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Routines |
| Prev: 41767 | Up: Map | Next: 42064 |
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Used by the routine at 41767.
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| 41961 | LD IX,45599 | Load IX with address of complex state data for cannon's projectile | ||
| 41965 | LD A,(IX+1) | If projectile's depth is zero... | ||
| 41968 | OR A | ... | ||
| 41969 | RET Z | ...then return | ||
| 41970 | LD BC,49699 | Set projectile's graphic layout data address to that of drip stage 8, disconnected and falling (ball)... | ||
| 41973 | CALL 42512 | ... | ||
| 41976 | LD A,(IX+9) | If projectile's state is zero (fired vertically)... | ||
| 41979 | OR A | ... | ||
| 41980 | JR Z,42015 | ...then skip ahead to 42015 | ||
| 41982 | CP 8 | If projectile's state is not 8 (finished)... | ||
| 41984 | JR NZ,41991 | ...then skip ahead to 41991 | ||
| 41986 | LD (IX+1),0 | Set projectile's depth to 0 | ||
| 41990 | RET | Return | ||
| 41991 | CP 2 | If projectile's state is not 2 (fired right)... | ||
| 41993 | JR NZ,42006 | ...then skip ahead to 42006 | ||
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Projectile flying left
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| 41995 | CALL 42447 | Move entity left two characters... | ||
| 41998 | CALL 42447 | ... | ||
| 42001 | CALL 54348 | Move entity at IX into room to the left, if appropriate | ||
| 42004 | JR 42015 | Skip ahead to 42015 | ||
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Projectile flying right
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| 42006 | CALL 42505 | Move entity right two characters... | ||
| 42009 | CALL 42505 | ... | ||
| 42012 | CALL 54313 | Move entity at IX into room to the right, if appropriate | ||
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Update projectile's vertical velocity
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| 42015 | LD A,(IX+12) | Load projectile's velocity into A and E... | ||
| 42018 | LD E,A | ... | ||
| 42019 | ADD A,(IX+4) | Add velocity to y-coordinates of top and bottom of projectile... | ||
| 42022 | LD (IX+4),A | ... | ||
| 42025 | LD (IX+6),A | ... | ||
| 42028 | INC (IX+12) | Increase velocity by one (initially negative so will accelerate downwards) | ||
| 42031 | LD A,E | If velocity (before increase) was not 5... | ||
| 42032 | CP 5 | ...i.e. projectile has not yet fallen back to floor-level... | ||
| 42034 | RET NZ | ...then return | ||
| 42035 | LD (IX+9),8 | Set projectile's state to 8 (finished) | ||
| 42039 | LD BC,51483 | Set projectile's graphic layout data address to that of explosion (Bubo's projectile / fallen drips, level 4)... | ||
| 42042 | CALL 42512 | ... | ||
| 42045 | CALL 54768 | Check entity at IX for collision with another entity at same depth whose interaction-(11,6) flag is set... | ||
| 42048 | RET C | ...and if no collision occurred, then return | ||
| 42049 | CP 36 | If collision was not with entity of class 36 (skeleton, level 4)... | ||
| 42051 | JR NZ,42058 | ...then skip ahead to 42058 | ||
| 42053 | LD HL,45413 | Set skeleton's is-dying flag... | ||
| 42056 | SET 1,(HL) | ... | ||
| 42058 | CP 31 | If collision was with entity of class 31 (Berk)... | ||
| 42060 | CALL Z,53667 | ...then set Berk-has-been-killed flag | ||
| 42063 | RET | Return | ||
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