F Prime Visualizer (FPV)

F Prime Visualizer (FPV) is a browser-based topology visualizer for the F´ (F Prime) flight software and embedded systems framework.

FPV is a web application written in Flask.

Installation

pip install fprime-visual

Running

Data source

FPV reads .json files created by F Prime Layout.

Reference .json files live in the examples directory so you can test drive the application right away.

fprime-visual --source-dir examples/

Stopping

Ctrl + C will stop the application.

Selecting a Theme

You can change the look of FPV by selecting one of the themes residing in the flask/static/js/themes directory. Themes can be selected with the following argument

fprime-visual --theme dark

Capturing a full size screenshot

A screenshot button in the top banner allows for capturing a screenshot of the current view as a PNG image.

Customizing FPV

Creating Your Own Theme

Theme colors use RGBA (RGB color values with an Alpha channel). The alpha channel is particularly important for the component box backgrounds. Connection lines occasionally route behind component boxes, so an opaque percentage value of 80% (.8) on those boxes is strongly encouraged.

Example: backgroundColor: "rgba(61, 61, 61, .80)"

Making Changes to the Canvas

You can make more intensive changes, such as connection line width and column width, by editing the config variable at the top of the public/js/canvas.js file.