104 lines
4 KiB
Lua
104 lines
4 KiB
Lua
--[[
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Leads — Adds leads for transporting animals to Minetest.
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Copyright © 2023, Silver Sandstone <@SilverSandstone@craftodon.social>
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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]]
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--- Internal functions and overrides.
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-- @module internal
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leads.interaction_blockers = {};
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function leads._after_register_item(name, def)
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local old_on_place = def.on_place;
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local old_on_secondary_use = def.on_secondary_use;
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local overrides = {};
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function overrides.on_place(itemstack, placer, pointed_thing, ...)
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-- Try knotting the placer's held lead:
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if placer and not placer:get_player_control().sneak then
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local node = pointed_thing.under and minetest.get_node_or_nil(pointed_thing.under);
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if node and leads.is_knottable(node.name) then
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if leads.knot(placer, pointed_thing.under) then
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return nil;
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end;
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end;
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end;
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-- Fallback to the item's old on_place function:
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return (old_on_place or minetest.item_place)(itemstack, placer, pointed_thing, ...);
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end;
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function overrides.on_secondary_use(itemstack, user, pointed_thing, ...)
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local object = pointed_thing and pointed_thing.ref;
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local keys = user:get_player_control();
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-- If the player is holding a knotted lead, tie it to the object instead:
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if user and object and leads.is_leashable(object) and not leads.is_immobile(object) and not keys.sneak then
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for lead in leads.find_connected_leads(user, true, false) do
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local lead_entity = lead:get_luaentity();
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local follower = lead_entity:get_follower();
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if follower and leads.is_immobile(follower) then
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lead_entity:reverse(); -- Reverse the lead so the knot becomes the leader.
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if lead_entity:set_follower(object) then
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return nil;
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end;
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end;
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end;
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end;
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-- Hold Aux1 to leash an animal to another animal:
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if object and keys.aux1 and leads.is_leashable(object) then
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for lead in leads.find_connected_leads(user, true, false) do
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if lead:get_luaentity():set_leader(object) then
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return nil;
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end;
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end;
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end;
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return (old_on_secondary_use or minetest.item_secondary_use)(itemstack, user, pointed_thing, ...);
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end;
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minetest.override_item(name, overrides);
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end;
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local old_is_protected = minetest.is_protected;
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function minetest.is_protected(pos, name)
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if leads.interaction_blockers[name] then
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return true;
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end;
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return old_is_protected(pos, name);
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end;
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for name, def in pairs(minetest.registered_items) do
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leads._after_register_item(name, def);
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end;
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local old_register_item = minetest.register_item;
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function minetest.register_item(name, def)
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old_register_item(name, def);
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leads._after_register_item(string.gsub(name, '^:+', ''), def);
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end;
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