Function getOSLEndPointDuplication

src/IECore/Ramp.cpp:217–243

}

std::pair< size_t, size_t > getOSLEndPointDuplication( IECore::RampInterpolation interpolation )
{
	if( interpolation == IECore::RampInterpolation::CatmullRom )
	{
        return std::make_pair( 1, 1 );
	}
	else if( interpolation == IECore::RampInterpolation::BSpline )
	{
        return std::make_pair( 2, 2 );
	}
    else if( interpolation == IECore::RampInterpolation::Linear )
    {
        // OSL discards the first and last segment of linear curves
        // "To maintain consistency with the other spline types"
        // so we need to duplicate the end points to preserve all provided segments
        return std::make_pair( 1, 1 );
    }
    else if( interpolation == IECore::RampInterpolation::Constant )
    {
        // Also, "To maintain consistency", "constant splines ignore the first and the two last
        // data values."
        return std::make_pair( 1, 2 );
    }


    return std::make_pair( 0, 0 );
}

// Removes start and end points with duplicated X values.
//