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ExamplesDataCompoundObjects
Ben Toogood edited this page Jun 13, 2013
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The CompoundObject class provides string-keyed storage of Cortex objects with IO functionality. Think of it as a struct that you can assemble dynamically.
Here we store a single int and an array of floats in a CompoundObject.
from IECore import *
single_number = IntData( 123 )
multiple_numbers = FloatVectorData( [ 1.0, 2.0, 3.142 ] )
object = CompoundObject()
object['a_single_number'] = single_number
object['some_more_numbers'] = multiple_numbers
Writer.create( object, "test.cob" ).write()
object2 = Reader.create( "test.cob" ).read()We can also store CompoundObjects within CompoundObjects, allowing us to create hierarchical data.
from IECore import *
child = CompoundObject()
child['numbers'] = FloatVectorData( [1.0, 2.0, 3.142] )
child['strings'] = StringVectorData( ["hello", "world"] )
parent = CompoundObject()
parent['child'] = child
Writer.create( parent, "test.cob" ).write()
copied_object = Reader.create("test.cob").read()We are using the ObjectVector class to work with arrays of CompoundObjects. Note that each entry in the array could have a different structure.
import IECore
objvec = IECore.ObjectVector()
for i in range(0,5):
#create an object with some data
element = IECore.CompoundObject()
element['id'] = IECore.IntData( i )
element['name'] = IECore.StringData( "bob_" + str(i) )
#append it to the object vector
objvec.append(element)
IECore.Writer.create( objvec, "test.cob" ).write()
copied_objvec = IECore.Reader.create("test.cob").read()
for x in range(0,len(copied_objvec)):
print copied_objvec[x]which yields
IECore.CompoundObject({'id':IECore.IntData( 0 ),'name':IECore.StringData( "bob_0" )})
IECore.CompoundObject({'id':IECore.IntData( 1 ),'name':IECore.StringData( "bob_1" )})
IECore.CompoundObject({'id':IECore.IntData( 2 ),'name':IECore.StringData( "bob_2" )})
IECore.CompoundObject({'id':IECore.IntData( 3 ),'name':IECore.StringData( "bob_3" )})
IECore.CompoundObject({'id':IECore.IntData( 4 ),'name':IECore.StringData( "bob_4" )})- Introduction
- General Functionality
- Data Handling
- Parameters and Ops
- Point Primitives
- Mesh Primitives
- Image Primitives
- Procedurals
- Cortex & Python
- Cortex & Maya
- Cortex & Houdini