.:: Indigo 0.9T5 and Exit Portal -- second part

tizxx · Post by **tizxx** » Mon Aug 13, 2007 9:40 pm

Look at this image,

If I have a room with 2 or more aperture I must fill it with Exit portal...
The SUN is masked out by exit portal?

suvakas · Post by **suvakas** » Mon Aug 13, 2007 9:44 pm

Yes, you have to cover all openings with ep. from where you want the sun to get in. Rays are traced only towards and from exit portal. That's from where the speed-up comes from.

[edit]
Exit portal is telling Indigo from where the sun should get into the room. Then it doesn't have to shoot rays to places where are no openings.

tizxx · Post by **tizxx** » Mon Aug 13, 2007 9:49 pm

Ok, suvakas, and Ono

when I turned off bidirectional I can see the sun,
but out-side the window with exit portal on
I can't see out-side the room...

look this image...

suvakas · Post by **suvakas** » Mon Aug 13, 2007 9:57 pm

Hmm..now that is interesting.
Ono?

Post by **OnoSendai** » Mon Aug 13, 2007 10:10 pm

It does indeed look like a bug, will have a look at it soon.

tizxx · Post by **tizxx** » Mon Aug 13, 2007 10:19 pm

I post the scene so we can test it...

Kram1032 · Post by **Kram1032** » Tue Aug 14, 2007 4:07 am

oh, aha...

I never tried Exitportals without BiDir xD

very interesting...
so, then, they work different, than I thought....

Anyway, wouldn't it have been better, to have
.:: Indigo 0.9T5 and Exit Portal
NOT scattered into parts?
Everything should be in ONE thread...

mrCarnivore · Post by **mrCarnivore** » Tue Aug 14, 2007 7:40 pm

So is there acutally a speedup when using exit portals without bidir in comparison with a scene without exit portals and without bidir?

Post by **OnoSendai** » Tue Aug 14, 2007 9:23 pm

Regarding the first image, Suvakas is correct.
When using exit portals, all openings to the environment need to be covered, if there are any gaps, they will show up as blackness.

Regarding the second image, actually it's not a bug (obviously in retrospect)
The plane outside the room is not visible thru the exit portal, because geometry isn't visible through exit portals, but just the environment (skylight in this case)

suvakas · Post by **suvakas** » Tue Aug 14, 2007 11:04 pm

OnoSendai wrote:Regarding the second image, actually it's not a bug (obviously in retrospect)
The plane outside the room is not visible thru the exit portal, because geometry isn't visible through exit portals, but just the environment (skylight in this case)

Ok. But why isn't the opening without exit portal black as on bidir rendering? To me it seems like rays are traced like there is no exit portal present in the scene.

Post by **OnoSendai** » Tue Aug 14, 2007 11:31 pm

It doesn't really matter, you're in the realm of undefined behaviour anyway.

Kram1032 · Post by **Kram1032** » Wed Aug 15, 2007 12:56 am

aha...
so, you simply didn't define that? xD

Post by **OnoSendai** » Wed Aug 15, 2007 1:00 am

Undefined behaviour means you're doing something you shouldn't be doing, so anything can happen; it's not my problem

Kram1032 · Post by **Kram1032** » Wed Aug 15, 2007 1:02 am

"you shouldn't use exitportals WITH.."
or
"...WITHOUT" Bidir?

tizxx · Post by **tizxx** » Wed Aug 15, 2007 1:08 am

Ok. Nicholas. don't worry.

Thank you for your answer.

.:: Indigo 0.9T5 and Exit Portal -- second part

.:: Indigo 0.9T5 and Exit Portal -- second part

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