Diagrams/Projects

Potential projects

Looking for something to work on? Try one of these!

See also Diagrams/GSoC which has more ideas.

• Figure out an infrastructure for including animations in the gallery and/or user manual. See https://github.com/diagrams/diagrams-doc/issues/1 .
• Add extra intensional information to help do a better job with combining envelopes? e.g. inner and outer bounding boxes, circles, etc. e.g. if the outer bound of one lies completely inside the inner bound of another, the resulting combined envelope can be optimized to not actually do a max operation.
• contrib module for graph drawing.
  • roundtrip through Graphviz for graph layout?
• Try reimplementing some existing cool graphics or animations using diagrams, either to obtain some cool examples or to help drive new features in diagrams or active. Some possible sources of inspiration:
  • http://web.williams.edu/Mathematics/devadoss/papers.html
  • http://www.bridgesmathart.org/
  • http://recodeproject.com/
  • Joachim Breitner's animation of a copying garbage collector
  • Cool animation demonstrating the concept of prime numbers with orbiting segments for each natural

Officially supported backends

Native SVG

A Haskell-native backend generating SVG. As of diagrams-0.6 this is the default "out-of-the-box" diagrams backend.

• hackage
• github repo
• Status: active development
• Participants: Deepak Jois, Ryan Yates, Felipe Lessa, Brent Yorgey

Cairo

Full-featured backend using cairo.

• hackage
• github repo
• Status: active development
• Participants: Brent Yorgey, Ryan Yates

GTK

Backend built on top of the cairo backend for rendering directly to GTK windows.

• hackage
• github repo
• Status: active development
• Participants: John Lato, Brent Yorgey

Native Postscript

Very similar to the Cairo backend but only outputting EPS.

• hackage
• github repo
• Status: active development
• Participants: Ryan Yates

Unofficial backends

HTML5 canvas

• github repo
• variant ported to work with blank-canvas
• Status: dormant
• Participants: Andy Gill, Brent Yorgey

LaTeX/TikZ

• original darcs repo by Scott Walck
• updated version by Malte Harder on github
• Status: dormant
• Participants: Scott Walck, Malte Harder

POV-Ray

A POV-Ray backend for 3D diagrams.

• github repo
• Status: proof of concept only, needs someone to take it over!

Wanted backends

• OpenGL

Related packages and tools

command-line/interactive

• diagrams-ghci

See also an earlier project in a similar direction:

• diagrams-hint

Build service

diagrams-builder is a library providing the ability to dynamically interpret diagrams code snippets, including utilities for creating temporary files etc. as needed. Useful for making preprocessing tools for embedding diagrams code in other document formats (e.g. LaTeX).

Fonts

The SVGFonts package implements Haskell-native font support (for fonts in the SVG-font format) that can be plugged into diagrams.

Other projects

gtk-toy

Michael Sloan's gtk-toy project is a framework for creating interactive gtk/cairo applications. gtk-toy-diagrams provides tools for using diagrams in conjunction with gtk-toy.

LaTeXgrapher

LaTeXGrapher is a project by Ryan Yates providing a domain-specific language for producing mathematical graphs, backed by the diagrams-postscript backend.

hs-logo

Deepak Jois is working on a logo interpreter written in Haskell, using diagrams as a backend.

Packages using diagrams

• hierarchical-clustering-diagrams