Import a whole folder of images in one time? (no sequence)

[Krion]

Hi,

 

I would like to import a whole folder of images and use them for randomness effects / iterate over them / etc.

But it is no images and they are all named differently.

 

Is this possible?

 

Thanks in advance.  

[StepbyStepVFX]

You want to import them where ? In COPs by creating nodes that read random omages in a folder (so as many nodes than images ??) ? Or do you want to generate a path attribute on geometry or parameter on a node that takes random values among all the path and image names of a folder ?

In both cases, Python is the answer.

Otherwise, is they are named sequentially already in your folder, you can easily rebuild a string that match that in VEX.

We probably need more info on what you want to achieve precisely to guide you.

Edited October 2, 2019 by StepbyStepVFX

[Krion]

I want something like this:

To import a whole folder of images and be able to have a parameter that goes through them (like you can with the "Select Input" parameter on a switch).

And then I wanted to use a Trace SOP on it, but now I see that the Trace SOP has no input, but only a file-path parameter itself.. 

 

Hope it is possible in VEX because that I know a bit.

Can you also 'rebuild a string' in VEX when they have the same prefix, but not numbered sequentially? 

Like: 

Person.Bob.jpg

Person.Jane.jpg

 

Thanks again.  

Edited October 2, 2019 by Krion

[konstantin magnus]

Hi Dave,

you could feed the trace SOP with image file paths from a python node:

import os
import glob

node = hou.pwd()
node_tracer = hou.node('../trace1')
dir = node.evalParm('dir')
num = node.evalParm('num_img')

path = hou.expandString(dir)
os.chdir(dir)
files = glob.glob('*.jpg')

total_num = len(files) - 1
num = max(min(total_num, num), 0)

image = files[num]
node_tracer.parm('file').set(image)

 

read_image_folder.hipnc

[Krion]

Hi Magnus,

 

How would that work? What do I fill in here?

I have already chosen a directory.

[konstantin magnus]

1 minute ago, Krion said:

What do I fill in here?

Nothing. The python script should fill it. If it does not replace the 2nd but last image line with:

image = path + files[num]

 

read_image_folder_fullpath.hipnc

[Krion]

Thank you.  It works. Also had to connect the python node under the trace. Great!

 

I quickly need to learn Python too. 

How good do you think you need to be in VEX before you tackle Python? 

[konstantin magnus]

22 minutes ago, Krion said:

How good do you think you need to be in VEX before you tackle Python? 

As long as your Python usage is only about listing files, setting parameters, creating nodes and such I don't think you have to wait. The language has very little to do with VEX anyway.

I mainly put together my python scripts by combining results from stackoverflow, odforce threads and SideFX's documentation.

[ashu_tosh_m]

On 3/10/2019 at 1:15 AM, konstantin magnus said:

As long as your Python usage is only about listing files, setting parameters, creating nodes and such I don't think you have to wait. The language has very little to do with VEX anyway.

I mainly put together my python scripts by combining results from stackoverflow, odforce threads and SideFX's documentation.

any idea how to import cache sequence from multiple folder using python.

 

Basically i wedge a simulation and i want to import all cache once and add a switch node to select the best output