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/traces.py

@@ -0,0 +1,34 @@
+import hyperion
+import time
+import colorsys
+import random
+
+# Initialize the led data
+ledData = bytearray()
+for i in range(hyperion.ledCount):
+	ledData += bytearray((0,0,0))
+
+sleepTime = float(hyperion.args.get('speed', 1.0)) * 0.004
+
+runners = [
+{ "i":0, "pos":0, "c":0, "step":9 , "lvl":255},
+{ "i":1, "pos":0, "c":0, "step":8 , "lvl":255},
+{ "i":2, "pos":0, "c":0, "step":7 , "lvl":255},
+{ "i":0, "pos":0, "c":0, "step":6 , "lvl":100},
+{ "i":1, "pos":0, "c":0, "step":5 , "lvl":100},
+{ "i":2, "pos":0, "c":0, "step":4, "lvl":100},
+]
+
+# Start the write data loop
+while not hyperion.abort():
+	for r in runners:
+		if r["c"] == 0:
+			#ledData[r["pos"]*3+r["i"]] = 0
+			r["c"] = r["step"]
+			r["pos"] = (r["pos"]+1)%hyperion.ledCount
+			ledData[r["pos"]*3+r["i"]] = int(r["lvl"]*(0.2+0.8*random.random()))
+		else:
+			r["c"] -= 1
+
+	hyperion.setColor(ledData)
+	time.sleep(sleepTime)