Amazon VERSION 2.0V1 Betriebsanweisung PDF herunterladen (Seite 195)

195

locationDataChangeEvents = client.getAndResetChangedLocations()

if not locationDataChangeEvents:

return

# Iterate over each location we've been informed about and interrogate it

for event in locationDataChangeEvents:

location = event.getLocationPath()

locationData = event.getLocationData()

locationAttrs = locationData.getAttrs()

if not isinstance(locationAttrs, FnAttribute.GroupAttribute):

continue

# Only look at locations of type 'light'

typeAttr = locationAttrs.getChildByName('type')

if (not isinstance(typeAttr, FnAttribute.StringAttribute)

or typeAttr.getValue('', False) != 'light'):

continue

# Only want to look at xform or material updates

for attrName in ('xform.matrix', 'material',):

attr = locationAttrs.getChildByName(attrName)

# Do something with attr

Advanced Topics

Caching

There are a number of caching systems maintained by various Geolib3 sub-systems. This section covers Runtime-

based caches and Client LocationData caching.

Runtime-based Caching

The Geolib3 Runtime maintains a cache of previously computed (Op, location) pairs. It maintains another cache for

"scattered queries", made during the cooking process. The lifetime of entries in these caches is explicitly managed

through the Client API; see FnGeolibRuntime.h : client.evict(primaryPathToKeep).

24 OP API | ADVANCED TOPICS

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Amazon VERSION 2.0V1 Betriebsanweisung Seite 195