73 lines
1.6 KiB
Plaintext
73 lines
1.6 KiB
Plaintext
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note
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description: "[
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Used by each {ATTACK_UNIT} to place it at some position on the board.
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This is used for interfacing with a GUI. The position is stored as
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a percentage of the size of the space in which a unit can move (i.e.
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the size of a board).
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]"
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author: "Jimmy J. Johnson"
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class
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VITP_POSITION
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inherit
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POSITION_CONSTANTS
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redefine
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out
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end
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create
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default_create,
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set_xy,
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from_tuple
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convert
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from_tuple ({TUPLE [lat: INTEGER_32; long: INTEGER_32]})
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feature {NONE} -- Initialization
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from_tuple (a_position: TUPLE [long: INTEGER_32; lat: INTEGER_32])
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-- Set Current to `a_position'
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do
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longitude := a_position.long
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latitude := a_position.lat
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end
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feature -- Access
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longitude: INTEGER_32
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-- The position east or west of the logical center (0, 0) of the board.
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latitude: INTEGER_32
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-- The position north or south of the logical center (0,0) of the board.
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out: STRING
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-- String representation of Current
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do
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Result := "(" + longitude.out + ", " + latitude.out + ")"
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end
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feature -- Element change
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set_xy (a_x, a_y: INTEGER_32)
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-- Set the value of x and y
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require
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-- x_big_enough: a_x >= Minimum_longitude
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-- x_small_enough: a_x <= Maximum_longitude
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-- y_big_enough: a_y >= Minimum_latitude
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-- y_small_enough: a_y <= Maximum_latitude
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do
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longitude := a_x
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latitude := a_y
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end
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invariant
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-- longitude_big_enough: longitude >= Minimum_longitude
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-- longitude_small_enough: longitude <= Maximum_longitude
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-- latitude_big_enough: latitude >= Minimum_latitude
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-- latitude_small_enough: latitude <= Maximum_latitude
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end
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