<div dir="ltr">Hi Peter,<div><br></div><div>I am a little understand why Graphhopper use a virtual edge at gate.</div><div>Cause you may need support car and foot at the same time.</div><div>Then you can disable that virtual edge on car, but enable it on foot.</div><div>That's why you don't just simply break the segment there.</div><div><br></div><div>Actually, you can use turn restriction to avoid the virtual edge.</div><div>I assume the turn restriction feature was implemented later than barrier=gate.</div><div><br></div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature"><b>Best Regards,</b><div><b>ZhiQiang ZHAO</b></div></div></div>
<br><div class="gmail_quote">On Thu, Jul 9, 2015 at 12:23 AM, Peter <span dir="ltr"><<a href="mailto:graphhopper@gmx.de" target="_blank">graphhopper@gmx.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
  
    
  
  <div bgcolor="#FFFFFF" text="#000000">
    <div>You can block the edge like you
      restrict access of any other edge:<br>
      set the access bits to false - it should be something like this:<br>
      edge.setFlags(encoder.setAccess(edge.getFlags(), false, false))<span class="HOEnZb"><font color="#888888"><br>
      <br>
      Peter</font></span><div><div class="h5"><br>
      <br>
      On 09.07.2015 09:13, John Zhao wrote:<br>
    </div></div></div><div><div class="h5">
    <blockquote type="cite">
      <div dir="ltr">Hi Peter,
        <div><br>
        </div>
        <div>I understand it's in each flager.</div>
        <div>My question is how GH block that zero length edge.</div>
        <div>I don't find the corresponding log.</div>
        <div><br>
        </div>
        <div>I think there are several ways to handle this:</div>
        <div>1. convert it to turn restriction.</div>
        <div>2. create a virtual node, but don't connect the virtual
          node and real node. Then they are not connected.</div>
        <div><br>
        </div>
        <div>But graphhopper use another way:</div>
        <div>create a virtual node. then create an virtual edge between
          the virtual node and real node.</div>
        <div>I guess GH need to make some special configure on the
          virtual edge.</div>
      </div>
      <div class="gmail_extra"><br clear="all">
        <div>
          <div><b>Best Regards,</b>
            <div><b>ZhiQiang ZHAO</b></div>
          </div>
        </div>
        <br>
        <div class="gmail_quote">On Thu, Jul 9, 2015 at 12:08 AM, Peter
          <span dir="ltr"><<a href="mailto:graphhopper@gmx.de" target="_blank">graphhopper@gmx.de</a>></span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
            <div bgcolor="#FFFFFF" text="#000000">
              <div>If and how a barrier is blocking is handled in the
                specific FlagEncoder:<br>
                <br>
                <a href="https://github.com/graphhopper/graphhopper/blob/master/core/src/main/java/com/graphhopper/routing/util/CarFlagEncoder.java#L86" target="_blank">https://github.com/graphhopper/graphhopper/blob/master/core/src/main/java/com/graphhopper/routing/util/CarFlagEncoder.java#L86</a><br>
                <br>
                Regards,<br>
                Peter
                <div>
                  <div><br>
                    <br>
                    On 09.07.2015 02:43, John Zhao wrote:<br>
                  </div>
                </div>
              </div>
              <blockquote type="cite">
                <div>
                  <div>
                    <div dir="ltr">Hi,
                      <div><br>
                      </div>
                      <div>I looked into OSMReader.processWay( )</div>
                      <div>There is already a lot of comments. But it's
                        still not clear to me. :p</div>
                      <div><br>
                      </div>
                      <div>I understand GH will create a "virtual" node,
                        with the same lat/lon.</div>
                      <div>And then create a new edge between the 2
                        nodes.</div>
                      <div>But how to block this edge?</div>
                      <div>set the direction bit of the zero length edge
                        both to false? where is the code?</div>
                      <div>
                        <pre style="color:rgb(0,0,0);font-family:Menlo;font-size:12pt"><span style="color:rgb(128,128,128);font-style:italic">// create zero length edge for barrier
</span>createdEdges.addAll(addBarrierEdge(newNodeId, nodeId, wayFlags, nodeFlags, wayOsmId));</pre>
                        <div>
                          <div><b>Best Regards,</b>
                            <div><b>ZhiQiang ZHAO</b></div>
                          </div>
                        </div>
                      </div>
                    </div>
                    <br>
                  </div>
                </div>
              </blockquote>
            </div>
          </blockquote>
        </div>
      </div>
    </blockquote>
    <br>
  </div></div></div>

<br>_______________________________________________<br>
GraphHopper mailing list<br>
<a href="mailto:GraphHopper@openstreetmap.org">GraphHopper@openstreetmap.org</a><br>
<a href="https://lists.openstreetmap.org/listinfo/graphhopper" rel="noreferrer" target="_blank">https://lists.openstreetmap.org/listinfo/graphhopper</a><br>
<br></blockquote></div><br></div>