/traderous

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  • Committer: Josh C
  • Date: 2013-06-23 02:06:35 UTC
  • Revision ID: josh@9ix.org-20130623020635-31ov2mbrb67xe0h0
more mirror cleanup

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main.lua
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                  return -1
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               end
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            end,
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   shortestVector = function(from, to)
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                       if STRICT then
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                          if from.x < the.app.width / 2 or
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                             from.x > the.bg.width - the.app.width / 2 or
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                             from.y < the.app.height / 2 or
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                             from.y > the.bg.height - the.app.height / 2 then
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                             error('"from" coordinate out of bounds: X='..from.x..' Y='..from.y)
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                          end
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                          if to.x < the.app.width / 2 or
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                             to.x > the.bg.width - the.app.width / 2 or
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                             to.y < the.app.height / 2 or
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                             to.y > the.bg.height - the.app.height / 2 then
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                             error('"to" coordinate out of bounds: X='..to.x..' Y='..to.y)
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                          end
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                       end
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                       -- normalize grid to account for mirror zones
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                       local fx = from.x - the.app.width / 2
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                       local fy = from.y - the.app.height / 2
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                       local tx = to.x - the.app.width / 2
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                       local ty = to.y - the.app.height / 2
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                       local short = {}
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                       -- pick shorter x
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                       if math.abs(tx - fx) < math.abs(tx - fx - (the.bg.width - the.app.width)) then
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                          -- straight path is shorter
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                          short.x = tx - fx
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                       else
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                          short.x = tx - fx - (the.bg.width - the.app.width)
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                       end
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                       -- pick shorter y
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                       if math.abs(ty - fy) < math.abs(ty - fy - (the.bg.height - the.app.height)) then
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                          -- straight path is shorter
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                          short.y = ty - fy
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                       else
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                          short.y = ty - fy - (the.bg.height - the.app.height)
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                       end
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                       return vector.new(short.x, short.y)
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                    end
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}
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GameView = View:extend {