The Firemen Hitbox Viewer

-- The Firemen Hitbox Viewer
-- Author: Omnigamer
-- 2/20/16

function draw_cross(x_pos,y_pos, color)
    gui.drawLine(x_pos-3,y_pos,x_pos+3,y_pos, color)
    gui.drawLine(x_pos,y_pos-3,x_pos,y_pos+3, color)
end

while true do

    camx = mainmemory.read_u16_le(0x0008A7) - 128;
    camy = mainmemory.read_u16_le(0x0008DB) - 128;

    hp = mainmemory.read_u8(0x0015C3)
    gui.drawText(3,30,string.format("HP: %d",hp))

    memory.usememorydomain("CARTROM")

    --Pete Coords
    x_coord = mainmemory.read_u16_le(0x0008A7)
    y_coord = mainmemory.read_u16_le(0x0008DB)

    draw_cross(x_coord - camx,y_coord-camy, "blue");


    --Danny Coords
    x_coord = mainmemory.read_u16_le(0x00091c)
    y_coord = mainmemory.read_u16_le(0x000920)

    draw_cross(x_coord - camx,y_coord-camy, "green");

    --Water hitboxes
    for i = 0x00,10 do

        ID = mainmemory.read_u16_le(0x0009D4+i*0x10);
        active = mainmemory.read_u16_le(0x0009D2+i*0x10);
        active2 = mainmemory.read_u16_le(0x0009c8+i*0x10);
        if((active ==0) and (active2 == 0)) then

            x_coord = mainmemory.read_u16_le(0x0009ca+i*0x10)
            y_coord = mainmemory.read_u16_le(0x0009cc+i*0x10)

            if(ID == 0) then
                gui.drawRectangle(x_coord-camx-5,y_coord-camy-5,5*2, 5*2,"white")
            elseif(ID==1) then
                if(mainmemory.read_u16_le(0x0009D6+i*0x10)==1)then
                    gui.drawRectangle(x_coord-camx-0xf,y_coord-camy-0xf,0xf*2, 0xf*2,"white")
                end
            end

        end
    end


    --Fire hitboxes
    for i = 0x00,0x0C do

        ID = mainmemory.read_u16_le(0x000BE9+i*0x20);
        HP = mainmemory.read_u16_le(0x000BFB+i*0x20)

        if((ID <0x8000) and (HP <0x8000)) then

            x_coord = mainmemory.read_u16_le(0x000BEB+i*0x20)
            y_coord = mainmemory.read_u16_le(0x000BEF+i*0x20)

            gui.drawText(x_coord-camx,y_coord-20-camy,string.format("%X", HP));

            offset = mainmemory.read_u16_le(0x000BF9+i*0x20)*32;

            start_address = memory.read_u16_le(0x012ad5+ID*2)+offset+0x8000;

            hitbox_x = memory.read_u16_le(start_address+10);
            hitbox_y = memory.read_u16_le(start_address+12);

            gui.drawRectangle(x_coord-camx-hitbox_x,y_coord-camy-hitbox_y,hitbox_x*2, hitbox_y*2,"red")
        end
    end

    emu.frameadvance()
end