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Builtin/../falling: Fix bugs caused by 'ignore' nodes

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Original commit by t4im, rebased and developed by paramat.
Fix CONTENT_IGNORE being replaced by falling nodes or causing large
areas of sand to collapse into itself.
Format some conditional code for clarity.
Add and clarify some comments.
This commit is contained in:
paramat 2016-11-06 09:10:05 +00:00
parent e82bd3f067
commit 3c5da70d7c
1 changed files with 19 additions and 14 deletions
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33
builtin/game/falling.lua
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@ -46,15 +46,17 @@ core.register_entity(":__builtin:falling_node", {
if not vector.equals(acceleration, {x = 0, y = -10, z = 0}) then
self.object:setacceleration({x = 0, y = -10, z = 0})
end
-- Turn to actual sand when collides to ground or just move
-- Turn to actual node when colliding with ground, or continue to move
local pos = self.object:getpos()
local bcp = {x = pos.x, y = pos.y - 0.7, z = pos.z} -- Position of bottom center point
local bcn = core.get_node(bcp)
local bcd = core.registered_nodes[bcn.name]
-- Note: walkable is in the node definition, not in item groups
if not bcd or bcd.walkable or
-- Position of bottom center point
local bcp = {x = pos.x, y = pos.y - 0.7, z = pos.z}
-- Avoid bugs caused by an unloaded node below
local bcn = core.get_node_or_nil(bcp)
local bcd = bcn and core.registered_nodes[bcn.name]
if bcn and
(not bcd or bcd.walkable or
(core.get_item_group(self.node.name, "float") ~= 0 and
bcd.liquidtype ~= "none") then
bcd.liquidtype ~= "none")) then
if bcd and bcd.leveled and
bcn.name == self.node.name then
local addlevel = self.node.level
@ -154,16 +156,19 @@ function nodeupdate_single(p)
local n = core.get_node(p)
if core.get_item_group(n.name, "falling_node") ~= 0 then
local p_bottom = {x = p.x, y = p.y - 1, z = p.z}
local n_bottom = core.get_node(p_bottom)
local d_bottom = core.registered_nodes[n_bottom.name]
-- Note: walkable is in the node definition, not in item groups
-- Only spawn falling node if node below is loaded
local n_bottom = core.get_node_or_nil(p_bottom)
local d_bottom = n_bottom and core.registered_nodes[n_bottom.name]
if d_bottom and
(core.get_item_group(n.name, "float") == 0 or
d_bottom.liquidtype == "none") and
d_bottom.liquidtype == "none") and
(n.name ~= n_bottom.name or (d_bottom.leveled and
core.get_node_level(p_bottom) < core.get_node_max_level(p_bottom))) and
(not d_bottom.walkable or
d_bottom.buildable_to) then
core.get_node_level(p_bottom) <
core.get_node_max_level(p_bottom))) and
(not d_bottom.walkable or d_bottom.buildable_to) then
n.level = core.get_node_level(p)
core.remove_node(p)
spawn_falling_node(p, n)