|Microsoft DirectX 9.0|
The SetDopplerFactor method sets the multiplier for the Doppler effect.
HRESULT SetDopplerFactor( D3DVALUE flDopplerFactor, DWORD dwApply );
Doppler factor. D3DVALUE is defined as float.
Value that specifies when the setting should be applied. This value must be one of the following:
|DS3D_DEFERRED||Settings are not applied until the application calls the IDirectSound3DListener8::CommitDeferredSettings method. This allows the application to change several settings and generate a single recalculation.|
|DS3D_IMMEDIATE||Settings are applied immediately, causing the system to recalculate the 3-D coordinates for all 3-D sound buffers.|
If the method succeeds, the return value is DS_OK.
If the method fails, the return value may be DSERR_INVALIDPARAM.
The Doppler factor has a range of DS3D_MINDOPPLERFACTOR (no Doppler effects) to DS3D_MAXDOPPLERFACTOR (defined as 10 times the Doppler effects found in the real world). The default value is DS3D_DEFAULTDOPPLERFACTOR (1.0).
Header: Declared in dsound.h.