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Graphs

Call graphs and dependency graphs, drawn from your source

Point Understand at your project, right-click anything, and the diagram draws itself from the parsed model.

Start free trial See the graph types

Butterfly. Callers on the left, callees on the right, for any file, function, class or architecture — both directions of the relationship at once.

Call tree. Every path from an entry point down to the function you care about, so you can see how control actually reaches it.

Dependency. What your project really depends on, from file level up to architecture — including the cycles a folder tree hides.

UML class. A class with everything it inherits from, or every class in the project, read straight off the parsed inheritance.

Control flow. Branches and loops inside a single function, with the paths your tests never took called out.

Compare. The same graph across two versions of the project, with everything that was added or removed marked on the drawing.

Works on code that doesn't compile · No build system required · Windows, macOS and Linux

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Why draw it

What a graph shows that a file tree can't

Relationships, not folders

Directory layout tells you where someone decided to put a file. A graph tells you what that file actually talks to — which is rarely the same thing.

Current, every time you open it

The diagram is generated from the parse, not maintained by a person. Nobody has to remember to update it, so nobody can forget.

Something to put in front of people

Export the picture instead of describing the problem in a meeting. PNG, SVG and JPEG for slides; Visio and Graphviz when it has to be edited afterwards.

At real scale

Your codebase is bigger than a demo. That's the point.

Graphs of six tidy boxes are easy. The ones that earn their keep are drawn over hundreds of thousands of lines you did not write, where the structure is the thing you are trying to recover.

Node limits, cluster variants and the customiser toolbar exist for exactly this — so a graph of a real project arrives as something you can read instead of a wall of boxes.

1.2Mlines parsed in the graph shown

9graph types from one parse

0diagrams maintained by hand

A dependency graph across five subsystems. Cluster variants group by file or architecture so the shape stays readable at this density.

Working with graphs

Draw it, shape it, take it with you

A cluster graph variant in Understand, grouping functions by the file they belong to.

Switch variants without starting over

Cluster by file or architecture, show every path between two functions, or diff against a previous version — all from the same graph.

Understand's graph customisation panel, with node and layout options.

Control what gets drawn

Node options, depth limits and legends decide how much of the truth you want on screen at once.

A graph from Understand laid out for printing.

Get it out of the tool

JPEG, PNG, SVG or print. Visio (vdx, vsdx) and Graphviz (dot) when the picture needs editing after it leaves.

In their words

What it replaces

“What would have previously taken me several days (or weeks) can now be accomplished in a matter of hours… It's the Swiss army knife of static analysis tools.”

Randall LandaicheIntuity

“[Understand] is good for discovering the structure of the code dependencies and call-paths… it would have taken me hours to generate the same thing on my own.”

Paul HylandAerospace

US Air Force Read the case study Aurora Flight Sciences Read the case study Pratt & Whitney Read the case study

Draw your first graph today

The trial enables every feature. Point it at your own repository and you will have a call graph on screen before the coffee is cold.

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No credit card. Works fully offline, including air-gapped.