print3d-holo.lua

local component = require("component")
local shell = require("shell")
local model = require("model")

local args = shell.parse(...)
if #args ~= 1 then
  io.write("Usage: print3d-holo FILE\n")
  os.exit(0)
end

local data, reason = model.Model.load(args[1])
if not data then
  io.stderr:write("Failed loading model: " .. reason .. "\n")
  os.exit(1)
end

if data.label then
  print("Label: " .. data.label)
end
if data.tooltip then
  print("Tooltip: " .. data.tooltip)
end
if data.lightLevel then -- as of OC 1.5.7
  print("Light Level: " .. data.lightLevel)
end
if data.emitRedstone then
  print("Redstone: " .. tostring(data.emitRedstone))
end
if data.buttonMode then
  print("Button mode: " .. tostring(data.buttonMode))
end
if data.collidable then
  print("Collidable (inactive): " .. tostring(not not data.collidable[1]))
  print("Collidable (active): " .. tostring(not not data.collidable[2]))
end


-- Preload texture mapping
local txtdb = model.Textures.load()

-- Compute a pallette
local palette = {}
local cpi = 1
for voxel in data:voxels_rgb(txtdb) do
  if not palette[voxel.rgb] then
    palette[voxel.rgb] = cpi
    component.hologram.setPaletteColor(cpi, voxel.rgb)
    cpi = cpi + 1
  end
end

if #palette > 3 then
  io.stderr:write("Warning: More than 3 colors.\n")
end

component.hologram.clear()
-- 3D Printer is low inclusive, high exclusive, 0-16 (fenced)
-- Hologram is both inclusive, 1-16 (indexed)
for voxel in data:voxels_rgb(txtdb) do
  if not voxel.state then
    local c = palette[voxel.rgb]
    component.hologram.set(voxel[1]+16, voxel[2]+8, voxel[3]+16, c)
  end
end