sf2-damage-watcher.lua

print("Life/stun damage watcher for SF2 games in MAME-rr")
print("written by Dammit, 6/27/2011")

--local P2_life = 30 --use this to test damage scaling

local base, space
local life, stun, time = 0x2C, 0x5E, 0x5C
local old_life, old_stun, old_time = {}, {}, {}

local function initialize()
    for p = 1,2 do
        old_life[p] = memory.readword(base + space*(p-1) + life)
        old_stun[p] = memory.readword(base + space*(p-1) + stun)
        old_time[p] = memory.readword(base + space*(p-1) + time)
    end
end

emu.registerstart(function()
    for _, game in ipairs({
        {base = 0xFF833C, space = 0x400, name = "hsf2"},
        {base = 0xFF844E, space = 0x400, name = "ssf2t"},
        {base = 0xFF83CE, space = 0x400, name = "ssf2"},
        {base = 0xFF83BE, space = 0x300, name = "sf2hf"},
        {base = 0xFF83BE, space = 0x300, name = "sf2ce"},
        {base = 0xFF83C6, space = 0x300, name = "sf2"},
    }) do
        if emu.romname() == game.name or emu.parentname() == game.name then
            base, space = game.base, game.space
            initialize()
            print() print("now playing " .. game.name)
            print("player\tdamage\tstun\ttimeout")
            return
        end
    end
    error(emu.romname() .. ": not an SF2 game", 0)
end)

savestate.registerload(function()
    initialize()
end)

if P2_life then
    memory.writeword(base + space + life, P2_life)
    memory.writeword(base + space + life-2, P2_life)
end

emu.registerafter(function()
    for p = 1,2 do
        local new = {
            life = memory.readword(base + space*(p-1) + life),
            stun = memory.readword(base + space*(p-1) + stun),
            time = memory.readword(base + space*(p-1) + time),
        }
        local diff = {
            life = new.life - old_life[p],
            stun = new.stun - old_stun[p],
            time = new.time - old_time[p],
        }
        if diff.life < 0 or diff.stun > 0 or diff.time > 0 then
            diff.time = ((old_time[p] > 0 or diff.life >= 0) and diff.time+1) or diff.time
            diff.stun = (diff.stun < 0 and "-") or diff.stun
            diff.time = (diff.time < 0 and "-") or diff.time
            print(string.format("%d\t%d\t%s\t%s", p, -diff.life, diff.stun, diff.time))
        end
        old_life[p], old_stun[p], old_time[p] = new.life, new.stun, new.time
    end
end)

gui.register(function()
    gui.box(-0x01, -0x01, 0x0D, 0x18, 0x44444488, 0xffffff88)
    gui.text(0x01, 0x00, string.format("%3d", old_life[1]), 0x00ff00ff)
    gui.text(0x01, 0x08, string.format("%3d", old_stun[1]), 0x00ffffff)
    gui.text(0x01, 0x10, string.format("%3d", old_time[1]), 0xffff00ff)
    gui.box(emu.screenwidth()-0x0E, -0x01, emu.screenwidth(), 0x18, 0x44444488, 0xffffff88)
    gui.text(emu.screenwidth()-0x0C, 0x00, string.format("%3d", old_life[2]), 0x00ff00ff)
    gui.text(emu.screenwidth()-0x0C, 0x08, string.format("%3d", old_stun[2]), 0x00ffffff)
    gui.text(emu.screenwidth()-0x0C, 0x10, string.format("%3d", old_time[2]), 0xffff00ff)
end)