Romansimplex.lua

HersheyRomanSimplex = class()

-- The Hershey Fonts were originally created by Dr.
-- A. V. Hershey while working at the
-- U. S. National Bureau of Standards.

-- Useful Links:
-- http://emergent.unpythonic.net/software/hershey
-- http://paulbourke.net/dataformats/hershey/

-- Re-encoding of font information and other shenanigans
-- by Tom Bortels bortels@gmail.com November 2011
-- all rights reversed (Hail Eris!)

-- "If I have seen a little further it is by standing
-- on the shoulders of Giants."
-- Isaac Newton

function HersheyRomanSimplex:init()
   -- font data - 2 decimal character # of points,
   -- followed by 2*points of point data
   -- 9->-9, 8-<-8, ... 1->-1, 0->0, A->1, B->2, ... Z->26
   self.code = "9876543210ABCDEFGHIJKLMNOPQRSTUVWXYZ"
   -- this is the Hershey Roman Simplex font for ascii 32-127
   self.fontdata =
      "00160810EUEG11EBDAE0FAEB0516DUDN11LULN1121KYD711QYJ711DLRL11"
   .. "CFQF2620HYH411LYL411QROTLUHUETCRCPDNEMGLMJOIPHQFQCOAL0H0EACC"
   .. "3124UUC011HUJSJQIOGNENCPCRDTFUHUJTMSPSSTUU11QGOFNDNBP0R0TAUC"
   .. "UESGQG3426WLWMVNUNTMSKQFOCMAK0G0EADBCDCFDHEILMMNNPNRMTKUITHR"
   .. "HPIMKJPCRAT0V0WAWB0710ESDTEUFTFREPDO1014KYIWGTEPDKDGEBG2I5K7"
   .. "1014CYEWGTIPJKJGIBG2E5C70816HUHI11CRML11MRCL0526MRM011DIVI08"
   .. "10FAE0DAEBFAF1E3D40226DIVI0510EBDAE0FAEB0222TYB71720IUFTDQCL"
   .. "CIDDFAI0K0NAPDQIQLPQNTKUIU0420FQHRKUK01420DPDQESFTHULUNTOSPQ"
   .. "POOMMJC0Q01520EUPUJMMMOLPKQHQFPCNAK0H0EADBCD0620MUCGRG11MUM0"
   .. "1720OUEUDLEMHNKNNMPKQHQFPCNAK0H0EADBCD2320PROTLUJUGTEQDLDGEC"
   .. "GAJ0K0NAPCQFQGPJNLKMJMGLEJDG0520QUG011CUQU2920HUETDRDPENGMKL"
   .. "NKPIQGQDPBOAL0H0EADBCDCGDIFKILMMONPPPROTLUHU2320PNOKMIJHIHFI"
   .. "DKCNCODRFTIUJUMTORPNPIODMAJ0H0EADC1110ENDMELFMEN11EBDAE0FAEB"
   .. "1410ENDMELFMEN11FAE0DAEBFAF1E3D40324TRDIT00526DLVL11DFVF0324"
   .. "DRTID02018CPCQDSETGUKUMTNSOQOONMMLIJIG11IBHAI0JAIB5527RMQOOP"
   .. "LPJOINHKHHIFKENEPFQH11LPJNIKIHJFKE11RPQHQFSEUEWGXJXLWOVQTSRT"
   .. "OULUITGSEQDOCLCIDFEDGBIAL0O0RATBUC11SPRHRFSE0818IUA011IUQ011"
   .. "DGNG2321DUD011DUMUPTQSRQROQMPLMK11DKMKPJQIRGRDQBPAM0D01821RP"
   .. "QROTMUIUGTERDPCMCHDEECGAI0M0OAQCRE1521DUD011DUKUNTPRQPRMRHQE"
   .. "PCNAK0D01119DUD011DUQU11DKLK11D0Q00818DUD011DUQU11DKLK2221RP"
   .. "QROTMUIUGTERDPCMCHDEECGAI0M0OAQCRERH11MHRH0822DUD011RUR011DK"
   .. "RK0208DUD01016LULEKBJAH0F0DACBBEBG0821DUD011RUDG11ILR00517DU"
   .. "D011D0P01124DUD011DUL011TUL011TUT00822DUD011DUR011RUR02122IU"
   .. "GTERDPCMCHDEECGAI0M0OAQCRESHSMRPQROTMUIU1321DUD011DUMUPTQSRQ"
   .. "RNQLPKMJDJ2422IUGTERDPCMCHDEECGAI0M0OAQCRESHSMRPQROTMUIU11LD"
   .. "R21621DUD011DUMUPTQSRQROQMPLMKDK11KKR02020QROTLUHUETCRCPDNEM"
   .. "GLMJOIPHQFQCOAL0H0EACC0516HUH011AUOU1022DUDFECGAJ0L0OAQCRFRU"
   .. "0518AUI011QUI01124BUG011LUG011LUQ011VUQ00520CUQ011QUC00618AU"
   .. "IKI011QUIK0820QUC011CUQU11C0Q01114DYD711EYE711DYKY11D7K70214"
   .. "0UN31114IYI711JYJ711CYJY11C7J71016FOHRJO11CLHQML11HQH0021602"
   .. "P20710FUETDRDPEOFPEQ1719ONO011OKMMKNHNFMDKCHCFDCFAH0K0MAOC17"
   .. "19DUD011DKFMHNKNMMOKPHPFOCMAK0H0FADC1418OKMMKNHNFMDKCHCFDCFA"
   .. "H0K0MAOC1719OUO011OKMMKNHNFMDKCHCFDCFAH0K0MAOC1718CHOHOJNLMM"
   .. "KNHNFMDKCHCFDCFAH0K0MAOC0812JUHUFTEQE011BNIN2219ONO2N5M6K7H7"
   .. "F611OKMMKNHNFMDKCHCFDCFAH0K0MAOC1019DUD011DJGMINLNNMOJO00808"
   .. "CUDTEUDVCU11DND01110EUFTGUFVEU11FNF3E6C7A70817DUD011NNDD11HH"
   .. "O00208DUD01830DND011DJGMINLNNMOJO011OJRMTNWNYMZJZ01019DND011"
   .. "DJGMINLNNMOJO01719HNFMDKCHCFDCFAH0K0MAOCPFPHOKMMKNHN1719DND7"
   .. "11DKFMHNKNMMOKPHPFOCMAK0H0FADC1719ONO711OKMMKNHNFMDKCHCFDCFA"
   .. "H0K0MAOC0813DND011DHEKGMINLN1717NKMMJNGNDMCKDIFHKGMFNDNCMAJ0"
   .. "G0DACC0812EUEDFAH0J011BNIN1019DNDDEAG0J0LAOD11ONO00516BNH011"
   .. "NNH01122CNG011KNG011KNO011SNO00517CNN011NNC00916BNH011NNH0F4"
   .. "D6B7A70817NNC011CNNN11C0N03914IYGXFWEUESFQGPHNHLFJ11GXFVFTGR"
   .. "HQIOIMHKDIHGIEICHAG0F2F4G611FHHFHDGBFAE1E3F5G6I70208DYD73914"
   .. "EYGXHWIUISHQGPFNFLHJ11GXHVHTGRFQEOEMFKJIFGEEECFAG0H2H4G611HH"
   .. "FFFDGBHAI1I3H5G6E72324CFCHDKFLHLJKNHPGRGTHUJ11CHDJFKHKJJNGPF"
   .. "RFTGUJUL"

   local i=1
   local c=32
   self.font = {}
   while (i < string.len(self.fontdata)) do
      local cs = string.char(c)
      self.font[cs] = {}
      local points = string.sub(self.fontdata, i, i+1)
      self.font[cs].points = points
      self.font[cs].char = cs
      self.font[cs].ascii = c
      self.font[cs].width = string.sub(self.fontdata, i+2, i+3)
       i=i+4
      self.font[cs].data = string.sub(self.fontdata, i, i+points*2)
      i = i + points*2
      c = c + 1
   end
   i=-9
   self.decode = {}
   for c in self.code:gmatch"." do 
      self.decode[c]=i
      i=i+1
   end

   -- label support
   self.labels = {}
   
end

function HersheyRomanSimplex:addlabel(txt, x, y, size, rot, color)
   if type(txt) == "table" then
      local proto = { txt="UNDEFINED", x=0, y=0, size=1, rot=0, color={ 255, 255, 255, 255 } }
      local k, v
      for k,v in pairs(txt) do proto[k] = v end
      table.insert(self.labels, proto)
   else
      txt = txt or "demo"
      x = x or WIDTH/2
      y = y or HEIGHT/2
      size = size or 1
      rot = rot or 0
      color = color or { 255, 255, 255, 255 }
      table.insert(self.labels, { txt=txt, x=x, y=y, size=size, rot=rot, color=color } )
   end
   return self.labels[# self.labels]
end

function HersheyRomanSimplex:drawlabel(l)
   if (l.skip) then return end
   pushMatrix()
   translate(l.x, l.y)
   rotate(l.rot)
   stroke(unpack(l.color))
   self:drawstring(l.txt, 0, 0, l.size)
   popMatrix()
end

function HersheyRomanSimplex:draw()
   local k, v
   for k, v in pairs(self.labels) do
      self:drawlabel(v)
   end
end
   
function HersheyRomanSimplex:stringwidth(s, sc)
    sc = sc or 1
    local x, l, i = 0, string.len(s)
    for i=1, l do
        x = x + (self.font[s:sub(i, i)].width * sc)
    end
    return x
end

function HersheyRomanSimplex:drawstring(s, x, y, sc)
   sc = sc or 1
    local ox=x
   local l, i
   l = string.len(s)
   for i = 1, l do
      local c = s:sub(i, i)
      local w = self.font[c].width 
--      if ((x + w) >= 0) then
--         x = x + (self:drawchar(c, x, y, sc))
--      else
--         x = x + w * sc
--      end
--   if (x > WIDTH) then break end -- skip offscreen
      if ((x+w) <0) or (x > WIDTH) then
         x = x + w * sc
      else
         x = x + (self:drawchar(c, x, y, sc))
      end
   end
   return x - ox
end

function HersheyRomanSimplex:drawchar(c, x, y, sc)
   sc = sc or 1
   local ax, ay, bx, by, minx, maxx = -1, -1, -1, -1, -1, -1
   local p, plot
   local ch = self.font[c]
   for p=1, ch.points do
      ax=bx
      ay=by
      bx=self.decode[ch.data:sub(p*2-1, p*2-1)]
      by=self.decode[ch.data:sub(p*2, p*2)]
      plot=true
      if ((ax==-1) and (ay==-1)) then plot=false end
      if ((bx==-1) and (by==-1)) then plot=false end
      if (plot) then  
         line(x+ax*sc, y+ay*sc, x+bx*sc, y+by*sc)
      end
   end
   return ch.width * sc -- for drawstring
end