Hello Harshad, It is abstract because so that you can define a cost function and movement heuristic appropriate for your particular graph.
If you look at the sources or javadocs for the AStartIterator class you will see that there is an explanation (including pseudo-code) there. There is also a link to a Wikipedia article with more detail about the algorithm. I've just fixed the bad formatting of the javadocs for that class so if you are viewing it online the page will look a lot better in a few minutes when the docs are rebuilt (you might have to clear your browser cache too). Michael On 27 September 2011 17:01, Harshad S <[email protected]> wrote: > Hi, > > Can anyone tell me what should be the 4th parameter while > instantiating the AStarShortestPathFinder class. In the link here, > http://docs.geotools.org/latest/javadocs/org/geotools/graph/path/AStarShortestPathFinder.html > , it says AStarIterator.AStarFunctions instance. But it is an abstract > class. Please help. > > > Thank You. > Harshad Shrikhande > Researcher R&D > TCS Innovations Infra Lab, Chennai > Tata Consultancy Services > Cell:- 7200605821 > Mailto: [email protected] > Website: http://www.tcs.com > ____________________________________________ > Experience certainty. IT Services > Business Solutions > Outsourcing > ____________________________________________ > > -----Harshad S wrote: ----- > > To: [email protected] > From: Harshad S <[email protected]> > Date: 09/27/2011 10:58AM > Subject: [Geotools-gt2-users] Reg Graph Generation from Shapefiles > > Hi all, > > I am back at bugging you all guys. I am trying to create a graph > from a shapefile (some road network data). How do I make a graph from the > shapefile and then run a shortest-path finder algorithm. Please help me with > the classes that will be required for doing this. > > > Thank You. > Harshad Shrikhande > Researcher R&D > TCS Innovations Infra Lab, Chennai > Tata Consultancy Services > Cell:- 7200605821 > Mailto: [email protected] > Website: http://www.tcs.com > ____________________________________________ > Experience certainty. IT Services > Business Solutions > Outsourcing > ____________________________________________ > > =====-----=====-----===== > Notice: The information contained in this e-mail > message and/or attachments to it may contain > confidential or privileged information. If you are > not the intended recipient, any dissemination, use, > review, distribution, printing or copying of the > information contained in this e-mail message > and/or attachments to it are strictly prohibited. If > you have received this communication in error, > please notify us by reply e-mail or telephone and > immediately and permanently delete the message > and any attachments. Thank you > > > ------------------------------------------------------------------------------ > All the data continuously generated in your IT infrastructure contains a > definitive record of customers, application performance, security > threats, fraudulent activity and more. Splunk takes this data and makes > sense of it. Business sense. IT sense. Common sense. > http://p.sf.net/sfu/splunk-d2dcopy1 > > _______________________________________________ > Geotools-gt2-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users > > ------------------------------------------------------------------------------ > All the data continuously generated in your IT infrastructure contains a > definitive record of customers, application performance, security > threats, fraudulent activity and more. Splunk takes this data and makes > sense of it. Business sense. IT sense. Common sense. > http://p.sf.net/sfu/splunk-d2dcopy1 > _______________________________________________ > Geotools-gt2-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users > > ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense. http://p.sf.net/sfu/splunk-d2dcopy1 _______________________________________________ Geotools-gt2-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
