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A Geometry Object For Each File On Disk

Hi All,

I put together a small shelf tool that populates a subnet with an object for each .bgeo.sc file found in a supplied folder path. The end goal was to leverage s@instance for file based objects. s@instance can only reference objects, not disk files.

 

In this hard coded example file I am fetching 144 debris shards into 144 geometry objects which instancing can reference.

# Populates an existing subnet with a geometry node for each file found in the supplied folder.
# The File node inside the default geometry node is populated with the filename from the folder.
# The end result is you get an object for each disk object in a folder.
import os, re


def returnValidHoudiniNodeName(passedItem):
    # Thanks to Graham on OdForce for this function!
    # Replace any illegal characters for node names here.
    return re.sub("[^0-9a-zA-Z\.]+", "_", passedItem)
    
def returnFilesLike(passedFolderName, passedFileExtension = ".obj"):
    result = []
    for file in os.listdir(passedFolderName):
        if file.endswith(passedFileExtension):
            result.append(os.path.join(passedFolderName,file))
    return result
    
def createSubnetOfFileNodes(passedPath, passedType):
    root = hou.node("/obj/geo_debris_container")        # Make sure it exists before running, choose your own name.
    if root != None:
        lst_files = returnFilesLike(passedPath, passedType)
        if len(lst_files):
            for i,file in enumerate(lst_files):
                # Create a file node for each geometry in our list.
                local_name = os.path.basename(file)
                local_name_only = os.path.splitext(local_name)[0]
                geo_name = returnValidHoudiniNodeName("geo_%s" % local_name_only)
                geo_name = geo_name.replace(".","_")

                node_geo = root.createNode("geo", geo_name)
                if node_geo:
                    # The first child is a default File node.
                    n = node_geo.children()[0]
                    if n:
                        # Assign this filename as the filepath for this file node.
                        n.parm("file").set(file)
        else:
                print "No subnet container found to contain generated results."
                
createSubnetOfFileNodes ("F:/Keep/Models/Rocks/debris_sharp",".bgeo.sc")

 

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Hmm..never heard of that attribute.

Do you know how to use it?

I have a working instance that is successfully instancing objects from within the scene using s@instance. When I change to s@instancefile and reference valid geometry path on my disk I get no output at all?

 

I tried both full and fast point instancing.

Untitled-1.jpg

ap_instancefile.hipnc

Edited by Atom

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It's been awhile since I did instancing in Houdini last time, but it was working back then. Maybe there something else you have to toggle on.

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