Category: hou-cops

Archived post by mattiasmalmer

Here is the reaction diffusion stuff. I have not done any housecleaning whatsoever in this file so it is just a bunch of unrelated crap in COPS. you might like what you find.

Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20245811/22/24/OpenCL_CUSTOM_RASTERIZER_reaction_diffusion.hiplc
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20245811/22/24/image.png

Archived post by mattiasmalmer

…and so I wrote my own geo rasterizer to be able to bridge texture seams by generating a lookup UV map. Really pain in the assy stuff. But now I can generate the rain streaks without any visible texture seams at all. So that’s a significant win!
I will use this kind of rasterizer a lot.

you basically generate a adjacency uv map like this.

Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20240211/21/24/rainstreaks_OpenCL_CUSTOM_RASTIRIZER.hiplc
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20240211/21/24/houdini_ru10M0hstQ.gif
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20240211/21/24/houdini_mvhYIffZsV.mp4

[hou-cops] Archived post by mattiasmalmer

so anyways. i got that normalmap to depthmap using DFT to work in Nuke too if anyone is interested:

here is the Nuke implementation. (it is a group gizmo so you do not have to worry about using it as it becomes actual nodes in your scene.)

Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20243610/23/24/image.png
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20243610/23/24/Normal2Depth.gizmo

[hou-cops] Archived post by mattiasmalmer

aight bois! i talked to TinyTexel on shadertoy and he showed me his really cool implementation of Normal2Depth using fourier space filter inversion: www.shadertoy.com/view/XcjXDc I spent a bit of time wrapping my smooth brain around the code and managed to cobble together the same thing in COP:s using OpenCL:
it is very very fast.

Attachments in this post:
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20240410/17/24/image.png
http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20240410/17/24/fftNormal2Depth.hiplc