IDirectMusicComposer::ComposeTransition

The IDirectMusicComposer::ComposeTransition method composes a transition from a measure inside one segment to another.

HRESULT ComposeTransition(
  IDirectMusicSegment* pFromSeg, 
  IDirectMusicSegment* pToSeg, 
  MUSIC_TIME mtTime, 
  WORD wCommand, 
  DWORD dwFlags, 
  IDirectMusicChordMap* pChordMap, 
  IDirectMusicSegment** ppTransSeg
);

Parameters

pFromSeg

Segment from which to compose the transition.

pToSeg

Segment to which the transition should smoothly flow. Can be NULL if dwFlags does not include DMUS_COMPOSEF_MODULATE.

mtTime

Time in pFromSeg from which to compose the transition.

wCommand

Embellishment to use when composing the transition. See DMUS_COMMANDT_TYPES. If this value is DMUS_COMMANDT_ENDANDINTRO, the method composes a segment containing both an ending to pFromSeg and an introduction to pToSeg.

dwFlags

Composition options. This parameter can contain one or more of the DMUS_COMPOSEF_FLAGS enumerated type values.

pChordMap

Chord map to be used when composing the transition. See Remarks.

ppTransSeg

Address of a variable to receive a pointer to the created segment.

Return Values

If the method succeeds, the return value is S_OK.

If it fails, the method can return one of the following error values:

Remarks

The value in pChordMap can be NULL. If it is, an attempt is made to obtain a chord map from a chord-map track, first from pToSeg, and then from pFromSeg. If neither of these segments contains a chord-map track, the chord occurring at mtTime in pFromSeg is used as the chord in the transition.

The composer looks for a tempo, first in pFromSeg, and then in pToSeg. If neither of those segments contains a tempo track, the tempo for the transition segment is taken from the style.

Requirements

  Windows NT/2000: Requires Windows 2000.
  Windows 95/98: Requires Windows 95 or later. Available as a redistributable for Windows 95.
  Header: Declared in dmusici.h.

See Also

IDirectMusicComposer::AutoTransition, Using Transitions