Set voxel value with Python in a hou.VDB

[Efi 0]

Hello,

I need a way to set the value of a voxel of a hou.VDB with python.

Do you know if there is  an equivalent to the setVoxel() function used to the hou.Volume for the vdb ?

Thanks in advance,

[bunker 288]

why not use VEX? Python is extremely slow and single threaded.

[Efi 0]

I need to specify the volume's name with a variable because I use a multiparm block to collect the volume name.

I didn't find a way to specify the name by variable with vex so I try first to generate vex with python, something like this 

content = "@" + volume_name + " = " + volume_value + ";"

return content

But the problem with this solution is that the wrangle is in a for loop (for the multiparm block) and so on it crash sometime because of the update of the vex code. So I did it on python, but I'm stuck with vdb volume.

I would have liked to do it in vex but for that I would need a function like point 

setpointattrib(0, name, @ptnum, value, "set");

It's for the tool of this video (time : 01:34)

 

[bunker 288]

in a volumeWrangle, if you turn off Autobind by Name
you can separate the volume Name in SOPs from the volume name in VEX.
here, density can be referenced to any string attribute

bindName.hiplc

[Efi 0]

Great. Thanks a lot I will try this way.