add drag and drop, parse lines more robustly

cities.lua

@@ -51,6 +51,7 @@ function t.load( filename )
   for line in assert( lfs.lines( filename ), "Error: could not open cities.dat" ) do
 
     local _, _, x, y, pop, capital = line:sub( 83 ):find( "(%g+)%s+(%g+)%s+(%g+)%s+(%g+)" )
+    if capital then --check against empty or malformed line
       x, y, pop, capital = tonumber( x ), tonumber( y ), tonumber( pop ), ( tonumber( capital ) > 0)
       local city = {
         name = line:sub( 1, 39 ):gsub("%s+$",""),
@@ -67,6 +68,9 @@ function t.load( filename )
         caps[idxCaps], caps[idxCaps + 1] = x, y
         idxCaps = idxCaps + 2
       end
+    else
+      print( "CITIES: malformed line:", line )
+    end
   end
 
   --Multiple inheritance.

lines.lua

@@ -9,18 +9,27 @@ function t.load( filename )
   local n = 0
   local k = 1
   for line in assert( lfs.lines( filename ) ) do
-    if line == "b" then
+    if line:find "b" then
       k = 1
-      n = n + 1
+      if #poly > 2 then n = n + 1 end
       poly = {}
       polys[n] = poly
     else
       local _, _, x, y = line:find( "(%g+)%s+(%g+)" )
-      x, y = assert( tonumber( x ) ), assert( tonumber( y ) )
+      x, y = tonumber( x ), tonumber( y )
+      if x and y then 
         poly[k], poly[ k + 1 ] = x, y
         k = k + 2
+      else
+        print( "LINES: malformed line:", filename, line )
       end
     end
+  end
+  
+  if not polys[n] or (#(polys[n]) < 3) then
+    polys[n] = nil
+    n = n - 1
+  end
 
   print( "LOADED", filename, n )
   return setmetatable( polys, {__index = t } )

main.lua

@@ -1,4 +1,5 @@
 local love = assert( love, "This tool requires LOVE: love2d.org" )
+--assert( require('mobdebug') ).start() --remote debugger
 local map = require 'map'
 local button = require 'button'
 local SAVEDIRECTORY = "out/"
@@ -11,12 +12,16 @@ function love.load()
   lfs.setIdentity( "dcearth", false )
   assert( lfs.createDirectory( SAVEDIRECTORY.."data/earth" ))
   assert( lfs.createDirectory( SAVEDIRECTORY.."data/graphics" ))
-  map.load()
 
 
   love.graphics.setNewFont( 12, "mono" )
 end
 
+function love.directorydropped( path )
+  love.filesystem.mount( path, "" )
+  return map.load( path )
+end
+
 function love.update( dt )
   local tx, ty = 0, 0
   local moveCamera = false
@@ -57,6 +62,10 @@ local layerButtons = {
 
 
 function love.draw()
+  if not map.loaded then
+    return love.graphics.print( "Drag and drop folder to begin.")
+  end
+  
   love.graphics.push( "all" )
   map.draw()
   love.graphics.pop()
@@ -85,7 +94,7 @@ function love.draw()
 
   --Edit box.
   love.graphics.rectangle( "line", love.graphics.getWidth() / 2, h, love.graphics.getWidth() / 2, 30 )
-  if map.cities.selected then
+  if map.loaded and map.cities.selected then
     local c = map.cities.selected
     love.graphics.setColor( 0.2, 0.1, 0.1, 0.5 )
     love.graphics.rectangle( "fill", 0, 0, 150 ,100 )    
@@ -93,7 +102,7 @@ function love.draw()
     love.graphics.rectangle( "line", 0, 0, 150 ,100 )   
     love.graphics.setColor( 1.2, 1.1, 1.1, 1.5 )
     love.graphics.print( ("NAME: %s\nX: %3.2f\nY: %3.2f\nPOP: %d\nCAPITAL: %s\nCOUNTRY: %s"):format(c.name, c.x, c.y, c.pop, tostring(c.capital), c.country), 0, 0 )
-  elseif map.travelnodes.selected then
+  elseif map.loaded and map.travelnodes.selected then
     local c = map.travelnodes.selected
     love.graphics.setColor( 0.2, 0.1, 0.1, 0.5 )
     love.graphics.rectangle( "fill", 0, 0, 150 ,100 )    
@@ -101,7 +110,7 @@ function love.draw()
     love.graphics.rectangle( "line", 0, 0, 150 ,100 )   
     love.graphics.setColor( 1.2, 1.1, 1.1, 1.5 )
     love.graphics.print( ("Node: %d\nX: %3.2f\nY: %3.2f\n"):format(c.number, c.x, c.y) )
-  elseif map.ainodes.selectedNode then
+  elseif map.loaded and map.ainodes.selectedNode then
     local c = map.ainodes.selected
     love.graphics.setColor( 0.2, 0.1, 0.1, 0.5 )
     love.graphics.rectangle( "fill", 0, 0, 150 ,100 )    
@@ -122,16 +131,18 @@ end
 
 function love.mousepressed( x, y, button, istouch, presses )
   local wx, wy = Camera.GetWorldCoordinate( x, y )
+  if map.loaded then
     if button == 1 then
       map.cities.lockSelection()
     else
       map.cities.unlockSelection()
     end
+  end
   print( ("MOUSE\tx %f\ty %f\twx %f\twy %f"):format(x, y, wx, wy) )
 end
 
 function love.mousemoved( x, y, dx, dy, istouch )
-  map.cities.selectNearestCity( Camera.GetWorldCoordinate( x, y ) )
+  if map.loaded and map.cities.visible then map.cities.selectNearestCity( Camera.GetWorldCoordinate( x, y ) ) end
 end
 
 local function ToggleVisibility( layer )
@@ -155,7 +166,9 @@ local layerVisibilityKeybinds = {
   ["8"] = "coastlines",
   ["9"] = "coastlinesLow",
   ["0"] = "international",
-  ["-"] = "cities"
+  ["-"] = "cities",
+  ["="] = "travelnodes",
+  ["backspace"] = "ainodes",
 }
 
 function love.keypressed(key)

map.lua

@@ -8,6 +8,7 @@ local Camera = require 'camera'
 local Territory = require 'territory'
 
 local map = {
+  loaded = false,
   coastlines = false,
   coastlinesLow = false,
   international = false,
@@ -21,11 +22,11 @@ local map = {
   },
   travelnodes = false,
   sailable = false,
-  aimarkers = false,
+  ainodes = false,
   cities = false
 }
 
-function map.load()
+function map.load( )
   map.cities = Cities.load( "data/earth/cities.dat" )
   map.coastlines = Lines.load( "data/earth/coastlines.dat" )
   map.coastlinesLow = Lines.load( "data/earth/coastlines-low.dat" )
@@ -36,10 +37,12 @@ function map.load()
   for k, v in pairs(map.territory) do
     map.territory[k] = Territory.load( "data/earth/"..k..".bmp", k )
   end
+  map.loaded = true
 end
 
 function map.draw()
   lg.clear( 0, 0, 0, 1 )
+  if not map.loaded then return end
 
   do --territory
     lg.setColor( 1,1,1,1)
@@ -55,13 +58,9 @@ function map.draw()
         v:drawBorder( "sea" )
       end
     end
-    if map.sailable.visible then map.sailable:draw() end
+    if map.sailable.visible then 
-    lg.setBlendMode( "alpha" )
+      map.sailable:draw()
 
-    lg.setColor( 1, 1, 1, 1 )
-  end
-  
-  do --borders
       lg.setLineJoin( "none" )
       lg.setLineWidth( 1 / Camera.zoom )
 
@@ -71,7 +70,10 @@ function map.draw()
       lg.setLineWidth( 3 / Camera.zoom )
       map.sailable:drawBorder( "placeable" )
     end
+    lg.setBlendMode( "alpha" )
 
+    lg.setColor( 1, 1, 1, 1 )
+  end
 
   do --all this stuff is drawn in world coordinates, ( -180, 180 ) x ( -100, 100 )
 
@@ -90,7 +92,7 @@ function map.draw()
       lg.setColor( 1, 1, 1, 0.5 )
       map.cities.drawSelected( 15.0 / Camera.zoom )
 
-      map.ainodes:draw()
+      if map.ainodes.visible then map.ainodes:draw() end
     end
 
     do  --line stuff
@@ -115,8 +117,10 @@ function map.draw()
 
     do --travel nodes
       lg.replaceTransform( Camera.tfNodes )
+      if map.travelnodes.visible then
         map.travelnodes:draw()
       end
+    end
 
   end