SeExprAlgorithm.hpp

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#ifndef _TUTTLE_PLUGIN_SEEXPR_ALGORITHM_HPP_
#define _TUTTLE_PLUGIN_SEEXPR_ALGORITHM_HPP_

namespace tuttle {
namespace plugin {
namespace seExpr {

class ImageSynthExpr : public SeExpression
{
public:
        //! Constructor that takes the expression to parse
        ImageSynthExpr( const std::string& expr )
                :SeExpression( expr )
        {}

        //! Simple variable that just returns its internal value
        struct Var:public SeExprScalarVarRef
        {
                Var( const double val )
                        :val(val)
                {}

                Var(){}

                double val; // independent variable
                void eval( const SeExprVarNode* /*node*/,SeVec3d& result )
                { result[0] = val; }
        };

        //! variable map
        mutable std::map<std::string,Var> vars;

        //! resolve function that only supports one external variable 'x'
        SeExprVarRef* resolveVar( const std::string& name ) const
        {
                std::map< std::string, Var >::iterator i = vars.find( name );

                if( i != vars.end() )
                        return &i->second;

                return 0;
        }
};

}
}
}

#endif