GBA_Double_Dragon_显血LUA脚本

-- 2024.10.24 发布到pastebin.
-- Mesen模拟器的显示血量lua脚本.

-- 内存地址
local playerHPAddress = 0x37C32
local scroll1XAddress = 0x32C32
local scroll1YAddress = 0x32BFA
local enemyHPAddresses = {0x37E12, 0x37D52, 0x37DB2, 0x37CF2, 0x37C92}

local function getCoordinates(baseAddress)
    local xAddress = baseAddress - 0x34
    local yAddress = baseAddress - 0x30

    local x = emu.readWord(xAddress, emu.memType.gbaExtWorkRam, false)
    local y = emu.readWord(yAddress, emu.memType.gbaExtWorkRam, false)

    return x, y
end

local function getScrollOffsets()
    local scrollX = emu.readWord(scroll1XAddress, emu.memType.gbaExtWorkRam, false)
    local scrollY = emu.readWord(scroll1YAddress, emu.memType.gbaExtWorkRam, false)

    return scrollX, scrollY
end

local function getHP(address)
    return emu.read(address, emu.memType.gbaExtWorkRam, false)
end

local function drawPlayerHP()
    local playerX, playerY = getCoordinates(playerHPAddress)
    local scrollX, scrollY = getScrollOffsets()

    local drawX = playerX - scrollX
    local drawY = playerY - scrollY - 0

    local playerHP = getHP(playerHPAddress)

    local hpText = tostring(playerHP)
    local charWidth = #hpText * 8
    local boxWidth = charWidth + 2
    local boxHeight = 12

    emu.drawRectangle(drawX, drawY, boxWidth, boxHeight, 0x0F000000, true)
    emu.drawString(drawX + 1, drawY + 1, hpText, 0x0FFFFFFF, 0xFF000000)

end

local function drawEnemyHP()
    local scrollX, scrollY = getScrollOffsets()

    for _, enemyHPAddress in ipairs(enemyHPAddresses) do
        local enemyX, enemyY = getCoordinates(enemyHPAddress)
        local drawX = enemyX - scrollX
        local drawY = enemyY - scrollY - 0

        local enemyHP = getHP(enemyHPAddress)

        local hpText = tostring(enemyHP)
        local charWidth = #hpText * 8
        local boxWidth = charWidth + 2
        local boxHeight = 12

        emu.drawRectangle(drawX, drawY, boxWidth, boxHeight, 0x0F000000, true)
        emu.drawString(drawX + 1, drawY + 1, hpText, 0x0FFFFFFF, 0xFF000000)

    end
end

-- 每帧更新玩家和敌人的HP
local function update()
    drawPlayerHP()
    drawEnemyHP()
end

emu.addEventCallback(update, emu.eventType.endFrame)