Activities/Turtle Art: Difference between revisions

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 ==Looking under the hood==
-Turtle Art projects are stored as two files: (1) a .ta file contains a [http://docs.python.org/library/json.html json-encoded] serialization of the project; and (2) a .png file of the canvas.
+Turtle Art projects are stored as a .ta file contains a [http://docs.python.org/library/json.html json-encoded] serialization of the project.
 The json encoding of a repeat 4 forward 100 right 90 project:
   [[0,"repeat",331,158,[null,1,2,null]],[1,["number","4"],417,167,[0,null]],[2,"forward",426,207,[0,3,4]],[3,["number","100"],500,216,[2,null]],[4,"right",426,246,[2,5,null]],[5,["number","90"],500,255,[4,null]],[-1,"turtle",0,0,0,0,50,5]]
+The basic structure of the encoding is a list of lists, where each block has these elements:
+# block number
+# block name or [block name, block value]
+# x position (depreciated)
+# y position (depreciated)
+# list of connections to other blocks
+Turtles are encoded at the end of the list:
+# -1
+# turtle or [turtle, turtle name]
+# x position
+# y position
+# heading
+# pen color
+# pen shade
+# pen width
 ==Programmable Brick==