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| ==Turtle in a Pond Activity== | | ==Turtle in a Pond Activity== |
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| Turtle in a Pond is a strategy game. The goal is to surround the turtle before it runs of the screen.
| | Read at https://help.sugarlabs.org/turtle_in_a_pond.html |
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| [[File:Turtle-in-a-pond.png|300px]]
| | The source file has been moved to [https://github.com/godiard/help-activity/blob/master/source/turtle_in_a_pond.rst GitHub] |
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| === How to play Turtle in a Pond ===
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| Did you know that:
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| * You can load your own strategy for the turtle
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| ==== The Toolbars ====
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| [[Image:TurtlePond_toolbar-1.png]]
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| :from left to right
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| # the Activity toolbar button
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| # the New Game button
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| # the Load new strategy button
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| # the Reload the default strategy button
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| # the Stop button
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| === Strategy ===
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| The default strategy is simple: choose a random direction and go there if the dot is open.
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| <pre>
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| def _turtle_strategy(self, turtle):
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| c = turtle[1] % 2
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| n = int(uniform(0, 6))
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| for i in range(6):
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| col = turtle[0] + CIRCLE[c][(i + n) % 6][0]
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| row = turtle[1] + CIRCLE[c][(i + n) % 6][1]
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| if not self._dots[self._grid_to_dot((col, row))].type:
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| return [col, row]
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| return turtle
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| </pre>
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| In this version, the turtle moves down, regardless of whether the dot is open.
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| <pre>
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| def _turtle_strategy(self, turtle):
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| turtle[1] +=1
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| return turtle
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| </pre>
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| In this version, the turtle will go off the edge if it can.
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| <pre>
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| def _turtle_strategy(self, turtle):
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| c = turtle[1] % 2
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| for i in range(6):
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| col = turtle[0] + CIRCLE[c][i][0]
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| row = turtle[1] + CIRCLE[c][i][1]
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| if self._dots[self._grid_to_dot((col, row))].type is None:
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| return [col, row]
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| n = int(uniform(0, 6))
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| for i in range(6):
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| col = turtle[0] + CIRCLE[c][(i + n) % 6][0]
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| row = turtle[1] + CIRCLE[c][(i + n) % 6][1]
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| if not self._dots[self._grid_to_dot((col, row))].type:
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| return [col, row]
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| return turtle
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| </pre>
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| The dots are stored in a 13x13 array. Each dot has an attribute, 'type', that determines it status. The edges have a type=None. Occupied dots have a type=True. Unoccupied dots have a type=False.
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| Your strategy should start with:
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| def _turtle_strategy(self, turtle):
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| The turtle argument is a tuple containing the column and row of the current turtle position.
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| Your strategy should return a tuple containing the column and row of the new turtle position, e.g.,
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| return [col, row]
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| There are some resources that you can use in your program, including:
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| ;CIRCLE: an array of offsets that can used to find the col and row of the dots surrounding the turtle.
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| ;self._dots: the array of dots.
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| ;self._pressed: the index of the most recent dot pressed by the user
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| === Where to get Turtle in a Pond ===
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| The Turtle in a Pond activity is available for download from the [http://activities.sugarlabs.org Sugar activity portal]: [http://activities.sugarlabs.org/en-US/sugar/addon/4516 Turtle in a Pond]
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| The source code is available on [http://git.sugarlabs.org/turtlepond the Sugar Labs Gitorious server].
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| [[Category:Activity]]
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