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change "stride"/"offset" of successive degradeBy/chooseIn

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This avoids (without fixing) #184).

Note that the offset in tidal is currently 0.0001, but using this
would result in excess correlation between sequential uses of
random, which would manifest in failure of the 'supports the randome
choice operator with nesting' test. So I just used 0.0002 instead
This commit is contained in:
Bradford Powell 2022-08-13 21:55:17 -04:00
parent 72f4d3efa8
commit 58dc46b445
2 changed files with 7 additions and 6 deletions
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5
packages/mini/mini.mjs
View File

@ -11,6 +11,7 @@ import { addMiniLocations } from '@strudel.cycles/eval/shapeshifter.mjs';
const { pure, Pattern, Fraction, stack, slowcat, sequence, timeCat, silence, reify } = strudel;
var _seedState = 0;
const randOffset = 0.0002;
function _nextSeed() {
return _seedState++;
@ -28,7 +29,7 @@ const applyOptions = (parent) => (pat, i) => {
case 'bjorklund':
return pat.euclid(operator.arguments_.pulse, operator.arguments_.step, operator.arguments_.rotation);
case 'degradeBy':
return reify(pat)._degradeByWith(strudel.rand.early(Math.PI * _nextSeed()).segment(1), operator.arguments_.amount);
return reify(pat)._degradeByWith(strudel.rand.early(randOffset * _nextSeed()).segment(1), operator.arguments_.amount);
// TODO: case 'fixed-step': "%"
}
console.warn(`operator "${operator.type_}" not implemented`);
@ -91,7 +92,7 @@ export function patternifyAST(ast) {
return stack(...children);
}
if (alignment === 'r') {
return strudel.chooseInWith(strudel.rand.early(Math.PI * _nextSeed()).segment(1), children);
return strudel.chooseInWith(strudel.rand.early(randOffset * _nextSeed()).segment(1), children);
}
const weightedChildren = ast.source_.some((child) => !!child.options_?.weight);
if (!weightedChildren && alignment === 't') {

8
repl/src/test/__snapshots__/tunes.test.mjs.snap
View File

@ -318,10 +318,10 @@ exports[`renders tunes > tune: bossa 1`] = `
exports[`renders tunes > tune: bossaRandom 1`] = `
[
"0/1 -> 1/2: {\\"note\\":\\"G4\\",\\"clip\\":1,\\"s\\":\\"piano\\",\\"pan\\":0.5601851851851851}",
"0/1 -> 1/2: {\\"note\\":\\"B4\\",\\"clip\\":1,\\"s\\":\\"piano\\",\\"pan\\":0.5787037037037037}",
"0/1 -> 1/2: {\\"note\\":\\"C5\\",\\"clip\\":1,\\"s\\":\\"piano\\",\\"pan\\":0.5833333333333333}",
"0/1 -> 1/2: {\\"note\\":\\"E5\\",\\"clip\\":1,\\"s\\":\\"piano\\",\\"pan\\":0.6018518518518519}",
"0/1 -> 1/4: {\\"note\\":\\"G4\\",\\"clip\\":1,\\"s\\":\\"piano\\",\\"pan\\":0.5601851851851851}",
"0/1 -> 1/4: {\\"note\\":\\"B4\\",\\"clip\\":1,\\"s\\":\\"piano\\",\\"pan\\":0.5787037037037037}",
"0/1 -> 1/4: {\\"note\\":\\"C5\\",\\"clip\\":1,\\"s\\":\\"piano\\",\\"pan\\":0.5833333333333333}",
"0/1 -> 1/4: {\\"note\\":\\"E5\\",\\"clip\\":1,\\"s\\":\\"piano\\",\\"pan\\":0.6018518518518519}",
"3/4 -> 1/1: {\\"note\\":\\"G4\\",\\"clip\\":1,\\"s\\":\\"piano\\",\\"pan\\":0.5601851851851851}",
"3/4 -> 1/1: {\\"note\\":\\"B4\\",\\"clip\\":1,\\"s\\":\\"piano\\",\\"pan\\":0.5787037037037037}",
"3/4 -> 1/1: {\\"note\\":\\"C5\\",\\"clip\\":1,\\"s\\":\\"piano\\",\\"pan\\":0.5833333333333333}",