Automatic Drawing of Topologies and Diagrams

Info

The drawing module is in principle fully functional, but not fully tuned. Flaws like part of the drawing reaching outside of the bounding box, imperfect layout, etc. are to be expected currently.

Since the easiest method to examine Feynman diagrams is by inspecting them visually, FeynGraph provides functions for the automatic layouting and drawing of topologies and diagrams. FeynGraph currently supports two formats:

• TikZ: per-diagram output of a standalone .tikz file which can be directly imported in a LaTeX document via TikZ or modified with TikZiT. This requires the additional feyngraph.tikzdefs and feyngraph.tikzstyles files which are distributed in <prefix>/share/FeynGraph.
• SVG: per-diagram output of a standalone .svg file or a single .svg file with large canvas containing multiple diagrams in a grid.

Drawing functions are provided by the Topology and Diagram(View) objects for drawing of a single diagram and by the respective container objects for drawing of multiple diagrams.

Example

Python Rust

from feyngraph import generate_diagrams
diags = generate_diagrams(["u", "u~"], ["g", "g"], 0)
diags.draw_svg(list(range(len(diags))))

use feyngraph::generate_diagrams;
let diags = generate_diagrams(["u", "u~"], ["g", "g"], 0, None, None);
diags.draw_svg(..diags.len());

Resulting automatically drawn Feynman diagrams

Example

Python Rust

from feyngraph.topology import TopologyGenerator, TopologySelector, TopologyModel
s = TopologySelector()
s.select_on_shell()
s.select_self_loops(0)
topos = TopologyGenerator(4, 3, TopologyModel([3, 4]), selector = s).generate()
topos.draw([0, 1, 2])

use feyngraph::{model::TopologyModel, topology::{TopologyGenerator, TopologySelector}};
let mut s = TopologySelector::new();
s.select_on_shell();
s.select_self_loops(0);
let topos = TopologyGenerator::new(4, 3, TopologyModel::from(vec![3, 4]), Some(s)).generate();
topos.draw(..3);

Resulting automatically drawn Topologies

Tip

The Python types implement the _repr_svg_ method, therefore the respective objects are drawn automatically when using a Jupyter notebook. Only the first 100 topologies/diagrams of a container object are drawn with the _repr_svg_ method.