double RefEdge::fraction_from_arc_length(RefVertex *root_vertex,
double length)
{
if (root_vertex != start_vertex() && root_vertex != end_vertex())
return -1.0;
if (geometry_type() == POINT_CURVE_TYPE || get_arc_length() < GEOMETRY_RESABS)
return 0.0;
if (length >= get_arc_length())
return 1.0;
if (root_vertex == start_vertex())
return length/get_arc_length();
else
return 1-length/get_arc_length();
}
geometry_generator_grammar<OutputIterator, Geometry>::geometry_generator_grammar()
: geometry_generator_grammar::base_type(geometry)
{
boost::spirit::karma::_val_type _val;
boost::spirit::karma::_1_type _1;
boost::spirit::karma::_a_type _a;
boost::spirit::karma::lit_type lit;
boost::spirit::karma::uint_type uint_;
boost::spirit::karma::eps_type eps;
geometry = geometry_dispatch.alias()
;
geometry_dispatch = eps[_a = geometry_type(_val)] <<
(&uint_(geometry::geometry_types::Point)[_1 = _a]
<< (point | lit("null")))
|
(&uint_(geometry::geometry_types::LineString)[_1 = _a]
<< (linestring | lit("null")))
|
(&uint_(geometry::geometry_types::Polygon)[_1 = _a]
<< (polygon | lit("null")))
|
(&uint_(geometry::geometry_types::MultiPoint)[_1 = _a]
<< (multi_point | lit("null")))
|
(&uint_(geometry::geometry_types::MultiLineString)[_1 = _a]
<< (multi_linestring | lit("null")))
|
(&uint_(geometry::geometry_types::MultiPolygon)[_1 = _a]
<< (multi_polygon | lit("null")))
|
(&uint_(geometry::geometry_types::GeometryCollection)[_1 = _a]
<< (geometry_collection | lit("null")))
|
lit("null")
;
point = lit("{\"type\":\"Point\",\"coordinates\":") << point_coord << lit("}")
;
linestring = lit("{\"type\":\"LineString\",\"coordinates\":[") << linestring_coord << lit("]}")
;
polygon = lit("{\"type\":\"Polygon\",\"coordinates\":[") << polygon_coord << lit("]}")
;
multi_point = lit("{\"type\":\"MultiPoint\",\"coordinates\":[") << multi_point_coord << lit("]}")
;
multi_linestring = lit("{\"type\":\"MultiLineString\",\"coordinates\":[") << multi_linestring_coord << lit("]}")
;
multi_polygon = lit("{\"type\":\"MultiPolygon\",\"coordinates\":[") << multi_polygon_coord << lit("]}")
;
geometry_collection = lit("{\"type\":\"GeometryCollection\",\"geometries\":[") << geometries << lit("]}")
;
point_coord = lit('[') << coordinate << lit(',') << coordinate << lit(']')
;
linestring_coord = point_coord % lit(',')
;
polygon_coord = lit('[') << exterior_ring_coord << lit(']') << interior_ring_coord
;
exterior_ring_coord = linestring_coord.alias()
;
interior_ring_coord = *(lit(",[") << exterior_ring_coord << lit(']'))
;
multi_point_coord = linestring_coord.alias()
;
multi_linestring_coord = (lit('[') << linestring_coord << lit(']')) % lit(',')
;
multi_polygon_coord = (lit('[') << polygon_coord << lit(']')) % lit(',')
;
geometries = geometry % lit(',')
;
}