Monster and Monster Weapon Barrier Script

[tbizzle]

If you followed the tutorial here to bring back monster weapons into your game:

4.5.9 Bring Back Monster Weapons (Maze Module) and Others!

If your "doHandleObjectCollisions.asm" is missing the area for monster weapons or they seem to be not working for you try this: Using the script of the same name above in Maze module as a base at line 98 you'll see the end of your monster player collision section. "+notPlayerMonsterCollision:"...

www.nesmakers.com

You may want a tile that will not let monsters and monster weapons to not cross. So here ya go!!!!!!!! Script below, I used this with the Metroidvania Module. I haven't tested it out with any other module, still should work.

LDA Object_flags,x
    AND #%00001000
        BNE +nextThing
        LDA Object_flags,x
        AND #%00010000
           +nextThing:
    BEQ skipMonsterBlock
    LDA ObjectUpdateByte
    ORA #%00000001
    STA ObjectUpdateByte
skipMonsterBlock:
  RTS

 

[dale_coop]

Cleaner, simpler code:

LDA Object_flags,x
AND #%00011000        ;; checking "monster weapon", "monster" bits
BEQ +skipMonsterBlock    ;; if none of them is set, tile shoud be not solid
    LDA ObjectUpdateByte
    ORA #%00000001
    STA ObjectUpdateByte
+skipMonsterBlock:
  RTS

 

[tbizzle]

@dale_coop Thank you!!!

 

[TheRetroBro]

Thank you gentlemen I Can confirm this works for LR Platformer.