Add scraping-off capability to axe

mods/rp_default/tools.lua

@@ -479,8 +479,32 @@ minetest.register_tool(
       groups = { shovel = 1 },
 })
 
+
 -- Axes
 
+-- Scrape off color of painted node
+local scrape = function(max_uses)
+    return function(itemstack, placer, pointed_thing)
+        -- Handle pointed node handlers and protection
+        local handled, handled_itemstack = util.on_place_pointed_node_handler(itemstack, placer, pointed_thing)
+        if handled then
+           return handled_itemstack
+        end
+        if util.handle_node_protection(placer, pointed_thing) then
+           return itemstack
+        end
+
+        -- Scrape off color
+        local pos = pointed_thing.under
+        if rp_paint.scrape_color(pos) then
+           if not minetest.is_creative_enabled(placer:get_player_name()) then
+               itemstack:add_wear_by_uses(max_uses)
+           end
+        end
+        return itemstack
+    end
+end
+
 minetest.register_tool(
    "rp_default:axe_wood",
    {
@@ -497,6 +521,7 @@ minetest.register_tool(
       },
       sound = sound_tool,
       groups = { axe = 1 },
+      on_place = scrape(10),
 })
 
 minetest.register_tool(
@@ -515,6 +540,7 @@ minetest.register_tool(
       },
       sound = sound_tool,
       groups = { axe = 1 },
+      on_place = scrape(60),
 })
 
 minetest.register_tool(
@@ -533,6 +559,7 @@ minetest.register_tool(
       },
       sound = sound_tool,
       groups = { axe = 1 },
+      on_place = scrape(135),
 })
 
 minetest.register_tool(
@@ -551,6 +578,7 @@ minetest.register_tool(
       },
       sound = sound_tool,
       groups = { axe = 1 },
+      on_place = scrape(270),
 })
 
 minetest.register_tool(
@@ -569,6 +597,7 @@ minetest.register_tool(
       },
       sound = sound_tool,
       groups = { axe = 1 },
+      on_place = scrape(360),
 })
 
 minetest.register_tool(
@@ -587,6 +616,7 @@ minetest.register_tool(
       },
       sound = sound_tool,
       groups = { axe = 1 },
+      on_place = scrape(420),
 })
 
 -- Spears

mods/rp_paint/API.md

@@ -85,7 +85,7 @@ about to be set for this node.
 This function must return a boolean value: `true` if painting is allowed
 or `false` to disallow/deny the painting.
 
-## Setting and getting color
+## Functions
 
 The color of nodes can be set and gotten programmatically by using
 a color ID (see below).
@@ -104,6 +104,22 @@ on failure.
 Note that for nodes with `paramtype2="colorfacedir"`, an approximate
 color might be chosen.
 
+### `rp_paint.remove_color(pos)`
+
+Removes color of a paintable node at `pos`, returning it to its
+“neutral”/unpainted state.
+Returns `true` on success, `false` on failure or if node was not painted
+or if node does not support an unpainted state.
+
+### `rp_paint.scrape_color(pos)`
+
+Same as `rp_paint.remove_color`, but will also play a “scraping-off”
+sound effect (`_rp_scrape`).
+
+Recommended to be used by tools.
+
+Other effects may be added in future versions of this mod.
+
 ### Color IDs
 
 Each color has an unique numeric ID. The following IDs are available:

mods/rp_paint/init.lua

@@ -144,6 +144,45 @@ rp_paint.set_color = function(pos, color)
 	return false
 end
 
+rp_paint.remove_color = function(pos)
+	local node = minetest.get_node(pos)
+	local paintable = minetest.get_item_group(node.name, "paintable")
+	if paintable == 1 and string.sub(node.name, -8, -1) == "_painted" then
+		local newname = string.sub(node.name, 1, -9)
+		local newdef = minetest.registered_nodes[newname]
+		local olddef = minetest.registered_nodes[node.name]
+		if olddef and newdef then
+			local param2 = 0
+			if olddef.paramtype2 == "color4dir" then
+				param2 = node.param2 % 4
+			elseif olddef.paramtype2 == "colorwallmounted" then
+				param2 = node.param2 % 8
+			elseif olddef.paramtype2 == "colorfacedir" then
+				param2 = node.param2 % 32
+			end
+			minetest.swap_node(pos, {name=newname, param2=param2})
+			return true
+		end
+	end
+	return false
+end
+
+rp_paint.scrape_color = function(pos)
+	local scraped  = rp_paint.remove_color(pos)
+	if scraped then
+		local node = minetest.get_node(pos)
+		local def = minetest.registered_nodes[node.name]
+		if not def then
+			return false
+		end
+		if def.sounds and def.sounds._rp_scrape then
+			minetest.sound_play(def.sounds._rp_scrape, {pos=pos, max_hear_distance=8}, true)
+		end
+		return true
+	end
+	return false
+end
+
 minetest.register_tool("rp_paint:brush", {
 	description = S("Paint Brush"),
 	_tt_help = S("Changes color of paintable blocks").."\n"..S("Punch paint bucket to change brush color"),

mods/rp_sounds/API.md

@@ -58,6 +58,13 @@ These are the available functions:
 * `rp_sounds.node_sound_water_defaults(table)`: Water
 * `rp_sounds.node_sound_snow_defaults(table)`: Snow (incomplete, not recommended)
 
+#### Custom sound events
+
+Apart from the builtin sound events like `footstep`, `dig`, `dug`, etc. this mod supports
+custom sound events as well:
+
+* `_rp_scrape`: When something is scraped off the block (like removing paint)
+
 ### Helper functions
 
 #### `rp_sounds.play_place_failed_sound(player)`

mods/rp_sounds/README.txt

@@ -159,6 +159,8 @@ List of sounds and credits:
 * rp_sounds_fall_gravel.*.ogg
 * rp_sounds_fall_grass.*.ogg
 * rp_sounds_fall_plant.*.ogg
+* rp_sounds_scrape_wood.*.ogg
+* rp_sounds_scrape_glass.*.ogg
 * default_water_footstep.*.ogg
 	* by Wuzzy
 	* License: CC0

mods/rp_sounds/init.lua

@@ -18,6 +18,8 @@ function rp_sounds.node_sound_defaults(table)
       {name="default_place_node_hard", gain=0.8}
    table.place_failed = table.place_failed or
       {name="rp_sounds_place_failed", gain=PLACE_FAILED_GAIN}
+   table._rp_scrape = table._rp_scrape or
+      {name="rp_sounds_scrape_wood", gain=0.3}
    return table
 end
 
@@ -143,6 +145,8 @@ function rp_sounds.node_sound_wood_defaults(table)
       {name="rp_sounds_dig_wood", gain=0.5}
    table.dug = table.dug or
       {name="rp_sounds_dug_wood", gain=1.0}
+   table._rp_scrape = table._rp_scrape or
+      {name="rp_sounds_scrape_wood", gain=0.3}
    rp_sounds.node_sound_defaults(table)
    return table
 end
@@ -157,6 +161,8 @@ function rp_sounds.node_sound_planks_defaults(table)
       {name="rp_sounds_dug_planks", gain=0.7}
    table.place = table.place or
       {name="rp_sounds_place_planks", gain=1.0}
+   table._rp_scrape = table._rp_scrape or
+      {name="rp_sounds_scrape_wood", gain=0.3}
    rp_sounds.node_sound_defaults(table)
    return table
 end
@@ -231,6 +237,8 @@ function rp_sounds.node_sound_glass_defaults(table)
       {name="rp_sounds_dug_glass", gain=1.0}
    table.place = table.place or
       {name="rp_sounds_place_glass", gain=1.0}
+   table._rp_scrape = table._rp_scrape or
+      {name="rp_sounds_scrape_glass", gain=0.4}
    rp_sounds.node_sound_defaults(table)
    return table
 end