Hi,

Following the same setup for OpenCL kernels in the OpenCL node, the generated kernel snippet gives a void * type pointer to the bound VDB. Also, there are no readable/writeable checkboxes in the bindings for VDB type parameters. After searching on this forum and googling for a while, I still couldn't find a feasible way to interact with VDBs in the OpenCL node. Any help is appreciated!

Thanks,
Peter

Just found two headers in the ocl/include path:


Then a recast to cnanovdb grid:

Voila! Now I can use cnanovdb family of functions to read VDBs.

Hope this helps!

bwu
Just found two headers in the ocl/include path:

#include "CNanoVDB.h"
#include "CVDBUtil.h"

Then a recast to cnanovdb grid:

const global cnanovdb_griddata *grid = (const global cnanovdb_griddata *) vdb;

Voila! Now I can use cnanovdb family of functions to read VDBs.

Hope this helps!

Only "CVDBUtil.h" must be included, the other two headers are included in it:
Here is the explanation with an example from Matt Puchala:
https://vimeo.com/477072175 [vimeo.com]

In Houdini 20, OpenCL SOP and Gas OpenCL DOP can write to VDBs;
https://www.sidefx.com/docs/houdini/news/20/vex.html [www.sidefx.com]