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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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40
mods/default/functions.lua
View File

@ -481,3 +481,43 @@ minetest.register_abm({
end
end
})
--
-- Checks if specified volume intersects a protected volume
--
function default.intersects_protection(minp, maxp, player_name, interval)
-- 'interval' is the largest allowed interval for the 3D lattice of checks
-- Compute the optimal float step 'd' for each axis so that all corners and
-- borders are checked. 'd' will be smaller or equal to 'interval'.
-- Subtracting 1e-4 ensures that the max co-ordinate will be reached by the
-- for loop (which might otherwise not be the case due to rounding errors).
local d = {}
for _, c in pairs({"x", "y", "z"}) do
if maxp[c] > minp[c] then
d[c] = (maxp[c] - minp[c]) / math.ceil((maxp[c] - minp[c]) / interval) - 1e-4
elseif maxp[c] == minp[c] then
d[c] = 1 -- Any value larger than 0 to avoid division by zero
else -- maxp[c] < minp[c], print error and treat as protection intersected
minetest.log("error", "maxp < minp in 'default.intersects_protection()'")
return true
end
end
for zf = minp.z, maxp.z, d.z do
local z = math.floor(zf + 0.5)
for yf = minp.y, maxp.y, d.y do
local y = math.floor(yf + 0.5)
for xf = minp.x, maxp.x, d.x do
local x = math.floor(xf + 0.5)
if minetest.is_protected({x = x, y = y, z = z}, player_name) then
return true
end
end
end
end
return false
end

101
mods/default/nodes.lua
View File

@ -500,9 +500,6 @@ minetest.register_node("default:sapling", {
sunlight_propagates = true,
walkable = false,
on_timer = default.grow_sapling,
on_construct = function(pos)
minetest.get_node_timer(pos):start(math.random(2400,4800))
end,
selection_box = {
type = "fixed",
fixed = {-0.3, -0.5, -0.3, 0.3, 0.35, 0.3}
@ -510,6 +507,23 @@ minetest.register_node("default:sapling", {
groups = {snappy = 2, dig_immediate = 3, flammable = 2,
attached_node = 1, sapling = 1},
sounds = default.node_sound_leaves_defaults(),
on_construct = function(pos)
minetest.get_node_timer(pos):start(math.random(2400,4800))
end,
on_place = function(itemstack, placer, pointed_thing)
itemstack = default.sapling_on_place(itemstack, placer, pointed_thing,
"default:sapling",
-- minp, maxp to be checked, relative to sapling pos
-- minp_relative.y = 1 because sapling pos has been checked
{x = -2, y = 1, z = -2},
{x = 2, y = 6, z = 2},
-- maximum interval of interior volume check
4)
return itemstack
end,
})
minetest.register_node("default:leaves", {
@ -624,9 +638,6 @@ minetest.register_node("default:junglesapling", {
sunlight_propagates = true,
walkable = false,
on_timer = default.grow_sapling,
on_construct = function(pos)
minetest.get_node_timer(pos):start(math.random(2400,4800))
end,
selection_box = {
type = "fixed",
fixed = {-0.3, -0.5, -0.3, 0.3, 0.35, 0.3}
@ -634,6 +645,23 @@ minetest.register_node("default:junglesapling", {
groups = {snappy = 2, dig_immediate = 3, flammable = 2,
attached_node = 1, sapling = 1},
sounds = default.node_sound_leaves_defaults(),
on_construct = function(pos)
minetest.get_node_timer(pos):start(math.random(2400,4800))
end,
on_place = function(itemstack, placer, pointed_thing)
itemstack = default.sapling_on_place(itemstack, placer, pointed_thing,
"default:junglesapling",
-- minp, maxp to be checked, relative to sapling pos
-- minp_relative.y = 1 because sapling pos has been checked
{x = -2, y = 1, z = -2},
{x = 2, y = 15, z = 2},
-- maximum interval of interior volume check
4)
return itemstack
end,
})
@ -691,9 +719,6 @@ minetest.register_node("default:pine_sapling", {
sunlight_propagates = true,
walkable = false,
on_timer = default.grow_sapling,
on_construct = function(pos)
minetest.get_node_timer(pos):start(math.random(2400,4800))
end,
selection_box = {
type = "fixed",
fixed = {-0.3, -0.5, -0.3, 0.3, 0.35, 0.3}
@ -701,6 +726,23 @@ minetest.register_node("default:pine_sapling", {
groups = {snappy = 2, dig_immediate = 3, flammable = 2,
attached_node = 1, sapling = 1},
sounds = default.node_sound_leaves_defaults(),
on_construct = function(pos)
minetest.get_node_timer(pos):start(math.random(2400,4800))
end,
on_place = function(itemstack, placer, pointed_thing)
itemstack = default.sapling_on_place(itemstack, placer, pointed_thing,
"default:pine_sapling",
-- minp, maxp to be checked, relative to sapling pos
-- minp_relative.y = 1 because sapling pos has been checked
{x = -2, y = 1, z = -2},
{x = 2, y = 12, z = 2},
-- maximum interval of interior volume check
4)
return itemstack
end,
})
@ -758,9 +800,6 @@ minetest.register_node("default:acacia_sapling", {
sunlight_propagates = true,
walkable = false,
on_timer = default.grow_sapling,
on_construct = function(pos)
minetest.get_node_timer(pos):start(math.random(2400,4800))
end,
selection_box = {
type = "fixed",
fixed = {-0.3, -0.5, -0.3, 0.3, 0.35, 0.3}
@ -768,6 +807,23 @@ minetest.register_node("default:acacia_sapling", {
groups = {snappy = 2, dig_immediate = 3, flammable = 2,
attached_node = 1, sapling = 1},
sounds = default.node_sound_leaves_defaults(),
on_construct = function(pos)
minetest.get_node_timer(pos):start(math.random(2400,4800))
end,
on_place = function(itemstack, placer, pointed_thing)
itemstack = default.sapling_on_place(itemstack, placer, pointed_thing,
"default:acacia_sapling",
-- minp, maxp to be checked, relative to sapling pos
-- minp_relative.y = 1 because sapling pos has been checked
{x = -4, y = 1, z = -4},
{x = 4, y = 6, z = 4},
-- maximum interval of interior volume check
4)
return itemstack
end,
})
minetest.register_node("default:aspen_tree", {
@ -824,9 +880,6 @@ minetest.register_node("default:aspen_sapling", {
sunlight_propagates = true,
walkable = false,
on_timer = default.grow_sapling,
on_construct = function(pos)
minetest.get_node_timer(pos):start(math.random(2400,4800))
end,
selection_box = {
type = "fixed",
fixed = {-0.3, -0.5, -0.3, 0.3, 0.35, 0.3}
@ -834,7 +887,25 @@ minetest.register_node("default:aspen_sapling", {
groups = {snappy = 2, dig_immediate = 3, flammable = 2,
attached_node = 1, sapling = 1},
sounds = default.node_sound_leaves_defaults(),
on_construct = function(pos)
minetest.get_node_timer(pos):start(math.random(2400,4800))
end,
on_place = function(itemstack, placer, pointed_thing)
itemstack = default.sapling_on_place(itemstack, placer, pointed_thing,
"default:aspen_sapling",
-- minp, maxp to be checked, relative to sapling pos
-- minp_relative.y = 1 because sapling pos has been checked
{x = -2, y = 1, z = -2},
{x = 2, y = 12, z = 2},
-- maximum interval of interior volume check
4)
return itemstack
end,
})
--
-- Ores
--

46
mods/default/trees.lua
View File

@ -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