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Routines |
| Prev: 52309 | Up: Map | Next: 52371 |
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Used by the routine at 52309.
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| 52315 | LD A,(IX+1) | If Drutt's depth is not 1... | ||||||
| 52318 | CP 1 | ... | ||||||
| 52320 | JR NZ,52351 | ...then skip ahead to 52351 | ||||||
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Drutt's depth is 1
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| 52322 | LD A,(34230) | If Drutt's current depth is the same as number of available depth levels in current room... | ||||||
| 52325 | CP (IX+1) | ...i.e. room has depth of 1... | ||||||
| 52328 | RET Z | ...then return (as there is no other depth level for Drutt to move to) | ||||||
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The following collision check is usually only satisfied by Berk. This prevents Drutt from jumping back a depth level while in front of (at same depth level as) Berk.
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| 52329 | CALL 54878 | Check Drutt for collision with another entity (only those defined before, and in reverse order) at same depth level whose interaction-(11,7) flag is set and if a collision occurred, then return | ||||||
| 52332 | RET NC | |||||||
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The following collision check prevents Drutt from jumping back when there is an obstruction (e.g. the brick columns in the pit room, level 1) behind him.
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| 52333 | CALL 54890 | Check Drutt for collision with another entity (in reverse order) at next depth level into screen whose interaction-(11,7) flag is set and if no collision occurred, then skip ahead to 52341 | ||||||
| 52336 | JR C,52341 | |||||||
| 52338 | CP 22 | If collision was with an entity of class of 22 or greater (can't be picked up)... | ||||||
| 52340 | RET NC | ...then return | ||||||
| 52341 | INC (IX+1) | Increase Drutt's depth (i.e. move backward away from screen) | ||||||
| 52344 | DEC (IX+4) | Decrease Drutt's top and bottom y-coordinates... | ||||||
| 52347 | DEC (IX+6) | ... | ||||||
| 52350 | RET | Return | ||||||
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Drutt's depth is not 1
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| 52351 | LD A,(IX+1) | If Drutt's current depth is 1... (see trivia) | ||||||
| 52354 | CP 1 | ... | ||||||
| 52356 | RET Z | ...then return | ||||||
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The following collision check prevents Drutt from jumping forward a depth level while in behind an obstruction (e.g. Berk).
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| 52357 | CALL 54764 | Check Drutt for collision with another entity at next depth level out of screen whose interaction-(11,6) flag is set... | ||||||
| 52360 | RET NC | ...and if a collision occurred, then return | ||||||
| 52361 | DEC (IX+1) | Decrease Drutt's depth (i.e. move forward towards screen) | ||||||
| 52364 | INC (IX+4) | Increase Drutt's top and bottom y-coordinates... | ||||||
| 52367 | INC (IX+6) | ... | ||||||
| 52370 | RET | Return | ||||||
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