Copyright	(c) Owen Shepherd 2019
License	BSD-3-Clause
Maintainer	414owen@gmail.com
Stability	experimental
Safe Haskell	None
Language	Haskell2010

Art.ContextFree

Description

Create art via context free grammar production rules.

Synopsis

data Modifier
- = Color String
- | Scale Float
- | Move Vec
- | Rotate Float
data Symbol
- = NonTerminal (NonEmpty Production)
- | Mod [Modifier] Symbol
- | Circle Float
- | Poly [Vec]
type Vec = (Float, Float)
type Production = (Float, Symbol)
interpret :: Symbol -> IO Svg

Documentation

data Modifier Source #

Change the style applied to all downstream terminal symbols.

Constructors

Color String
Scale Float
Move Vec
Rotate Float

data Symbol Source #

A terminal or non-terminal symbol.

Constructors

NonTerminal (NonEmpty Production)	A non-terminal symbol.
Mod [Modifier] Symbol	Apply modifications to sub-productions.
Circle Float	Produce a circle with a radius.
Poly [Vec]	Produce a polygon by relative points. Starts and ends at (0, 0).

type Vec = (Float, Float) Source #

A vector in 2d euclidian space.

type Production = (Float, Symbol) Source #

A production rule, including a starting probability of generation, a list of styles to be applied to sub-grammars, and a non-empty list of symbols to produce.

interpret :: Symbol -> IO Svg Source #

Create a drawing from a grammar. In order to get a string representation, you'll need to use one of blaze-svg's render functions, for example renderSvg.