Maybe deriving from QwtRasterData makes more sense than using QwtMatrixRasterData in your situation.
But if you want to use QwtMatrixRasterData you can simply:
YourRasterData: public QwtMatrixRasterData
{
public:
....
virtual double value( double x, double y ) const
{
return QwtMatrixRasterData::value( y, x );
}
};
YourRasterData: public QwtMatrixRasterData
{
public:
....
virtual double value( double x, double y ) const
{
return QwtMatrixRasterData::value( y, x );
}
};
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Uwe
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