QTransform LayerCamera::getViewAtFrame(int frameNumber)
{
if ( keyFrameCount() == 0 )
{
return QTransform();
}
Camera* camera1 = static_cast< Camera* >( getLastKeyFrameAtPosition( frameNumber ) );
int nextFrame = getNextKeyFramePosition( frameNumber );
Camera* camera2 = static_cast< Camera* >( getLastKeyFrameAtPosition( nextFrame ) );
if (camera1 == NULL && camera2 == NULL)
{
return QTransform();
}
else if (camera1 == NULL && camera2 != NULL)
{
return camera2->view;
}
else if (camera2 == NULL && camera1 != NULL)
{
return camera1->view;
}
if ( camera1 == camera2 )
{
return camera1->view;
}
int frame1 = camera1->pos();
int frame2 = camera2->pos();
// linear interpolation
qreal c2 = ( frameNumber - frame1 + 0.0 ) / ( frame2 - frame1 );
qreal c1 = 1.0 - c2;
//qDebug() << ">> -- " << c1 << c2;
auto interpolation = [=]( double f1, double f2 ) -> double
{
return f1 * c1 + f2 * c2;
};
return QTransform( interpolation( camera1->view.m11(), camera2->view.m11() ),
interpolation( camera1->view.m12(), camera2->view.m12() ),
interpolation( camera1->view.m21(), camera2->view.m21() ),
interpolation( camera1->view.m22(), camera2->view.m22() ),
interpolation( camera1->view.dx(), camera2->view.dx() ),
interpolation( camera1->view.dy(), camera2->view.dy() ) );
}
QMatrix LayerCamera::getViewAtFrame(int frameNumber)
{
if ( keyFrameCount() == 0 )
{
return QMatrix();
}
Camera* camera1 = static_cast< Camera* >( getLastKeyFrameAtPosition( frameNumber ) );
int nextFrame = getNextKeyFramePosition( frameNumber );
Camera* camera2 = static_cast< Camera* >( getLastKeyFrameAtPosition( nextFrame ) );
if (camera1 == NULL && camera2 == NULL)
{
return QMatrix();
}
if (camera1 == NULL && camera2 != NULL)
{
return camera2->view;
}
if (camera2 == NULL && camera1 != NULL)
{
return camera1->view;
}
int frame1 = camera1->pos();
int frame2 = camera2->pos();
// linear interpolation
qreal c2 = ( frameNumber - frame1 + 0.0 ) / ( frame2 - frame1 );
qreal c1 = 1.0 - c2;
//qDebug() << ">> -- " << c1 << c2;
return QMatrix( c1*camera1->view.m11() + c2*camera2->view.m11(),
c1*camera1->view.m12() + c2*camera2->view.m12(),
c1*camera1->view.m21() + c2*camera2->view.m21(),
c1*camera1->view.m22() + c2*camera2->view.m22(),
c1*camera1->view.dx() + c2*camera2->view.dx(),
c1*camera1->view.dy() + c2*camera2->view.dy() );
}
Camera* LayerCamera::getLastCameraAtFrame(int frameNumber, int increment)
{
return static_cast< Camera* >( getLastKeyFrameAtPosition( frameNumber + increment ) );
}
VectorImage* LayerVector::getLastVectorImageAtFrame( int frameNumber, int increment )
{
return static_cast< VectorImage* >( getLastKeyFrameAtPosition( frameNumber + increment ) );
}
