[nahil]

I'm asking myself whether Sinbad and OGRE support multiple instances in the same process.
It might sound as nosnese, but some class of applications requuire this. These are those that themselves serve as libraries.

If the answer to the question is yes, I have some objections against singletons and will post it in the 'singleton' thread.

Below I'll outline a few application scenarios:

Sinbad is designed not only for games, but for a wider range of applications, right?
Imagine an ActiveX control or a KDE component that can be used by special-case applications for viewin CAD models. Now, what happens if such a special-cased app wants to be able to load multiple CAD files in multiple windows ('Multiple Document Architecture' in Windows/MFC speek)? Each instance of the class backing a document window would load its own instance of the ActiveX control.

Or someone (me) might want to write a web browser plug-in that displays 3D content on web pages, like Flash does for 2D. X3D (www.web3d.org is the language for this, and there is a whole market around it.)

Such a plug-in could be used to publish CAD models on the web - after LOD reduction - e.g. for discussion with their customers in a business-to-business setup. Or architects could show their ideas to the public. And there is also the concept of ad-games. Or imagine map24.com in 3D. Other markets are online entertainment or geo visualization.

Can multiple instances of that web browser plug-in be integrated in the same web page? Or what should happen if two pages contain such a 3D object, and both browser windows are backed by the same process (mozilla likes to do this)? Each instance of the plug-in would create its own instance of Sinbad.

[csauls]

I believe one would only have to load OGRE/Sinbad once, and use multiple scene hierarchies, one for each "window"/"view"/"render matrix" the application is producing.

But I'll have to look at it. I don't know if there's an OGRE precedent on the issue.
_________________
Chris Nicholson-Sauls

[nahil]