void Particle::update(float timeElapsed) {
setTimeElapsed(timeElapsed);
interpolateLifeTime();
interpolateSize();
interpolateColor();
calculatePhysics();
}
int QgsDiagramRenderer::calculateDiagramSize( const QgsFeature& f, int& size ) const
{
//find out value for classificationAttribute
QVariant value;
if ( classificationValue( f, value ) != 0 )
{
return 1;
}
if ( mItemInterpretation == ATTRIBUTE )
{
size = ( int )( value.toDouble() * mScaleFactor );
return 0;
}
if ( mItems.size() < 1 )
{
return 2;
}
if ( mItemInterpretation == CONSTANT )
{
size = ( int )( mItems.constBegin()->size * mScaleFactor );
return 0;
}
//find out size
bool sizeAssigned = false;
QList<QgsDiagramItem>::const_iterator current_it = mItems.constBegin();
QList<QgsDiagramItem>::const_iterator last_it = mItems.constEnd();
if ( value.type() == QVariant::String ) //string types are handled differently
{
for ( ; current_it != mItems.constEnd(); ++current_it )
{
if ( current_it->value.toString() == value.toString() )
{
size = ( int )( current_it->size * mScaleFactor );
sizeAssigned = true;
}
}
if ( !sizeAssigned )
{
return 3;
}
}
else //numerical types
{
for ( ; current_it != mItems.constEnd(); ++current_it )
{
if ( value.toDouble() < current_it->value.toDouble() )
{
if ( last_it == mItems.constEnd() ) //values below classifications receive first items size
{
size = ( int )( current_it->size * mScaleFactor );
}
else
{
size = ( int )( interpolateSize( value.toDouble(), last_it->value.toDouble(), current_it->value.toDouble(), last_it->size, current_it->size ) * mScaleFactor );
}
sizeAssigned = true;
break;
}
last_it = current_it;
}
if ( !sizeAssigned )//values above classification receive last items size
{
size = ( int )( last_it->size * mScaleFactor );
}
}
return 0;
}
