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  • Committer: Josh C
  • Date: 2013-12-15 19:47:43 UTC
  • Revision ID: josh@9ix.org-20131215194743-ye0rbul4qruqau4g
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util.lua
 
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util = {
 
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   dim = function(dir)
 
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      if dir == 'x' then
 
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         return 'width'
 
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      elseif dir == 'y' then
 
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         return 'height'
 
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      else
 
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         if STRICT then error('dir '..dir) end
 
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      end
 
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   end,
 
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   dirToXY = function(dir)
 
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                if dir == 'up' or dir == 'down' then
 
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                   return 'y'
 
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                elseif dir == 'left' or dir == 'right' then
 
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                   return 'x'
 
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                else
 
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                   error('bad direction')
 
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                end
 
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             end,
 
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   dirToPosNeg = function(dir)
 
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                    if dir == 'up' or dir == 'left' then
 
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                       return -1
 
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                    elseif dir == 'down' or dir == 'right' then
 
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                       return 1
 
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                    else
 
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                       error('bad direction')
 
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                    end
 
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                 end
 
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}