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add seqPLoop, ref #31 (#1182)

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Alex McLean 2024-09-07 22:41:29 +01:00 committed by GitHub
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30
packages/core/pattern.mjs
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@ -1430,6 +1430,36 @@ export function arrange(...sections) {
return s_cat(...sections).slow(total);
}
/**
* Similarly to `arrange`, allows you to arrange multiple patterns together over multiple cycles.
* Unlike `arrange`, you specify a start and stop time for each pattern rather than duration, which
* means that patterns can overlap.
* @return {Pattern}
* @example
seqPLoop([0, 2, "bd(3,8)"],
[1, 3, "cp(3,8)"]
)
.sound()
*/
export function seqPLoop(...parts) {
let total = Fraction(0);
const pats = [];
for (let part of parts) {
if (part.length == 2) {
part.unshift(total);
}
total = part[1];
}
return stack(
...parts.map(([start, stop, pat]) =>
pure(reify(pat)).compress(Fraction(start).div(total), Fraction(stop).div(total)),
),
)
.slow(total)
.innerJoin(); // or resetJoin or restartJoin ??
}
export function fastcat(...pats) {
let result = slowcat(...pats);
if (pats.length > 1) {

20
test/__snapshots__/examples.test.mjs.snap
View File

@ -6850,6 +6850,26 @@ exports[`runs examples > example "seq" example index 0 2`] = `
]
`;
exports[`runs examples > example "seqPLoop" example index 0 1`] = `
[
"[ 0/1 → 1/8 | s:bd ]",
"[ 3/8 → 1/2 | s:bd ]",
"[ 3/4 → 7/8 | s:bd ]",
"[ 1/1 → 9/8 | s:bd ]",
"[ 1/1 → 9/8 | s:cp ]",
"[ 11/8 → 3/2 | s:bd ]",
"[ 11/8 → 3/2 | s:cp ]",
"[ 7/4 → 15/8 | s:bd ]",
"[ 7/4 → 15/8 | s:cp ]",
"[ 2/1 → 17/8 | s:cp ]",
"[ 19/8 → 5/2 | s:cp ]",
"[ 11/4 → 23/8 | s:cp ]",
"[ 3/1 → 25/8 | s:bd ]",
"[ 27/8 → 7/2 | s:bd ]",
"[ 15/4 → 31/8 | s:bd ]",
]
`;
exports[`runs examples > example "shape" example index 0 1`] = `
[
"[ 0/1 → 1/8 | s:hh shape:0 ]",