Method fromOSL

src/IECore/Ramp.cpp:341–398

template<typename X, typename Y>
void Ramp<X,Y>::fromOSL( const std::string &basis, const std::vector<X> &positions, const std::vector<Y> &values, const std::string &identifier )
{
	points.clear();
	size_t n = std::min( positions.size(), values.size() );

	if( basis == "bezier" )
	{
		for( size_t i = 0; i < n; i += 3 )
		{
			points.insert( Point( positions[i], values[i] ) );
		}

        interpolation = RampInterpolation::MonotoneCubic;

		std::vector<X> testPositions;
		std::vector<Y> testValues;
		std::string testBasis;
		toOSL( testBasis, testPositions, testValues );
		if( !( testPositions == positions && testValues == values ) )
		{
			IECore::msg( IECore::MessageHandler::Warning, "Ramp", "While loading shader parameter " + identifier + " found bezier curve that cannot be represented in Gaffer. Using most similar MonotoneCubic curve instead." );
		}
		return;
	}
	else
	{
		for( size_t i = 0; i < n; ++i )
		{
			points.insert( Point( positions[i], values[i] ) );
		}
	}

    if( basis == "bspline" )
    {
        interpolation = RampInterpolation::BSpline;
    }
    else if( basis == "linear" )
    {
        interpolation = RampInterpolation::Linear;
    }
    else if( basis == "constant" )
    {
        interpolation = RampInterpolation::Constant;
    }
	else if( basis == "monotonecubic" )
	{
		// 3delight actually supports monotonecubic, so it's possible we could see an input
		// directly using this interpolation.
		interpolation = RampInterpolation::MonotoneCubic;
	}
    else
    {
        interpolation = RampInterpolation::CatmullRom;
    }

	trimEndPoints( points );

}