new ko stone, and proper board area search for removing smoke fx and ko stones

rules.lua

@@ -182,6 +182,40 @@ local function connected_search(pos, final_result, early_termination_filter)
     return final_result
 end
 
+local function board_clear_fx(basepos)
+    local group = {basepos}
+    local checked = {[minetest.hash_node_position(basepos)] = basepos}
+
+    local probe = 0
+    while probe < #group do
+        probe = probe + 1
+        local pos = group[probe]
+
+        for i,v in pairs(neighbor_dirs(pos)) do
+            local newpos = pos + directions[v]
+
+            if (math.abs(newpos.x - basepos.x) <= 18) and (math.abs(newpos.z - basepos.z) <= 18) then
+                local newhash = minetest.hash_node_position(newpos)
+
+                local groups = minetest.registered_nodes[minetest.get_node(newpos).name].groups
+                if groups then
+                    if groups.ko_stone then
+                        nodecore.set_loud(newpos, {name = "air"})
+                    elseif groups.go_stone then
+                        smokecontrol(newpos)
+                    end
+                end
+
+                if (not checked[newhash]) then
+                    group[#group+1] = newpos
+                    checked[newhash] = true
+                end
+            end
+        end
+    end
+
+end
+
 local function _check_captures_filter(node, count)
     if (count > global_search_maximum) or (node:sub(1, 1) == "E") then
         return {capture = false}
@@ -336,13 +370,7 @@ function lc_liberties.handle_placement(pos)
         end
     end
 
-    for x=pos.x-18, pos.x+18 do
-        for z=pos.z-18, pos.z+18 do
-            if (x ~= pos.x) or (z ~= pos.z) then
-                smokecontrol({x = x, y = pos.y, z = z})
-            end
-        end
-    end
+    board_clear_fx(pos)
 
     smokecontrol(pos, 300, 2+#allcaptured)
 
@@ -424,3 +452,13 @@ function lc_liberties.handle_dig(pos, node, digger)
         return minetest.node_dig(pos, node, digger)
     end
 end
+
+function lc_liberties.handle_click_ko(pos, node, clicker, itemstack, pointed_thing)
+    local handnode = minetest.registered_nodes[itemstack:get_name()]
+    if handnode and handnode.groups.go_stone and
+            handnode.go_team ~= minetest.registered_nodes[node.name].go_team then
+        nodecore.set_loud(pos, {name = handnode.name})
+        itemstack:set_count(itemstack:get_count() - 1)
+    end
+    return itemstack
+end

stones.lua

@@ -31,17 +31,16 @@ local function reg(name, basename, basedef)
     if minetest.registered_nodes[piecename] then return end
     local desc = basedef.description or name
 
-    local nodeDesc
+    local nodedesc_base
 
     local nameStone = string.match(desc, "(.*)stone$")
     if nameStone then
-        nodeDesc = nameStone .. " "
+        nodedesc_base = nameStone .. " "
     elseif desc == "Stone" then
-        nodeDesc = ""
+        nodedesc_base = ""
     else
-        nodeDesc = desc .. " "
+        nodedesc_base = desc .. " "
     end
-    nodeDesc = nodeDesc .. "Go Stone"
 
     local stone_selection_box = {
         type = "fixed",
@@ -49,7 +48,7 @@ local function reg(name, basename, basedef)
     }
 
     minetest.register_node(":" .. piecename, {
-        description = nodeDesc,
+        description = nodedesc_base .. "Go Stone",
         drawtype = "mesh",
         mesh = "go_stone.obj",
 
@@ -88,8 +87,7 @@ local function reg(name, basename, basedef)
         fixed = {-5/16, -8/16, -5/16, 5/16, -2/16, 5/16}
     }
 
-    local territory_name = modname .. ":territory_" .. string_lower(name)
-    minetest.register_node(":" .. territory_name, {
+    minetest.register_node(":" .. modname .. ":territory_" .. string_lower(name), {
         description = "Stop Stone",
         drawtype = "nodebox",
 
@@ -130,6 +128,52 @@ local function reg(name, basename, basedef)
         on_dig = lc_liberties.handle_dig,
     })
 
+    local ko_selection_box = {
+        type = "fixed",
+        fixed = {-8/16, -8/16, -8/16, 8/16, -4/16, 8/16}
+    }
+
+    minetest.register_node(":" .. modname .. ":ko_" .. string_lower(name), {
+        description = nodedesc_base .. "Ko Stone",
+        drawtype = "nodebox",
+
+        node_box = {
+            type = "fixed",
+            fixed = {
+                {-7/16, -7/16, -7/16, 7/16, -5/16, -5/16},
+                {7/16, -7/16, -7/16, 5/16, -5/16, 7/16},
+                {7/16, -7/16, 7/16, -7/16, -5/16, 5/16},
+                {-7/16, -7/16, 7/16, -5/16, -5/16, -7/16},
+            }
+        },
+
+        selection_box = ko_selection_box,
+        collision_box = ko_selection_box,
+
+        tiles = {basedef.tiles[1]},
+
+        paramtype = "light",
+        sunlight_propagates = true,
+
+        groups = {
+            snappy = 1,
+            falling_node = 1,
+            stack_as_node = 1,
+            ko_stone = 1,
+            cheat = 1,
+        },
+
+        drop = "",
+        destroy_on_dig = true,
+        silktouch = false,
+
+        go_team = name,
+
+        sounds = basedef.sounds,
+
+        on_rightclick = lc_liberties.handle_click_ko,
+    })
+
     reg_stone_craft(name, "crossy")
     reg_stone_craft(name, "starcrossy")