Difference between revisions of "Activities/Turtle in a Pond"

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==Turtle in a Pond Activity==
 
==Turtle in a Pond Activity==
  
Turtle in a Pond is a strategy game. The goal is to surround the turtle before it runs of the screen.
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Read at https://help.sugarlabs.org/turtle_in_a_pond.html
  
[[File:Turtle-in-a-pond.png|300px]]
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The source file has been moved to [https://github.com/godiard/help-activity/blob/master/source/turtle_in_a_pond.rst GitHub]
 
 
=== How to play Turtle in a Pond ===
 
 
 
Did you know that:
 
* You can load your own strategy for the turtle
 
 
 
==== The Toolbars ====
 
 
 
[[Image:TurtlePond_toolbar-1.png]]
 
 
 
:from left to right
 
# the Activity toolbar button
 
# the New Game button
 
# the Load new strategy button
 
# the Reload the default strategy button
 
# the Stop button
 
 
 
=== Strategy ===
 
 
 
The default strategy is simple: choose a random direction and go there if the dot is open.
 
 
 
<pre>
 
def _turtle_strategy(self, turtle):
 
    c = turtle[1] % 2
 
    n = int(uniform(0, 6))
 
    for i in range(6):
 
        col = turtle[0] + CIRCLE[c][(i + n) % 6][0]
 
        row = turtle[1] + CIRCLE[c][(i + n) % 6][1]
 
        if not self._dots[self._grid_to_dot((col, row))].type:
 
            return [col, row]
 
    return turtle
 
</pre>
 
 
 
In this version, the turtle moves down, regardless of whether the dot is open.
 
<pre>
 
def _turtle_strategy(self, turtle):
 
    turtle[1] +=1
 
    return turtle
 
</pre>
 
 
 
In this version, the turtle moves down until it is blocked.
 
<pre>
 
def _turtle_strategy(self, turtle):
 
    if not self._dots[self._grid_to_dot((turtle[0], turtle[1]+1))].type:
 
      turtle[1] +=1
 
    return turtle
 
</pre>
 
 
 
In this version, the turtle will go off the edge if it can.
 
<pre>
 
def _turtle_strategy(self, turtle):
 
    c = turtle[1] % 2
 
    for i in range(6):
 
        col = turtle[0] + CIRCLE[c][i][0]
 
        row = turtle[1] + CIRCLE[c][i][1]
 
        if self._dots[self._grid_to_dot((col, row))].type is None:
 
            return [col, row]
 
 
 
    n = int(uniform(0, 6))
 
    for i in range(6):
 
        col = turtle[0] + CIRCLE[c][(i + n) % 6][0]
 
        row = turtle[1] + CIRCLE[c][(i + n) % 6][1]
 
        if not self._dots[self._grid_to_dot((col, row))].type:
 
            return [col, row]
 
    return turtle
 
</pre>
 
 
 
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.
 
 
 
Your strategy should start with:
 
 
 
def _turtle_strategy(self, turtle):
 
 
 
The turtle argument is a tuple containing the column and row of the current turtle position. That is, turtle[0] is the horizontal position and turtle[1] is the vertical position.
 
 
 
Your strategy should return a tuple containing the column and row of the new turtle position, e.g.,
 
 
 
return [col, row]
 
 
 
There are some resources that you can use in your program, including:
 
 
 
;CIRCLE: a 2x6x2 array of offsets that can used to find the col and row of the dots surrounding the turtle.
 
;self._dots: the array of dots.
 
;self._pressed: the index of the most recent dot pressed by the user
 
 
 
=== Where to get Turtle in a Pond ===
 
 
 
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]
 
 
 
The source code is available on [http://git.sugarlabs.org/turtlepond the Sugar Labs Gitorious server].
 
 
 
[[Category:Activity]]
 

Latest revision as of 00:07, 28 June 2018

Turtle in a Pond Activity

Read at https://help.sugarlabs.org/turtle_in_a_pond.html

The source file has been moved to GitHub