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Smoke particles on blocked pipe pistons - #1381

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@RasmusKDRasmusKD commented Aug 16, 2026

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A blocked pipe system is invisible from the outside: pulses arrive, nothing moves, and finding the stuck piston means watching every piston at the exact moment a pulse happens.

A pull that is refused everywhere now marks the piston blocked, and a repeating task (every 12 ticks) keeps it visibly smoking. The next pull that delivers anything clears the flag, and the flag is also dropped when the piston or its source container is removed. The pulse-time puff is throttled per piston so fast clocks read as a steady chimney rather than a particle storm.

Gated by 'full-pipe-smoke' (default on). Same pull-loop area as #1376/#1378/#1380, happy to rebase whichever lands last.

@RasmusKD
Smoke on sticky pistons whose pull cannot be delivered anywhere
5350cf1
A blocked pipe system is invisible from the outside: pulses arrive,
nothing moves, and finding the stuck piston means watching every one of
them at the moment a pulse happens. A pull that is refused everywhere
now marks the piston blocked and a repeating task keeps it smoking, so
a stuck system can be found by looking at it. The next pull that
delivers clears the flag, and the flag is dropped when the piston or
its source container is removed. Gated by 'full-pipe-smoke' (default
on).
@me4502

me4502 commented Aug 19, 2026

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How does this interact with the round robin PR? My assumption is that doing this round-robin would alleviate "stuck" pipes for the most part – so what "defines" stuck in those cases?

@RasmusKD

RasmusKD commented Aug 19, 2026

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They compose pretty well. Blocked here means a pull happened and every item came back, and any delivering pull clears it. With round robin an unroutable stack only causes one refused pulse per rotation, so at most you get a short puff before the next delivery clears it. Steady smoke only happens when nothing in the container can go anywhere, outputs full or everything filtered out, which is exactly the case round robin can't help with.

If both land I can gate the persistent smoke on a full unproductive rotation instead of a single refused pull, so the one-slot case doesn't puff at all.

@RasmusKD
Clear the blocked flag when the source runs empty
7ca6c3b
Emptying the container by hand left the piston smoking forever, since
the flag only cleared on a delivering pull. A pulse that finds nothing
to pull now clears it too, a pipe with nothing to move is not stuck.
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Smoke particles on blocked pipe pistons by RasmusKD · Pull Request #1381 · EngineHub/CraftBook · GitHub
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Smoke particles on blocked pipe pistons - #1381
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Aug 16, 2026

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A blocked pipe system is invisible from the outside: pulses arrive, nothing moves, and finding the stuck piston means watching every piston at the exact moment a pulse happens.
A pull that is refused everywhere now marks the piston blocked, and a repeating task (every 12 ticks) keeps it visibly smoking. The next pull that delivers anything clears the flag, and the flag is also dropped when the piston or its source container is removed. The pulse-time puff is throttled per piston so fast clocks read as a steady chimney rather than a particle storm.
Gated by 'full-pipe-smoke' (default on). Same pull-loop area as #1376/#1378/#1380, happy to rebase whichever lands last.
@RasmusKD
Smoke on sticky pistons whose pull cannot be delivered anywhere
5350cf1
A blocked pipe system is invisible from the outside: pulses arrive,
nothing moves, and finding the stuck piston means watching every one of
them at the moment a pulse happens. A pull that is refused everywhere
now marks the piston blocked and a repeating task keeps it smoking, so
a stuck system can be found by looking at it. The next pull that
delivers clears the flag, and the flag is dropped when the piston or
its source container is removed. Gated by 'full-pipe-smoke' (default
on).
@me4502
me4502
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Aug 19, 2026

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How does this interact with the round robin PR? My assumption is that doing this round-robin would alleviate "stuck" pipes for the most part – so what "defines" stuck in those cases?
@RasmusKD
RasmusKD
commented
Aug 19, 2026

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ContributorAuthor
They compose pretty well. Blocked here means a pull happened and every item came back, and any delivering pull clears it. With round robin an unroutable stack only causes one refused pulse per rotation, so at most you get a short puff before the next delivery clears it. Steady smoke only happens when nothing in the container can go anywhere, outputs full or everything filtered out, which is exactly the case round robin can't help with.
If both land I can gate the persistent smoke on a full unproductive rotation instead of a single refused pull, so the one-slot case doesn't puff at all.
@RasmusKD
Clear the blocked flag when the source runs empty
7ca6c3b
Emptying the container by hand left the piston smoking forever, since
the flag only cleared on a delivering pull. A pulse that finds nothing
to pull now clears it too, a pipe with nothing to move is not stuck.
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Smoke particles on blocked pipe pistons by RasmusKD · Pull Request #1381 · EngineHub/CraftBook · GitHub
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Smoke particles on blocked pipe pistons - #1381
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A blocked pipe system is invisible from the outside: pulses arrive, nothing moves, and finding the stuck piston means watching every piston at the exact moment a pulse happens.
A pull that is refused everywhere now marks the piston blocked, and a repeating task (every 12 ticks) keeps it visibly smoking. The next pull that delivers anything clears the flag, and the flag is also dropped when the piston or its source container is removed. The pulse-time puff is throttled per piston so fast clocks read as a steady chimney rather than a particle storm.
Gated by 'full-pipe-smoke' (default on). Same pull-loop area as #1376/#1378/#1380, happy to rebase whichever lands last.
@RasmusKD
Smoke on sticky pistons whose pull cannot be delivered anywhere
5350cf1
A blocked pipe system is invisible from the outside: pulses arrive,
nothing moves, and finding the stuck piston means watching every one of
them at the moment a pulse happens. A pull that is refused everywhere
now marks the piston blocked and a repeating task keeps it smoking, so
a stuck system can be found by looking at it. The next pull that
delivers clears the flag, and the flag is dropped when the piston or
its source container is removed. Gated by 'full-pipe-smoke' (default
on).
@me4502
me4502
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Aug 19, 2026

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How does this interact with the round robin PR? My assumption is that doing this round-robin would alleviate "stuck" pipes for the most part – so what "defines" stuck in those cases?
@RasmusKD
RasmusKD
commented
Aug 19, 2026

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ContributorAuthor
They compose pretty well. Blocked here means a pull happened and every item came back, and any delivering pull clears it. With round robin an unroutable stack only causes one refused pulse per rotation, so at most you get a short puff before the next delivery clears it. Steady smoke only happens when nothing in the container can go anywhere, outputs full or everything filtered out, which is exactly the case round robin can't help with.
If both land I can gate the persistent smoke on a full unproductive rotation instead of a single refused pull, so the one-slot case doesn't puff at all.
@RasmusKD
Clear the blocked flag when the source runs empty
7ca6c3b
Emptying the container by hand left the piston smoking forever, since
the flag only cleared on a delivering pull. A pulse that finds nothing
to pull now clears it too, a pipe with nothing to move is not stuck.
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Smoke particles on blocked pipe pistons by RasmusKD · Pull Request #1381 · EngineHub/CraftBook · GitHub
Skip to content
Smoke particles on blocked pipe pistons - #1381
Open
RasmusKD wants to merge 2 commits into
EngineHub:masterfrom 
RasmusKD:pipe-blocked-smoke
Open
Smoke particles on blocked pipe pistons#1381
RasmusKD wants to merge 2 commits into
EngineHub:masterfrom 
RasmusKD:pipe-blocked-smoke
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@RasmusKD
@RasmusKDRasmusKD
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Aug 16, 2026

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A blocked pipe system is invisible from the outside: pulses arrive, nothing moves, and finding the stuck piston means watching every piston at the exact moment a pulse happens.
A pull that is refused everywhere now marks the piston blocked, and a repeating task (every 12 ticks) keeps it visibly smoking. The next pull that delivers anything clears the flag, and the flag is also dropped when the piston or its source container is removed. The pulse-time puff is throttled per piston so fast clocks read as a steady chimney rather than a particle storm.
Gated by 'full-pipe-smoke' (default on). Same pull-loop area as #1376/#1378/#1380, happy to rebase whichever lands last.
@RasmusKD
Smoke on sticky pistons whose pull cannot be delivered anywhere
5350cf1
A blocked pipe system is invisible from the outside: pulses arrive,
nothing moves, and finding the stuck piston means watching every one of
them at the moment a pulse happens. A pull that is refused everywhere
now marks the piston blocked and a repeating task keeps it smoking, so
a stuck system can be found by looking at it. The next pull that
delivers clears the flag, and the flag is dropped when the piston or
its source container is removed. Gated by 'full-pipe-smoke' (default
on).
@me4502
me4502
commented
Aug 19, 2026

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Member
How does this interact with the round robin PR? My assumption is that doing this round-robin would alleviate "stuck" pipes for the most part – so what "defines" stuck in those cases?
@RasmusKD
RasmusKD
commented
Aug 19, 2026

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ContributorAuthor
They compose pretty well. Blocked here means a pull happened and every item came back, and any delivering pull clears it. With round robin an unroutable stack only causes one refused pulse per rotation, so at most you get a short puff before the next delivery clears it. Steady smoke only happens when nothing in the container can go anywhere, outputs full or everything filtered out, which is exactly the case round robin can't help with.
If both land I can gate the persistent smoke on a full unproductive rotation instead of a single refused pull, so the one-slot case doesn't puff at all.
@RasmusKD
Clear the blocked flag when the source runs empty
7ca6c3b
Emptying the container by hand left the piston smoking forever, since
the flag only cleared on a delivering pull. A pulse that finds nothing
to pull now clears it too, a pipe with nothing to move is not stuck.
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Smoke particles on blocked pipe pistons by RasmusKD · Pull Request #1381 · EngineHub/CraftBook · GitHub
Skip to content
Smoke particles on blocked pipe pistons - #1381
Open
RasmusKD wants to merge 2 commits into
EngineHub:masterfrom 
RasmusKD:pipe-blocked-smoke
Open
Smoke particles on blocked pipe pistons#1381
RasmusKD wants to merge 2 commits into
EngineHub:masterfrom 
RasmusKD:pipe-blocked-smoke
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@RasmusKD
@RasmusKDRasmusKD
commented
Aug 16, 2026

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A blocked pipe system is invisible from the outside: pulses arrive, nothing moves, and finding the stuck piston means watching every piston at the exact moment a pulse happens.
A pull that is refused everywhere now marks the piston blocked, and a repeating task (every 12 ticks) keeps it visibly smoking. The next pull that delivers anything clears the flag, and the flag is also dropped when the piston or its source container is removed. The pulse-time puff is throttled per piston so fast clocks read as a steady chimney rather than a particle storm.
Gated by 'full-pipe-smoke' (default on). Same pull-loop area as #1376/#1378/#1380, happy to rebase whichever lands last.
@RasmusKD
Smoke on sticky pistons whose pull cannot be delivered anywhere
5350cf1
A blocked pipe system is invisible from the outside: pulses arrive,
nothing moves, and finding the stuck piston means watching every one of
them at the moment a pulse happens. A pull that is refused everywhere
now marks the piston blocked and a repeating task keeps it smoking, so
a stuck system can be found by looking at it. The next pull that
delivers clears the flag, and the flag is dropped when the piston or
its source container is removed. Gated by 'full-pipe-smoke' (default
on).
@me4502
me4502
commented
Aug 19, 2026

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Member
How does this interact with the round robin PR? My assumption is that doing this round-robin would alleviate "stuck" pipes for the most part – so what "defines" stuck in those cases?
@RasmusKD
RasmusKD
commented
Aug 19, 2026

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ContributorAuthor
They compose pretty well. Blocked here means a pull happened and every item came back, and any delivering pull clears it. With round robin an unroutable stack only causes one refused pulse per rotation, so at most you get a short puff before the next delivery clears it. Steady smoke only happens when nothing in the container can go anywhere, outputs full or everything filtered out, which is exactly the case round robin can't help with.
If both land I can gate the persistent smoke on a full unproductive rotation instead of a single refused pull, so the one-slot case doesn't puff at all.
@RasmusKD
Clear the blocked flag when the source runs empty
7ca6c3b
Emptying the container by hand left the piston smoking forever, since
the flag only cleared on a delivering pull. A pulse that finds nothing
to pull now clears it too, a pipe with nothing to move is not stuck.
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Smoke particles on blocked pipe pistons by RasmusKD · Pull Request #1381 · EngineHub/CraftBook · GitHub
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Smoke particles on blocked pipe pistons - #1381
Open
RasmusKD wants to merge 2 commits into
EngineHub:masterfrom 
RasmusKD:pipe-blocked-smoke
Open
Smoke particles on blocked pipe pistons#1381
RasmusKD wants to merge 2 commits into
EngineHub:masterfrom 
RasmusKD:pipe-blocked-smoke
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@RasmusKD
@RasmusKDRasmusKD
commented
Aug 16, 2026

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A blocked pipe system is invisible from the outside: pulses arrive, nothing moves, and finding the stuck piston means watching every piston at the exact moment a pulse happens.
A pull that is refused everywhere now marks the piston blocked, and a repeating task (every 12 ticks) keeps it visibly smoking. The next pull that delivers anything clears the flag, and the flag is also dropped when the piston or its source container is removed. The pulse-time puff is throttled per piston so fast clocks read as a steady chimney rather than a particle storm.
Gated by 'full-pipe-smoke' (default on). Same pull-loop area as #1376/#1378/#1380, happy to rebase whichever lands last.
@RasmusKD
Smoke on sticky pistons whose pull cannot be delivered anywhere
5350cf1
A blocked pipe system is invisible from the outside: pulses arrive,
nothing moves, and finding the stuck piston means watching every one of
them at the moment a pulse happens. A pull that is refused everywhere
now marks the piston blocked and a repeating task keeps it smoking, so
a stuck system can be found by looking at it. The next pull that
delivers clears the flag, and the flag is dropped when the piston or
its source container is removed. Gated by 'full-pipe-smoke' (default
on).
@me4502
me4502
commented
Aug 19, 2026

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Member
How does this interact with the round robin PR? My assumption is that doing this round-robin would alleviate "stuck" pipes for the most part – so what "defines" stuck in those cases?
@RasmusKD
RasmusKD
commented
Aug 19, 2026

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Copy Markdown

ContributorAuthor
They compose pretty well. Blocked here means a pull happened and every item came back, and any delivering pull clears it. With round robin an unroutable stack only causes one refused pulse per rotation, so at most you get a short puff before the next delivery clears it. Steady smoke only happens when nothing in the container can go anywhere, outputs full or everything filtered out, which is exactly the case round robin can't help with.
If both land I can gate the persistent smoke on a full unproductive rotation instead of a single refused pull, so the one-slot case doesn't puff at all.
@RasmusKD
Clear the blocked flag when the source runs empty
7ca6c3b
Emptying the container by hand left the piston smoking forever, since
the flag only cleared on a delivering pull. A pulse that finds nothing
to pull now clears it too, a pipe with nothing to move is not stuck.
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Smoke particles on blocked pipe pistons by RasmusKD · Pull Request #1381 · EngineHub/CraftBook · GitHub
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Smoke particles on blocked pipe pistons - #1381
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RasmusKD:pipe-blocked-smoke
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Smoke particles on blocked pipe pistons#1381
RasmusKD wants to merge 2 commits into
EngineHub:masterfrom 
RasmusKD:pipe-blocked-smoke
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@RasmusKD
@RasmusKDRasmusKD
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Aug 16, 2026

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A blocked pipe system is invisible from the outside: pulses arrive, nothing moves, and finding the stuck piston means watching every piston at the exact moment a pulse happens.
A pull that is refused everywhere now marks the piston blocked, and a repeating task (every 12 ticks) keeps it visibly smoking. The next pull that delivers anything clears the flag, and the flag is also dropped when the piston or its source container is removed. The pulse-time puff is throttled per piston so fast clocks read as a steady chimney rather than a particle storm.
Gated by 'full-pipe-smoke' (default on). Same pull-loop area as #1376/#1378/#1380, happy to rebase whichever lands last.
@RasmusKD
Smoke on sticky pistons whose pull cannot be delivered anywhere
5350cf1
A blocked pipe system is invisible from the outside: pulses arrive,
nothing moves, and finding the stuck piston means watching every one of
them at the moment a pulse happens. A pull that is refused everywhere
now marks the piston blocked and a repeating task keeps it smoking, so
a stuck system can be found by looking at it. The next pull that
delivers clears the flag, and the flag is dropped when the piston or
its source container is removed. Gated by 'full-pipe-smoke' (default
on).
@me4502
me4502
commented
Aug 19, 2026

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How does this interact with the round robin PR? My assumption is that doing this round-robin would alleviate "stuck" pipes for the most part – so what "defines" stuck in those cases?
@RasmusKD
RasmusKD
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Aug 19, 2026

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They compose pretty well. Blocked here means a pull happened and every item came back, and any delivering pull clears it. With round robin an unroutable stack only causes one refused pulse per rotation, so at most you get a short puff before the next delivery clears it. Steady smoke only happens when nothing in the container can go anywhere, outputs full or everything filtered out, which is exactly the case round robin can't help with.
If both land I can gate the persistent smoke on a full unproductive rotation instead of a single refused pull, so the one-slot case doesn't puff at all.
@RasmusKD
Clear the blocked flag when the source runs empty
7ca6c3b
Emptying the container by hand left the piston smoking forever, since
the flag only cleared on a delivering pull. A pulse that finds nothing
to pull now clears it too, a pipe with nothing to move is not stuck.
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Smoke particles on blocked pipe pistons by RasmusKD · Pull Request #1381 · EngineHub/CraftBook · GitHub
Skip to content
Smoke particles on blocked pipe pistons - #1381
Open
RasmusKD wants to merge 2 commits into
EngineHub:masterfrom 
RasmusKD:pipe-blocked-smoke
Open
Smoke particles on blocked pipe pistons#1381
RasmusKD wants to merge 2 commits into
EngineHub:masterfrom 
RasmusKD:pipe-blocked-smoke
Conversation
@RasmusKD
@RasmusKDRasmusKD
commented
Aug 16, 2026

Copy link


Copy Markdown

Contributor
A blocked pipe system is invisible from the outside: pulses arrive, nothing moves, and finding the stuck piston means watching every piston at the exact moment a pulse happens.
A pull that is refused everywhere now marks the piston blocked, and a repeating task (every 12 ticks) keeps it visibly smoking. The next pull that delivers anything clears the flag, and the flag is also dropped when the piston or its source container is removed. The pulse-time puff is throttled per piston so fast clocks read as a steady chimney rather than a particle storm.
Gated by 'full-pipe-smoke' (default on). Same pull-loop area as #1376/#1378/#1380, happy to rebase whichever lands last.
@RasmusKD
Smoke on sticky pistons whose pull cannot be delivered anywhere
5350cf1
A blocked pipe system is invisible from the outside: pulses arrive,
nothing moves, and finding the stuck piston means watching every one of
them at the moment a pulse happens. A pull that is refused everywhere
now marks the piston blocked and a repeating task keeps it smoking, so
a stuck system can be found by looking at it. The next pull that
delivers clears the flag, and the flag is dropped when the piston or
its source container is removed. Gated by 'full-pipe-smoke' (default
on).
@me4502
me4502
commented
Aug 19, 2026

Copy link


Copy Markdown

Member
How does this interact with the round robin PR? My assumption is that doing this round-robin would alleviate "stuck" pipes for the most part – so what "defines" stuck in those cases?
@RasmusKD
RasmusKD
commented
Aug 19, 2026

Copy link


Copy Markdown

ContributorAuthor
They compose pretty well. Blocked here means a pull happened and every item came back, and any delivering pull clears it. With round robin an unroutable stack only causes one refused pulse per rotation, so at most you get a short puff before the next delivery clears it. Steady smoke only happens when nothing in the container can go anywhere, outputs full or everything filtered out, which is exactly the case round robin can't help with.
If both land I can gate the persistent smoke on a full unproductive rotation instead of a single refused pull, so the one-slot case doesn't puff at all.
@RasmusKD
Clear the blocked flag when the source runs empty
7ca6c3b
Emptying the container by hand left the piston smoking forever, since
the flag only cleared on a delivering pull. A pulse that finds nothing
to pull now clears it too, a pipe with nothing to move is not stuck.
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Already have an account?
Sign in to comment

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2 participants

@RasmusKD@me4502