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I am using the algorithm with all the default settings. For many graphs, I notice a crossing of the edges that should be avoided. I am including one example of a graph in the dot format. I can send more examples, including pictures. digraph graph2 { PE727 -> PE729 PE725 -> PE727 PE721 -> PE725 PE716 -> PE721 PE618 -> PE718 PE618 -> PE717 PE618 -> PE715 PE618 -> PE714 PE618 -> PE713 PE618 -> PE716 PE718 -> PE723 PE717 -> PE722 PE714 -> PE720 PE713 -> PE719 PE719 -> PE724 PE724 -> PE726 PE726 -> PE728 PE617 -> PE618 PE616 -> PE617 PE18 -> PE500 PE18 -> PE341 PE18 -> PE99 PE18 -> PE616 PE500 -> PE503 PE500 -> PE502 PE500 -> PE501 PE503 -> PE507 PE507 -> PE509 PE509 -> PE579 PE509 -> PE576 PE509 -> PE573 PE509 -> PE572 PE502 -> PE506 PE506 -> PE508 PE508 -> PE578 PE508 -> PE575 PE508 -> PE571 PE508 -> PE569 PE501 -> PE504 PE504 -> PE505 PE505 -> PE577 PE505 -> PE574 PE505 -> PE570 PE505 -> PE568 PE341 -> PE348 PE341 -> PE347 PE341 -> PE346 PE341 -> PE343 PE341 -> PE342 PE341 -> PE349 PE349 -> PE353 PE353 -> PE366 PE366 -> PE367 PE352 -> PE366 PE348 -> PE352 PE351 -> PE366 PE347 -> PE351 PE350 -> PE366 PE346 -> PE350 PE345 -> PE366 PE343 -> PE345 PE344 -> PE366 PE342 -> PE344 PE99 -> PE102 PE99 -> PE101 PE99 -> PE100 PE102 -> PE177 PE102 -> PE176 PE102 -> PE105 PE101 -> PE107 PE101 -> PE106 PE101 -> PE104 PE104 -> PE184 PE100 -> PE103 PE103 -> PE183 PE103 -> PE182 PE103 -> PE181 PE103 -> PE180 PE103 -> PE179 PE103 -> PE178 PE181 -> PE187 PE179 -> PE186 PE178 -> PE185 }
Created attachment 36814 [details] testcase: 4 examples of graphs The bmp files in this example show the draw2d graphlayout results on the left, and the layouts by a non-open-source layout algorithm on the right. The dot files contain the description of the corresponding graphs.
Hi, Can I ask how you loaded the dot format files into a Draw2d example?
Hi, I created a simple program that reads the file below and creates nodes and edges from them. I then ran Draw2D. Unfortunately, I don't have this test program anymore, since it has been some time since I tried this. In the meantime, I am using Graphviz as my graph layout engine, and that works fine. In my program I produce a dot file, that I stream into a "dot" (graphviz) process with "Runtime.exec(), and I capture the output stream from "dot" (it has a "plain output file format). I then populate my graphics program with these results. Dot is working great, even for large (thousands) of nodes. Would it make sense to add a function to Draw2D so that you can connect to a dot layout engine (like i did), rather than using the draw2d graph layout engine? Thanks. -Wim
I started playing with an example to read dot files as well. It would be neat if you could contribute your connection to the dot engine as something we could add to the examples.
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