added paint roller based on Krocks mod

init.lua

@@ -23,6 +23,7 @@
 -- Version 0.5
 
 -- Changelog: 
+-- 17.09.14 Added a modified version of Krocks paintroller from his paint_roller mod.
 -- 03.09.14 Added a second block type menu.
 --          Updated dependency list.
 --          Added support for homedecor kitchen chairs, beds and bathroom tiles. Changed sorting order of blocks.
@@ -1150,6 +1151,7 @@ end
 colormachine.get_node_name_painted = function( old_node_name, dye_node_name )
 	local possible_blocks = {};
 	local unpainted_block = "";
+	local old_dye         = "";
 	for k,v in pairs( colormachine.data ) do
 		if( old_node_name == v.block and colormachine.data[ k ].installed==1) then
 			table.insert( possible_blocks, k );
@@ -1167,6 +1169,18 @@ colormachine.get_node_name_painted = function( old_node_name, dye_node_name )
 			return;
 		end
 		unpainted_block = colormachine.data[ found_color_data_block.blocktype ].block;
+		old_dye         = found_color_data_block.found_name;
+
+		-- figure out how the dye this block was painted with was called
+		local cdata = colormachine.decode_color_name( nil, old_dye );
+		if( cdata ) then
+			old_dye = colormachine.translate_color_name( nil, 'unifieddyes_', old_dye, cdata.c, cdata.s, cdata.g, 1 );
+			if( not( old_dye ) or old_dye == '' ) then
+				old_dye = colormachine.translate_color_name( nil, 'dye_', old_dye, cdata.c, cdata.s, cdata.g, 1 );
+			end
+		else
+			old_dye = '';
+		end
 	end
 	if( unpainted_block ~= "" and #possible_blocks < 1 ) then
 		for k,v in pairs( colormachine.data ) do
@@ -1178,7 +1192,7 @@ colormachine.get_node_name_painted = function( old_node_name, dye_node_name )
 
 	-- remove paint
 	if( not( dye_node_name ) or dye_node_name == "") then
-		return {unpainted_block};
+		return {possible={unpainted_block},old_dye = old_dye};
 	end
 
 	-- decode dye name
@@ -1208,7 +1222,7 @@ colormachine.get_node_name_painted = function( old_node_name, dye_node_name )
 	if( #found < 1 ) then
 		return;
 	end
-	return found;
+	return { possible=found, old_dye = old_dye };
 end
 
 
@@ -1885,3 +1899,5 @@ minetest.register_craft({
                 { 'default:steel_ingot', 'default:steel_ingot', 'default:steel_ingot' }
         }
 })
+
+dofile( minetest.get_modpath('colormachine')..'/paint_roller.lua');

paint_roller.lua

@@ -0,0 +1,62 @@
+-- This is based upon the paint_roller mod by Krock.
+
+minetest.register_tool("colormachine:paint_roller", {
+	description = "Paint roller",
+	inventory_image = "paint_roller.png",
+	on_use = function(itemstack, placer, pointed_thing)
+		if pointed_thing.type ~= "node" then
+			return
+		end
+		local idx = placer:get_wield_index() + 1
+		if idx > 7 then	--copied from explorer tools moo-ha-ha
+			return
+		end
+		if minetest.is_protected(pointed_thing.under, placer:get_player_name()) then
+			minetest.record_protection_violation(pointed_thing.under, placer:get_player_name())
+			return
+		end
+		local node      = minetest.get_node(pointed_thing.under);
+		local node_name = node.name
+
+		local inv = placer:get_inventory()
+		local stack = inv:get_stack("main", idx) --dye
+		local stack_name = stack:get_name()
+
+		local res           = colormachine.get_node_name_painted( node_name, stack_name );
+
+		if( not( res) or not( res.possible  ) or #res.possible < 1 or (#res.possible==1 and res.possible[1]==node_name)) then
+			return;
+		end
+		local index = 1;
+		for i,v in ipairs( res.possible ) do
+			if( v==node_name and i < #res.possible and #res.possible[i+1]) then
+				index = i+1;
+			end
+		end
+
+		-- return the old dye
+		if( res.old_dye and res.old_dye ~= stack_name ) then
+			inv:add_item( 'main', res.old_dye..' 1' );
+		end
+
+		-- consume one dye
+		if( stack_name and stack_name ~= '' and (not(res.old_dye) or res.old_dye~=stack_name)) then
+			inv:remove_item( 'main', stack_name..' 1');
+		end
+
+		-- paint the node
+		minetest.set_node(pointed_thing.under, {name=res.possible[ index ], param2=node.param2})
+
+		--itemstack:add_wear( 65535 / 30 );
+		return itemstack
+	end
+})
+
+minetest.register_craft({
+	output = "colormachine:paint_roller",
+	recipe = {
+		{"wool:white",	"wool:white",	"default:steel_ingot"},
+		{"",	"default:steel_ingot",	""},
+		{"",	"default:steel_ingot",	""},
+	}
+})