Debug print out Alembic PolyMesh attributes

print_alembic_shape_attributes.py

import alembic

def _print_properties(property, depth=1):
    
    # Property name
    print ("\t" * depth) + property.getName()
    
    # Metadata
    metadata = property.getMetaData()
    if metadata.size():
        # Can hold things like "sourceName" for UVs
        print ("\t" * depth) + "      - metadata -> %s" % metadata        
    
    # Header (check whether it's marked as UVs)
    header = property.getHeader()
    if hasattr(header, "isUV"):
        is_uv = header.isUV()
        if is_uv:
            print ("\t" * depth) + "      - " + "header -> isUV=%s" % header.isUV()
    
    print("")

    # CompoundProperty print children
    if isinstance(property, alembic.Abc.ICompoundProperty):
        num_sub_properties = property.getNumProperties()

        for i in range(num_sub_properties):
            sub_property = property.getProperty(i)
            _print_properties(sub_property, depth+1)
    

def print_alembic_shape_attributes(filename):

    filename = str(filename)    # ensure str
    archive = alembic.Abc.IArchive(filename)
    root = archive.getTop()

    iterator = list(root.children)

    for obj in iterator:

        md = obj.getMetaData()
        if alembic.AbcGeom.IPolyMesh.matches(md):
            
            polymesh = alembic.AbcGeom.IPolyMesh(obj, alembic.Abc.WrapExistingFlag.kWrapExisting)
            schema = polymesh.getSchema()
            print obj
            
            uv = schema.getUVsParam()
            if uv.valid():
                print "\t", "polymesh (UV parm)"
                _print_properties(uv)
            
            # Arbitrary Geometry Parms
            arbgeomparms = schema.getArbGeomParams()
            if arbgeomparms.valid():
                # Should always be valid
                _print_properties(arbgeomparms)

            # User Properties            
            user_properties = schema.getUserProperties()
            if user_properties.valid():
                _print_properties(user_properties)
            
            print("")

        # include children for coming iterations
        iterator.extend(obj.children)
    

path = "path/to/alembic.abc"
print_alembic_shape_attributes(path)

Hi there,

Thanks for this! Extremely helpful for a beginner with alembic! One question (forgive me if its a noob question). I have the script working and printing the shape Attributes, but I cant figure out how to print the value of the attribute - I'm expecting the attribute "myMaterialTag" to return string of "test". what am i missing? Output below:

print_alembic_shape_attributes(path)
/pSphere1/pSphereShape1
.arbGeomParams
- metadata -> .arbGeomParams

	myMaterialTag
	      - metadata -> arrayExtent=1;isGeomParam=true;podExtent=1;podName=string

Thanks in advance for your help.