277 lines
8.4 KiB
Lua
277 lines
8.4 KiB
Lua
local S = minetest.get_translator("mcl_falling_nodes")
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local dmes = minetest.get_modpath("mcl_death_messages") ~= nil
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local get_falling_depth = function(self)
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if not self._startpos then
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-- Fallback
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self._startpos = self.object:get_pos()
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end
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return self._startpos.y - vector.round(self.object:get_pos()).y
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end
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local deal_falling_damage = function(self, dtime)
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if minetest.get_item_group(self.node.name, "falling_node_damage") == 0 then
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return
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end
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-- Cause damage to any player it hits.
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-- Algorithm based on MC anvils.
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-- TODO: Support smashing other objects, too.
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local pos = self.object:get_pos()
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if not self._startpos then
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-- Fallback
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self._startpos = pos
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end
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local objs = minetest.get_objects_inside_radius(pos, 1)
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for _,v in ipairs(objs) do
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local hp = v:get_hp()
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if v:is_player() and hp ~= 0 then
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if not self._hit_players then
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self._hit_players = {}
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end
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local name = v:get_player_name()
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local hit = false
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for _,v in ipairs(self._hit_players) do
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if name == v then
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hit = true
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end
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end
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if not hit then
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table.insert(self._hit_players, name)
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local way = self._startpos.y - pos.y
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local damage = (way - 1) * 2
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damage = math.min(40, math.max(0, damage))
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if damage >= 1 then
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hp = hp - damage
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if hp < 0 then
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hp = 0
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end
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if v:is_player() then
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-- TODO: Reduce damage if wearing a helmet
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local msg
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if minetest.get_item_group(self.node.name, "anvil") ~= 0 then
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msg = S("@1 was smashed by a falling anvil.", v:get_player_name())
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else
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msg = S("@1 was smashed by a falling block.", v:get_player_name())
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end
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if dmes then
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mcl_death_messages.player_damage(v, msg)
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end
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end
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v:set_hp(hp)
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end
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end
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end
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end
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end
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minetest.register_entity(":__builtin:falling_node", {
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initial_properties = {
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visual = "wielditem",
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visual_size = {x = 0.667, y = 0.667},
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textures = {},
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physical = true,
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is_visible = false,
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collide_with_objects = false,
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collisionbox = {-0.5, -0.5, -0.5, 0.5, 0.5, 0.5},
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},
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node = {},
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meta = {},
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set_node = function(self, node, meta)
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local def = core.registered_nodes[node.name]
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-- Change falling node if definition tells us to
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if def and def._mcl_falling_node_alternative then
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node.name = def._mcl_falling_node_alternative
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end
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local glow
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self.node = node
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self.meta = meta or {}
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-- Set correct entity yaw
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if def and node.param2 ~= 0 then
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if (def.paramtype2 == "facedir" or def.paramtype2 == "colorfacedir") then
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self.object:set_yaw(core.dir_to_yaw(core.facedir_to_dir(node.param2)))
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elseif (def.paramtype2 == "wallmounted" or def.paramtype2 == "colorwallmounted") then
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self.object:set_yaw(core.dir_to_yaw(core.wallmounted_to_dir(node.param2)))
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end
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if def.light_source then
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glow = def.light_source
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end
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end
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self.object:set_properties({
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is_visible = true,
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textures = {node.name},
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glow = glow,
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})
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end,
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get_staticdata = function(self)
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local meta = self.meta
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-- Workaround: Save inventory seperately from metadata.
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-- Because Minetest crashes when a node with inventory gets deactivated
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-- (GitHub issue #7020).
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-- FIXME: Remove the _inv workaround when it is no longer needed
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local inv
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if meta then
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inv = meta.inv
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meta.inventory = nil
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end
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local ds = {
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node = self.node,
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meta = self.meta,
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_inv = inv,
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_startpos = self._startpos,
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_hit_players = self._hit_players,
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}
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return minetest.serialize(ds)
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end,
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on_activate = function(self, staticdata)
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self.object:set_armor_groups({immortal = 1})
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local ds = minetest.deserialize(staticdata)
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if ds then
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self._startpos = ds._startpos
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self._hit_players = ds._hit_players
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if ds.node then
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local meta = ds.meta
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meta.inventory = ds._inv
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self:set_node(ds.node, meta)
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else
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self:set_node(ds)
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end
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elseif staticdata ~= "" then
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self:set_node({name = staticdata})
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end
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if not self._startpos then
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self._startpos = self.object:get_pos()
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end
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self._startpos = vector.round(self._startpos)
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end,
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on_step = function(self, dtime)
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-- Set gravity
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local acceleration = self.object:get_acceleration()
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if not vector.equals(acceleration, {x = 0, y = -10, z = 0}) then
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self.object:set_acceleration({x = 0, y = -10, z = 0})
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end
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-- Turn to actual node when colliding with ground, or continue to move
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local pos = self.object:get_pos()
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-- Portal check
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local np = {x = pos.x, y = pos.y + 0.3, z = pos.z}
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local n2 = minetest.get_node(np)
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if n2.name == "mcl_portals:portal_end" then
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-- TODO: Teleport falling node.
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self.object:remove()
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return
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end
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-- Position of bottom center point
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local bcp = {x = pos.x, y = pos.y - 0.7, z = pos.z}
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-- Avoid bugs caused by an unloaded node below
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local bcn = minetest.get_node_or_nil(bcp)
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local bcd = bcn and minetest.registered_nodes[bcn.name]
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-- TODO: At this point, we did 2 get_nodes in 1 tick.
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-- Figure out how to improve that (if it is a problem).
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if bcn and (not bcd or bcd.walkable or
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(minetest.get_item_group(self.node.name, "float") ~= 0 and
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bcd.liquidtype ~= "none")) then
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if bcd and bcd.leveled and
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bcn.name == self.node.name then
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local addlevel = self.node.level
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if not addlevel or addlevel <= 0 then
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addlevel = bcd.leveled
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end
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if minetest.add_node_level(bcp, addlevel) == 0 then
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if minetest.registered_nodes[self.node.name]._mcl_after_falling then
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minetest.registered_nodes[self.node.name]._mcl_after_falling(bcp, get_falling_depth(self))
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end
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deal_falling_damage(self, dtime)
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self.object:remove()
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return
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end
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elseif bcd and bcd.buildable_to and
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(minetest.get_item_group(self.node.name, "float") == 0 or
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bcd.liquidtype == "none") then
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minetest.remove_node(bcp)
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return
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end
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local nd = minetest.registered_nodes[n2.name]
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if n2.name == "mcl_portals:portal_end" then
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-- TODO: Teleport falling node.
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elseif (nd and nd.buildable_to == true) or minetest.get_item_group(self.node.name, "crush_after_fall") ~= 0 then
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-- Replace destination node if it's buildable to
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minetest.remove_node(np)
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-- Run script hook
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for _, callback in pairs(minetest.registered_on_dignodes) do
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callback(np, n2)
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end
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local def = minetest.registered_nodes[self.node.name]
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if def then
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minetest.add_node(np, self.node)
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if def._mcl_after_falling then
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def._mcl_after_falling(np, get_falling_depth(self))
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end
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if self.meta then
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local meta = minetest.get_meta(np)
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meta:from_table(self.meta)
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end
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if def.sounds and def.sounds.place and def.sounds.place.name then
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minetest.sound_play(def.sounds.place, {pos = np})
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end
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end
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else
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-- Drop the *falling node* as an item if the destination node is NOT buildable to
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local drops = minetest.get_node_drops(self.node.name, "")
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for _, dropped_item in pairs(drops) do
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minetest.add_item(np, dropped_item)
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end
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end
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deal_falling_damage(self, dtime)
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self.object:remove()
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minetest.check_for_falling(np)
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return
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end
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local vel = self.object:get_velocity()
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-- Fix position if entity does not move
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if vector.equals(vel, {x = 0, y = 0, z = 0}) then
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local npos = vector.round(self.object:get_pos())
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local npos2 = table.copy(npos)
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npos2.y = npos2.y - 2
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local lownode = minetest.get_node(npos2)
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-- Special check required for fences and walls, because of their overhigh collision box.
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if minetest.get_item_group(lownode.name, "fence") == 1 or minetest.get_item_group(lownode.name, "wall") == 1 then
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-- Instantly stop the node if it is above a fence/wall. This is needed
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-- because the falling node collides early with a fence/wall node.
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-- Hacky, because the falling node will teleport a short distance, instead
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-- of smoothly fall on the fence post.
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local npos3 = table.copy(npos)
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npos3.y = npos3.y - 1
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minetest.add_node(npos3, self.node)
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local def = minetest.registered_nodes[self.node.name]
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if def then
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if def._mcl_after_falling then
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def._mcl_after_falling(npos3, get_falling_depth(self))
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end
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if def.sounds and def.sounds.place and def.sounds.place.name then
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minetest.sound_play(def.sounds.place, {pos = np})
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end
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end
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deal_falling_damage(self, dtime)
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self.object:remove()
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minetest.check_for_falling(npos3)
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return
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else
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-- Normal position fix (expected case)
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self.object:set_pos(npos)
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end
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end
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deal_falling_damage(self, dtime)
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end
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})
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