Showing Revision 3 created 05/25/2016 by Udacity Robot.

1. Title:
   Circles - solution
2. Description:

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   So as we saw earlier on, you specify
   the center point of the circle, and
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   then its radius in meters.
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   So here you can say I've set
   the .center of my circle.
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   I just call map.addcircle
   a new circle options.
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   And I set its center to be renton.
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   And renton of course,
   is the latitude and
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   longitude that we created earlier for
   the location of the rank and renton.
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    I set a radius of 5,000,
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    which means a 5 kilometer radius
    around the rank and renton.
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    I've set the stroke color,
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    which is the diameter of the circle will
    be drawn in this color, Color.GREEN.
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    And then I've set using a fill color,
    using Color.argb.
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    And you see I've set the A to be 64,
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    which means it's going to
    be semi transparent.
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    It's going to be slightly translucent.
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    So, we can see the color, the 0, 255,
    0, which is going to be green, but
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    it's a partially transparent green.
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    Now when I run the app, I'll actually
    see the circle projected properly,
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    including taking into account
    the tilt and zoom of the camera.
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    And it will be drawn on
    the surface of the earth.
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    Let's take a look at that.
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    So here you can see it, I have my
    green circle, my semi translucent one.
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    So as I zoom in,
    you'll see that my stroke is green.
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    You'll see that my circle is
    five kilometer radius around
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    the renton ice rink.
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    Because I've colored
    it with translucency,
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    we can actually see through
    to the map underneath.
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    And also because my camera
    is tilted a little bit,
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    we can see that it's
    slightly oval in shape.
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    I'm not looking straight down at
    90 degrees to make it a circle.
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    I'm tilted a little bit, because I'm
    looking somewhat up from the horizon
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    direction, towards the Earth,
    and this part of Seattle.
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    So there we can see it.
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    The circle was added.
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    Pretty straightforward.
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    Pretty simple.
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    Right?
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    Of course if I rotate my map,
    the circle rotates with me.
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    So it's all properly calculated for
    me and all properly drawn
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    as a five kilometer radius circle
    around my home rank and renton.