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Default: Prevent placing sapling if grown tree intersects protection

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Add a global 'intersects protection' function to functions.lua for
checking if a specified volume intersects with a protected volume.
A 3D lattice of points are checked with an adjustable interval.
Add a global 'sapling on place' function to avoid duplicated code in
nodes.lua.
This commit is contained in:
paramat
2016-07-19 01:01:59 +01:00
parent 2df7ce20dd
commit 0ac096991c
3 changed files with 172 additions and 15 deletions
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46
mods/default/trees.lua
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@ -418,6 +418,7 @@ function default.grow_new_acacia_tree(pos)
path, "random", nil, false)
end
-- New aspen tree
function default.grow_new_aspen_tree(pos)
@ -426,3 +427,48 @@ function default.grow_new_aspen_tree(pos)
minetest.place_schematic({x = pos.x - 2, y = pos.y - 1, z = pos.z - 2},
path, "0", nil, false)
end
--
-- Sapling 'on place' function to check protection of node and resulting tree volume
--
function default.sapling_on_place(itemstack, placer, pointed_thing,
sapling_name, minp_relative, maxp_relative, interval)
-- Position of sapling
local pos = pointed_thing.under
local node = minetest.get_node(pos)
local pdef = minetest.registered_nodes[node.name]
if not pdef or not pdef.buildable_to then
pos = pointed_thing.above
node = minetest.get_node(pos)
pdef = minetest.registered_nodes[node.name]
if not pdef or not pdef.buildable_to then
return itemstack
end
end
local player_name = placer:get_player_name()
-- Check sapling position for protection
if minetest.is_protected(pos, player_name) then
minetest.record_protection_violation(pos, player_name)
return itemstack
end
-- Check tree volume for protection
if not default.intersects_protection(
vector.add(pos, minp_relative),
vector.add(pos, maxp_relative),
player_name,
interval) then
minetest.set_node(pos, {name = sapling_name})
if not minetest.setting_getbool("creative_mode") then
itemstack:take_item()
end
else
minetest.record_protection_violation(pos, player_name)
-- Print extra information to explain
minetest.chat_send_player(player_name, "Tree will intersect protection")
end
return itemstack
end