FrameData *CObjectModel::getFrameDataFromPrevFrame(QModelIndex index, int frame, bool bRepeat)
{
if ( !isLayer(index) ) { return NULL ; }
ObjectItem *p = getItemFromIndex(index) ;
return getFrameDataFromPrevFrame(p, frame, bRepeat) ;
}
FrameData ObjectItem::getDisplayFrameData(int frame, bool *bValid)
{
FrameData d ;
FrameData *pPrev = getFrameDataFromPrevFrame(frame+1) ;
if ( pPrev ) {
FrameData *pNext = getFrameDataFromNextFrame(frame) ;
d = pPrev->getInterpolation(pNext, frame) ;
d.frame = frame ;
if ( bValid ) { *bValid = true ; }
}
else {
if ( bValid ) { *bValid = false ; }
}
return d ;
}
QPointF ObjectItem::getBezierPos(int frame, bool *pValid)
{
FrameData *pPrev = getFrameDataFromPrevFrame(frame+1) ;
FrameData *pNext = getFrameDataFromNextFrame(frame) ;
QMatrix4x4 m0, m1 ;
QList<QPointF> list ;
bool valid ;
float t ;
if ( !pPrev || !pNext || (!pPrev->path[0].bValid && !pNext->path[1].bValid) ) {
goto __FAILED ;
}
if ( pNext->frame-pPrev->frame == 0 ) {
qDebug() << "Error same frame" ;
goto __FAILED ;
}
m0 = getDisplayMatrix(pPrev->frame, &valid) ;
if ( !valid ) {
goto __FAILED ;
}
if ( frame == pPrev->frame ) {
if ( pValid ) { *pValid = true ; }
return QPointF(m0.column(3).x(), m0.column(3).y()) ;
}
m1 = getDisplayMatrix(pNext->frame, &valid) ;
if ( !valid ) {
goto __FAILED ;
}
if ( frame == pNext->frame ) {
if ( pValid ) { *pValid = true ; }
return QPointF(m0.column(3).x(), m0.column(3).y()) ;
}
list << QPointF(m0.column(3).x(), m0.column(3).y()) ;
list << QPointF(m0.column(3).x() + pPrev->path[0].v.x(), m0.column(3).y() + pPrev->path[0].v.y()) ;
list << QPointF(m1.column(3).x() + pNext->path[1].v.x(), m1.column(3).y() + pNext->path[1].v.y()) ;
list << QPointF(m1.column(3).x(), m1.column(3).y()) ;
t = (frame-pPrev->frame) / (float)(pNext->frame-pPrev->frame) ;
if ( pValid ) { *pValid = true ; }
return util::getBezierPoint(list, t) ;
__FAILED:
if ( pValid ) { *pValid = false ; }
return QPointF(0, 0) ;
}
