doppler effect sketch

physics/Doppler_Effect/Doppler_Effect.pyde

@@ -0,0 +1,50 @@
+# Represents a single wave emission
+class SoundWave(object):
+    def __init__(self, x, y, speed=1, radius=1):
+        self.x, self.y = x, y
+        self.speed, self.radius = speed, radius
+        
+    def tick(self):
+        self.radius += self.speed
+
+    # Moved into a function to allow fast adjustment of opacity degradation
+    # whilst still observing current opacity from external "garbage collectors"
+    @property
+    def stroke(self):
+        return self.radius * 0.75
+    
+    def render(self):
+        stroke(self.stroke) # Opacity Controls
+        circle(self.x, self.y, self.radius * 2) # diameter
+
+def setup():
+    size(1000, 1000)
+
+    noFill()
+    
+    global sounds, x, y
+    sounds = []
+    x, y = width // 2 - 250, height // 2
+
+i = 0
+XRATE = 2
+def draw():
+    global sounds, XRATE, x, y, i
+    
+    x += XRATE
+    i += 1
+    if i % (15 // XRATE) == 0:
+        sounds.append(SoundWave(x, y, 0.1 + XRATE))
+
+    if i % 200 == 0:
+        sounds = [s for s in sounds if s.stroke < 255]
+
+    if x >= 1300:
+        x = -100
+
+    print(len(sounds))
+
+    background(255)
+    for sound in sounds:
+        sound.tick()
+        sound.render()

physics/Doppler_Effect/sketch.properties

@@ -0,0 +1,2 @@
+mode=Python
+mode.id=jycessing.mode.PythonMode

physics/README.md

@@ -4,4 +4,6 @@
 
 Sketches that simulate physics or physical phenomena in some way or another.
 
-## Sketches
+## Sketches
+
+- **Doppler_Effect** - Simulates the doppler effect with apparent high accuracy.