func osmRelationToTrainLine(osm *osm.Osm, index *osm.Index, relation osm.Relation) (trainLine model.TrainLine) {
var sections model.Sections
for _, member := range relation.WayMembers() {
way := index.WayById(member.Ref)
if way != nil {
sections = append(sections, wayToSection(osm, index, *way))
}
}
trainLine.Sections = sections
return trainLine
}
func wayToSection(osm *osm.Osm, index *osm.Index, way osm.Way) (section model.Section) {
var points model.Points
for _, nd := range way.Nd {
node := index.NodeById(nd.Ref)
if node != nil {
point := model.Point{X: node.Lon, Y: node.Lat}
points = append(points, point)
}
}
//TODO extract stations info from way.Nds
section.Points = points
return section
}