Author Topic: Contrails  (Read 1895 times)

Offline Anaxogoras

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Re: Contrails
« Reply #30 on: May 20, 2009, 08:54:57 AM »
Flight physics are responsible for a noticeable difference in fps?  How do we know this?  Flight physics should count for far less Cpu power than graphics, which is evident from the fact that reducing visual detail or resolution improves fps.

The lengths to which some of you go to defend HTC is really amusing sometimes. :lol
« Last Edit: May 20, 2009, 08:58:02 AM by Anaxogoras »
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Offline LLogann

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Re: Contrails
« Reply #31 on: May 20, 2009, 09:03:01 AM »
You don't write code do you brotha?  Defend HTC?  I just got off a week ban, they can kiss my grits....  :devil  I simply defend the truth.  The video card has less to do with frame rate then you may be aware of.  Of course until HTC tells you that, you'll continue to believe the lies.  Ingame processes play just as big a part.  The graphics can't keep up... Okay, that makes sense..... But what if the CPU can't keep up?  Flying a plane in AH is much close to really flying a plane then it is in IL2.  Hence the modeling causes the FPS loss just as easily.  You fly into a furball and start lagging, but.... but  all the cons are just little dots....   What graphics do you see?

Flight physics are responsible for a noticeable difference in fps?  How do we know this?  Flight physics should count for far less Cpu power than graphics, which is evident from the fact that reducing visual detail or resolution improves fps.

The lengths to which some of you go to defend HTC is really amusing sometimes. :lol
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Offline moot

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Re: Contrails
« Reply #32 on: May 20, 2009, 09:27:40 AM »
The graphics engine in Il2 would be superior (as it seems to be) in a bang/buck metric simply because more cash was thrown at it.  I'm not sure Il2 is that much less intensive overall.. It has all those weird bootstrapped FM bits and pieces and a lot more DM going on.  I could be wrong on this one though.
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Offline Anaxogoras

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Re: Contrails
« Reply #33 on: May 20, 2009, 10:57:19 AM »
What about the fact that Il-2 doesn't have real trees?  That AH tries to be a suitable world for ground vehicles has to hit fps more than the 2d trees of Il-2.
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Offline AWwrgwy

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Re: Contrails
« Reply #34 on: May 20, 2009, 11:02:37 AM »
Has nothing to do with alt.  Humidity and temp on the other hand, air density & pressure...... Altitude is only a factor by changing the measurements of the former factors.


Quote
A contrail will form behind a jet if, as exhaust gases cool and mix with surrounding air, the humidity is high enough and the temperature low enough for liquid water to condense. The air needs to be supersaturated and the temperature generally below -40°F, something that typically occurs only in the upper troposphere, the atmospheric layer several miles up where airliners cruise.
Quote

Low level contrails in Siberia I suppose.  I guess I should be more specific.  After all, where does one find -40o air generally?


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Offline LLogann

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Re: Contrails
« Reply #35 on: May 20, 2009, 11:30:12 AM »
Winter happens and planes still fly my brotha!!!   :cool:   Not to mention I think the request is for all forms of vortices, contrails, vapor trails...........  Only contrails behave exactly as you have spoken.  Vapor trails can happen at any altitude and vortices are easy to make..... Anywhere.   And then you have Crow Instability to boot!

Quote
A contrail will form behind a jet if, as exhaust gases cool and mix with surrounding air, the humidity is high enough and the temperature low enough for liquid water to condense. The air needs to be supersaturated and the temperature generally below -40°F, something that typically occurs only in the upper troposphere, the atmospheric layer several miles up where airliners cruise.
Quote

Low level contrails in Siberia I suppose.  I guess I should be more specific.  After all, where does one find -40o air generally?


wrongway
« Last Edit: May 20, 2009, 12:35:59 PM by LLogann »
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Offline AWwrgwy

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Re: Contrails
« Reply #36 on: May 20, 2009, 01:06:37 PM »
Winter happens and planes still fly my brotha!!!   :cool:   Not to mention I think the request is for all forms of vortices, contrails, vapor trails...........  Only contrails behave exactly as you have spoken.  Vapor trails can happen at any altitude and vortices are easy to make..... Anywhere.   And then you have Crow Instability to boot!


Which is why I asked a few posts back whether it was contrails or vapor trails/vortices being asked for.  Two different things IMO.

-40o in winter below 20,000 feet where?  Often?  Don't want to go there.

I would surmise that the whole "contrail" wish was a request to be able to spot high level flights from the ground anyway, which would be pointless as regarding the view range in game anyway.

Otherwise, eye candy?


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Offline LLogann

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Re: Contrails
« Reply #37 on: May 20, 2009, 01:17:32 PM »
AHHHHHHHHH.... You are so right sir, you did say that.  Apologies!    :salute

Which is why I asked a few posts back whether it was contrails or vapor trails/vortices being asked for.  Two different things IMO.
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Offline hitech

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Re: Contrails
« Reply #38 on: May 20, 2009, 01:28:22 PM »
Quote
means losing the people that cant put a hundred dollars in to their computer every year to keep up with everyone else.

Been there done that and I have the T-shirt.

Making this mistake almost put HTC out of business, I will not be making that mistake again.

2nd you do not quite seem to understand the difference in scale we are talking about.

With bullet trails and leaks, how long does the trail stay around, 1 - 2 secs?

HiTech


Offline moot

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Re: Contrails
« Reply #39 on: May 20, 2009, 01:35:17 PM »
HT, would it really be that expensive if they were kept to the highest altitudes, and had a large LoD range?
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Offline BnZs

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Re: Contrails
« Reply #40 on: May 20, 2009, 01:57:52 PM »
Flight physics are responsible for a noticeable difference in fps?  How do we know this?  Flight physics should count for far less Cpu power than graphics, which is evident from the fact that reducing visual detail or resolution improves fps.

Anax: I fool around with a non-combat flight sim called X-Plane. In the "Plane-Maker" module, you can set the number of elements along the wings and stabs for which lift and drag are measured. Simply increasing the numbers of points being measured for flight modeling purposes from say 4 to 10 on all lift surfaces for a given craft can cause a notable slow down in frame rates when flying that craft.

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Offline Larry

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Re: Contrails
« Reply #41 on: May 20, 2009, 02:18:44 PM »

With bullet trails and leaks, how long does the trail stay around, 1 - 2 secs?

HiTech




Yep and when Im in a bomber and have five or six fuel/oil leaks I dont see ANY FR hits. Thats pretty good seeing that I only spent $475 on this computer a few years ago. How much would it hurt if the contrails lasted 6-8-10 secs?
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Offline Anaxogoras

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Re: Contrails
« Reply #42 on: May 20, 2009, 04:38:49 PM »
Anax: I fool around with a non-combat flight sim called X-Plane. In the "Plane-Maker" module, you can set the number of elements along the wings and stabs for which lift and drag are measured. Simply increasing the numbers of points being measured for flight modeling purposes from say 4 to 10 on all lift surfaces for a given craft can cause a notable slow down in frame rates when flying that craft.

Very interesting!  Thank you for the edification.  I suppose it's probable that the fm is responsible for the difference, though the trees of AH are a real fps killer.
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Offline LLogann

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Re: Contrails
« Reply #43 on: May 20, 2009, 06:47:47 PM »
I still Love you man!!!   <S>

Very interesting!  Thank you for the edification.  I suppose it's probable that the fm is responsible for the difference, though the trees of AH are a real fps killer.
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Offline Flipperk

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Re: Contrails
« Reply #44 on: May 21, 2009, 06:24:13 AM »
I agree, the contrails dont have to last for thousands of feet, 5-8 seconds would be just fine. And if your computer cant handle that, then it must be a POS to begin with that could barely run AHII. Hell the new planes have more graphic weight than the contrail will.
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