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You are reading a General forum message. Re: more about DirectSound Doppler FX , Buffers...and 3D space deferre Author: Israel Luengo Date Posted: 2006-03-24 02:50:17 Well, we have the sound cones....but how we manage it in a virtual 3d space.... - First, when we create a SoundBuffer, we have the following DSBUFFERDESC properties DSBCAPS_CTRL3D - Primary or Secondary buffer that uses the 3D control DSBCAPS_CTRLALL - Buffer that have all the capabilities of control. DSBCAPS_CTRLDEFAULT - Use the predefined optios (this is auto-conf with this values (DSBCAPS_CTRLPAN, DSBCAPS_CTRLVOLUME, DSBCAPS_CTRLFREQUENCY) DSCBCAPS_CTRLFREQUENCY - Capability for frequence control DSCBCAPS_CTRLPAN - Capability for Panning effect (balance) DSCBCAPS_CTRLVOLUME - Capability for volume control (increase and decrease) DSCBCAPS_PRIMARYBUFFER - Enable this option, you can have access to primary buffer, otherwise the buffer created will be secondary. DOPPLER FX (effect) -------------------------- For stablish the Doppler fx, we stablish the property DirectSound3DListener->SetDopplerFactor(D3D_VALUE flDopplerFactor, dword Apply) (a 1.0 value, will use the "normal" doppler effect....) and the other argument is a predefined value, for apply the changes, can be one of this values: DS_DEFERRED and DS_INMEDIATE....first value, wait to call function CommitDeferredSettings located in DirectSound3DListener component and recalculate all the 3D virtual space and sound...the DS_IMMEDIATE value passed, applies the changes inmediately. Usually, we "acumulate" results in change of 3D space sounds, with DS_DEFERRED for a given momment, process all at same time-frame through the DirectSound3DListener->CommitDeferredSettings() function. REPLY TO THIS MESSAGE? Top You can post a reply to this General message using the form below: |
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