handlers/nodeboxes.lua

   1 xdecor.box = {
   2         slab_y = function(height, shift)
   3                 return { -0.5, -0.5+(shift or 0), -0.5, 0.5, -0.5+height+(shift or 0), 0.5 }
   4         end,
   5         slab_z = function(depth)
   6                 return { -0.5, -0.5, -0.5+depth, 0.5, 0.5, 0.5 }
   7         end,
   8         bar_y = function(radius)
   9                 return { -radius, -0.5, -radius, radius, 0.5, radius }
  10         end,
  11         cuboid = function(radius_x, radius_y, radius_z)
  12                 return { -radius_x, -radius_y, -radius_z, radius_x, radius_y, radius_z }
  13         end
  14 }
  15
  16 xdecor.nodebox = {
  17         regular = { type = "regular" },
  18         null = { type = "fixed", fixed = { 0, 0, 0, 0, 0, 0 } }
  19 }
  20
  21 xdecor.pixelbox = function(size, boxes)
  22         local fixed = {}
  23         for _, box in pairs(boxes) do
  24                 -- `unpack` has been changed to `table.unpack` in newest Lua versions.
  25                 local x, y, z, w, h, l = unpack(box)
  26                 fixed[#fixed+1] = {
  27                         (x / size) - 0.5,
  28                         (y / size) - 0.5,
  29                         (z / size) - 0.5,
  30                         ((x + w) / size) - 0.5,
  31                         ((y + h) / size) - 0.5,
  32                         ((z + l) / size) - 0.5
  33                 }
  34         end
  35         return { type = "fixed", fixed = fixed }
  36 end
  37
  38 local mt = {}
  39 mt.__index = function(table, key)
  40         local ref = xdecor.box[key]
  41         local ref_type = type(ref)
  42
  43         if ref_type == "function" then
  44                 return function(...)
  45                         return { type = "fixed", fixed = ref(...) }
  46                 end
  47         elseif ref_type == "table" then
  48                 return { type = "fixed", fixed = ref }
  49         elseif ref_type == "nil" then
  50                 error(key.."could not be found among nodebox presets and functions")
  51         end
  52
  53         error("unexpected datatype "..tostring(type(ref)).." while looking for "..key)
  54 end
  55
  56 setmetatable(xdecor.nodebox, mt)
  57