Subject: Re: Thoughts on the Gabe Newell 's Mac comments. 2007-10-02 - By Chris Niederauer
Back
On Oct 2, 2007, at 10:36 AM, Peter wrote:
>> I would say the MAIN issue is DirectX vs OpenGL, a lot of developers
>> seem to think you can't achieve all the things in OpenGL that can be
>> done with DirectX, I personally I have yet to see anything that can't
>> be done in OpenGL,
>
> Sure, there isn't anything you can do in D3D that you can't do in GL,
> but it's a hell of a lot easier in D3D most of the time. Even
> something as simple as non-rect textures is a chore in GL, and quite
> often, you're writing multiple code paths to get the most out of
> hardware, where on D3D, it only requires one.
>
> A good example that I always quote, is Carmack with the Doom 3 engine.
> He had to have 3 codepaths - an nVidia one, an ATI one, and a (slow)
> ARB one, just to get full performance. If he had used D3D, he would
> need only ONE codepath.
>
> ID Tech 5 is based on D3D, btw... although Carmack plans to add a GL
> backend at some point.
id Tech 5 was shown for the first time running on a Mac at WWDC in
2007. I am not sure where you heard that John was added a GL backend
after the fact? It currently runs on all 4 major platforms (sorry,
Wii!) and I personally know that statement to be incorrect. And has
been said earlier, a lot of Direct3D games use the exact same trick of
making multiple code paths for different cards. It is not inherent to
the API but a matter of maximizing performance.
Chris
__ ____ ____ ____ ____ ____ ____ ____ ____ ____
Do not post admin requests to the list. They will be ignored.
Mac-games-dev mailing list (Mac-games-dev@(protected))
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/mac-games-dev/junlu%405341.com
This email sent to junlu@(protected)
|
|
