Merge pull request #44 from tidalcycles/fix-polymeter

Fix polymeter

packages/core/strudel.mjs

@@ -979,7 +979,7 @@ function sequence(...xs) {
   return _sequenceCount(xs)[0];
 }
 
-function polymeter(steps = 0, ...args) {
+function polymeterSteps(steps, ...args) {
   const seqs = args.map((a) => _sequenceCount(a));
   if (seqs.length == 0) {
     return silence;
@@ -995,15 +995,20 @@ function polymeter(steps = 0, ...args) {
     if (steps == seq[1]) {
       pats.push(seq[0]);
     } else {
+      console.log("aha");
       pats.push(seq[0]._fast(Fraction(steps).div(Fraction(seq[1]))));
     }
   }
-  return stack(pats);
+  return stack(...pats);
+}
+
+function polymeter(...args) {
+  return polymeterSteps(0, ...args);
 }
 
 // alias
-function pm(args) {
-  polymeter(args);
+function pm(...args) {
+  polymeter(...args);
 }
 
 function polyrhythm(...xs) {
@@ -1168,6 +1173,7 @@ export {
   cat,
   timeCat,
   sequence,
+  polymeterSteps,
   polymeter,
   pm,
   polyrhythm,

packages/core/test/pattern.test.mjs

@@ -13,6 +13,8 @@ import {
   slowcat,
   cat,
   sequence,
+  polymeter,
+  polymeterSteps,
   polyrhythm,
   silence,
   fast,
@@ -280,6 +282,21 @@ describe('Pattern', function() {
       )
     })
   })
+  describe('polymeter()', () => {
+    it('Can layer up cycles, stepwise', () => {
+      assert.deepStrictEqual(
+        polymeterSteps(3, ["d","e"]).firstCycle(),
+        fastcat(pure("d"),pure("e"),pure("d")).firstCycle()
+      )
+      assert.deepStrictEqual(
+        polymeter(["a","b","c"],["d","e"]).fast(2).firstCycle(),
+        stack(sequence("a","b","c","a","b","c"),
+              sequence("d","e","d","e","d","e")
+        ).firstCycle()
+      )
+    })
+  })
+
   describe('every()', () => {
     it('Can apply a function every 3rd time', () => {
       assert.deepStrictEqual(