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-- Minetest: builtin/item.lua
--
-- Falling stuff
--
minetest.register_entity("__builtin:falling_node", {
initial_properties = {
physical = true,
collisionbox = {-0.5,-0.5,-0.5, 0.5,0.5,0.5},
visual = "wielditem",
textures = {},
visual_size = {x=0.667, y=0.667},
},
nodename = "",
set_node = function(self, nodename)
self.nodename = nodename
local stack = ItemStack(nodename)
local itemtable = stack:to_table()
local itemname = nil
if itemtable then
itemname = stack:to_table().name
end
local item_texture = nil
local item_type = ""
if minetest.registered_items[itemname] then
item_texture = minetest.registered_items[itemname].inventory_image
item_type = minetest.registered_items[itemname].type
end
prop = {
is_visible = true,
textures = {nodename},
}
self.object:set_properties(prop)
end,
get_staticdata = function(self)
return self.nodename
end,
on_activate = function(self, staticdata)
self.nodename = staticdata
self.object:set_armor_groups({immortal=1})
--self.object:setacceleration({x=0, y=-10, z=0})
self:set_node(self.nodename)
end,
on_step = function(self, dtime)
-- Set gravity
self.object:setacceleration({x=0, y=-10, z=0})
-- Turn to actual sand when collides to ground or just 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 = minetest.env:get_node(bcp)
-- Note: walkable is in the node definition, not in item groups
if minetest.registered_nodes[bcn.name] and
minetest.registered_nodes[bcn.name].walkable then
local np = {x=bcp.x, y=bcp.y+1, z=bcp.z}
-- Check what's here
local n2 = minetest.env:get_node(np)
-- If it's not air or liquid, remove node and replace it with
-- it's drops
if n2.name ~= "air" and (not minetest.registered_nodes[n2.name] or
minetest.registered_nodes[n2.name].liquidtype == "none") then
local drops = minetest.get_node_drops(n2.name, "")
minetest.env:remove_node(np)
-- Add dropped items
local _, dropped_item
for _, dropped_item in ipairs(drops) do
minetest.env:add_item(np, dropped_item)
end
-- Run script hook
local _, callback
for _, callback in ipairs(minetest.registered_on_dignodes) do
callback(np, n2, nil)
end
end
-- Create node and remove entity
minetest.env:add_node(np, {name=self.nodename})
self.object:remove()
else
-- Do nothing
end
end
})
function spawn_falling_node(p, nodename)
obj = minetest.env:add_entity(p, "__builtin:falling_node")
obj:get_luaentity():set_node(nodename)
end
--
-- Some common functions
--
function nodeupdate_single(p)
n = minetest.env:get_node(p)
if minetest.get_node_group(n.name, "falling_node") ~= 0 then
p_bottom = {x=p.x, y=p.y-1, z=p.z}
n_bottom = minetest.env:get_node(p_bottom)
-- Note: walkable is in the node definition, not in item groups
if minetest.registered_nodes[n_bottom.name] and
not minetest.registered_nodes[n_bottom.name].walkable then
minetest.env:remove_node(p)
spawn_falling_node(p, n.name)
nodeupdate(p)
end
end
end
function nodeupdate(p)
-- Round p to prevent falling entities to get stuck
p.x = math.floor(p.x+0.5)
p.y = math.floor(p.y+0.5)
p.z = math.floor(p.z+0.5)
for x = -1,1 do
for y = -1,1 do
for z = -1,1 do
p2 = {x=p.x+x, y=p.y+y, z=p.z+z}
nodeupdate_single(p2)
end
end
end
end
--
-- Global callbacks
--
function on_placenode(p, node)
nodeupdate(p)
end
minetest.register_on_placenode(on_placenode)
function on_dignode(p, node)
nodeupdate(p)
end
minetest.register_on_dignode(on_dignode)
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