Package: nx2ipe
networkX to IpeConvert networkX graphs into Ipe drawings.1. Create a graphYou can style the different elements of your drawing by adding attributes to your networkX graph object.X and Y attributes are requiredand used to fix the position of nodes in the graph. Additional attributes can be added but are not required.
All properties of the drawing are customized in the settings.ini file.importnetworkxasnxfromnx2ipe.nx2ipeimportIpeConverterG=nx.Graph()G.add_node(0,Label='a',X='0',Y='50',Glyph='mark/cross(sx)')G.add_node(1,Label='asdf',X='50',Y='100',Stroke='purple',Fill='yellow')G.add_node(2,Label='v_1',X='50',Y='0',Size='5.0')G.add_node(3,Label='v_{12}',X='200',Y='50',Layer='layer1')G.add_edge(0,1,Label='sas')G.add_edge(0,2,Pen='fat',Stroke='green')G.add_edge(1,3)G.add_edge(2,3)2. Draw the graphconverter=IpeConverter()converter.createDrawing(G,'undirected.xml')It is also possible to add a path to a custom global settings file. Furthermore, a list of paths to style sheets can be added if you want to add references to custom style properties (e.g. colors, glyps).
The basic Ipe style sheet is automatically loaded.converter=IpeConverter(settings_path='path/to/costum/settings.ini',styles=['mycolors.xml','myglyphs.xml'])3. More examplesDifferent approaches exist to assign color to vertices and edges. Generally, one can assign the color names that are defined in the basic ipe style sheet.
Furthermore, it is also possible to reference colors by their names in defined style sheets.
Finally, it is possible to assign Hex colors which are automatically converted to a style sheet.G=nx.DiGraph()G.add_node(0,Label='v_{1}',X='0',Y='100',Color='green')G.add_node(1,Label='v_{2}',X='100',Y='200')G.add_node(2,Label='v_{3}',X='100',Y='0')G.add_node(3,Label='v_{4}',X='200',Y='100',Color='#000000',Fill='#99FF00')G.add_edge(0,1,Label='5',Color='red')G.add_edge(0,2,Label='10',Color='#FF0099')G.add_edge(1,3,Label='20',Color='#F09')G.add_edge(2,3,Label='15')G.add_edge(3,2,Label='8')converter.createDrawing(G,'colored_graph.xml')Directed graphs can be visualized by setting the _GRAPH_DIRECTED property to True.G=nx.DiGraph()G.add_node(0,Label='v_{1}',X='0',Y='100')G.add_node(1,Label='v_{2}',X='100',Y='200')G.add_node(2,Label='v_{3}',X='100',Y='0')G.add_node(3,Label='v_{4}',X='200',Y='100')G.add_edge(0,1,Label='5')G.add_edge(0,2,Label='10')G.add_edge(1,3,Label='20')G.add_edge(2,3,Label='15')G.add_edge(3,2,Label='8')converter._options._GRAPH_DIRECTED=Trueconverter.createDrawing(G,'directed.xml')There is also a draw style that uses arcs instead of straight lines to connect adjacent nodes.converter._options._DRAWING_USE_ARCS=Trueconverter._options._DRAWING_UNBOUND=Falseconverter.createDrawing(G,'directed_arcs.xml')The graph can also be drawn on a specifically sized canvas. In this case 2 * A4. The graph is automatically scaled to fit while maintaining its aspect ratio.converter._options._DRAWING_WIDTH=2*596converter._options._DRAWING_HEIGHT=2*843converter._options._DRAWING_MARGIN=100converter.createDrawing(G,'directed_arcs_A3.xml')It is also possible to snap nodes to the closest Ipe grid point when setting a grid size and the snap property.converter._options._DRAWING_WIDTH=596/2converter._options._DRAWING_HEIGHT=843/2converter._options._DRAWING_GRID_SIZE=56converter._options._DRAWING_SNAP_TO_GRID=Trueconverter.createDrawing(G,'snap_to_grid.xml')