CountGameObjects Macro

[tbizzle]

Here is a Macro, "CountGameObjects", that will count a specific Game or Monster Object by checking it's Monster #ID. The Macro "CountObjects" that is already included in NESmaker on the other hand will count Objects by checking them for their specific flag or flags. I needed a Macro that would just count the specific Monster/Game Object, so I modified the old Macro by replacing Line 16, which is this:

LDA Object_flags,x

With this:

LDA Object_type,x

It's pretty simple, but is exactally what i needed with all the weapon objects I have included in my game. So if you need it, add this asm to your macros folder:

MACRO CountGameObjects arg0
    ;; arg0 - Which # Game/Monster Object needs counted?
    LDA arg0
    STA tempA
    TXA
    PHA
    TYA
    PHA
     
        LDA #$00
        STA temp
        LDX #$00
        countObjectLoop:
            LDA Object_status,x
            AND #%10000000
            BEQ +skipCountingThisObject
                LDA Object_type,x
                AND tempA
                BEQ +skipCountingThisObject
                    INC temp
            +skipCountingThisObject
                INX
                CPX #TOTAL_MAX_OBJECTS
                BNE countObjectLoop
         
 
    PLA
    TAY
    PLA
    TAX
    LDA temp ;; now the accumulator holds the number of that type of object still activated.
    ENDM

And use the Macro in your code like this:

CountGameObjects #$00

Enjoy!

 

[tbizzle]

*** WARNING! I was getting some messed up results with the above code! Here is the same concept macro that actually works by @baardbi !

Count Object Type 4.5.9

In NESmaker there's a great macro that lets you count objects with a certain object flag set. However this does not work if you want to count certain objects without an object flag set or just a certain object type. I made a new modified macro based on the default one in NESmaker. It counts a...

www.nesmakers.com

I forgot that he did this already.