Category: hou-cops

simple little gem:
a rolloff you can use in your slap comp to get control over your highlights
“` #bind layer src? val=0 #bind layer !&dst
@KERNEL { float4 color=@src; float alpha=color.w; color=1-exp(-color); color.w=alpha; @dst.set(color); }
“`

Here’s the pighead paint cop thing. I swapped all my textures for the brush strokes to ones that i made in cops. and then i’ve also commented all of the paint stroke splatting code. It’s not hyper optimized, this is again a dumb approach where i strictly stay in COPs for everything. It’s way easier and better to do some of this stuff in sops.
if i catch you using this without modification on a commercial project i will make fun of you for forever, and i will ban you from the server 🙂

@jan1376 @flight404 have fun fellas

Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20254905/02/25/image.png
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20254905/02/25/JR_cops_painting_v0001.hip

@eetum you dont need a wrangle, no 😮 but that’s a fun aspect of OCL in cops ive never looked at.
I just whipped up a VAT example for my class, here’s the file. It directly reads attributes from the geometry input.
the file also shows how to read from this cruddy VAT texture to apply the animation back onto the demo geometry (in this case a pighead)!

Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20255004/01/25/JR_openCL_VAT_example.hip
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20255004/01/25/image.png

Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20254303/27/25/cop_Malmer.dev.Grade.1.0.hdalc

Demo File of the Rocks above , Enjoy

@flight404 simpler node tree on this one

ah sec, let me clean something up, theres some left over copstance nodes in another tree that might cause errors

there we go

Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20255303/25/25/Cops_Rock_AdadMorales_Demo.hiplc

Anyways. Here is the LatLong HDA package.
Please let me know of any issues.

Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20254303/10/25/latlong_HDAs.zip
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20254303/10/25/image.png

New node just dropped:

Node for aligning latlong panos

it will make a nice set when done:

Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20251303/07/25/cop_mattias.assemble_latlong.1.0.hdalc
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20251303/07/25/houdini_jORqJfHeCw.mp4
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20251303/07/25/houdini_CUbZsI2bWL.mp4
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20251303/07/25/cop_mattias.latlongorient.1.0.hdalc
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20251303/07/25/image.png

bent normals help.

mathematical marbling:

Good for all your 70:s carpet needs.

Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20250503/06/25/houdini_U71NKsuAXm.mp4
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20250503/06/25/mathematical_marbling.hiplc
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20250503/06/25/image.png

Why i made my own? No real reason. It is fast and has very few options.

I was mostly trying to learn

playing with something called laplacian blend.

it is a really nice way of blending two textures where high and low frequencies in the image are blended at different mip levels so that things blend into oneanother in a really pleasing way.

as you can see there is none of the ghosting that an ordinary soft masks gives you.

it does a really nice job of blending heightfields. you can see that there is no loss of high frequency data and yet there is no discontinuity in height.

try it yourself!

Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20252802/22/25/image.png
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20252802/22/25/houdini_T7K8veeuDK.gif
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20252802/22/25/laplacian_blend.hiplc
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20252802/22/25/houdini_9nOteyN3Wv.gif

slight issue with the intrinsic transform there.

Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20254402/03/25/cop_to_heightfield_fixed.hiplc