- Nodes; I think those are created by the builder when you set up your graph. They are mostly the internal structure of the graph and not that exciting. - You do not want to cast to a feature; you want to say graphable.getObject(). The builder put the feature their when building. Both Nodes and edges are "graphable".
There is some docs here: - http://docs.codehaus.org/display/GEOTDOC/Graphs Have a look at the test cases: - http://svn.osgeo.org/geotools/trunk/modules/extension/graph/src/test/java/org/geotools/graph/ -- Jody Garnett On Monday, 28 February 2011 at 1:02 AM, mounir younes wrote: > How do I create the Node object? Node source =... ? I tried casted a feature > but did not work so i am currently stuck. > > > > .On Sun, Feb 27, 2011 at 4:18 PM, Jody Garnett <jody.garn...@gmail.com> wrote: > Sounds like you are doing everything right, and then having trouble drawing > the result at the end of the day. > > > > The path provides the route between the two locations (think of it as an > > iterator). Each edge of the path is associated with a feature, use the path > > to "Walk" along the edges that make up the shortest route. You can retrieve > > the features along each edge if you want to draw the route visually. > > > > In terms of calculation you may wish to provide an edge weight based on the > > length of the associated feature (or perhaps even the length and speed > > limit). > > > > As for drawing ... > > 1. Write down the feature ids (perhaps in a Set<String>) as your walk along > > the path > > 2a. And then use these feature Ids to update a style (you can make a filter > > using the set of feature ids for the style, and ask the map to draw only > > the features on the path in a specific colour) > > 2b. Or if that is too much; walk along the path, and copy the features into > > a new feature collection, and add the new feature collection to your map. > > > > -- > > Jody Garnett > > > > On Sunday, 27 February 2011 at 5:11 AM, mounir younes wrote: > > > Hello, > > > > > > I will give a small example of what I am willing to do. First let's say I > > > have my house and my friend's house on Layer 1. > > > On layer 2 I have the roads between us. I want to discover the shortest > > > path between my house and my friend's and then colors the roads only > > > without the house. What should I do? I took a look on the graphs on > > > codehaus but couldn't figure out how I should start. > > > > > > I got the steps but cannot figure out the code: > > > > > > 1- Create a feature collection (I know how to do this) > > > 2- add to it the house features (from layer1) and the roads (from layer2) > > > (I know how to do this as well) > > > 3- use the dijkstra included in the graphs extension > > > (http://communitymapbuilder.org/display/GEOTDOC/Graphs#Graphs-GraphingTerms) > > > > > > this will generate a path ! Is a path a straight line ? or is it the > > > roads between our houses? > > > > > > My house will be set as the source and my friend's as the destination > > > > > > 4-Color ONLY the roads between them. > > > > > > could someone help me with this please (step 3 and 4) ? Include code if > > > possible > > > > > > Thank you in advance. > > > ------------------------------------------------------------------------------ > > > Free Software Download: Index, Search & Analyze Logs and other IT data in > > > Real-Time with Splunk. Collect, index and harness all the fast moving IT > > > data > > > generated by your applications, servers and devices whether physical, > > > virtual > > > or in the cloud. Deliver compliance at lower cost and gain new business > > > insights. http://p.sf.net/sfu/splunk-dev2dev > > > _______________________________________________ > > > Geotools-gt2-users mailing list > > > Geotools-gt2-users@lists.sourceforge.net > > > https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users > > > > > >
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