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You have completed C# Objects!
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Now you try. Write a class on your own, then we'll walk through it together.
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We need to be able to specify where on
the map a tower or an invader is located.
0:00
We can think of our map as being
divided up into a two-dimensional grid.
0:01
Each grid square is a location where
an object can be placed on the map.
0:05
This allows us to use Cartesian
coordinates to identify grid squares.
0:10
Cartesian coordinates are used to identify
a point on a two-dimensional grid.
0:15
Traditionally variables named X and
Y are used to specify a point.
0:20
X is the distance from
the left-most grid square.
0:26
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