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Beat-oriented functionality (#976)

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* annotate pure values with their value, allowing single mininotation values to maintain their labels as pure
* Don't use any 'patternified' arguments if they're all 'pure'
* allow pattern weights (roughly, beats-per-cycle) to be inferred where possible, including from mininotation and across many transformations (e.g. `fast` with a 'pure' factor)
* Add `beatCat`, similar to `timeCat` but funkier
* `silence` has a weight of 1, add alternative `nothing` with a weight of 0, and `gap` function with weight argument
* preserve weight across applicative operations (weight comes with the structure)
* add `stack` alternatives that take advantage of pattern weights to align patterns differently - `stackLeft`, `stackRight`, `stackCentre`, `stackExpand`, with `stackBy` with an argument for patterning the alignment.
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Alex McLean 2024-03-16 17:24:37 +00:00 • committed by GitHub
parent d102e1dbbc
commit 398533877c
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8 changed files with 1391 additions and 1381 deletions
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24
packages/core/test/pattern.test.mjs
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@ -604,7 +604,7 @@ describe('Pattern', () => {
});
});
describe('polymeter()', () => {
it('Can layer up cycles, stepwise', () => {
it('Can layer up cycles, stepwise, with lists', () => {
expect(polymeterSteps(3, ['d', 'e']).firstCycle()).toStrictEqual(
fastcat(pure('d'), pure('e'), pure('d')).firstCycle(),
);
@ -613,6 +613,9 @@ describe('Pattern', () => {
stack(sequence('a', 'b', 'c', 'a', 'b', 'c'), sequence('d', 'e', 'd', 'e', 'd', 'e')).firstCycle(),
);
});
it('Can layer up cycles, stepwise, with weighted patterns', () => {
sameFirst(polymeterSteps(3, sequence('a', 'b')).fast(2), sequence('a', 'b', 'a', 'b', 'a', 'b'));
});
});
describe('firstOf()', () => {
@ -1116,4 +1119,23 @@ describe('Pattern', () => {
);
});
});
describe('weight', () => {
it('Is correctly preserved/calculated through transformations', () => {
expect(sequence(0, 1, 2, 3).linger(4).weight).toStrictEqual(Fraction(4));
expect(sequence(0, 1, 2, 3).iter(4).weight).toStrictEqual(Fraction(4));
expect(sequence(0, 1, 2, 3).fast(4).weight).toStrictEqual(Fraction(16));
expect(sequence(0, 1, 2, 3).hurry(4).weight).toStrictEqual(Fraction(16));
expect(sequence(0, 1, 2, 3).rev().weight).toStrictEqual(Fraction(4));
expect(sequence(1).segment(10).weight).toStrictEqual(Fraction(10));
expect(sequence(1, 0, 1).invert().weight).toStrictEqual(Fraction(3));
expect(sequence({ s: 'bev' }, { s: 'amenbreak' }).chop(4).weight).toStrictEqual(Fraction(8));
expect(sequence({ s: 'bev' }, { s: 'amenbreak' }).striate(4).weight).toStrictEqual(Fraction(8));
expect(sequence({ s: 'bev' }, { s: 'amenbreak' }).slice(4, sequence(0, 1, 2, 3)).weight).toStrictEqual(
Fraction(4),
);
expect(sequence({ s: 'bev' }, { s: 'amenbreak' }).splice(4, sequence(0, 1, 2, 3)).weight).toStrictEqual(
Fraction(4),
);
});
});
});