|
Routines |
| Prev: CC01 | Up: Map | Next: CC96 |
|
Used by the routine at ADJUST_PLYR_UVZ_FOR_ROOM_SIZE.
The code takes a room's doorways to be its first backgrounds, two pieces each, a pillar of graphic 2 and one of graphic 3 (BACKGROUND0 and the three after it). The first pillars are then records 4, 6, 8 and 10, and the wall an arch is in is told by its first pillar's U + V (mod 256): $52 at high V, $38 at high U, $C8 at low V, $AE at low U. The one wanted gives the legs its Z, and the top goes 12 above; that is what puts him at the right height in a raised doorway.
The search stops at the first record that is not an arch pillar (graphic 4 or more) or after four; with no match Z is left alone. The RET after the fourth was never reached in the build's sessions. As Knight Lore's adjust_plyr_Z_for_arch, whose pillars are graphics 2 to 5.
|
||||||||||
| ADJUST_PLYR_Z_FOR_ARCH | CC6D | LD IY,ROOM_OBJECTS | Record 4, and every other record from there: four doorways at most | |||||||
| CC71 | LD DE,$0040 | |||||||||
| CC74 | LD B,$04 | |||||||||
| ADJUST_PLYR_Z_FOR_ARCH_0 | CC76 | LD A,(IY+$00) | Not an arch pillar: no more doorways | |||||||
| CC79 | CP $04 | |||||||||
| CC7B | RET NC | |||||||||
| CC7C | LD A,(IY+$01) | This arch? | ||||||||
| CC7F | ADD A,(IY+$02) | |||||||||
| CC82 | CP C | |||||||||
| CC83 | JR Z,ADJUST_PLYR_Z_FOR_ARCH_1 | |||||||||
| CC85 | ADD IY,DE | The next; none matched | ||||||||
| CC87 | DJNZ ADJUST_PLYR_Z_FOR_ARCH_0 | |||||||||
| CC89 | RET | |||||||||
| ADJUST_PLYR_Z_FOR_ARCH_1 | CC8A | LD A,(IY+$03) | The legs' Z = the pillar's; the top 12 above | |||||||
| CC8D | LD (IX+$03),A | |||||||||
| CC90 | ADD A,$0C | |||||||||
| CC92 | LD (IX+$23),A | |||||||||
| CC95 | RET | |||||||||
| Prev: CC01 | Up: Map | Next: CC96 |