here’s the .hip file of the title cards for each new ‘chapter’ I used in my equinox presentation 🙂
Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20254710/10/25/mmaammaaaaaaoooeeeoooo.mp4
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20254710/10/25/somecooltext.hip
maybe. here’s the .hip for the self regenerating patterns, some other small experiments in there too
if it still dont work lmk
Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20255910/09/25/somerdfun.hip
alright here’s something – it uses a similar method to mmColorTarget but is mostly in SOPs, I think it would be quite awkward purely in COPs unless there’s python or expression access to pixel values now in 21.0… it can restore quite busted chart images like the left one back to ACEScg primaries and it’s fast enough to update as you drag the handles around <:tide_pod:415308365942620161> i realise i’ve done this in apprentice which wasn’t very clever of me but maybe an adult could adapt it to be a bit smoother anyway, maybe inside a COPs HDA
Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20254609/23/25/Screenshot_2025-09-23_at_23.21.30.png
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20254609/23/25/Ls_MatrixFromChart_v01.hipnc
here is the contact sheet packer inside native copernicus context very hacky and very fast though
relies on couple of hacks: * access to time dependent source inside “simulated” block – so packing is basically frame by frame sim * “custom” Time Shift COP based on h21 python snippet
so how is this reliable i’m not sure
here is the hip (i cleaned up it a bit)
i wonder now if i can remove time dependency on time shift (though may be it’s just not possible and I need a stash after that)
hm, the above just leads me to an interesting conclusion
looks like `$F` (`hou.frame()` or `hou,time()`) are evaluated in simulated block context this is basically just one backdoor to inject dependency in block
it’s just one number but can be exploited already for example a packing variations of any op like this example where sdf shape dependent on frame. it’s still cumbersome but randomized contact sheet from *any* operator is quite possible
no, i think i got it wrong, here is what i got from analyzing evaluating path sorry if this is known, but i think it’s quite interesting for block programming
* Compiled block is baking block to apex graph. No expressions, all parameters are evaluated and baked – so no easy iteration and requires this hack of either layer with int or geometry with detail attribute (considering it has a feedback), parametrizing operators is very hard, at least for now, I guess in future sidefx adds additional evaluating context * Simulated block – _all_ expressions are evaluated, this is not an apex execution, it’s a live network. No need for iteration hack – iteration is `$F`. Way easier to parametrize (all expressions are “live”) but getting the result at X iteration is hacky, but easily solveable via Python COP and pulling layer at specific frame
Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20253509/23/25/sheet.gif
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20253509/23/25/sheet-as-sim.hip
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20253509/23/25/image.png
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20253509/23/25/cop-frame-expression.hip
so anyways… the beautiful flow_projectnondivergentmultigrid can also be used to build a heightfield from a normalmap like so:
the name rolls of the tongue
Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20250609/09/25/image.png
if you toss a “flow_projectnondivergentmultigrid” on your motion vectors you get really nice warping action in your distorter there
Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20251509/09/25/houdini_A4GllmPvt8.mp4
made a vectorscope too.
i tend to like having my vectorscope align with how the colors are spread out in the color pickers. so i made it my way. but it is easy to change in the code. (i provide the more common weights in there if you like that better)
it is great when doing color correction.
Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20251009/08/25/houdini_8RTPAUMZeN.mp4
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20251009/08/25/vectorscope.hiplc
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20251009/08/25/houdini_nOPvqR2Gsl.mp4
a little waveform scope generator:
Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20251009/08/25/waveformGenerator.hiplc
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20251009/08/25/houdini_w5mbAP1gBI.mp4
Cool little snippet – you can use flow_projectnondivergentmultigrid to make chaotic non tiling mono images tile
Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20253509/04/25/image.png
For various reasons I always end up needing a tree mask in COPS, so I wrote a wrange to generate them.
Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20254708/25/25/67D266A0-E79B-4147-B3C5-E5FC57F33AB4.png
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20254708/25/25/C3F7C077-1061-4D7D-A9CF-FEE53962C035.png
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20254708/25/25/message.txt
