def __init__(self, id, name, effect, xmlnode=None):
"""Creates a material.
:param str id:
A unique string identifier for the material
:param str name:
A name for the material
:param collada.material.Effect effect:
The effect instantiated in this material
:param xmlnode:
If loaded from xml, the xml node
"""
self.id = id
"""The unique string identifier for the material"""
self.name = name
"""The name for the material"""
self.effect = effect
"""The :class:`collada.material.Effect` instantiated in this material"""
if xmlnode != None:
self.xmlnode = xmlnode
"""ElementTree representation of the surface."""
else:
self.xmlnode = E.material(
E.instance_effect(url="#%s" % self.effect.id)
, id=str(self.id), name=str(self.name))
