Virtual SevSeg API

local numbers = {}
numbers[0] = {1, 1, 1, 0, 1, 1, 1}
numbers[1] = {0, 0, 1, 0, 0, 1, 0}
numbers[2] = {1, 0, 1, 1, 1, 0, 1}
numbers[3] = {1, 0, 1, 1, 0, 1, 1}
numbers[4] = {0, 1, 1, 1, 0, 1, 0}
numbers[5] = {1, 1, 0, 1, 0, 1, 1}
numbers[6] = {1, 1, 0, 1, 1, 1, 1}
numbers[7] = {1, 0, 1, 0, 0, 1, 0}
numbers[8] = {1, 1, 1, 1, 1, 1, 1}
numbers[9] = {1, 1, 1, 1, 0, 1, 1}

function initSevenSeg(startX, startY, nSize, nInactiveColor)
  startX, startY, nSize, nInactiveColor = tonumber(startX), tonumber(startY), tonumber(nSize), tonumber(nInactiveColor)

  if not nSize or type(startX) ~= "number" or type(startY) ~= "number" or type(nSize) ~= "number" then
    return false, "initSevenSeg(startX, startY, nSize[, nInactiveColor])"
  end

  local oldBgColor = term.getBackgroundColor()

  nInactiveColor = nInactiveColor or colors.lightGray

  paintutils.drawLine(startX + 1, startY, startX + nSize, startY, nInactiveColor)
  paintutils.drawLine(startX, startY + 1, startX, startY + nSize, nInactiveColor)
  paintutils.drawLine((startX + 1) + nSize, startY + 1, (startX + 1) + nSize, startY + nSize, nInactiveColor)
  paintutils.drawLine(startX + 1, (startY + 1) + nSize, startX + nSize, (startY + 1) + nSize, nInactiveColor)
  paintutils.drawLine(startX, (startY + 2) + nSize, startX, (startY + 1) + nSize * 2, nInactiveColor)
  paintutils.drawLine((startX + 1) + nSize, (startY + 2) + nSize, (startX + 1) + nSize, (startY + 1) + nSize * 2, nInactiveColor)
  paintutils.drawLine(startX + 1, (startY + 2) + nSize * 2, startX + nSize, (startY + 2) + nSize * 2, nInactiveColor)

  term.setBackgroundColor(oldBgColor)

  return true
end

function drawSevenSeg(nNumber, startX, startY, nSize, nActiveColor, nInactiveColor)
  nNumber, startX, startY, nSize, nActiveColor, nInactiveColor = tonumber(nNumber), tonumber(startX), tonumber(startY), tonumber(nSize), tonumber(nActiveColor), tonumber(nInactiveColor)

  if not nSize or type(nNumber) ~= "number" or type(startX) ~= "number" or type(startY) ~= "number" or type(nSize) ~= "number" then
    return false, "drawSevenSeg(nNumber, startX, startY, nSize[, nActiveColor, nInactiveColor])"
  end

  local oldBgColor = term.getBackgroundColor()

  nActiveColor = nActiveColor or colors.red
  nInactiveColor = nInactiveColor or colors.lightGray

  if nNumber > 9 then
    if nNumber % 9 == 0 then
      nNumber = 9
    else
      nNumber = nNumber % 9
    end
  end

  initSevenSeg(startX, startY, nSize, nInactiveColor)

  if numbers[nNumber][1] == 1 then
    paintutils.drawLine(startX + 1, startY, startX + nSize, startY, nActiveColor)
  end
  if numbers[nNumber][2] == 1 then
    paintutils.drawLine(startX, startY + 1, startX, startY + nSize, nActiveColor)
  end
  if numbers[nNumber][3] == 1 then
    paintutils.drawLine((startX + 1) + nSize, startY + 1, (startX + 1) + nSize, startY + nSize, nActiveColor)
  end
  if numbers[nNumber][4] == 1 then
    paintutils.drawLine(startX + 1, (startY + 1) + nSize, startX + nSize, (startY + 1) + nSize, nActiveColor)
  end
  if numbers[nNumber][5] == 1 then
   paintutils.drawLine(startX, (startY + 2) + nSize, startX, (startY + 1) + nSize * 2, nActiveColor)
  end
  if numbers[nNumber][6] == 1 then
   paintutils.drawLine((startX + 1) + nSize, (startY + 2) + nSize, (startX + 1) + nSize, (startY + 1) + nSize * 2, nActiveColor)
  end
  if numbers[nNumber][7] == 1 then
    paintutils.drawLine(startX + 1, (startY + 2) + nSize * 2, startX + nSize, (startY + 2) + nSize * 2, nActiveColor)
  end

  term.setBackgroundColor(oldBgColor)

  return true, numbers[nNumber]
end

function drawMultipleNumbers(nNumber, startX, startY, nSize, nActiveColor, nInactiveColor)
  nNumber, startX, startY, nSize, nActiveColor, nInactiveColor = tonumber(nNumber), tonumber(startX), tonumber(startY), tonumber(nSize), tonumber(nActiveColor), tonumber(nInactiveColor)

  if not nSize or type(nNumber) ~= "number" or type(startX) ~= "number" or type(startY) ~= "number" or type(nSize) ~= "number" then
    return false, "drawMultipleNumbers(nNumber, startX, startY, nSize[, nActiveColor, nInactiveColor])"
  end

  local oldBgColor = term.getBackgroundColor()

  local sNumber = tostring(nNumber)

  for i = 1, string.len(sNumber) do
    if i == 1 then
      drawSevenSeg(tonumber(sNumber:sub(1, 1)), startX, startY, nSize, nActiveColor, nInactiveColor)
    else
      drawSevenSeg(tonumber(sNumber:sub(i, i)), (((nSize + 2) + startX - 1) + (2 + (((nSize + 2) + startX - 1)) * (i - 2))), startY, nSize, nActiveColor, nInactiveColor)
    end
  end

  term.setBackgroundColor(oldBgColor)

  return true, nNumber
end