4.5.9 Better One-Way Platformer Tile

[Bucket Mouse]

The platformer modules in NESMaker have a one-way platformer tile. You can jump up through them, but not down. This is how the tile is written:

;;solid tile
LDA Object_v_speed_hi,x
BMI +skipMakingSolid
    LDA ObjectUpdateByte
    ORA #%00000001
    STA ObjectUpdateByte ;; makes solid
+skipMakingSolid
rts

Problem is, the tile only becomes non-solid if the player sprite is directly under it. If you approach it from the side, the sprite will crash into it.
This is because it was written wrong. The first LDA should actually be:

LDA Object_h_speed_lo,x

Make that one little correction and you can jump onto the tile from any angle.

;;solid tile
LDA Object_h_speed_lo,x
BMI +skipMakingSolid
    LDA ObjectUpdateByte
    ORA #%00000001
    STA ObjectUpdateByte ;; makes solid
+skipMakingSolid
rts

 

[dale_coop]

Nice. Thank you for sharing your script @Bucket Mouse

Also, there is another topic by @Jonny about that subject:

[4.5.9] Drop through OneWay Tile (when down is pressed)

This is a very short and simple tutorial solely because I've been searching for the ideal way to do this but couldn't find one. I thought there might be some new users trying to do this same thing and struggling to find info like I was. Note: In earlier versions of NesMaker this was done in the...

www.nesmakers.com

 

[SciNEStist]

Someone should compile a list of all these little fixes, we might be able to assemble an "unofficial patch"