|
Routines |
| Prev: CCD8 | Up: Map | Next: CCEC |
|
Used by the routine at dZ_ok.
Keeps the whole of the object's footprint between the room's east and west walls, $80 plus and minus the X half-size in $5BAB, shortening dX a unit at a time and setting bit 0 of +$0C if it had to.
Two things switch the walls off: the room-entry walk (the top nibble of +$0C) and being near an archway (bit 0 of +$07, set by chk_plyr_spec_near_arch). That is how the player walks into an arch at all -- and why only the arch's own pillars, which are objects, then stop him.
|
||||||||||||
| adj_dX_for_out_of_bounds | CCDD | LD A,(IX+$0C) | not during the room-entry walk | |||||||||
| CCE0 | AND $F0 | |||||||||||
| CCE2 | RET NZ | |||||||||||
| CCE3 | BIT 0,(IX+$07) | not near an archway | ||||||||||
| CCE7 | RET NZ | |||||||||||
| CCE8 | LD A,($5BAB) | B = the X half-size | ||||||||||
| CCEB | LD B,A | |||||||||||
| Prev: CCD8 | Up: Map | Next: CCEC |