add fading effect like in a cinema. sped start and end color are selectable in json file

rename loop effects to more meaningfull names


Former-commit-id: bed033e19d7cb38b0d5f11313a9f927ac8121194

effects/fade.py

@@ -0,0 +1,34 @@
+import hyperion, time
+
+def setColor(rgb):
+	hyperion.setColor( bytearray( hyperion.ledCount * rgb))
+
+# Get the parameters
+fadeTime   = float(hyperion.args.get('fade-time', 5.0))
+colorStart = hyperion.args.get('color-start', (255,174,11))
+colorEnd   = hyperion.args.get('color-end', (100,100,100))
+
+color_step = (
+	(colorEnd[0] - colorStart[0]) / 256.0,
+	(colorEnd[1] - colorStart[1]) / 256.0,
+	(colorEnd[2] - colorStart[2]) / 256.0
+)
+
+# fade color
+for step in range(256):
+	if hyperion.abort():
+		break
+
+	setColor( (
+		int( min(max(0, colorStart[0] + color_step[0]*step), 255) ),
+		int( min(max(0, colorStart[1] + color_step[1]*step), 255) ),
+		int( min(max(0, colorStart[2] + color_step[2]*step), 255) )
+	) )
+
+	time.sleep( fadeTime / 256 )
+
+# maintain color until effect end
+setColor(colorEnd)
+while not hyperion.abort():
+	time.sleep(1)
+