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This is kind of a particle system, where the particles are pushed
around through a 3D vector space treated as a flow field.
No physics are being simulated here, it's just treating the flow
field as direction vectors that are trilinearly interpolated when
sampled to produce a single direction vector. That direction
vector gets applied to particles near it.
To keep things interesting the flow field evolves by having two
distinct flow fields which the simulation progressively
alternates sampling from. For every frame, both flow fields are
sampled for every particle, but how much weight is given to the
influence of one vs. the other varies by a triangle wave over
time. When the weight is biased enough to one of the flow fields
near a peak/valley in the triangle wave, the other gets
re-populated while its influence is negligible, also
interpolating its new values with 25% influence from the active
field.
The current flow field population routine is completely random.
Yet there's a surprising amount of emergent order despite being
totally randomized direction vectors.
Currently supported settings include:
size= the width of the 3D flow field cube in direction vectors
(the number of vectors is size*size*size)
count= the number of particles/elements
speed= how far a particle is moved along the current sample's
direction vector
This was first implemented in 2017, but sat unfinished in a topic
branch for myriad reasons. Now that rototiller has much more
robust settings infrastructure, among other things, it seemed
worth finishing this up and merging.
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This has a nice side effect of being able to have no rings at all
via 0.
Note it would be potentially interesting to tap n_centers, but
that's substantially more complicated as those have allocated
state per-center. Maybe the centers= setting could be treated
as a max, then the tap could vary within that limit.
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This was hard-coded @ 20 for no particular reason.
Varying this paramater greatly affects the output, it should also
be exposed as a tap.
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Pixbounce isn't a particularly costly thing to render, but when
used as part of a composition, any time wasted with idle CPUs is
CPU time potentially stolen from other layers which could be
utilizing those CPUs.
So in this commit I've done a rather minimal conversion of the
pixbounce code to support threaded rendering. It basically
doubles+ lone pixbounce FPS in --video=mem tests here.
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Just some more res_setup baking failure path cleanups, largely
mechanical change.
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Similar to setup_interactively(), rkt_scener needs to handle
EINVAL errors on res_setup baking @ finalize.
Until now it had handled EINVAL @ finalize by failing the
operation and returning to the main scenes prompt.
With this commit rkt_scener now returns the user to the failed
setting, enabling correcting the problem.
It's a little janky, but not too bad. See comments for why.
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More setup_func conversion to returning the failed setting on
errors during res_setup baking.
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compose_setup() doesn't have any res_setup baking -EINVAL error
paths, but still transition over to enable potentially
deprecating the value-oriented variant.
What error paths it does have during res_setup baking is nested
in the underlying tile's module setup, and that should be
propagating up any -EINVAL failures with the res_setting already
populated.
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More setup_func conversion to returning the failed setting on
errors during res_setup baking.
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More setup_func conversion to returning the failed setting on
errors during res_setup baking.
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montage_setup() doesn't have any res_setup baking -EINVAL error
paths, but still transition over to enable potentially
deprecating the value-oriented variant.
What error paths it does have during res_setup baking is nested
in the underlying tile's module setup, and that should be
propagating up any -EINVAL failures with the res_setting already
populated.
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More setup_func conversion to returning the failed setting on
errors during res_setup baking.
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More setup_func conversion to returning the failed setting on
errors during res_setup baking.
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submit_setup() doesn't have any res_setup baking -EINVAL error
paths, but still transition over to enable potentially
deprecating the value-oriented variant.
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More setup_func conversion to returning the failed setting on
errors during res_setup baking.
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More setup_func conversion to returning the failed setting on
errors during res_setup baking.
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More setup_func conversion to returning the failed setting on
errors during res_setup baking.
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More setup_func conversion to returning the failed setting on
errors during res_setup baking.
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More setup_func conversion to returning the failed setting on
errors during res_setup baking.
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More setup_func conversion to returning the failed setting on
errors during res_setup baking.
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More setup_func conversion to returning the failed setting on
errors during res_setup baking.
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More setup_func conversion to returning the failed setting on
errors during res_setup baking.
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More setup_func conversion to returning the failed setting on
errors during res_setup baking.
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More setup_func conversion to returning the failed setting on
errors during res_setup baking.
Also fixed a bug while here in the style_values error detection;
it was misusing nelems() on the array when it's NULL-terminated
with a sentinel. But this was only triggered if a user force
overrided the setting with the :-prefix syntax, since otherwise
the setting had to be in the values set according to the
front-end. It was known there'd prolly be bugs when adding that
: override prefix support. A lot of the module-local setup
baking code has been neglected/bitrotted/carelessly changed over
time, depending on front-end values policing to keep things on
the rails.
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More setup_func conversion to returning the failed setting on
errors during res_setup baking.
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Switching over to the newly added setting-centric variants
enables ergonomically returning the failed setting during baking.
With this commit, modules/plato becomes the first to properly
return the setting which failed to parse during baking res_setup.
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Several modules still had vestigial ad-hoc free() cleanups on
error paths in their create_context().
Largely mechanical change of replacing those with
til_module_context_free() which is more appropriate, since the
til_module_context_t holds a reference on the setup. A plain
free() will leak that reference.
But it's only on create_context() failures which are uncommon,
so this was in practice mostly harmless...
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Having everything in fixed defines severely constrains the
diversity of particle behaviors and appearances.
This commit has been sitting around bitrotting since 2017, but
now that there's all this settings infra. and randomizing via
rtv, it seems worth landing, so I've rebased and am merging to
prevent a bitrot->rebase recurrence.
As-is, this commit ~minimally establishes a somewhat streamlined
parameterizing mechanism w/X-Macro patterns, while wiring up a
few of the obvious use cases surrounding xplode/burst, colorizing
the default sparkler explosions while at it.
It appears that when I first hacked this up I did some
experimentation with parameters as well, so there are some tweaks
to the behavior as opposed to a strict conversion of the fixed
defines to parameters. They seem minor enough to just leave be.
Plus a few minor optimizations like converting divides to
multiplies were in there.
Future commits can now wire up settings to choose from parameter
presets for different sparklers...
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Mechanical rename for clarity reasons, primarily to better
differentiate from the setup_func style
til_module_setup()/til_module_setup_full() functions.
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This sets the flash state when driven by something (like rkt).
When driven, the toggle tap will override hz altogether.
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This enables dynamic external control of the strobe's frequency.
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Clarifying trivial mechanical rename
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Preparatory commit for exposing strobe::hz as a tap, it seems
awkward to work in periods especially in the track data.
Though I do like the 0-1 range of period, though that doesn't
even hold for slower than 1HZ frequencies so... it's kind of a
lie anyways.
At least if the track is called "hz" anyone will know what the
values mean and easily reason about them. So I'm making the
setting consistent with the soon to be added "hz" tap.
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Commit 64a5b17 added this to til_module_context_t, so it's
already being tracked now making this redundant.
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This needs a bit more work, but at least filtering the same-tick
renders avoids the many-movements-per-frame potential when used
as something like a checkers::fill_module
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This needs a bit more work, but at least filtering the same-tick
renders avoids the many-increments-per-frame potential when used
as something like a checkers::fill_module
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It might be worthwhile to support >1 for these, but as-is it
crashes due to assumptions WRT shape size not exceeding frame
dimensions.
This just prevents crashes if someone tries putting a >1 value in
something like a rkt track for scale/pinch_factor.
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First stab at tapping the parameterized stuff in shapes.
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This also makes the pinches-dependent settings always get
initialized, since when tapped if you moved n_pinches from 0 to
non-zero, the pinches-dependent settings would abruptly become
relevant mid-flight. So this ensures they can have some sane
values, in case they haven't also been set via taps when
n_pinches became non-zero.
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Preparatory commit for potential n_pinches=0, sin(0)=0 which
behaves better here where n_pinches=0 should be a noop.
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Threaded rendering was added in 011d4df35
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This needs the stream pulled in so the signature changed to
accomodate that.
Also modules/rkt was calling this conditionally which won't be
compatible with the per-frame driver race model, so always call
it to maintain the driving position every frame.
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Mechanical change of ensuring what little taps are implemented
always get updated @ til_module_t.context_create() time as well
as on every frame.
This ensures the pipes are registered on stream immediately upon
context creation, rather than appearing only once the context
gets rendered the first time.
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Another trivial leak fixup.
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This triggers immediate cleanup of the replaced context.
It's being done after the new context is fully installed as the
replacement, with an eye towards enabling a baton style handoff
of the existing context's owned pipes to the replacement, for
taps they have in common. That's not being done yet, but it'd be
impossible if the gc occurred before creating the replacement,
since the existing context's pipes would already be untapped (and
removed).
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Another trivial leak fixup
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On shutdown til_stream_untap_owner() will call into the pipe_dtor
hook if set. So until now this was just (harmlessly) leaking the
rkt_pipe_t allocated by the pipe_ctor hook on the road to process
exit.
But in the interests of silencing ASAN about leaks on graceful
exit, I'm tying up these loose ends.
This dtor will also be utilized for performing a FORGET_TRACK via
Rocket once that's a thing.
While here I also got rid of the pipe_dtor return value, as it's
unused with no clear potential purpose (for now).
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This is mainly to prevent the mixer's b_module=compose default
from always sending the randomizer down a deep nested compose
scenario.
But it's also just giving the mixer random variety in both a/b
modules, while keeping compose out.
This alone seems to go a long way towards preventing
problematically deep randomized setups under rtv.
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Not bothering with fixing this because rtv needs its channels
setup redone altogether to better resemble something like
rkt::scenes, but allowing partial specification of the settings
as a means of controlling specific settings while randomizing the
rest.
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This was prevented before but lost in the shift to
til_module_setup_full() wrappers...
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