http://www.osgbooks.com/books/osg_qs.html

Also search for the Performer Programmers guide from SGI 
http://www.sgi.com/products/software/performer/manuals.html
They give a more in depth oversight albeit with Performer in mind but the 
principle map directly to OSG 


Gordon

__________________________________________________________
Gordon Tomlinson

Product Manager 3D
Email  : gtomlinson @ overwatch.textron.com
__________________________________________________________
(C): (+1) 571-265-2612
(W): (+1) 703-437-7651

"Self defence is not a function of learning tricks 
but is a function of how quickly and intensely one 
can arouse one's instinct for survival" 
- Master Tambo Tetsura

 

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Frank van Meurs
Sent: Wednesday, October 22, 2008 11:19 AM
To: OpenSceneGraph Users
Subject: Re: [osg-users] Having trouble grasping OSG concepts

Jean-Sébastien Guay wrote:
> Hello Frank,
> 
>> However, I haven't the faintest idea of what I'm doing and why I'm 
>> doing the things I'm doing. I can copy code, change a few file/path 
>> strings, even add some drawables to a scene and view the new scene in 
>> the basic viewer (following the tutorials) and it all looks really 
>> pretty. But, I feel at a loss when I try to use the osgviewerWX 
>> example in my own project because it doesn't work as I expect it to 
>> and haven't got a clue why. It's probably because I forget something 
>> very basic, but I don't know that the basic thing needs to be done.
> 
> Well, if you have all that information I can't see why you would be 
> struggling with basic concepts...

I think that it's probably due to the fact that I'm fairly new at this whole 
game. I simply can't read code and understand why the code is there. Why, for 
instance, is there a GraphicsWindow and a GraphicsContext? What does the Viewer 
do and why do I need to call setGraphicsContext? Ok, from the code it's 
apparent that I should, but I haven't the faintest idea why. Reading the wiki 
or the doxygen documentation just doesn't provide me with that information.

In short, again, I would like to know the theory, the design principles, etc. 
Is there such documentation available?

> If you explain what your problems with osgviewerWX are, perhaps 
> someone who knows it well on this list can help you. You assume it's 
> something basic, but we can't know unless you give us more 
> information. What are the symptoms you're seeing?

In the meanwhile I've been able to get things working. Not in the way I would 
like everything to work, but I at least have a working canvas for OSG to render 
on.

What went wrong was that the code which was generated by wxGlade, which I used 
for building a simple GUI, simply didn't cooperate with the example code 
provided with OSG. It's quite a long story, but all in all and for the moment 
I'm a happy camper. I expect things to break apart again rapidly though, as 
soon as I try and implement something else. ;) Partly because I still only have 
but a slight understanding of what's happening under the hood.

In any case, thanks for the pointers.

Frank

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