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Routines |
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The handler for the ghostlet (sprite IDs 4E and 4F). It is the same as HandlerPumpkin at the start, but the player is checked for touching before the weapon. The ghostlet changes to a new random velocity every time the counter at offset 07 wraps round to zero (every 0100 steps) and then moves by MoveCreature.
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| HandlerGhostlet | 862E | CALL StoreEntity | Call StoreEntity to save the position of the ghostlet. | |||||
| 8631 | LD A,($EA91) | Fetch the room of the player from PlayerRoom. | ||||||
| 8634 | CP (IX+$01) | Jump to CountDownCreature if the ghostlet is not in the same room as the player. | ||||||
| 8637 | JP NZ,CountDownCreature | |||||||
| 863A | LD HL,$5E25 | Point HL at the number of creatures at NumCreatures. | ||||||
| 863D | INC (HL) | Increment the number of creatures by one. | ||||||
| 863E | CALL CheckPlayerTouch | Call CheckPlayerTouch to check whether the entity is touching the player. | ||||||
| 8641 | DEC E | Jump to HandleTouchingCreature if the ghostlet touched the player. | ||||||
| 8642 | JP Z,HandleTouchingCreature | |||||||
| 8645 | CALL CheckWeaponHit | Call CheckWeaponHit to check whether the weapon has hit the entity. | ||||||
| 8648 | DEC E | Jump to PopCreature if the ghostlet was hit by a weapon. | ||||||
| 8649 | JP Z,PopCreature | |||||||
| 864C | LD (IX+$05),$45 | Set the attribute of the entity to INK:CYAN, PAPER:BLACK (BRIGHT). | ||||||
| 8650 | INC (IX+$07) | Increment the step counter at offset 07. | ||||||
| 8653 | CALL Z,RandomiseVelocity | Call RandomiseVelocity if it has wrapped round to zero. | ||||||
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Animate the ghostlet by changing the sprite every fourth step.
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| 8656 | LD A,(IX+$07) | Fetch the step counter. | ||||||
| 8659 | RRA | Divide the step counter by four, so that the sprite changes every fourth step. | ||||||
| 865A | RRA | |||||||
| 865B | AND %00000001 | Keep only bit 0. | ||||||
| 865D | LD C,A | Keep the animation frame in C. | ||||||
| 865E | LD A,(IX+$00) | Fetch the sprite ID of the ghostlet. | ||||||
| 8661 | AND %11111110 | Reset bit 0. | ||||||
| 8663 | ADD A,C | Add the animation frame to the sprite ID. | ||||||
| 8664 | LD (IX+$00),A | Update the sprite ID of the ghostlet. | ||||||
| 8667 | LD DE,($5E1D) | Fetch the size of the room from CurrentRoom_Width. | ||||||
| 866B | LD (IX+$0F),$00 | Write 00 to offset 0F of the ghostlet, so it is not removed. | ||||||
| 866F | JP MoveCreature | Jump to MoveCreature to move the creature. | ||||||
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