Component based object management + Scene graph question

Well one thing is sure. In GPG they dont't talk crap. If someone can publice an article there, then you can be sure it's not BS.

True. That was my secondary question while I thought about how to word my original question. Updated original post to what the question really was.

I didn't see your post before it was edited, but if the question was about the article by Bjarne Rene in GPG5, then I did a fair chunk of the design and implementation of that system so I can probably answer any questions you have. And if not, Bjarne's sat opposite me :)

I'm not totally clear on what you're asking in your main question, but if I understand right, what we used in our implementation was a hierarchy component which was used to track parent/child relationships between objects. Also, for the sake of performance, we kept a pointer to the position component in all the other components of each object. As just about everything needs quick access to the position information, it seemed a reasonable tradeoff to add a few bytes to each component to cache a pointer, and save the cost of multiple lookups each frame.

Quote:

Original post by James Sutherland I'm not totally clear on what you're asking in your main question, but if I understand right, what we used in our implementation was a hierarchy component which was used to track parent/child relationships between objects. Also, for the sake of performance, we kept a pointer to the position component in all the other components of each object. As just about everything needs quick access to the position information, it seemed a reasonable tradeoff to add a few bytes to each component to cache a pointer, and save the cost of multiple lookups each frame.

Ok, that is what I was thinking at first and then over thought it.

My main concern with the gpg article was really answered by writing the question out and figuring it out myself. the only thing that bohers me is the messages, components, and interfaces have to be known at compile time. I guess it could be worked around if it needed to be dynamic.

Thanks