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Make cannon 'fire' response optional, defaulting to off.

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This commit is contained in:
Dennis Jenkins 2021-03-08 07:25:34 -08:00 committed by Buckaroo Banzai
parent 8450e4ac70
commit e7f3f1eac6
2 changed files with 18 additions and 4 deletions
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11
digiline.lua
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@ -31,7 +31,7 @@ spacecannon.digiline_handler_get = function(pos, node, channel)
digilines.receptor_send(pos, spacecannon.digiline_rules, channel, resp) digilines.receptor_send(pos, spacecannon.digiline_rules, channel, resp)
end end
spacecannon.digiline_handler_fire = function(pos, node, channel) spacecannon.digiline_handler_fire = function(pos, node, channel, msg)
local meta = minetest.get_meta(pos) local meta = minetest.get_meta(pos)
-- TODO: Add ability to set "target node" in the msg, and if its within -- TODO: Add ability to set "target node" in the msg, and if its within
@ -60,7 +60,14 @@ spacecannon.digiline_handler_fire = function(pos, node, channel)
pos = pos pos = pos
} }
digilines.receptor_send(pos, spacecannon.digiline_rules, channel, resp) -- Only send response if the fire request specifically asked for it.
-- Consider a large (N) bank of cannons on the same digiline. Firing all N
-- at the same time would generate N responses, which would be seen by the LUAC
-- and the (N-1) other cannons, resulting in N^2 message processing. If N>20,
-- the LUAC will get fried.
if msg.verbose then
digilines.receptor_send(pos, spacecannon.digiline_rules, channel, resp)
end
end end
spacecannon.digiline_effector = function(pos, node, channel, msg) spacecannon.digiline_effector = function(pos, node, channel, msg)

11
readme.md
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@ -36,7 +36,7 @@ An "on" signal triggers a fire-action.
Fire a cannon: Fire a cannon:
```lua ```lua
if event.type == "program" then if event.type == "program" then
digiline_send("cannon", { command="fire" }) digiline_send("cannon", { command="fire", verbose=false })
end end
``` ```
@ -66,7 +66,14 @@ Example response from a "get" request:
} }
``` ```
Example response from a "fire" request: The "fire" request can specify an optional "verbose" flag. If this flag
evaluates to true, then the following example response will be sent back.
Note that if you have a large number of cannons that you will likely want
to disable responses. N cannons firing and generating responses will
cause N^2 messages to be processed, as each cannon receives the fire response
from all of its peers. If N>20, your LUAC will overheat. N>900, and your
server admin will want to have a chat with you.
```lua ```lua
{ {
type = "digiline", type = "digiline",