bread:bread_slice"
+	)
+	if obj then
+		local entity = obj:get_luaentity()
+		if not creative or not creative.is_enabled_for(
+				placer:get_player_name()) then
+			itemstack:take_item(1)
+		end
+		entity.object:set_yaw(math.atan2(-dir.x, dir.z))
+	end
+	return itemstack
+end
+
+minetest.register_entity("stapled_bread:bread_slice", {
+	visual = "wielditem",
+	textures = { "farming:bread" },
+	visual_size = {x = 0.2, y = 0.2},
+	physical = false,
+	collisionbox = {-0.1, -0.1, -0.1, 0.1, 0.1, 0.1},
+	selectionbox = {-0.1, -0.1, -0.1, 0.1, 0.1, 0.1}
+})
+
+minetest.override_item("farming:bread", {
+	on_place = function(itemstack, placer, pointed_thing)
+		return try_staple(itemstack, placer, pointed_thing) or itemstack
+	end
+})