Image per primitive

[Ezz]

Hi good folks!!

I am playing with Python(expression) i Houdini and I am allready stuck with some syntax-problems.

What I want is to assign a primitiveattribute(string) called "map" with this Hscript-expression like this:

$HIP\pic\butterfly`$PR % 7+1`.pic

but i Python. My goal is to point at a folder, on my harddrive, with random jpg`s(or like) and let the expression figure the rest out.

What I have so fare is:

import os

file = os.filepath("U:erik/pictures")

texturepath = file[primitivenumber] - Here I am stucked!!

return texturepath

Is there a method to this like the above descriped Hscript??

Thank you very much!!

Erik

[anim]

to get equivalent to $PR in Python (on nodes that evaluate per primitive) you can use

lvar('PR')[/CODE]

or

[CODE]pwd().curPrim().number()[/CODE]

[Ezz]

Hi Thomas

Thank you for guiding me in the right direction. Here is the expression so far:

import os

thepath = os.listdir("U:/martin/awesome 3d stuff/")

mod = len(thepath)

primnum = int(lvar("PR"))

myimagenumber = primnum % mod

tex = ("U:/martin/awesome 3d stuff/" + thepath[myimagenumber])

return tex

Next step is to make a variable from a nulls file-parameter, so that I dont have to write the images path in the expression. Just to make it easier to point at the files.

Thanks again :-)

Erik

[Ezz]

Hi.

Here is a file with two ways of fetching files via Python.

My next goal is to put several imagesequences in the same folder and have different sequences pr primitive.

I miss a smart Python-trick to isolate the different filenames in a list.

Let say I have 300 frames in one list called [ fileA.0000.jpg -> fileA.0099.jpg, fileB.0000.jpg -> fileB.0099.jpg, fileC.0000.jpg -> fileC.0099.jpg ]

How can I make a new list containing only containing [ fileA, fileB, fileC ] ??

Cheers Erik

fileOnPrim_v002.hipnc