Attempt to impose limits

voicegardens/static/voicegardens.js

@@ -10,6 +10,9 @@ var _canvas;
 // Offline recording duration
 var offlineRecordingDuration = 3000;
 
+// Offline limits for hardware consierations
+var offlineLimits = 6;
+
 // URL which exposes the archive saving API end-point
 var archiveUrl = window.location + "add-to-archive";
 var archiveListingUrl = window.location + "archive";
@@ -80,6 +83,22 @@ function stop() {
   }
 }
 
+function gardenOfflineLimits() {
+  /**
+   * Ensure shapes stay within limits
+   **/
+  if (shapes.length < offlineLimits) return;
+
+  for (let i = 0; i < shapes.length; i++) {
+    let shape = shapes[i];
+    shape.hide();
+  }
+
+  while (shapes.length > 0) {
+    shapes.pop();
+  }
+}
+
 function sendToArchive() {
   /**
    * Send the sound to the back-end for archiving.
@@ -286,6 +305,9 @@ class GeneratedShape {
     this.nextTick = random(1000, 9000);
     this.tickTimer = 0;
 
+    // Should remain hidden
+    this.hidden = false;
+
     this.initialise();
   }
 
@@ -355,10 +377,26 @@ class GeneratedShape {
     }
   }
 
+  hide() {
+    /**
+     * Hide the shape
+     **/
+    if (!this.hidden) {
+      this.hidden = true;
+    }
+
+    while (this.colour._getAlpha() > 0) {
+      let currentAlpha = this.colour._getAlpha();
+      this.colour.setAlpha(currentAlpha - random(0, 3));
+    }
+  }
+
   docolour() {
     /**
      * Draw colour and fade-in shape.
      **/
+    if (this.hidden === true) return;
+
     if (this.opacity != 256) {
       if (this.opacity < 256) {
         // shape should fade in, so increment alpha value
@@ -552,6 +590,7 @@ function draw() {
       let amp = sound.getPeaks(1)[0] * 100;
       let dur = sound.duration();
       let shape = new GeneratedShape(sound, amp, dur);
+      gardenOfflineLimits();
       shape.sound();
       shapes.push(shape);
       sendToArchive();