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Stepwise functions from Tidal (#1060)

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* rename new stepwise functions to match tidal, adding s_expand and s_contract
* created a `stepJoin` for stepwise patternification
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Alex McLean 2024-04-21 21:17:07 +01:00 • committed by GitHub
parent a194180130
commit 0a3694fb82
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5 changed files with 344 additions and 78 deletions
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38
packages/core/test/pattern.test.mjs
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@ -21,8 +21,8 @@ import {
cat,
sequence,
palindrome,
polymeter,
polymeterSteps,
s_polymeter,
s_polymeterSteps,
polyrhythm,
silence,
fast,
@ -603,18 +603,18 @@ describe('Pattern', () => {
);
});
});
describe('polymeter()', () => {
describe('s_polymeter()', () => {
it('Can layer up cycles, stepwise, with lists', () => {
expect(polymeterSteps(3, ['d', 'e']).firstCycle()).toStrictEqual(
expect(s_polymeterSteps(3, ['d', 'e']).firstCycle()).toStrictEqual(
fastcat(pure('d'), pure('e'), pure('d')).firstCycle(),
);
expect(polymeter(['a', 'b', 'c'], ['d', 'e']).fast(2).firstCycle()).toStrictEqual(
expect(s_polymeter(['a', 'b', 'c'], ['d', 'e']).fast(2).firstCycle()).toStrictEqual(
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'));
sameFirst(s_polymeterSteps(3, sequence('a', 'b')).fast(2), sequence('a', 'b', 'a', 'b', 'a', 'b'));
});
});
@ -1138,28 +1138,26 @@ describe('Pattern', () => {
);
});
});
describe('steptaper', () => {
describe('s_taper', () => {
it('can taper', () => {
expect(sameFirst(sequence(0, 1, 2, 3, 4).steptaper(1, 5), sequence(0, 1, 2, 3, 4, 0, 1, 2, 3, 0, 1, 2, 0, 1, 0)));
expect(sameFirst(sequence(0, 1, 2, 3, 4).s_taper(1, 5), sequence(0, 1, 2, 3, 4, 0, 1, 2, 3, 0, 1, 2, 0, 1, 0)));
});
it('can taper backwards', () => {
expect(
sameFirst(sequence(0, 1, 2, 3, 4).steptaper(-1, 5), sequence(0, 0, 1, 0, 1, 2, 0, 1, 2, 3, 0, 1, 2, 3, 4)),
);
expect(sameFirst(sequence(0, 1, 2, 3, 4).s_taper(-1, 5), sequence(0, 0, 1, 0, 1, 2, 0, 1, 2, 3, 0, 1, 2, 3, 4)));
});
});
describe('wax and wane, left', () => {
it('can wax from the left', () => {
expect(sameFirst(sequence(0, 1, 2, 3, 4).stepwax(2), sequence(0, 1)));
describe('s_add and s_sub, left', () => {
it('can add from the left', () => {
expect(sameFirst(sequence(0, 1, 2, 3, 4).s_add(2), sequence(0, 1)));
});
it('can wane to the left', () => {
expect(sameFirst(sequence(0, 1, 2, 3, 4).stepwane(2), sequence(0, 1, 2)));
it('can sub to the left', () => {
expect(sameFirst(sequence(0, 1, 2, 3, 4).s_sub(2), sequence(0, 1, 2)));
});
it('can wax from the right', () => {
expect(sameFirst(sequence(0, 1, 2, 3, 4).stepwax(-2), sequence(3, 4)));
it('can add from the right', () => {
expect(sameFirst(sequence(0, 1, 2, 3, 4).s_add(-2), sequence(3, 4)));
});
it('can wane to the right', () => {
expect(sameFirst(sequence(0, 1, 2, 3, 4).stepwane(-2), sequence(2, 3, 4)));
it('can sub to the right', () => {
expect(sameFirst(sequence(0, 1, 2, 3, 4).s_sub(-2), sequence(2, 3, 4)));
});
});
});