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Routines |
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Handles a rhino (sprite IDs 30 to 33). Bit 1 of the sprite ID is set when the rhino is facing right.
The rhino moves with its X velocity (see MoveActor) and stops and turns around if it is blocked, when its speed is also reset. If it touches the player then the player is hurt and the rhino turns around, unless the player is attacking, in which case the rhino is knocked back instead (see KnockBackRhino).
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| HandlerRhino | AD07 | CALL StoreEntity | Remember the previous position of the rhino. | |||||
| AD0A | CALL AnimateRhino | Animate the rhino. | ||||||
| AD0D | LD A,$20 | Set the width of the rhino in Actor_Width to 20. | ||||||
| AD0F | LD ($96AD),A | |||||||
| AD12 | CALL MoveActor | Work out the new position of the rhino. | ||||||
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Stop the rhino moving through objects in the room. If it did not manage to move then turn it around.
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| AD15 | LD BC,$171F | Set the height of the rhino in B to 17 and the width in C to 1F. | ||||||
| AD18 | CALL SlideActorPastObjects | Stop the rhino passing through objects in the room. | ||||||
| AD1B | CALL TestPositionUnchanged | Test whether the rhino has stayed where it was. | ||||||
| AD1E | JR NZ,HandlerRhino_Position | Jump to HandlerRhino_Position if the rhino has moved. | ||||||
| AD20 | LD A,$30 | Set the speed of the rhino in A to 30. | ||||||
| AD22 | CALL SetVelocityMagnitude | Set the speed of the rhino, keeping its direction. | ||||||
| AD25 | CALL TurnRhinoAround | Turn the rhino around. | ||||||
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This entry point is used by the routine at HandlerHippoWarthog.
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| HandlerRhino_Position | AD28 | LD (IX+$03),E | Set the X position of the rhino. | |||||
| AD2B | LD (IX+$04),D | Set the Y position of the rhino. | ||||||
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Test whether the rhino has touched the player.
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| AD2E | LD A,(IX+$00) | Fetch the sprite ID of the rhino. | ||||||
| AD31 | RRCA | Rotate right, so bit 1 is now in bit 0. | ||||||
| AD32 | AND %00000001 | Keep only bit 0. | ||||||
| AD34 | LD D,A | Store the result in D (the hit direction for TestActorHurtingPlayer). | ||||||
| AD35 | LD BC,$0F1C | Set the reach used to test whether the rhino is touching the player in BC to 0F1C. | ||||||
| AD38 | CALL TestActorHurtingPlayer | Test whether the rhino is hurting the player. | ||||||
| AD3B | JR NC,UpdateActor | Jump to UpdateActor if the rhino is not touching the player. | ||||||
| AD3D | LD A,($9704) | Fetch the hit direction of the player from 9704. | ||||||
| AD40 | AND A | Jump to KnockBackRhino if the player was not hit, which means the rhino was hit by the sword. | ||||||
| AD41 | JR Z,KnockBackRhino | |||||||
| AD43 | CALL TurnRhinoAround | Turn the rhino around. | ||||||
| Prev: AC77 | Up: Map | Next: AD46 |