107 lines
2.6 KiB
Lua
107 lines
2.6 KiB
Lua
--Load and save the fixed width plaintext data used by DEFCON.
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local t = {}
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local io = io
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local math = math
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local table = table
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local tonumber = tonumber
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local lfs = love.filesystem
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local lg = love.graphics
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local locationQuery = require 'locationQuery'
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local cities
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local points = {}
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local caps = {}
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t.selected = nil
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t.selectionLocked = false
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function t.lockSelection()
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t.selectionLocked = true
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end
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function t.unlockSelection()
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t.selectionLocked = false
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end
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function t.draw()
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return lg.points( points )
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end
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function t.drawSelected( )
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local c = t.selected
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if not c then return end
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lg.circle( "line", c.x, c.y, 1.0 )
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end
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function t.drawCapitals()
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if cities.visible then lg.points( caps ) end
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end
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function t.selectNearest( cities, x, y )
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return cities:getClosestPoint(x, y) --defer to locationQuery
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end
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local city = {}
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local citymt = {__index = city}
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function city:formatDisplayInfo()
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return (
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[[
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NAME: %s
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COUNTRY: %s
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LONGITUDE: %3.2f
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LATITUDE: %3.2f
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POP: %d
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CAPITAL: %s]]):format( self.name, self.country, self.x, self.y, self.pop, tostring(self.capital) )
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end
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function t.load( filename )
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print( "=== LOADING CITIES. ===" )
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cities = { visible = true, active = false }
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local n = 1
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local idxPts = 1
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local idxCaps = 1
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for line in assert( lfs.lines( filename ), "Error: could not open cities.dat" ) do
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local _, _, x, y, pop, capital = line:sub( 83 ):find( "(%g+)%s+(%g+)%s+(%g+)%s+(%g+)" )
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if capital then --check against empty or malformed line
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x, y, pop, capital = tonumber( x ), tonumber( y ), tonumber( pop ), ( tonumber( capital ) > 0)
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local city = setmetatable({
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name = line:sub( 1, 39 ):gsub("%s+$",""),
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country = line:sub( 42, 82 ):gsub("%s+$",""),
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x = x, y = y, pop = pop, capital = capital
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}, citymt )
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cities[n] = city
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n = n + 1
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points[idxPts], points[idxPts + 1] = x, y
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idxPts = idxPts + 2
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if capital then
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caps[idxCaps], caps[idxCaps + 1] = x, y
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idxCaps = idxCaps + 2
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end
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else
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print( "CITIES: malformed line:", line )
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end
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end
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--Multiple inheritance.
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cities = locationQuery.New( cities )
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setmetatable( getmetatable( cities ).__index, {__index = t } )
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print( "=== CITIES LOADED:", filename, n, "===" )
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return cities
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end
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function t.save( cities, filename )
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local str = {}
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for n, city in ipairs( cities ) do
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str[n] = ("%-40s%-40s%f %f %d %d"):format( city.name, city.country, city.x, city.y, city.pop, city.capital and 1 or 0 )
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end
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assert( lfs.write( filename, table.concat( str, "\n" ) ) )
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print( "Saved", filename )
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end
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return t |