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Respect protected areas when spawning remote portals (#27)

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* respect protected areas when spawning remote portals

* Use portal_shape to determine area to check for natural/protected

* Log warning on deprecated function call
This commit is contained in:
Treer
2020-07-26 14:34:06 +10:00
committed by GitHub
parent 8769593d6f
commit 5b3b56ebec
7 changed files with 140 additions and 53 deletions
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24
mapgen_nobiomes.lua
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@ -201,24 +201,30 @@ end)
-- use knowledge of the nether mapgen algorithm to return a suitable ground level for placing a portal.
function nether.find_nether_ground_y(target_x, target_z, start_y)
-- player_name is optional, allowing a player to spawn a remote portal in their own protected areas.
function nether.find_nether_ground_y(target_x, target_z, start_y, player_name)
local nobj_cave_point = minetest.get_perlin(np_cave)
local air = 0 -- Consecutive air nodes found
for y = start_y, start_y - 4096, -1 do
local minp_schem, maxp_schem = nether.get_schematic_volume({x = target_x, y = 0, z = target_z}, nil, "nether_portal")
local minp = {x = minp_schem.x, y = 0, z = minp_schem.z}
local maxp = {x = maxp_schem.x, y = 0, z = maxp_schem.z}
for y = start_y, math.max(NETHER_FLOOR + BLEND, start_y - 4096), -1 do
local nval_cave = nobj_cave_point:get3d({x = target_x, y = y, z = target_z})
if nval_cave > TCAVE then -- Cavern
air = air + 1
else -- Not cavern, check if 4 nodes of space above
if air >= 4 then
local portal_y = y + 1
-- Check volume for non-natural nodes
local minp = {x = target_x - 1, y = y , z = target_z - 2}
local maxp = {x = target_x + 2, y = y + 4, z = target_z + 2}
if nether.volume_is_natural(minp, maxp) then
return y + 1
minp.y = minp_schem.y + portal_y
maxp.y = maxp_schem.y + portal_y
if nether.volume_is_natural_and_unprotected(minp, maxp, player_name) then
return portal_y
else -- Restart search a little lower
nether.find_nether_ground_y(target_x, target_z, y - 16)
nether.find_nether_ground_y(target_x, target_z, y - 16, player_name)
end
else -- Not enough space, reset air to zero
air = 0
@ -226,5 +232,5 @@ function nether.find_nether_ground_y(target_x, target_z, start_y)
end
end
return start_y -- Fallback
end
return math.max(start_y, NETHER_FLOOR + BLEND) -- Fallback
end