TakuikaNinja
Active member
It's me again with another bug fix!
This time, the issue revolves around how the screen scroll behaves when the player stops moving.
By default, the game doesn't check if the player is beyond the "scroll pad" when the D-pad is released.
This means rapidly pressing and releasing a direction will move the player without scrolling, so you can end up in situations like this!
Obviously we don't want that! So here's how to fix it, assuming you've already imported the input links from the tutorial:
And that's it! (Yes, I know I haven't shared my method of setting up sprite 0 parallax yet. The guide for that will be up soon.)
This time, the issue revolves around how the screen scroll behaves when the player stops moving.
By default, the game doesn't check if the player is beyond the "scroll pad" when the D-pad is released.
This means rapidly pressing and releasing a direction will move the player without scrolling, so you can end up in situations like this!
Obviously we don't want that! So here's how to fix it, assuming you've already imported the input links from the tutorial:
- Create a new .asm file and call it something like "do_stopScrolling_metroVania.asm". Save it in "Routines\BASE_4_5\Game\MOD_MetroidVania\Inputs\" for convenience.
- Copy and paste the following code into the file and save it:
Code:;;; this will stop the camera from moving. ;;; great for release events in 2-way scrolling. LDX player1_object LDA Object_x_hi,x SEC SBC camX CMP #LEFT_SCROLL_PAD BEQ +doActivateScrollByteL BCC +doActivateScrollByteL JMP +nextCheck +nextCheck CMP #RIGHT_SCROLL_PAD BEQ +doActivateScrollByteR BCS +doActivateScrollByteR JMP +resetScroll +doActivateScrollByteL LDA scrollByte AND #%01000000 BEQ +notChangingCamDirectionForUpdateL LDA scrollByte ORA #%00000010 +notChangingCamDirectionForUpdateL AND #%00111111 ORA #%10000000 STA scrollByte RTS +doActivateScrollByteR LDA scrollByte AND #%01000000 BNE +notChangingCamDirectionForUpdateR LDA scrollByte ORA #%00000010 +notChangingCamDirectionForUpdateR AND #%00111111 ORA #%11000000 STA scrollByte RTS +resetScroll LDA scrollByte AND #%00001111 STA scrollByte RTS - In the input editor, remove these script associations:
- Go to Scripts -> Input Scripts. Remove "do_stopScrolling.asm", then add "do_stopScrolling_metroVania.asm".
- Go back to the input editor and add these script associations:
- Export the game! If you see weird tiles loading, an extra export should do the trick.
(NESmaker sometimes mucks it up for some reason)
And that's it! (Yes, I know I haven't shared my method of setting up sprite 0 parallax yet. The guide for that will be up soon.)
