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View Full Version : Will the Doppler Effect be implemented?



XyZspineZyX
11-10-2003, 06:07 AM
At the moment when I press the f2 key and move out to the machine guns maximum distance of travel from my aircraft and hold the fire key, I see the muzzle flash of the machine guns and hear them at the same time. Then a few seconds later the bullets rush past making a whistling sound (which sounds really awesome btw). However due to the doppler effect of sound I should see the bullets travel past and hear them going past before I hear the machine gun fire? If this can be implimented without too much effort it would make the sound effects so much more realistic. /i/smilies/16x16_smiley-happy.gif

XyZspineZyX
11-10-2003, 06:07 AM
At the moment when I press the f2 key and move out to the machine guns maximum distance of travel from my aircraft and hold the fire key, I see the muzzle flash of the machine guns and hear them at the same time. Then a few seconds later the bullets rush past making a whistling sound (which sounds really awesome btw). However due to the doppler effect of sound I should see the bullets travel past and hear them going past before I hear the machine gun fire? If this can be implimented without too much effort it would make the sound effects so much more realistic. /i/smilies/16x16_smiley-happy.gif

XyZspineZyX
11-10-2003, 06:41 AM
Doppler effect is the change in pitch due to an object compressing/stretching the soundwave due to it approaching/retreating from an observer. That's aleady in and is quite cool.

What you're asking for is the simulation of the speed of sound to be factored into the audio model. That's a whole different kettle of fish and involves quite a bit of soundcard driver/CPU/game-engine shinnanigans.

It's tied into the same issue as hearing really LOUD ship artillery 20km away. So as a broader issue, it's a known problem.

<center>
Read the <a href=http://www.mudmovers.com/sturmovik_101/FAQ.htm>IL2 FAQ</a>
Got Nimrod? Try the unofficial <A HREF=http://acompletewasteofspace.com/forum/viewforum.php?f=4&sid=4870c2bc08acb0f130e5e3396d08d595>OT forum</A>

XyZspineZyX
11-10-2003, 06:47 AM
-- I see the muzzle flash....

I do Believe!


Hobs is right, that little problem is speed of sound effect, not doppler effect.

---------------------|

Combat reports have documented that for realistic modelling.....

(1) When P~51 chases Bf109, the P~51 skin should turn blue as seen by the 109 simmer.

(2) When Me262 chases P~51, the Me262s simmer should see the P~51 skin as red.

(3) When the P~51 dives, the P~51 simmer should see the cockpit clock run backwards.

Oleg I hope you can get a Special Relativity expert to test the P~51 before final releace and "fix" the doppler effect for P~51. Thanks! /i/smilies/16x16_smiley-happy.gif

XyZspineZyX
11-10-2003, 07:42 AM
I used to get the "whistling" of the rounds as they passed by at range, but now I do not. I still here the report of the guns, see the tracers, but no "whistling." Why is that I wonder...

XyZspineZyX
11-10-2003, 12:19 PM
LMAO /i/smilies/16x16_smiley-happy.gif I might as well have said "Red-Shift", I'm a bloody idiot haha. Yep the speed of sound was what I was talking about, Now looking for a deep dark corner to laugh my guts out into. /i/smilies/16x16_smiley-happy.gif /i/smilies/16x16_smiley-sad.gif /i/smilies/16x16_smiley-happy.gif /i/smilies/16x16_smiley-sad.gif /i/smilies/16x16_smiley-happy.gif /i/smilies/16x16_smiley-sad.gif

================================================== =========

hobnail wrote:
- Doppler effect is the change in pitch due to an
- object compressing/stretching the soundwave due to
- it approaching/retreating from an observer. That's
- aleady in and is quite cool.
-
- What you're asking for is the simulation of the
- speed of sound to be factored into the audio model.
- That's a whole different kettle of fish and involves
- quite a bit of soundcard driver/CPU/game-engine
- shinnanigans.
-
- It's tied into the same issue as hearing really LOUD
- ship artillery 20km away. So as a broader issue,
- it's a known problem.
-
- <center>[/url]
- Read the [url="http://www.mudmovers.com/sturmovik_101/FAQ.ht
-"]IL2 FAQ (http://www.JG11.com/><img)
- Got Nimrod? Try the unofficial <A
- HREF=http://acompletewasteofspace.com/forum/viewfo
- rum.php?f=4&sid=4870c2bc08acb0f130e5e3396d08d595>OT
- forum</A>
-





Message Edited on 11/10/0311:22AM by E_Temperament

XyZspineZyX
11-10-2003, 12:21 PM
It is in a sim. And is done better than anybody else... /i/smilies/16x16_robot-happy.gif
It is done for any sound effect in a sound engine.


E_Temperament wrote:
- At the moment when I press the f2 key and move out
- to the machine guns maximum distance of travel from
- my aircraft and hold the fire key, I see the muzzle
- flash of the machine guns and hear them at the same
- time. Then a few seconds later the bullets rush past
- making a whistling sound (which sounds really
- awesome btw). However due to the doppler effect of
- sound I should see the bullets travel past and hear
- them going past before I hear the machine gun fire?
- If this can be implimented without too much effort
- it would make the sound effects so much more
- realistic. /i/smilies/16x16_smiley-happy.gif
-
-



Oleg Maddox
1C:Maddox Games

XyZspineZyX
11-10-2003, 01:44 PM
LEXX_Luthor wrote:
-
- (3) When the P~51 dives, the P~51 simmer should see
- the cockpit clock run backwards.


LOL /i/smilies/16x16_smiley-very-happy.gif

rgds