Re: position

Hello all, how do I code OpenAL in Visual Basic NET?

Please ... no silenet treatement, i have been getting too much of htat from
here

On Thu, Oct 13, 2011 at 7:24 PM, Christina Fuentes <
[email protected]> wrote:

> Hi,
>
> I'm trying to use OpenAL to create 3D sound clips where the source is at
> different distances from the listener. Here are my settings for the
> listener:
> % Static listener, facing forward
> forward = [0,0,1];
> up = [0,1,0];
> orient = [forward, up];
> alListenerfv(AL.ORIENTATION, orient);
> alListenerfv(AL.POSITION, [0, 0, -1])
> alListenerfv(AL.VELOCITY, [0, 0, 0]);
>
> What I want to vary is the position of the source. I'm trying to use
> alSource3f(source, AL.POSITION, x, y, z)
> but I can't figure out the coordinate system. More specifically, I found in
> the OpenAL specifications that it uses a right-handed Cartesian system,
> where in a frontal view X (thumb) points right, Y (index finger) points up,
> and Z (middle finger) points towards the listener. What I can't sort out is
> where the origin is and what the units are. With the above settings for the
> listener, if I set the source's Y position as 0 and the X position as 0,
> increasing the Z position decreases the sound's intensity, which is good
> (the source is moving farther away). Is there any reference to how far it's
> moving (i.e., if Z is 1 versus 3, does this equate to any distance units or
> is the absolute perception of distance just relative for each listener)?
> Moreover, if I keep Z at 1 and try adjusting X, which should move the sound
> from the left to the right, I can't hear much of any difference, and if I
> try to adjust both X and Z all bets are off.
>
> I'm feeling a bit lost and I think some simple specifications would sort
> everything out, I just can't find them anywhere online. Any help would be
> greatly appreciated.
>
> Best,
> Christina
>
>
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