view-frustum culling VS objects azimuth/elevation tests ?

Jun 21, 2012 at 5:20pm

view-frustum culling VS objects azimuth/elevation tests ?

hi there,
I have been point to view-frustum culling by Robert.
I worked a lot about that,more because it was unfamiliar to me than because it is really hard, and at 80% of the walk, I have doubts about the benefits of this technique considering:
- I have glowing objects which HAVE to … glow everywhere around my cam even if not directly visible.
- I need a far far-clip (not 1000000, but I mean, more than the usual 200)
- I already calculating azimuth / elevation of my objects relatively to my cam for sound purposes

The first statement would drive me to consider a culling angle smaller than (360° – lens Angle) and even … maybe, if an object would be behind, it would have to light the stuff in front of the cam…

The second one is also a cons arguments considering the view frustum culling technique.
I read a lot that far far-clip of course decrease the ratio benefits/cost

The third could drive me to use those value to make almost the same thing than view frustum technique, considering all my objects that have to be culled are spherical (homogeneous dimension I mean)
Indeed, I need that for sounds, so EACH objects know about its azimuth/elevation relatively to the cam.
I can easily use them to inactive objects in a particular space quadrant of the cam local space for instance..

I’d like to have your opinions, maybe some leads around all of that.
I’m sorry if this is a “strategy” question, I’m sure this forum doesn’t have to be only “how to find the quat from a cam?” or that kind of questions (I’m almost everytime asking these latter, myself)

#45730
Jun 21, 2012 at 5:44pm

hi julien. this question is probably better asked and researched at a site like gamedev.net.

#164895
Jun 21, 2012 at 5:48pm

Ok
I’ll do that.

an opinion from you, if I may ask?
i’m interested anyway :)

#164896
Jun 21, 2012 at 5:57pm

well it sounds like you’re trying to build a kind of 3d game engine/editor (or at least a scenemanager), so i would research those topics, as there is tons of books and online articles available.

#164897
Jun 21, 2012 at 6:37pm

yep I understood the similarities.
you indeed already advised me to go a bit around of those topics.
I’m “just” building my composition & performance environment :)

I just subscribed there and keep you posted via my blog and probably a project page here.
and I’ll continue my travel trying to better focus on pure max6 stuff here.

#164898

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