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voxel.lua

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Jun 5th, 2018
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  1. local raw = require("rawio")
  2.  
  3. local voxel = {}
  4.  
  5. local defaultPalette = {
  6. 0x00000000, 0xffffffff, 0xffccffff, 0xff99ffff, 0xff66ffff, 0xff33ffff, 0xff00ffff, 0xffffccff, 0xffccccff, 0xff99ccff, 0xff66ccff, 0xff33ccff, 0xff00ccff, 0xffff99ff, 0xffcc99ff, 0xff9999ff,
  7. 0xff6699ff, 0xff3399ff, 0xff0099ff, 0xffff66ff, 0xffcc66ff, 0xff9966ff, 0xff6666ff, 0xff3366ff, 0xff0066ff, 0xffff33ff, 0xffcc33ff, 0xff9933ff, 0xff6633ff, 0xff3333ff, 0xff0033ff, 0xffff00ff,
  8. 0xffcc00ff, 0xff9900ff, 0xff6600ff, 0xff3300ff, 0xff0000ff, 0xffffffcc, 0xffccffcc, 0xff99ffcc, 0xff66ffcc, 0xff33ffcc, 0xff00ffcc, 0xffffcccc, 0xffcccccc, 0xff99cccc, 0xff66cccc, 0xff33cccc,
  9. 0xff00cccc, 0xffff99cc, 0xffcc99cc, 0xff9999cc, 0xff6699cc, 0xff3399cc, 0xff0099cc, 0xffff66cc, 0xffcc66cc, 0xff9966cc, 0xff6666cc, 0xff3366cc, 0xff0066cc, 0xffff33cc, 0xffcc33cc, 0xff9933cc,
  10. 0xff6633cc, 0xff3333cc, 0xff0033cc, 0xffff00cc, 0xffcc00cc, 0xff9900cc, 0xff6600cc, 0xff3300cc, 0xff0000cc, 0xffffff99, 0xffccff99, 0xff99ff99, 0xff66ff99, 0xff33ff99, 0xff00ff99, 0xffffcc99,
  11. 0xffcccc99, 0xff99cc99, 0xff66cc99, 0xff33cc99, 0xff00cc99, 0xffff9999, 0xffcc9999, 0xff999999, 0xff669999, 0xff339999, 0xff009999, 0xffff6699, 0xffcc6699, 0xff996699, 0xff666699, 0xff336699,
  12. 0xff006699, 0xffff3399, 0xffcc3399, 0xff993399, 0xff663399, 0xff333399, 0xff003399, 0xffff0099, 0xffcc0099, 0xff990099, 0xff660099, 0xff330099, 0xff000099, 0xffffff66, 0xffccff66, 0xff99ff66,
  13. 0xff66ff66, 0xff33ff66, 0xff00ff66, 0xffffcc66, 0xffcccc66, 0xff99cc66, 0xff66cc66, 0xff33cc66, 0xff00cc66, 0xffff9966, 0xffcc9966, 0xff999966, 0xff669966, 0xff339966, 0xff009966, 0xffff6666,
  14. 0xffcc6666, 0xff996666, 0xff666666, 0xff336666, 0xff006666, 0xffff3366, 0xffcc3366, 0xff993366, 0xff663366, 0xff333366, 0xff003366, 0xffff0066, 0xffcc0066, 0xff990066, 0xff660066, 0xff330066,
  15. 0xff000066, 0xffffff33, 0xffccff33, 0xff99ff33, 0xff66ff33, 0xff33ff33, 0xff00ff33, 0xffffcc33, 0xffcccc33, 0xff99cc33, 0xff66cc33, 0xff33cc33, 0xff00cc33, 0xffff9933, 0xffcc9933, 0xff999933,
  16. 0xff669933, 0xff339933, 0xff009933, 0xffff6633, 0xffcc6633, 0xff996633, 0xff666633, 0xff336633, 0xff006633, 0xffff3333, 0xffcc3333, 0xff993333, 0xff663333, 0xff333333, 0xff003333, 0xffff0033,
  17. 0xffcc0033, 0xff990033, 0xff660033, 0xff330033, 0xff000033, 0xffffff00, 0xffccff00, 0xff99ff00, 0xff66ff00, 0xff33ff00, 0xff00ff00, 0xffffcc00, 0xffcccc00, 0xff99cc00, 0xff66cc00, 0xff33cc00,
  18. 0xff00cc00, 0xffff9900, 0xffcc9900, 0xff999900, 0xff669900, 0xff339900, 0xff009900, 0xffff6600, 0xffcc6600, 0xff996600, 0xff666600, 0xff336600, 0xff006600, 0xffff3300, 0xffcc3300, 0xff993300,
  19. 0xff663300, 0xff333300, 0xff003300, 0xffff0000, 0xffcc0000, 0xff990000, 0xff660000, 0xff330000, 0xff0000ee, 0xff0000dd, 0xff0000bb, 0xff0000aa, 0xff000088, 0xff000077, 0xff000055, 0xff000044,
  20. 0xff000022, 0xff000011, 0xff00ee00, 0xff00dd00, 0xff00bb00, 0xff00aa00, 0xff008800, 0xff007700, 0xff005500, 0xff004400, 0xff002200, 0xff001100, 0xffee0000, 0xffdd0000, 0xffbb0000, 0xffaa0000,
  21. 0xff880000, 0xff770000, 0xff550000, 0xff440000, 0xff220000, 0xff110000, 0xffeeeeee, 0xffdddddd, 0xffbbbbbb, 0xffaaaaaa, 0xff888888, 0xff777777, 0xff555555, 0xff444444, 0xff222222, 0xff111111
  22. }
  23.  
  24. function voxel.chunk(main, stream)
  25.     local size = {}
  26.     local data = {}
  27.     while stream.hasNext() do
  28.         local chunkId = stream.read(4)
  29.         if chunkId == "PACK" then
  30.             local contentBytes = stream.readInt()
  31.             local childrenBytes = stream.readInt()
  32.             main.numModels = stream.readInt()
  33.         elseif chunkId == "SIZE" then
  34.             local contentBytes = stream.readInt()
  35.             local childrenBytes = stream.readInt()
  36.             local x = stream.readInt()
  37.             local y = stream.readInt()
  38.             local z = stream.readInt()
  39.             size = {x = x, y = y, z = z}
  40.         elseif chunkId == "XYZI" then
  41.             local contentBytes = stream.readInt()
  42.             local childrenBytes = stream.readInt()
  43.             local voxels = stream.readInt()
  44.             main.size = size
  45.             for d = 1, voxels, 1 do
  46.                 local x = stream.readByte()
  47.                 local y = stream.readByte()
  48.                 local z = stream.readByte()
  49.                 local q = stream.readByte()
  50.                 table.insert(main, {x = x, y = y, z = z, i = q})
  51.             end
  52.         elseif chunkId == "RGBA" then
  53.             local contentBytes = stream.readInt()
  54.             local childrenBytes = stream.readInt()
  55.             main.palette = {}
  56.             for i = 1, 256 do
  57.                 local color = {}
  58.                 color.r = stream.readByte()
  59.                 color.g = stream.readByte()
  60.                 color.b = stream.readByte()
  61.                 color.a = stream.readByte()
  62.                 table.insert(main.palette, color)
  63.             end
  64.         elseif chunkId == "MATT" then
  65.  
  66.         end
  67.     end
  68. end
  69.  
  70. function voxel.load(filename)
  71.     local fstream, err = raw.createFileStream(filename, "rb")
  72.     if fstream == nil then
  73.         error(filename .. " " .. err)
  74.     end
  75.     local stream = raw.new(fstream)
  76.     if stream.read(4) ~= "VOX " then
  77.         return nil, filename .. " is not .vox model"
  78.     end
  79.     local model = {}
  80.     model.version = stream.readInt()
  81.     local chunk = stream.read(4)
  82.     if chunk == "MAIN" then
  83.         model= {}
  84.         model.main = {}
  85.         local main = model.main
  86.         main.contentBytes = stream.readInt()
  87.         main.childrenBytes = stream.readInt()
  88.         voxel.chunk(main, stream)
  89.     end
  90.     return model
  91. end
  92.  
  93. return voxel
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