def _options_roads_neq( roadnet, road1, road2, length_attr ) :
edge1, data1 = ROAD.obtain_edge( roadnet, road1, data_flag=True )
u1,v1,_ = edge1 ; roadlen1 = data1.get( length_attr, np.inf )
edge2, data2 = ROAD.obtain_edge( roadnet, road2, data_flag=True )
u2,v2,_ = edge2 ; roadlen2 = data2.get( length_attr, np.inf )
x = GLOBAL.x ; y = GLOBAL.y
cost_dict = {
'<-s' : x,
's->' : roadlen1 - x,
'->t' : y,
't<-' : roadlen2 - y
}
options = []
# paths through endpoints
WAYP1 = [ ( 's->', v1 ) ]
if not data1.get( 'oneway', False ) : WAYP1.append( ( '<-s', u1 ) )
WAYP2 = [ ( '->t', u2 ) ]
if not data2.get( 'oneway', False ) : WAYP2.append( ( 't<-', v2 ) )
for s,u in WAYP1 :
p = ROAD.roadify( roadnet, u, length_attr )
for t,v in WAYP2 :
q = ROAD.roadify( roadnet, v, length_attr )
dst = ROAD.distance( roadnet, p, q, length_attr )
cost = cost_dict[s] + dst + cost_dict[t]
options.append( cost )
return options
def _options_roads_eq_yleqx( roadnet, road, length_attr ) :
edge, data = ROAD.obtain_edge( roadnet, road, data_flag=True )
u,v,_ = edge ; roadlen = data.get( length_attr, np.inf )
p = ROAD.roadify( roadnet, u, length_attr )
q = ROAD.roadify( roadnet, v, length_attr )
x = GLOBAL.x ; y = GLOBAL.y
sojourn_cost = roadlen - x + ROAD.distance( roadnet, q, p, length_attr ) + y # a path using the rest of the network
options = [ sojourn_cost ]
if not data.get( 'oneway', False ) :
options.append( x - y )
return options