blockdiagcontrib-math

A plugin for blockdiag that provides LaTeX math as background of nodes.

examples

blockdiagcontrib-math detects label attribute starts with ‘math://’, and converts it as math formula using LaTeX and dvipng.

Example:

blockdiag {
  plugin math;
  A [label = "math://\int_{0}^{\infty} f(x)dx"];
  A -> B;
}

resize node to size of formula

blockdiag-contrib-math adds new node attribute named resizable. If true is set, the plugin resizes node to size of formula automatically:

blockdiag {
  plugin math;
  A [resizable = true, label = "math://\int_{0}^{\infty} f(x)dx"];
  B [resizable = true, label = "math://\int_{0}^{\infty} f(x)dx \\ \int_{0}^{\infty} f(y) dy"];
  A -> B;
}

Note

resizable attribute depends on blockdiag-1.4.5 or newer.

change style of formula

blockdiagcontrib-math supports applying user defined style:

blockdiag {
  plugin math[style = "mystyle.sty"];
  A [label = "math://\int_{0}^{\infty} f(x)dx"];
  A -> B;
}

blockdiagcontrib-math searchs stylefile from directory of source file.

change formula envrionment

blockdiagcontrib-math uses align* environment by default.

If you want to change formula environment to others, there is two way to switch it.

Change default environment

math plugin allows env option. it changes default formula environment:

blockdiag {
  plugin math[env = "eqnarray*"];
  A [label = "math://\int_{0}^{\infty} f(x)dx"];
  A -> B;
}

Change environment per node

Declare any environmet as URI schema. it changes formula environment per node:

blockdiag {
  plugin math
  A [label = "math+eqnarray*://\int_{0}^{\infty} f(x)dx"];
  A -> B;
}

Requirements

• blockdiag 1.4.2 or later
• LaTeX
• dvipng

License

Apache License 2.0