add range

packages/core/strudel.mjs

@@ -520,6 +520,11 @@ class Pattern {
     return this._asNumber().fmap((v) => Math.ceil(v));
   }
 
+  // Assumes source pattern of numbers in range 0..1
+  range(min, max) {
+    return this.mul(max-min).add(min);
+  }
+
   union(other) {
     return this._opleft(other, (a) => (b) => Object.assign({}, a, b));
   }
@@ -1102,6 +1107,7 @@ const sub = curry((a, pat) => pat.sub(a));
 const mul = curry((a, pat) => pat.mul(a));
 const div = curry((a, pat) => pat.div(a));
 const union = curry((a, pat) => pat.union(a));
+const range = curry((a, b, pat) => pat.range(a,b));
 const every = curry((i, f, pat) => pat.every(i, f));
 const when = curry((binary, f, pat) => pat.when(binary, f));
 const off = curry((t, f, pat) => pat.off(t, f));
@@ -1259,6 +1265,7 @@ export {
   mul,
   div,
   union,
+  range,
   every,
   when,
   off,

packages/core/test/pattern.test.mjs

@@ -538,4 +538,12 @@ describe('Pattern', function() {
       )
     })
   })
+  describe("range", () => {
+    it("Can change the range of a unipolar pattern", () => {
+      assert.deepStrictEqual(
+        sequence(0,0.25,0.5,0.75).range(1000,1100).firstCycle(),
+        sequence(1000,1025,1050,1075).firstCycle()
+      )
+    })
+  })
 })