Make soundtrack state configurable, closes #5

src/sketch.js

@@ -2,21 +2,68 @@
 * DEFINITIONS
 */
 
+// sound controller container
+let soundOn = false;
+
 // perlin noise terrain container
 let terrain;
 
 // soundtrack p5.SoundFile container
 let soundtrack;
 
+/**
+ * I draw this sketch sound indicator.
+ * 
+ * Returns:
+ *  undefined.
+ */
+function drawSoundIndicator()
+{
+    // push transformation matrix
+    push();
+
+    // translate to bottom right corner
+    translate((WIDTH / 2) - 50, (HEIGHT / 2) - 50);
+
+    // set indicator transparency
+    soundOn ? tint(255, 100) : tint(255, 255);
+
+    // draw image
+    image(keyboard, 0, 0, 50, 50);
+
+    // pop transformation matrix
+    pop();
+}
+
 /**
 * p5.js preload callback.
 *
 * Returns:
 *   undefined;
 */
-function preload() {
-  // load soundtrack song
-  soundtrack = loadSound('assets/audio/da_beat-nr1.mp3');
+function preload() 
+{  
+    // load soundtrack song
+    soundtrack = loadSound('assets/audio/da_beat-nr1.mp3');
+
+    // load keyboard on image
+    keyboard = loadImage('assets/images/keyboard.png');
+}
+
+/**
+ * p5.js mouse clicked callback.
+ * 
+ * Returns:
+ *  undefined.
+ */
+function mouseClicked()
+{
+    // soundtrack icon was clicked: update soundtrack state
+    if(mouseX > WIDTH - 50  && mouseX < WIDTH && mouseY > HEIGHT - 50 && mouseY < HEIGHT)
+    {
+        soundOn = !soundOn;
+        soundOn ? soundtrack.loop() : soundtrack.stop();
+    }
 }
 
 /**
@@ -33,9 +80,6 @@ function setup()
     // create canvas and set renderer as WEBGL
     createCanvas(WIDTH, HEIGHT, WEBGL);
 
-    // play soundtrack in a loop
-    soundtrack.loop();
-
     // setup terrain
     terrain = new Terrain(WIDTH + WIDTH_OFFSET, HEIGHT + HEIGHT, RESOLUTION);
     terrain.setup();
@@ -57,4 +101,7 @@ function draw()
 
     // draw terrain
     terrain.render();
+
+    // draw soundtrack indicator
+    drawSoundIndicator();
 }