Move painting function from myfences and add an API

README.md

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+# mypaint
+
+Use paint cans and brushes to paint items.
+
+Licence - WTFPL

depends.txt

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+default

description.txt

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+Provides paint brushes and buckets for other mods to use to paint their items.

init.lua

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+mypaint = {}
+mypaint.colors = {
+	red = {"Red", "ff0000"},
+	green = {"Green", "00ff00"},
+	white = {"White", "ffffff"},
+}
+mypaint.paintables = {}
+
+mypaint.register = function(names, colors)
+	local ctable = {}
+	for _, color in ipairs(colors) do
+		ctable[color] = true
+	end
+	for _, name in ipairs(names) do
+		mypaint.paintables[name] = ctable
+	end
+end
+
+dofile(minetest.get_modpath("mypaint").."/paint.lua")

mod.conf

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+name = mypaint

models/mypaint_can.obj

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+# Blender v2.77 (sub 0) OBJ File: ''
+# www.blender.org
+o Cylinder
+v -0.000000 -0.500000 0.250000
+v -0.000000 0.000000 0.250000
+v -0.125000 -0.500000 0.216506
+v -0.125000 0.000000 0.216506
+v -0.216506 -0.500000 0.125000
+v -0.216506 0.000000 0.125000
+v -0.250000 -0.500000 0.000000
+v -0.250000 0.000000 0.000000
+v -0.216506 -0.500000 -0.125000
+v -0.216506 0.000000 -0.125000
+v -0.125000 -0.500000 -0.216506
+v -0.125000 0.000000 -0.216506
+v -0.000000 -0.500000 -0.250000
+v -0.000000 0.000000 -0.250000
+v 0.125000 -0.500000 -0.216506
+v 0.125000 0.000000 -0.216506
+v 0.216506 -0.500000 -0.125000
+v 0.216506 0.000000 -0.125000
+v 0.250000 -0.500000 -0.000000
+v 0.250000 0.000000 -0.000000
+v 0.216506 -0.500000 0.125000
+v 0.216506 0.000000 0.125000
+v 0.125000 -0.500000 0.216506
+v 0.125000 0.000000 0.216506
+vt 0.999881 0.000119
+vt 0.999881 0.322018
+vt 0.916568 0.322018
+vt 0.916567 0.000119
+vt 0.833254 0.322018
+vt 0.833254 0.000119
+vt 0.749941 0.322018
+vt 0.749940 0.000119
+vt 0.666627 0.322018
+vt 0.666627 0.000119
+vt 0.583314 0.322018
+vt 0.583313 0.000119
+vt 0.500000 0.322018
+vt 0.500000 0.000119
+vt 0.416687 0.322018
+vt 0.416686 0.000119
+vt 0.333373 0.322018
+vt 0.333373 0.000119
+vt 0.250060 0.322018
+vt 0.250060 0.000119
+vt 0.166746 0.322018
+vt 0.166746 0.000119
+vt 0.114068 0.633186
+vt 0.041916 0.591529
+vt 0.000260 0.519378
+vt 0.000260 0.436064
+vt 0.041916 0.363912
+vt 0.114068 0.322256
+vt 0.197381 0.322256
+vt 0.269533 0.363912
+vt 0.311190 0.436064
+vt 0.311190 0.519377
+vt 0.269533 0.591529
+vt 0.197381 0.633186
+vt 0.083433 0.322018
+vt 0.083433 0.000119
+vt 0.000119 0.322018
+vt 0.000119 0.000119
+vt 0.197241 0.322256
+vt 0.269392 0.363913
+vt 0.311049 0.436064
+vt 0.311049 0.519378
+vt 0.269392 0.591529
+vt 0.197241 0.633186
+vt 0.113927 0.633186
+vt 0.041776 0.591529
+vt 0.000119 0.519377
+vt 0.000119 0.436064
+vt 0.041776 0.363912
+vt 0.113927 0.322256
+vn -0.258800 0.000000 0.965900
+vn -0.707100 0.000000 0.707100
+vn -0.965900 0.000000 0.258800
+vn -0.965900 0.000000 -0.258800
+vn -0.707100 0.000000 -0.707100
+vn -0.258800 0.000000 -0.965900
+vn 0.258800 0.000000 -0.965900
+vn 0.707100 0.000000 -0.707100
+vn 0.965900 0.000000 -0.258800
+vn 0.965900 0.000000 0.258800
+vn 0.000000 1.000000 0.000000
+vn 0.707100 0.000000 0.707100
+vn 0.258800 0.000000 0.965900
+vn 0.000000 -1.000000 0.000000
+s off
+f 1/1/1 2/2/1 4/3/1 3/4/1
+f 3/4/2 4/3/2 6/5/2 5/6/2
+f 5/6/3 6/5/3 8/7/3 7/8/3
+f 7/8/4 8/7/4 10/9/4 9/10/4
+f 9/10/5 10/9/5 12/11/5 11/12/5
+f 11/12/6 12/11/6 14/13/6 13/14/6
+f 13/14/7 14/13/7 16/15/7 15/16/7
+f 15/16/8 16/15/8 18/17/8 17/18/8
+f 17/18/9 18/17/9 20/19/9 19/20/9
+f 19/20/10 20/19/10 22/21/10 21/22/10
+f 4/23/11 2/24/11 24/25/11 22/26/11 20/27/11 18/28/11 16/29/11 14/30/11 12/31/11 10/32/11 8/33/11 6/34/11
+f 21/22/12 22/21/12 24/35/12 23/36/12
+f 23/36/13 24/35/13 2/37/13 1/38/13
+f 1/39/14 3/40/14 5/41/14 7/42/14 9/43/14 11/44/14 13/45/14 15/46/14 17/47/14 19/48/14 21/49/14 23/50/14

paint.lua

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+local BRUSH_USES = 3
+local CAN_USES = 100
+
+function check_paintcan(pos, node)
+	local name = node.name
+	if string.sub(name, 1, 14) ~= "mypaint:paint_" then
+		return
+	end
+	local color = string.sub(name, 15)
+	local meta = minetest.get_meta(pos)
+	local uses = meta:get_int("mypaint:uses") - 1
+	meta:set_int("mypaint:uses", uses)
+	if uses <= 0 then
+		minetest.dig_node(pos)
+	else
+		local info = meta:get_string("infotext")
+		info = string.gsub(info, "%(.*%)", "("..uses.." uses)")
+		meta:set_string("infotext", info)
+	end
+	return ItemStack("mypaint:brush_"..color)
+end
+
+function paint_node(pos, node, col, itemstack)
+	local s, e
+	local nname = node.name
+	minetest.log("error", "checking node "..nname)
+	s, e = string.find(nname, "_[^_]+$")
+	if s and e then
+		local color = string.sub(nname, s + 1, e)
+		minetest.log("error", "found color "..color)
+		if mypaint.colors[color] then
+			nname = string.sub(nname, 1, s - 1)
+			minetest.log("error", "color ok, base name is "..nname)
+			if color == col then
+				return
+			end
+		end
+	end
+
+	for name, colors in pairs(mypaint.paintables) do
+		if (nname == name) then
+			if colors[col] then
+				minetest.set_node(pos,{name = name.."_"..col, param2 = node.param2})
+				if not minetest.setting_getbool("creative_mode") then
+					local wear = itemstack:get_wear() + 65535 / BRUSH_USES
+					if wear < 65535 then
+						itemstack:set_wear(wear)
+					else
+						itemstack = ItemStack("mypaint:brush")
+					end
+				end
+			end
+			return itemstack
+		end
+	end
+end
+
+minetest.register_tool("mypaint:brush", {
+	description = "Paint Brush",
+	inventory_image = "mypaint_brush.png",
+	on_use = function(itemstack, user, pointed_thing)
+		if pointed_thing.type ~= "node" then
+			return
+		end
+		local pos = pointed_thing.under
+		local node = minetest.get_node(pos)
+		if string.sub(node.name, 1, 8) ~= "mypaint:" then
+			return
+		end
+		return check_paintcan(pos, node)
+	end
+})
+
+for color, entry in pairs(mypaint.colors) do
+	local desc = entry[1]
+	local cstring = entry[2]
+
+	minetest.register_tool("mypaint:brush_"..color, {
+		description = "Paint Brush ("..desc.." Paint)",
+		inventory_image = "mypaint_brush.png^(mypaint_brush_color.png^[colorize:#"..cstring..")",
+		on_use = function(itemstack, user, pointed_thing)
+			if pointed_thing.type ~= "node" then
+				return
+			end
+			local pos = pointed_thing.under
+			local node = minetest.get_node(pos)
+			local ret = check_paintcan(pos, node)
+			if ret then
+				return ret
+			end
+			return paint_node(pos, node, color, itemstack)
+		end,
+	})
+
+	minetest.register_node("mypaint:paint_"..color, {
+		description = desc.." Paint",
+		drawtype = "mesh",
+		paramtype = "light",
+		paramtype2 = "facedir",
+		mesh = "mypaint_can.obj",
+		tiles = {"(mypaint_can_color.png^[colorize:#"..cstring..")^mypaint_can_base.png"},
+		stack_max = 1,
+		drop = "",
+		groups = {oddly_breakable_by_hand = 3, dig_immediate = 3, not_in_creative_inventory = 1},
+		selection_box = {
+			type = "fixed",
+			fixed = {
+				{-0.25, -0.5, -0.25, 0.25, 0., 0.25}, 
+			}
+		},
+		after_dig_node = function(pos, oldnode, oldmetadata, digger)
+			if not digger then
+				return
+			end
+			local inv = digger:get_inventory()
+			if not inv then
+				return
+			end
+			local itemstack = ItemStack("mypaint:paintcan_"..color)
+			local uses = tonumber(oldmetadata.fields["mypaint:uses"])
+			if not uses then
+				uses = 100
+			end
+			if uses <= 0 then
+				return
+			end
+			itemstack:set_wear((CAN_USES - uses) * (65535 / CAN_USES))
+			if inv:room_for_item("main", itemstack) then
+				inv:add_item("main", itemstack)
+			else
+				minetest.add_item(pos, itemstack)
+			end
+		end
+	})
+
+	minetest.register_tool("mypaint:paintcan_"..color, {
+		description = desc.." Paint",
+		inventory_image = "mypaint_inv_can_base.png^(mypaint_inv_can_color.png^[colorize:#"..cstring.."^[mask:mypaint_inv_can_color.png)",
+		on_place = function(itemstack, user, pointed_thing)
+			local pname = "mypaint:paint_"..color
+			local paint = ItemStack(pname)
+			paint = minetest.item_place_node(paint, user, pointed_thing)
+			if not paint or (paint:get_count() > 0) then
+				return
+			end
+			local pos = pointed_thing.under
+			local node = minetest.get_node(pos)
+			local meta = minetest.get_meta(pos)
+			if node.name ~= pname or (meta:get_int("mypaint:uses") > 0) then
+				pos = pointed_thing.above
+				node = minetest.get_node(pos)
+				meta = minetest.get_meta(pos)
+				if node.name ~= pname or (meta:get_int("mypaint:uses") > 0) then
+					return
+				end
+			end
+			local uses = math.floor(CAN_USES - itemstack:get_wear() / (65535 / CAN_USES))
+			meta:set_int("mypaint:uses", uses)
+			meta:set_string("infotext", desc.." Paint ("..uses.." uses)")
+			itemstack:take_item()
+			return itemstack
+		end
+	})
+
+	minetest.register_craft({
+		output = "mypaint:paintcan_"..color,
+		recipe = {
+			{"bucket:bucket_water","dye:"..color}
+		},
+		replacements = {{"bucket:bucket_water","bucket:bucket_empty"}},
+	})
+end
+
+minetest.register_craft({
+		output = 'mypaint:brush',
+		recipe = {
+			{'wool:white'},
+			{'group:stick'},
+		}
+})
+