feat: new LFO waveforms

packages/timing/src/lfo/modulated-property.js

@@ -9,18 +9,26 @@ const Modulator = {
     return () => 0.5;
   },
 
-  Linear() {
-    return (location) => location;
-  },
-
   Random({variance = 0.4} = {}) {
     return () => Math.abs((Math.random() * (variance + variance) - variance)) % 1;
   },
 
+  Sawtooth() {
+    return (location) => location;
+  },
+
   Sine() {
     return (location) => 0.5 * (1 + Math.sin(location * Math.PI * 2));
   },
 
+  Square() {
+    return (location) => (location < 0.5 ? 0 : 1);
+  },
+
+  Triangle() {
+    return (location) => 2 * Math.abs(((location + 0.75) % 1) - 0.5);
+  },
+
 };
 
 const decorate = compose(
@@ -55,7 +63,7 @@ export default class ModulatedProperty extends decorate(Class) {
     this.key = key;
     if (!modulators) {
       // eslint-disable-next-line no-param-reassign
-      modulators = [Modulator.Linear];
+      modulators = [Modulator.Triangle];
     }
     if (!Array.isArray(modulators)) {
       // eslint-disable-next-line no-param-reassign
@@ -70,12 +78,12 @@ export default class ModulatedProperty extends decorate(Class) {
     this.min = this.median - (magnitude / 2);
     const modulatorFunction = (modulator) => {
       if ('string' === typeof modulator) {
-        return Modulator[modulator] ? Modulator[modulator] : Modulator.Linear;
+        return Modulator[modulator] ? Modulator[modulator] : Modulator.Triangle;
       }
       if ('function' === typeof modulator) {
         return modulator;
       }
-      return Modulator.Linear;
+      return Modulator.Triangle;
     };
     this.modulators = modulators.map((modulator) => {
       if ('object' !== typeof modulator) {