//================================
// OvrSurfaceAnimComponent::SetFrameVisibilities
void OvrSurfaceAnimComponent::SetFrameVisibilities( App * app, VrFrame const & vrFrame, OvrVRMenuMgr & menuMgr, VRMenuObject * self ) const
{
int minIndex = GetCurFrame() * SurfacesPerFrame;
int maxIndex = ( GetCurFrame() + 1 ) * SurfacesPerFrame;
for ( int i = 0; i < self->NumSurfaces(); ++i )
{
self->SetSurfaceVisible( i, i >= minIndex && i < maxIndex );
}
}
float OvrTrailsAnimComponent::GetAlphaForFrame( const int frame ) const
{
const int currentFrame = GetCurFrame( );
if ( frame == currentFrame )
return 1.0f;
const float alpha = GetFractionalFrame( );
const float aheadFactor = 1.0f / FramesAhead;
for ( int ahead = 1; ahead <= FramesAhead; ++ahead )
{
if ( frame == ( currentFrame + ahead ) )
{
return ( alpha * aheadFactor ) + ( aheadFactor * ( FramesAhead - ahead ) );
}
}
const float invAlpha = 1.0f - alpha;
const float behindFactor = 1.0f / FramesBehind;
for ( int behind = 1; behind < FramesBehind; ++behind )
{
if ( frame == ( currentFrame - behind ) )
{
return ( invAlpha * behindFactor ) + ( behindFactor * ( FramesBehind - behind ) );
}
}
return 0.0f;
}
CImage* sysuVideo::YUVReader::GetNextFrame()
{
if (!HasNextFrame() || !isStreamOpen)
throw EXCEPTION_ACCESS_VIOLATION;
constructFrame();
++curFrameCnt;
return GetCurFrame();
}
float sqr_tools::CFrameScaleCtrlImp::GetUpdateFrame( void )
{
if (IsPlay())
{
if (MODEL)
{
int num = MODEL->GetAnimateMaxFrameNum();
if ( num == 0 )
return GetCurFrame();
else
return ((CEditModel*)MODEL)->GetCurFrame();
}
else
return 0.0f;
}
else
{
return GetCurFrame();
}
}
CImage* sysuVideo::YUVReader::GetNthFrame(unsigned long frmNum)
{
if (!HasNthFrame(frmNum) || !isStreamOpen)
throw EXCEPTION_ACCESS_VIOLATION;
fseek(videoStream, frmNum * (YCount + UCount + VCount), SEEK_SET);
constructFrame();
curFrameCnt = frmNum;
return GetCurFrame();
}
CImage* sysuVideo::YUVReader::GetPreFrame()
{
if (!HasPreFrame() || !isStreamOpen)
throw EXCEPTION_ACCESS_VIOLATION;
fseek(videoStream, -2 * (YCount + UCount + VCount), SEEK_CUR);
constructFrame();
--curFrameCnt;
return GetCurFrame();
}
void OvrTrailsAnimComponent::SetFrameVisibilities( App * app, VrFrame const & vrFrame, OvrVRMenuMgr & menuMgr, VRMenuObject * self ) const
{
// LOG( "FracFrame: %f", GetFractionalFrame() );
const int currentFrame = GetCurFrame();
for ( int i = 0; i < self->NumChildren(); ++i )
{
menuHandle_t childHandle = self->GetChildHandleForIndex( i );
if ( VRMenuObject * childObject = menuMgr.ToObject( childHandle ) )
{
Vector4f color = childObject->GetColor();
color.w = GetAlphaForFrame( i );
childObject->SetColor( color );
}
}
}
