[Openal] ConvertReverbParamaters() from EFX-Util

[Daniel PEACOCK]

Hi Christopher,

The ConvertReverbParameters function does convert EAX Environment Size into
EFX Reverb Density.

In EAX, the Environment Size property is a little unusual.   If you set an
entire Reverb preset (e.g. do a Set DSPROPERTY_EAXLISTENER_ALLPARAMETERS
call) then the EnvironmentSize property is used to control modal density in
the reverb engine.   Because you are setting all the other reverb
parameters at the same time it does not make sense for them to be altered
further by the Environment Size property.   The value you have set for
Environment Size is stored because it will make a difference if you later
modify it's value.

When you make a call to change *just* the Environment Size property
(DSPROPERTY_EAXLISTENER_ENVIRONMENTSIZE) then this will change other reverb
parameters based on the flags you have set.   The exact formulas used are
not available I'm afraid.

I presume that you are asking because you are using the EFX extension and
you would like the ability to dynamically change the room size?

Dan
Creative Labs (UK) Ltd.

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             Christopher                                                   
             Fitzgerald                                                    
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Greetings,

Just out of curiosity, when using EFX-Util.lib's ConvertReverbParameters()
function, I've found that the flEnvironmentSize only seems to effect the
EFX density parameter, regardless of the scaling flags used (so contrary to
the EAX 2 specification).  Is this the desired behavior?  Or am I missing
something?

If the function doesn't take the scaling flags into account, is there any
documentation that lays out how to apply the scaling myself?

Regards,
 - Christopher
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