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Hyrbid immediate/delayed witnessing

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If we have line of sight to see the event happen
now, then discover it immediately, otherwise save
it for delayed witnessing on punch.
This commit is contained in:
Aaron Suen 2020-09-26 20:17:31 -04:00
parent 64e917fc95
commit fb6a4d7dd1
1 changed files with 70 additions and 24 deletions
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94
mods/nc_api_hints/witness.lua
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@ -1,12 +1,32 @@
-- LUALOCALS < ---------------------------------------------------------
local minetest, nodecore, pairs, table, type, vector
= minetest, nodecore, pairs, table, type, vector
local table_remove
= table.remove
local math, minetest, nodecore, pairs, table, type, vector
= math, minetest, nodecore, pairs, table, type, vector
local math_pi, table_remove
= math.pi, table.remove
-- LUALOCALS > ---------------------------------------------------------
local modname = minetest.get_current_modname()
local seethru = {}
minetest.after(0, function()
for name, def in pairs(minetest.registered_nodes) do
if (minetest.get_item_group(name, "witness_opaque") == 0)
and (
minetest.get_item_group(name, "witness_transparent") > 0
or def.sunlight_propagates
or (
def.paramtype == "light"
and def.alpha
and def.alpha > 0
and def.alpha < 255
)
) then
seethru[name] = true
end
end
end)
local metakey = modname .. "_witness"
local cache = {}
local function witnessdata(player)
@ -22,31 +42,59 @@ local function witnessdata(player)
return data, function() return meta:set_string(metakey, minetest.serialize(data)) end
end
local function canwitnessnow(player, pos)
local ppos = player:get_pos()
ppos.y = ppos.y + player:get_properties().eye_height
local look = player:get_look_dir()
local targ = vector.normalize(vector.subtract(pos, ppos))
if vector.angle(look, targ) > math_pi / 8 then return end
local rp = vector.round(pos)
for pt in minetest.raycast(pos, ppos, false, true) do
if not pt.under then return end
if vector.equals(pt.under, rp) then return true end
local node = minetest.get_node(pt.under)
if not seethru[node.name] then return end
end
return true
end
local function witnesslater(player, pos, disc)
local data, save = witnessdata(player)
local newdata = {
node = minetest.get_node(pos).name,
stack = nodecore.stack_get(pos):get_name(),
disc = disc
}
local posstr = minetest.pos_to_string(pos)
local olddata = data.lookup[posstr]
if olddata and (olddata.node == newdata.node) and (olddata.stack
== newdata.stack) then
for k in pairs(disc) do olddata.disc[k] = true end
else
data.queue[#data.queue + 1] = pos
while #data.queue > 100 do table_remove(data.queue, 1) end
data.lookup[posstr] = newdata
end
save()
end
function nodecore.witness(pos, label, maxdist)
maxdist = maxdist or 16
label = type(label) == "table" and label or {label}
local disc = {}
for i = 1, #label do disc["witness:" .. label[i]] = true end
for _, player in pairs(minetest.get_connected_players()) do
local ppos = player:get_pos()
if vector.distance(ppos, pos) <= maxdist then
local data, save = witnessdata(player)
local newdata = {
node = minetest.get_node(pos).name,
stack = nodecore.stack_get(pos):get_name(),
label = label
}
local posstr = minetest.pos_to_string(pos)
local olddata = data.lookup[posstr]
if olddata and (olddata.node == newdata.node) and (olddata.stack
== newdata.stack) then
for i = 1, #label do
olddata.label[#olddata.label + 1] = label[i]
end
if canwitnessnow(player, pos) then
nodecore.player_discover(player, disc)
else
data.queue[#data.queue + 1] = pos
while #data.queue > 100 do table_remove(data.queue, 1) end
data.lookup[posstr] = newdata
witnesslater(player, pos, disc)
end
save()
end
end
end
@ -61,7 +109,5 @@ minetest.register_on_punchnode(function(pos, node, puncher)
node = node or minetest.get_node(pos)
if (found.node ~= node.name) or (nodecore.stack_get(pos):get_name()
~= found.stack) then return end
local disc = found.label
for i = 1, #found.label do disc["witness:" .. found.label[i]] = true end
return nodecore.player_discover(puncher, disc)
return nodecore.player_discover(puncher, found.disc)
end)