Hi,
maybe you are looking for userData? Grep the include dir for userData or
UserData.
jp
Sukender wrote:
Hi all,
I'm working on a project that needs to add various data/metadata to the nodes.
I was wondering:
1. Does something already exists for this (more flexible than the description
string list)?
2. How would you implement this?
Personnally, I was looking towards aggregation. See
http://cowboyprogramming.com/2007/01/05/evolve-your-heirachy/ and other similar
articles to know what I mean. So I suggest to add something to nodes, using a
compile-time option (in order to be able to turn it on or off when running
CMake). For instance, there would be:
- A Component abstract class (a very simple one)
- A list of components in nodes (directly in the Node class, or by making Node
inherit from something like a ComponentContainer class). Something like the
nodes list in osg::Group sounds good (as it will be familiar to OSG users).
- And a ComponentManager class, which references the components (weak references) by type, so that
you can easily and quickly iterate over all "Physics" components, "AI"
components, or whatever-components.
That way, you may add whaterver component you need to any node. Say you need to add a meta to a node?
Create a MetaComponent (Name + value), and call node->addComponent(new MetaComponent("Creation
date", "2009-08-13"));
I already coded something, but it's not really clean right now. Depending on
your answers and on the moment my code will be cleaned, I'll send code to
osg-submissions.
Thanks.
Sukender
PVLE - Lightweight cross-platform game engine - http://pvle.sourceforge.net/
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