?/TD>
Microsoft DirectX 9.0

DIENVELOPE Structure


Used by the DIEFFECT structure to specify the optional envelope parameters for an effect. The sustain level for the envelope is represented by the dwMagnitude member of the DIPERIODIC structure and the lMagnitude member of the DICONSTANTFORCE structure. The sustain time is represented by dwDuration member of the DIEFFECT structure.

Syntax

typedef struct DIENVELOPE { 
    DWORD dwSize; 
    DWORD dwAttackLevel; 
    DWORD dwAttackTime; 
    DWORD dwFadeLevel; 
    DWORD dwFadeTime; 
} DIENVELOPE, *LPDIENVELOPE; 
 
typedef const DIENVELOPE *LPCDIENVELOPE;

Members

dwSize
Size, in bytes, of the structure. This member must be initialized before the structure is used.
dwAttackLevel
Amplitude for the start of the envelope, relative to the baseline, in the range from 0 through 10,000. If the effect's type-specific data does not specify a baseline, the amplitude is relative to 0.
dwAttackTime
The time, in microseconds, to reach the sustain level.
dwFadeLevel
Amplitude for the end of the envelope, relative to the baseline, in the range from 0 through 10,000. If the effect's type-specific data does not specify a baseline, the amplitude is relative to 0.
dwFadeTime
The time, in microseconds, to reach the fade level.

Structure Information

Headerdinput.h
Minimum operating systems Windows 98


© 2002 Microsoft Corporation. All rights reserved.