[GraphHopper] How graphhopper handle the barrier=gate?

[John Zhao]

Hi Peter,

I understand it's in each flager.
My question is how GH block that zero length edge.
I don't find the corresponding log.

I think there are several ways to handle this:
1. convert it to turn restriction.
2. create a virtual node, but don't connect the virtual node and real node.
Then they are not connected.

But graphhopper use another way:
create a virtual node. then create an virtual edge between the virtual node
and real node.
I guess GH need to make some special configure on the virtual edge.

*Best Regards,*
*ZhiQiang ZHAO*

On Thu, Jul 9, 2015 at 12:08 AM, Peter <graphhopper at gmx.de> wrote:

>  If and how a barrier is blocking is handled in the specific FlagEncoder:
>
>
> https://github.com/graphhopper/graphhopper/blob/master/core/src/main/java/com/graphhopper/routing/util/CarFlagEncoder.java#L86
>
> Regards,
> Peter
>
>
> On 09.07.2015 02:43, John Zhao wrote:
>
> Hi,
>
>  I looked into OSMReader.processWay( )
> There is already a lot of comments. But it's still not clear to me. :p
>
>  I understand GH will create a "virtual" node, with the same lat/lon.
> And then create a new edge between the 2 nodes.
> But how to block this edge?
> set the direction bit of the zero length edge both to false? where is the
> code?
>
> // create zero length edge for barriercreatedEdges.addAll(addBarrierEdge(newNodeId, nodeId, wayFlags, nodeFlags, wayOsmId));
>
>  *Best Regards,*
> *ZhiQiang ZHAO*
>
>
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