3d Creation Suite Integration Working Group

From Rex community wiki

For general info and about goals see Blender Conference 2009 Presentation proposal, working title Developing a Virtual Worlds Authoring Toolset

Earlier did a quick test, http://www.playsign.fi/engine/BlenderOMV

Interapplication communications

Now planning more tests, thinking of synching selection state (selected object) between Naali and Blender. Thinking of doing that locally, either with them talking directly with each other, or via a publish-subscribe server. Possible servers:

• (Opensim if can carry selection state)

• Verse (extended, using an own tag for selections)

• Some simple py thing:
  • Recipe 81614: Distributed publish/subscribe middleware architecture, http://code.activestate.com/recipes/81614/
    • requires a native lib: netsvc from http://ose.sourceforge.net/browse.php?group=python-manual&entry=modules.htm
  • circuits, which already is the Naali py plugin and event system, has the bridge module for IPC
  • (oops, not valid, is within process only for MVC and such, http://pydispatcher.sourceforge.net/)

• Other publish-subscribe servers:
  • http://activemq.apache.org/ "Apache ActiveMQ is the most popular and powerful open source messaging and Integration Patterns provider." "Apache ActiveMQ is fast, supports many Cross Language Clients and Protocols, comes with easy to use Enterprise Integration Patterns and many advanced features while fully supporting JMS 1.1 and J2EE 1.4."
  • http://qpid.apache.org/ "Apache Qpid implements the latest AMQP specification, providing transaction management, queuing, distribution, security, management, clustering, federation and heterogeneous multi-platform support and a lot more. And Apache Qpid is extremely fast. Apache Qpid aims to be 100% AMQP Compliant.", publisher example: https://svn.apache.org/repos/asf/qpid/trunk/qpid/python/examples/pubsub/topic_publisher.py

• something else?

Running within Blender

• 2.4 needs tricks to have both UI and networking update at the same time (when not using the built-in verse), see http://lists.blender.org/pipermail/bf-python/2009-June/005369.html "[Bf-python] Polling a device in Bpy" / scene redraw & timer hack

• 2.5 was studied a bit. Note also: uses py3k which must be taken into account in lib selection / making
  • Blender 2.5 notes

• Blender command port fork/branch: http://formgames.org/blender/command-port/ "The Blender Command Port makes it possible to start Blender in Python server mode. Clients can connect and send Python commands via the command port to the server."
  • in this solution a Naali module would connect to Blender and command it. Why not! (?)

• DAV client: Jonne is now writing on for Naali, same code may be reused within Blender to interface with Cable Beach if that is needed. Here is info of a non-blocking httplib solution that hopefully just works with the dav lib too, http://twistedmatrix.com/pipermail/twisted-python/2008-December/018863.html