Microsoft DirectX 8.1 (C++)

IDirectSound3DListener8::SetDistanceFactor

The SetDistanceFactor method sets the distance factor, which is the number of meters in a vector unit.

Syntax

HRESULT SetDistanceFactor(
  D3DVALUE flDistanceFactor, 
  DWORD dwApply 
);

Parameters

flDistanceFactor

Value that specifies the distance factor. D3DVALUE is defined as float in D3dtypes.h.

dwApply

Value that specifies when the setting should be applied. This value must be one of the following:

Value Description
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.

Return Values

If the method succeeds, the return value is DS_OK.

If the method fails, the return value may be DSERR_INVALIDPARAM.

Remarks

The distance factor has a range of DS3D_MINDISTANCEFACTOR to DS3D_MAXDISTANCEFACTOR, defined in Dsound.h as FLT_MIN and FLT_MAX respectively. The default value is DS3D_DEFAULTDISTANCEFACTOR, or 1.0.

Requirements

  Header: Declared in dsound.h.

See Also