From faee31c83f7b3054f8660f0de243aa83b00bd4df Mon Sep 17 00:00:00 2001
From: tostadora <tostadora@gmail.com>
Date: Tue, 4 Feb 2014 23:51:11 +0100
Subject: [PATCH 1/3] new effect!

Former-commit-id: e19975e298fd6b11e7012739ac37ee3047d2c184
---
 effects/snake.json | 10 ++++++++++
 effects/snake.py   | 39 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 49 insertions(+)
 create mode 100644 effects/snake.json
 create mode 100644 effects/snake.py

diff --git a/effects/snake.json b/effects/snake.json
new file mode 100644
index 00000000..2c7ba395
--- /dev/null
+++ b/effects/snake.json
@@ -0,0 +1,10 @@
+{
+	"name" : "Snake",
+	"script" : "snake.py",
+	"args" :
+	{
+		"rotation-time" : 10.0,
+		"color" : [255, 0, 0],
+		"percentage" : 25
+	}
+}
diff --git a/effects/snake.py b/effects/snake.py
new file mode 100644
index 00000000..0ee622a6
--- /dev/null
+++ b/effects/snake.py
@@ -0,0 +1,39 @@
+import hyperion
+import time
+import colorsys
+
+# Get the parameters
+rotationTime = float(hyperion.args.get('rotation-time', 10.0))
+color = hyperion.args.get('color', (255,0,0))
+percentage = int(hyperion.args.get('percentage', 10))
+
+# Check parameters
+rotationTime = max(0.1, rotationTime)
+percentage = max(1, min(percentage, 100))
+
+# Initialize the led data
+factor = float(percentage)/100.0
+snakeLeds = int(hyperion.ledCount*factor)
+ledData = bytearray()
+
+for i in range(hyperion.ledCount-snakeLeds):
+	ledData += bytearray((0, 0, 0))
+
+for i in range(1, snakeLeds+1):
+	hsv = colorsys.rgb_to_hsv(float(color[0])/float(255), float(color[1])/float(255), float(color[2])/float(255))
+	rgb = colorsys.hsv_to_rgb(hsv[0], hsv[1], hsv[2]/float(snakeLeds+1-i))
+	ledData += bytearray((int(rgb[0]*255), int(rgb[1]*255), int(rgb[2]*255)))
+
+# Calculate the sleep time and rotation increment
+increment = 3
+sleepTime = rotationTime / hyperion.ledCount
+while sleepTime < 0.05:
+	increment *= 2
+	sleepTime *= 2
+increment %= hyperion.ledCount
+
+# Start the write data loop
+while not hyperion.abort():
+	hyperion.setColor(ledData)
+	ledData = ledData[-increment:] + ledData[:-increment]
+	time.sleep(sleepTime)

From e6ebd6696b843b788e0ed816c148c904dd298149 Mon Sep 17 00:00:00 2001
From: tostadora <tostadora@gmail.com>
Date: Wed, 5 Feb 2014 09:14:42 +0100
Subject: [PATCH 2/3] clear code and change the decrement of value to make it
 even

Former-commit-id: c13cb44cfe48314c087cf6b80257317a38f260ba
---
 effects/snake.py | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/effects/snake.py b/effects/snake.py
index 0ee622a6..c400c775 100644
--- a/effects/snake.py
+++ b/effects/snake.py
@@ -11,17 +11,20 @@ percentage = int(hyperion.args.get('percentage', 10))
 rotationTime = max(0.1, rotationTime)
 percentage = max(1, min(percentage, 100))
 
+# Process parameters
+factor = percentage/100.0
+hsv = colorsys.rgb_to_hsv(color[0]/255.0, color[1]/255.0, color[2]/255.0)
+
 # Initialize the led data
-factor = float(percentage)/100.0
-snakeLeds = int(hyperion.ledCount*factor)
+snakeLeds = max(1, int(hyperion.ledCount*factor))
+decrement = hsv[2]/snakeLeds
 ledData = bytearray()
 
 for i in range(hyperion.ledCount-snakeLeds):
 	ledData += bytearray((0, 0, 0))
 
-for i in range(1, snakeLeds+1):
-	hsv = colorsys.rgb_to_hsv(float(color[0])/float(255), float(color[1])/float(255), float(color[2])/float(255))
-	rgb = colorsys.hsv_to_rgb(hsv[0], hsv[1], hsv[2]/float(snakeLeds+1-i))
+for i in range(snakeLeds):
+	rgb = colorsys.hsv_to_rgb(hsv[0], hsv[1], hsv[2]-(i*decrement))
 	ledData += bytearray((int(rgb[0]*255), int(rgb[1]*255), int(rgb[2]*255)))
 
 # Calculate the sleep time and rotation increment

From b781c4403a6b4d611b38116d169c8aa23369d1b0 Mon Sep 17 00:00:00 2001
From: tostadora <tostadora@gmail.com>
Date: Wed, 5 Feb 2014 19:24:36 +0100
Subject: [PATCH 3/3] back to the old decrement. It had a better effect

Former-commit-id: a00b1c8c84c7846f760e7c0cec7d08949bd6e6b7
---
 effects/snake.py | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/effects/snake.py b/effects/snake.py
index c400c775..2ae5cb37 100644
--- a/effects/snake.py
+++ b/effects/snake.py
@@ -17,14 +17,13 @@ hsv = colorsys.rgb_to_hsv(color[0]/255.0, color[1]/255.0, color[2]/255.0)
 
 # Initialize the led data
 snakeLeds = max(1, int(hyperion.ledCount*factor))
-decrement = hsv[2]/snakeLeds
 ledData = bytearray()
 
 for i in range(hyperion.ledCount-snakeLeds):
 	ledData += bytearray((0, 0, 0))
 
-for i in range(snakeLeds):
-	rgb = colorsys.hsv_to_rgb(hsv[0], hsv[1], hsv[2]-(i*decrement))
+for i in range(1,snakeLeds+1):
+	rgb = colorsys.hsv_to_rgb(hsv[0], hsv[1], hsv[2]/i)
 	ledData += bytearray((int(rgb[0]*255), int(rgb[1]*255), int(rgb[2]*255)))
 
 # Calculate the sleep time and rotation increment
@@ -38,5 +37,5 @@ increment %= hyperion.ledCount
 # Start the write data loop
 while not hyperion.abort():
 	hyperion.setColor(ledData)
-	ledData = ledData[-increment:] + ledData[:-increment]
+	ledData = ledData[increment:] + ledData[:increment]
 	time.sleep(sleepTime)