Hi Thomas,

Yes, the bulk of the implementation is very close to your example. It was the only way I could think of to get a good compromize between a realistic sound image and a well performing application. I assume you already use some sort of pathfinding for your AI? I have an optimized AStar implementation with some extra features and tweaks that I use on this end.

Kind regards,

Philip Bennefall
----- Original Message ----- From: "Thomas Ward" <thomasward1...@gmail.com>
To: <phi...@blastbay.com>; "Gamers Discussion list" <gamers@audyssey.org>
Sent: Monday, December 06, 2010 8:57 PM
Subject: Re: [Audyssey] Creating game levels to scale?

Hi Philip,

Ouch! Basically, what you are telling me is instead of picking any
single method to handle sounds you have decided to implement all three
of the methods in order to insure a realistic environment. Sounds
reasonable, but it also sounds like a lot of work. As I sit here
typing this message I'm trying to think of how that would look like in
code. Perhaps something like this?

   // Get the player and object location
   x1 = player.GetX();
   y1 = player.GetY();
   z1 = player.GetZ();
   x2 = object.GetX();
   y2 = object.GetY();
   z2 = object.GetZ();

   // Get the region and distance
   region = player.GetRegion();
   distance = GetDistance (x1, y1, z1, x2, y2, z2);
   open = GetDoor (region);

   // Play or update sounds
   if ((distance <= 25 &&
     open == true) ||
     (region == object.GetRegion()))
           // Start/update sounds

   // Stop the sounds
   if (distance >= 25 &&
     open == false &&
     region != object.GetRegion())
           // Stop sounds

I'm not sure I got this right, but I think that is a rough idea how
you would go about checking distance, pathways, and region all in one
place without driving yourself crazy. If so it doesn't look too bad.
I'd be interested in seeing your method for handling this thorny


On 12/6/10, Philip Bennefall <phi...@blastbay.com> wrote:
Hi Thomas,

This exact problem struck me also when I started developing my current 2d
game. The way I'm solving it is to have the distance calculations that stop
sounds, but also to divide things into regions as you say. Then, I use
pathfinding to see if there is an audible path between the player's current
region and region x. If there is, play the sound based off of that source
such as a doorway, or all over the stereo image if you find that there are
plenty of open space between the two such as a large coridor leading into
another. Pathfinding is obviously quite expensive so you will need to buffer
and reuse rather than recalculate except when absolutely necessary, but I
think you get the idea. I do not know whether you consider this to be too
much of a time investment, but that's the approach that I'm going with in
order to get both nice overlapping and efficient CPU usage.

Kind regards,

Philip Bennefall

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