- case ValueBase::TYPE_ANGLE: return (*value_)(t).get( Angle()) + (*height_)(t).get( Angle())*step;
- case ValueBase::TYPE_COLOR: return (*value_)(t).get( Color()) + (*height_)(t).get( Color())*step;
- case ValueBase::TYPE_INTEGER: return (*value_)(t).get( int()) + (*height_)(t).get( int())*step;
- case ValueBase::TYPE_REAL: return (*value_)(t).get( Real()) + (*height_)(t).get( Real())*step;
- case ValueBase::TYPE_TIME: return (*value_)(t).get( Time()) + (*height_)(t).get( Time())*step;
- case ValueBase::TYPE_VECTOR: return (*value_)(t).get(Vector()) + (*height_)(t).get(Vector())*step;
+ case ValueBase::TYPE_ANGLE: return (*link_)(t).get( Angle());
+ case ValueBase::TYPE_COLOR: return (*link_)(t).get( Color());
+ case ValueBase::TYPE_INTEGER: return (*link_)(t).get( int());
+ case ValueBase::TYPE_REAL: return (*link_)(t).get( Real());
+ case ValueBase::TYPE_TIME: return (*link_)(t).get( Time());
+ case ValueBase::TYPE_VECTOR: return (*link_)(t).get(Vector());