Prewrite : FilterPattern : Pattern : AbstractFunction : Object

Description

Lindenmayer system pattern for selfsimilar structures. Its dictionary (or event) maps one element to an array of child elements. The algorithm replaces iteratively (levels deep) elements by arrays of elements starting with the values in the pattern.

Class Methods

Prewrite.new(pattern, dict, levels: 1)

IdentityDictionary[

    elem1 -> [ otherElements ],

    elem2 -> [ otherElements ],

    elem2 -> [ otherElements ]

]

Inherited class methods

Instance Methods

Inherited instance methods

Undocumented instance methods

.dict

.dict = value

.embedInStream(inval)

.levels

.levels = value

.rewriteList(list, inval, level)

Examples

The examples use the () shortcut for Event.// A generative song ( // Scale degrees going up Pdef(\a, Pbind(\dur, 0.25, \degree, Pseq((0..3)))); // Scale degrees going down Pdef(\b, Pbind(\dur, 0.25, \degree, Pseq((3..0)))); // Random scale degrees Pdef(\c, Pbind(\dur, 0.125, \degree, Pwhite(0,10, 8))); // Use the L-system to put together a sequence of keys // Psym will then retrieve the patterns from the global Pdef dictionary // See the post window for info about which of these are playing Psym( Prewrite(\a, // start with pattern \a ( \a: #[\a, \b], \b: #[\c, \a], \c: #[\a, \b] ), 4).trace ).play ) // Inspect the L-system to see what data it produces ( a = Prewrite(0, // start with 0 ( 0: #[2,0], 1: #[0,0,1], 2: #[1,0,1] ), 4); x = a.asStream; 30.do({ x.next.postln }); )

// A generative song

(

// Scale degrees going up

Pdef(\a, Pbind(\dur, 0.25, \degree, Pseq((0..3))));

​

// Scale degrees going down

Pdef(\b, Pbind(\dur, 0.25, \degree, Pseq((3..0))));

​

// Random scale degrees

Pdef(\c, Pbind(\dur, 0.125, \degree, Pwhite(0,10, 8)));

​

// Use the L-system to put together a sequence of keys

// Psym will then retrieve the patterns from the global Pdef dictionary

// See the post window for info about which of these are playing

Psym(

    Prewrite(\a, // start with pattern \a

        (

            \a: #[\a, \b],

            \b: #[\c, \a],

            \c: #[\a, \b]

    ), 4).trace

).play

)

​

// Inspect the L-system to see what data it produces

(

a = Prewrite(0, // start with 0

    (

        0: #[2,0],

        1: #[0,0,1],

        2: #[1,0,1]

), 4);

x = a.asStream;

30.do({ x.next.postln });

)