From 8e30bc8dbd41082df63699c8f786ebedc04b1e0c Mon Sep 17 00:00:00 2001 From: kay27 Date: Thu, 8 Apr 2021 02:54:33 +0400 Subject: [PATCH 1/2] [mcl_portals] Prevent from spawning Nether portals in Undertale when not enough air space in Nether --- mods/ITEMS/mcl_portals/portal_nether.lua | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/mods/ITEMS/mcl_portals/portal_nether.lua b/mods/ITEMS/mcl_portals/portal_nether.lua index 825c95e05..1d9fe2efb 100644 --- a/mods/ITEMS/mcl_portals/portal_nether.lua +++ b/mods/ITEMS/mcl_portals/portal_nether.lua @@ -490,10 +490,12 @@ local function ecb_scan_area_2(blockpos, action, calls_remaining, param) end if param.next_chunk_1 and param.next_chunk_2 and param.next_pos then - local pos1, pos2, pos = param.next_chunk_1, param.next_chunk_2, param.next_pos - log("action", "[mcl_portals] Making additional search in chunk below, because current one doesn't contain any air space for portal, target pos "..pos_to_string(pos)) - minetest.emerge_area(pos1, pos2, ecb_scan_area_2, {pos = pos, pos1 = pos1, pos2 = pos2, name=name, obj=obj}) - return + local pos1, pos2, p = param.next_chunk_1, param.next_chunk_2, param.next_pos + if p.x >= pos1.x and p.x <= pos2.x and p.y >= pos1.y and p.y <= pos2.y and p.z >= pos1.z and p.z <= pos2.z then + log("action", "[mcl_portals] Making additional search in chunk below, because current one doesn't contain any air space for portal, target pos "..pos_to_string(p)) + minetest.emerge_area(pos1, pos2, ecb_scan_area_2, {pos = p, pos1 = pos1, pos2 = pos2, name=name, obj=obj}) + return + end end log("action", "[mcl_portals] found no space, reverting to target pos "..pos_to_string(pos).." - creating a portal") @@ -536,7 +538,7 @@ local function create_portal(pos, limit1, limit2, name, obj) -- Basically the copy of code above, with minor additions to continue the search in single additional chunk below: local next_chunk_1 = {x = pos1.x, y = pos1.y - mcl_vars.chunk_size_in_nodes, z = pos1.z} local next_chunk_2 = add(next_chunk_1, mcl_vars.chunk_size_in_nodes - 1) - local next_pos = {x = pos.x, y=next_chunk_2.y, z = pos.z} + local next_pos = {x = pos.x, y=max(next_chunk_2.y, limit1.y), z = pos.z} if limit1 and limit1.x and limit1.y and limit1.z then pos1 = {x = max(min(limit1.x, pos.x), pos1.x), y = max(min(limit1.y, pos.y), pos1.y), z = max(min(limit1.z, pos.z), pos1.z)} next_chunk_1 = {x = max(min(limit1.x, next_pos.x), next_chunk_1.x), y = max(min(limit1.y, next_pos.y), next_chunk_1.y), z = max(min(limit1.z, next_pos.z), next_chunk_1.z)} From 2db0e176b315968363998f6c655920a174840a76 Mon Sep 17 00:00:00 2001 From: iliekprogrammar Date: Thu, 8 Apr 2021 12:04:29 +0800 Subject: [PATCH 2/2] Prevent param2 overflow when adding stems. Fix #1490 --- mods/ITEMS/mcl_ocean/kelp.lua | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-) diff --git a/mods/ITEMS/mcl_ocean/kelp.lua b/mods/ITEMS/mcl_ocean/kelp.lua index 3aefe85f8..bbdae64ee 100644 --- a/mods/ITEMS/mcl_ocean/kelp.lua +++ b/mods/ITEMS/mcl_ocean/kelp.lua @@ -1,6 +1,9 @@ -- TODO: whenever it becomes possible to fully implement kelp without the -- plantlike_rooted limitation, please update accordingly. -- +-- TODO: whenever it becomes possible to make kelp grow infinitely without +-- resorting to making intermediate kelp stem node, please update accordingly. +-- -- TODO: In MC, you can't actually destroy kelp by bucket'ing water in the middle. -- However, because of the plantlike_rooted hack, we'll just allow it for now. @@ -191,17 +194,18 @@ end -- Converts param2 to kelp height. +-- For the special case where the max param2 is reached, interpret that as the +-- 16th kelp stem. function kelp.get_height(param2) - return math_floor(param2 / 16) + return param2 ~= 255 and math_floor(param2 / 16) or 16 -- 256/16 end -- Obtain pos and node of the tip of kelp. -function kelp.get_tip(pos, param2) - -- Optional params: param2 - local height = kelp.get_height(param2 or mt_get_node(pos).param2) - local pos_tip = {x=pos.x, y=pos.y, z=pos.z} - pos_tip.y = pos_tip.y + height + 1 +function kelp.get_tip(pos, height) + -- Optional params: height + local height = height or kelp.get_height(mt_get_node(pos).param2) + local pos_tip = {x=pos.x, y=pos.y+height+1, z=pos.z} return pos_tip, mt_get_node(pos_tip), height end @@ -227,7 +231,8 @@ end -- Obtain next param2. function kelp.next_param2(param2) - return param2+16 - param2 % 16 + -- param2 max value is 255, so adding to 256 causes overflow. + return math_min(param2+16 - param2 % 16, 255); end @@ -526,7 +531,7 @@ function kelp.kelp_on_place(itemstack, placer, pointed_thing) -- When placed on kelp. if mt_get_item_group(nu_name, "kelp") == 1 then - pos_tip,node_tip = kelp.get_tip(pos_under, node_under.param2) + pos_tip,node_tip = kelp.get_tip(pos_under, kelp.get_height(node_under.param2)) def_tip = mt_registered_nodes[node_tip.name] -- When placed on surface.