terranigma_rng_crit.lua

require "terranigma_rng"

local function computeMaxEnemyLuck(randomNumber)

    local playerLuck = memory.readbyte(0x7e0666)
    local maxEnemyLuck = playerLuck + 8 - AND(randomNumber,0x7f)-1

    if AND(randomNumber,0x7f)<4 then
      maxEnemyLuck = 99
    end

    return maxEnemyLuck
end

rng.set_title("Crits")
rng.set_nr_rows(16)
rng.set_nr_columns (2)
rng.set_column_width(6)
rng.set_text(function(x,y,counter,rn)

  -- Determine the highest enemy luck value that will still yield a critical, given the player's current luck stat, and the provided random number
  local maxEnemyLuck = computeMaxEnemyLuck(rn)
  local actualEnemyLuck = 40

  -- Default text color is red
  local rngColor = 0xFF0000FF

  -- This random number will generate a critical hit -> green text
  if actualEnemyLuck <= maxEnemyLuck then
    rngColor = 0x00FF00FF
  end

  -- Show the highest enemy luck value that will yield a crit
  if maxEnemyLuck < 0 then
    gui.text(x,y,string.upper(string.format('%02x: --',counter)),rngColor)
  else
    gui.text(x,y,string.upper(string.format('%02x: %02d',counter,maxEnemyLuck)),rngColor)
  end
end)

rng.show()
while true do
  emu.frameadvance()
end