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diff --git a/depends.txt b/depends.txt
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+default
+
diff --git a/description.txt b/description.txt
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+++ b/description.txt
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+This mod adds arc-nodes to Minetest as well as arcs for inner and outer corners.
+
+Provided nodes:
+
+default:cobble
+default:mossycobble
+
+default:stone
+default:stonebrick
+default:stone_block
+
+default:desert_cobble
+default:desert_stone
+default:desert_stonebrick
+default:desert_stone_block
+
+default:sandstone
+default:sandstonebrick
+default:sandstone_block
+
+default:brick
+
+default:obsidian
+default:obsidianbrick
+default:obsidian_block
+
+default:wood
+default:junglewood
+default:pine_wood
+default:acacia_wood
+default:aspen_wood
+
+
+To make arcs from nodes of your mod, put "pkarcs?" into your depends.txt,
+and call this function in your init.lua:
+
+if minetest.get_modpath("pkarcs") then
+	pkarcs.register_node("your_mod:your_nodename")
+end
+
+Tested with Minetest 0.4.15
+
+---
+
+PEAK
+01-20-2017
+
diff --git a/init.lua b/init.lua
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+++ b/init.lua
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+-- [Mod] Simple Arcs [pkarcs]
+-- by PEAK
+-- 06-05-2017
+
+
+--[[
+
+	This mod adds arc-nodes to Minetest as well as arcs for inner and outer
+	corners, based on the default stone and wood materials.
+	
+	To make arcs from nodes of your mod, put "pkarcs?" into your depends.txt,
+	and call this function in your init.lua:
+
+if minetest.get_modpath("pkarcs") then
+	pkarcs.register_node("your_mod:your_nodename")
+end
+
+	works with Minetest 0.4.16
+
+--]]
+
+
+pkarcs = {}
+
+-- convert integer coordinates to nodebox coordinates
+
+function nb(n)
+	return n/16-1/2
+end
+
+-- define nodes
+
+function pkarcs.register_all(nodename, desc, tile, sound, group, craftmaterial)
+	local tile_collection
+	if type(tile) == "string" then
+		tile_collection[1] = tile
+	else
+		tile_collection = table.copy(tile)
+	end
+
+	minetest.register_node(":pkarcs:"..nodename.."_arc", {
+		description = desc.." Arc",
+		paramtype = "light",
+		paramtype2 = "facedir",
+		tiles = tile_collection,
+		drawtype = "nodebox",
+		node_box = {
+			type = "fixed",
+			fixed = {
+				{ nb(0),  nb(0),  nb(0),     nb(1),  nb(16), nb(16) },
+				{ nb(1),  nb(4),  nb(0),     nb(2),  nb(16), nb(16) },
+				{ nb(2),  nb(7),  nb(0),     nb(3),  nb(16), nb(16) },
+				{ nb(3),  nb(8),  nb(0),     nb(4),  nb(16), nb(16) },
+				{ nb(4),  nb(10), nb(0),     nb(5),  nb(16), nb(16) },
+				{ nb(5),  nb(11), nb(0),     nb(6),  nb(16), nb(16) },
+				{ nb(6),  nb(12), nb(0),     nb(8),  nb(16), nb(16) },
+				{ nb(8),  nb(13), nb(0),     nb(9),  nb(16), nb(16) },
+				{ nb(9),  nb(14), nb(0),     nb(12), nb(16), nb(16) },
+				{ nb(12), nb(15), nb(0),     nb(16), nb(16), nb(16) },
+			}
+		},
+		groups = group,
+		sounds = sound,
+
+		on_place = function(itemstack, placer, pointed_thing)
+			if pointed_thing.type ~= "node" then
+				return itemstack
+			end
+
+			local p1 = pointed_thing.under
+			local p0 = pointed_thing.above
+			local param2 = 0
+
+			local placer_pos = placer:getpos()
+			if placer_pos then
+				local dir = {
+					x = p1.x - placer_pos.x,
+					y = p1.y - placer_pos.y,
+					z = p1.z - placer_pos.z
+				}
+				param2 = minetest.dir_to_facedir(dir)
+			end
+
+			if p0.y-1 == p1.y then
+				param2 = param2 + 20
+				if param2 == 21 then
+					param2 = 23
+				elseif param2 == 23 then
+					param2 = 21
+				end
+			end
+
+			local NROT = 4 -- Number of possible "rotations" (4 Up down left right)
+			local rot = param2 % NROT
+			local wall = math.floor(param2/NROT)
+			if rot >=3 then
+				rot = 0
+			else 
+				rot = rot +1
+			end
+			param2 = wall*NROT+rot
+
+			return minetest.item_place(itemstack, placer, pointed_thing, param2)
+		end,
+	})
+
+	minetest.register_craft({
+		output = "pkarcs:"..nodename.."_arc".." 5",
+		recipe = {
+			{ craftmaterial, craftmaterial, craftmaterial },
+			{ craftmaterial, "",            ""            },
+			{ craftmaterial, "",            ""            }
+		}
+	})
+
+	minetest.register_node(":pkarcs:"..nodename.."_outer_arc", {
+		description = desc.." Outer Arc",
+		paramtype = "light",
+		paramtype2 = "facedir",
+		tiles = tile_collection,
+		drawtype = "nodebox",
+		node_box = {
+			type = "fixed",
+			fixed = {
+				{ nb(0),  nb(0),  nb(16),     nb(1),  nb(16), nb(16-1)  },
+				{ nb(0),  nb(4),  nb(16),     nb(2),  nb(16), nb(16-2)  },
+				{ nb(0),  nb(7),  nb(16),     nb(3),  nb(16), nb(16-3)  },
+				{ nb(0),  nb(8),  nb(16),     nb(4),  nb(16), nb(16-4)  },
+				{ nb(0),  nb(10), nb(16),     nb(5),  nb(16), nb(16-5)  },
+				{ nb(0),  nb(11), nb(16),     nb(6),  nb(16), nb(16-6)  },
+				{ nb(0),  nb(12), nb(16),     nb(8),  nb(16), nb(16-8)  },
+				{ nb(0),  nb(13), nb(16),     nb(9),  nb(16), nb(16-9)  },
+				{ nb(0),  nb(14), nb(16),     nb(12), nb(16), nb(16-12) },
+				{ nb(0),  nb(15), nb(16),     nb(16), nb(16), nb(16-16) },
+			}
+		},
+		groups = group,
+		sounds = sound,
+
+		on_place = function(itemstack, placer, pointed_thing)
+			if pointed_thing.type ~= "node" then
+				return itemstack
+			end
+
+			local p1 = pointed_thing.under
+			local p0 = pointed_thing.above
+			local param2 = 0
+
+			local placer_pos = placer:getpos()
+			if placer_pos then
+				local dir = {
+					x = p1.x - placer_pos.x,
+					y = p1.y - placer_pos.y,
+					z = p1.z - placer_pos.z
+				}
+				param2 = minetest.dir_to_facedir(dir)
+			end
+
+			if p0.y-1 == p1.y then
+				param2 = param2 + 20
+				if param2 == 21 then
+					param2 = 23
+				elseif param2 == 23 then
+					param2 = 21
+				end
+			end
+
+			local NROT = 4 -- Number of possible "rotations" (4 Up down left right)
+			local rot = param2 % NROT
+			local wall = math.floor(param2/NROT)
+			if rot >=3 then
+				rot = 0
+			else 
+				rot = rot +1
+			end
+			param2 = wall*NROT+rot
+
+			return minetest.item_place(itemstack, placer, pointed_thing, param2)
+		end,
+
+	})
+
+	minetest.register_craft({
+		output = "pkarcs:"..nodename.."_outer_arc".." 5",
+		recipe = {
+			{ "default:torch", craftmaterial, craftmaterial },
+			{ craftmaterial,   "",            ""            },
+			{ craftmaterial,   "",            ""            }
+		}
+	})
+
+	minetest.register_node(":pkarcs:"..nodename.."_inner_arc", {
+		description = desc.." Inner Arc",
+		paramtype = "light",
+		paramtype2 = "facedir",
+		tiles = tile_collection,
+		drawtype = "nodebox",
+		node_box = {
+			type = "fixed",
+			fixed = {
+				{ nb(0),  nb(0),  nb(16),     nb(1),  nb(16), nb(0)    },
+				{ nb(0),  nb(0),  nb(16),     nb(16), nb(16), nb(16-1) },
+
+				{ nb(0),  nb(4),  nb(16),     nb(2),  nb(16), nb(0)    },
+				{ nb(0),  nb(4),  nb(16),     nb(16), nb(16), nb(16-2) },
+
+				{ nb(0),  nb(7),  nb(16),     nb(3),  nb(16), nb(0)    },
+				{ nb(0),  nb(7),  nb(16),     nb(16), nb(16), nb(16-3) },
+
+				{ nb(0),  nb(8),  nb(16),     nb(4),  nb(16), nb(0)    },
+				{ nb(0),  nb(8),  nb(16),     nb(16), nb(16), nb(16-4) },
+
+				{ nb(0),  nb(10), nb(16),     nb(5),  nb(16), nb(0)    },
+				{ nb(0),  nb(10), nb(16),     nb(16), nb(16), nb(16-5) },
+
+				{ nb(0),  nb(11), nb(16),     nb(6),  nb(16), nb(0)    },
+				{ nb(0),  nb(11), nb(16),     nb(16), nb(16), nb(16-6) },
+
+				{ nb(0),  nb(12), nb(16),     nb(8),  nb(16), nb(0)    },
+				{ nb(0),  nb(12), nb(16),     nb(16), nb(16), nb(16-8) },
+
+				{ nb(0),  nb(13), nb(16),     nb(9),  nb(16), nb(0)    },
+				{ nb(0),  nb(13), nb(16),     nb(16), nb(16), nb(16-9) },
+
+				{ nb(0),  nb(14), nb(16),     nb(12), nb(16), nb(0)     },
+				{ nb(0),  nb(14), nb(16),     nb(16), nb(16), nb(16-12) },
+
+				{ nb(0),  nb(15), nb(16),     nb(16), nb(16), nb(16-16) },
+			}
+		},
+		groups = group,
+		sounds = sound,
+
+		on_place = function(itemstack, placer, pointed_thing)
+			if pointed_thing.type ~= "node" then
+				return itemstack
+			end
+
+			local p1 = pointed_thing.under
+			local p0 = pointed_thing.above
+			local param2 = 0
+
+			local placer_pos = placer:getpos()
+			if placer_pos then
+				local dir = {
+					x = p1.x - placer_pos.x,
+					y = p1.y - placer_pos.y,
+					z = p1.z - placer_pos.z
+				}
+				param2 = minetest.dir_to_facedir(dir)
+			end
+
+			if p0.y-1 == p1.y then
+				param2 = param2 + 20
+				if param2 == 21 then
+					param2 = 23
+				elseif param2 == 23 then
+					param2 = 21
+				end
+			end
+
+			local NROT = 4 -- Number of possible "rotations" (4 Up down left right)
+			local rot = param2 % NROT
+			local wall = math.floor(param2/NROT)
+			if rot >=3 then
+				rot = 0
+			else 
+				rot = rot +1
+			end
+			param2 = wall*NROT+rot
+
+			return minetest.item_place(itemstack, placer, pointed_thing, param2)
+		end,
+
+	})
+
+	minetest.register_craft({
+		output = "pkarcs:"..nodename.."_inner_arc".." 5",
+		recipe = {
+			{ "",            craftmaterial,   craftmaterial },
+			{ craftmaterial, "default:torch", ""            },
+			{ craftmaterial, "",              ""            }
+		}
+	})
+
+end
+
+-- register nodes
+
+function pkarcs.register_node(name)
+	local node_def = minetest.registered_nodes[name]
+	if not node_def then
+		minetest.log("warning", "[pkarcs] Skipping unknown node: ".. name)
+		return
+	end
+	local node_name = name:split(':')[2]
+
+	if not node_def.tiles then
+		node_def.tiles = table.copy(node_def.tile_images)
+		node_def.tile_images = nil
+	end
+
+	pkarcs.register_all(node_name, node_def.description, node_def.tiles, node_def.sound, node_def.groups, name)
+end
+
+
+-- make arcs for all default stone and wood nodes
+
+pkarcs.register_node("default:cobble")
+pkarcs.register_node("default:mossycobble")
+pkarcs.register_node("default:desert_cobble")
+
+pkarcs.register_node("default:stone")
+pkarcs.register_node("default:stonebrick")
+pkarcs.register_node("default:stone_block")
+
+pkarcs.register_node("default:desert_stone")
+pkarcs.register_node("default:desert_stonebrick")
+pkarcs.register_node("default:desert_stone_block")
+
+pkarcs.register_node("default:desert_sandstone")
+pkarcs.register_node("default:desert_sandstone_block")
+pkarcs.register_node("default:desert_sandstone_brick")
+
+pkarcs.register_node("default:silver_sandstone")
+pkarcs.register_node("default:silver_sandstone_block")
+pkarcs.register_node("default:silver_sandstone_brick")
+
+pkarcs.register_node("default:sandstone")
+pkarcs.register_node("default:sandstonebrick")
+pkarcs.register_node("default:sandstone_block")
+
+pkarcs.register_node("default:brick")
+
+pkarcs.register_node("default:obsidian")
+pkarcs.register_node("default:obsidianbrick")
+pkarcs.register_node("default:obsidian_block")
+
+pkarcs.register_node("default:wood")
+pkarcs.register_node("default:junglewood")
+pkarcs.register_node("default:pine_wood")
+pkarcs.register_node("default:acacia_wood")
+pkarcs.register_node("default:aspen_wood")
+
diff --git a/license.txt b/license.txt
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index 0000000..826e134
--- /dev/null
+++ b/license.txt
@@ -0,0 +1,6 @@
+Simple Arcs for Minetest 0.4.16 (pkarcs)
+by PEAK
+
+License for the code: LGPLv2.1+
+
+06-05-2017
diff --git a/mod.conf b/mod.conf
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index 0000000..e3b7fd9
--- /dev/null
+++ b/mod.conf
@@ -0,0 +1 @@
+name = pkarcs
diff --git a/screenshots/crafting_arc.png b/screenshots/crafting_arc.png
new file mode 100644
index 0000000..b7e1ef7
--- /dev/null
+++ b/screenshots/crafting_arc.png
diff --git a/screenshots/crafting_inner_arc.png b/screenshots/crafting_inner_arc.png
new file mode 100644
index 0000000..9a58715
--- /dev/null
+++ b/screenshots/crafting_inner_arc.png
diff --git a/screenshots/crafting_outer_arc.png b/screenshots/crafting_outer_arc.png
new file mode 100644
index 0000000..b2e2795
--- /dev/null
+++ b/screenshots/crafting_outer_arc.png
diff --git a/screenshots/screenshot_1.png b/screenshots/screenshot_1.png
new file mode 100644
index 0000000..71015c4
--- /dev/null
+++ b/screenshots/screenshot_1.png
diff --git a/screenshots/screenshot_2.png b/screenshots/screenshot_2.png
new file mode 100644
index 0000000..02bde8a
--- /dev/null
+++ b/screenshots/screenshot_2.png