Someone sent an alert to the moderating team about Mark's post, on the assumption that the poster wasn't really Mark Kilgard. Just to make things clear: as Alfonse Reinheart pointed out earlier in...

Well, I meant to mention this in my original post but I forgot about it by the time I reached the end!

So what I usually do in such case is to sort my vertex list on X, then Y, then Z.

So if I...

In order to calculate normals properly at each vertex, you'll first need to know the connectivity between your triangles which cannot be done directly with STL files.

In my STL parser, I maintain...

As a side note, I'll add that if you're only interested in such boolean operations (i.e. making holes) with "flat surfaces", you may want to have a look at the Tesselator object available in the GLU...

This is more of a Maths-related question. Simply look at how a sphere is drawn and restrict one of the two parameters so that you only get half a sphere. I'll move your topic in the correct section.

This is more of a Maths-related question. Simply look at how a sphere is drawn and restrict one of the two parameters so that you only get half a sphere. I'll move your topic in the correct section.

It would be more appropriate to post this question in the Beginners section.

Regarding your problem, have you checked the orientation of the generated triangles in GLU_FILL mode...

It would be more appropriate to post this question in the Beginners section.

Regarding your problem, have you checked the orientation of the generated triangles in GLU_FILL mode...

Actually, there is a page on this web site that gives you some directions to start using OpenGL:
http://www.opengl.org/resources/faq/getting_started.html

At least now we can avoid getting a new D3D/OpenGL debate once a week! http://www.opengl.org/discussion_boards/ubb/wink.gif

I suppose the 2D acceleration mentioned here refers to accelerating GDI calls only. Even if you are using OpenGL only for 2D, you need 3D acceleration to get hardware acceleration with OpenGL.
...

Nakoruru,

Thanks a lot for this detailed explanation. I suppose then that all software (games or professional applications) use some kind of BSP in order to render transparent objects properly.
...

Tom,

That may be a really good idea indeed. I'll try to implement it as soon as I understand the paper.

While I am doing that, I am still interested in knowing how other people actually do that...

Last time I had a look at it, Depth Peeling was interesting but much too slow even for my GF4. I doubt it will be of more use to my clients.

As far as BSPs are concerned it is true that I could...

Well, I have read many things and here is what I found:

1) Sort according to the distance between the closest vertex and the viewing plane.
2) Sort according to the distance between the farthest...

Hi there!

I have been away from these forums for quite a while but I have a new problem with one of my 3D engines and need some help from experienced users.

My problem is a "classic": I have...

You'll find an example of this in MSDN:
http://support.microsoft.com/default.aspx?scid=kb;en-us;127071

Most of my applications use both MFC and OpenGL and are loosely based on information...

V-Man,

I was also contacted by the webmaster a while ago (May 29th!) to see if I would be interested in moderating the forums (I sent numerous e-mails regarding this problem in the past!).

As I...

Just had a quick look through the archives and found some interesting topics about behaving correctly (shame on me!) and moderators:
...

knackered,

I think you are probably right: beginner questions started the thing but then I realised people posting them had some good arguments (mainly that their questions were not answered when...

I volunteer as well, although I am not on these forums as often as I used to. But the reason is precisely that I got fed up with trolls posting anything and everything. Having to read 10 useless...

Hi Nutty! Long time no see...

I am just being curious here: do you realize your question sounds strange??? I mean, almost any new card brings new extensions...

What do you have in mind asking...

As the others did, I'd just like to thank you for all the help you provided, both here and through e-mails.

Hope you'll find what you're looking for in your new position at NV!

Regards,

Eric

I should come here more often...



C++, are you sure you know C++?

You can have a look here:
http://www.markmorley.com/opengl/frustumculling.html

There's a topic that says "Is the box in the frustum?" which gives a way of solving your problem.

Regards,
...