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The problem is in idSoundWorldLocal::ResolveOrigin, a recursive function that flows sound through portals and (1) tots up the volume contribution of different paths to the player, and (2) calculates the spatialized origin, the apparent origin of the sound, heard from the listener's position. It needs an extra terminating condition up top: if the accumulated sound loss through a portal path is greater than the emitter volume, quit instead of returning a set of numbers that will resolve to 0 volume. The problem arises later in the same function when it merges together results from different portal chains. If there's more than one chain whose length is within the sound's max distance, but *all* chains found resolve to 0 volume because of sound loss on the portals, then we get a division by zero in the spatialized origin calculation, which eventually ends up being fed into to the sound card as a channel volume. |
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At rev 6494 /trunk/sound/snd_world.cpp |
- Anonymous
