Mood blobs effect added

Former-commit-id: 4bae584f7fa0c688573ad6051458f99954ded686

effects/mood-blobs.py

@@ -0,0 +1,63 @@
+import hyperion
+import time
+import colorsys
+import math
+
+# Get the parameters
+rotationTime = hyperion.args.get('rotationTime', 20.0)
+color = hyperion.args.get('color', (0,0,255))
+hueChange = hyperion.args.get('hueChange', 60.0) / 360.0
+blobs = hyperion.args.get('blobs', 5)
+reverse = hyperion.args.get('reverse', False)
+print color
+print hyperion.args
+
+# Check parameters
+rotationTime = max(0.1, rotationTime)
+hueChange = max(0.0, min(abs(hueChange), .5))
+blobs = max(1, blobs)
+
+# Calculate the color data
+baseHsv = colorsys.rgb_to_hsv(color[0]/255.0, color[1]/255.0, color[2]/255.0)
+colorData = bytearray()
+for i in range(hyperion.ledCount):
+	hue = (baseHsv[0] + hueChange * math.sin(2*math.pi * i / hyperion.ledCount)) % 1.0
+	rgb = colorsys.hsv_to_rgb(hue, baseHsv[1], baseHsv[2])
+	colorData += bytearray((int(255*rgb[0]), int(255*rgb[1]), int(255*rgb[2])))
+
+# Calculate the increments
+sleepTime = 0.1
+amplitudePhaseIncrement = blobs * math.pi * sleepTime / rotationTime
+colorDataIncrement = 3
+
+# Switch direction if needed
+if reverse:
+	amplitudePhaseIncrement = -amplitudePhaseIncrement
+	colorDataIncrement = -colorDataIncrement
+
+# create a Array for the colors
+colors = bytearray(hyperion.ledCount * (0,0,0))
+
+# Start the write data loop
+amplitudePhase = 0.0
+rotateColors = False
+while not hyperion.abort():
+	# Calculate new colors
+	for i in range(hyperion.ledCount):
+		amplitude = max(0.0, math.sin(-amplitudePhase + 2*math.pi * blobs * i / hyperion.ledCount))
+		colors[3*i+0] = int(colorData[3*i+0] * amplitude)
+		colors[3*i+1] = int(colorData[3*i+1] * amplitude)
+		colors[3*i+2] = int(colorData[3*i+2] * amplitude)
+
+	# set colors
+	hyperion.setColor(colors)
+	
+	# increment the phase
+	amplitudePhase = (amplitudePhase + amplitudePhaseIncrement) % (2*math.pi)
+	
+	if rotateColors:
+		colorData = colorData[-colorDataIncrement:] + colorData[:-colorDataIncrement]
+	rotateColors = not rotateColors
+	
+	# sleep for a while
+	time.sleep(sleepTime)