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Routines |
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The routine for objects of type 40 to 4F, the spores. A spore wanders about at random, and vanishes when the player is more than three cells away. If a shot hits it, both the spore and the shot burst. If the player touches it, the spore bursts and the player is hurt. Either way, 05 hundred points are added to the score.
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Wander, then flip the sprite if the view is turned.
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| UpdateSpore | CE89 | LD B,$07 | Use 07 as the number of random bits for the velocity. | |
| CE8B | CALL ChooseRandomVelocity | Choose a new random velocity when the timer has run out. | ||
| CE8E | CALL SetDirectionFromVelocity | Make the spore face the way that it is moving. | ||
| CE91 | CALL MoveObject | Move the spore. | ||
| CE94 | CALL NextSpriteNumber | Animate the spore. | ||
| CE97 | LD A,($BBBA) | Check whether the view is turned round, to flip the sprite to match. | ||
| CE9A | RRCA | |||
| CE9B | RRCA | |||
| CE9C | AND $40 | |||
| CE9E | LD C,A | |||
| CE9F | LD A,(IX+$07) | Set or clear the flip flag of the spore. | ||
| CEA2 | AND $BF | |||
| CEA4 | OR C | |||
| CEA5 | LD (IX+$07),A | |||
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Vanish, burst, or hurt the player.
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| CEA8 | LD C,$03 | Set the distance to 03 cells and check whether the spore is that close to the player. | ||
| CEAA | CALL CheckPlayerClose | |||
| CEAD | JR NC,BurstSporeAndShot_Remove | Jump to BurstSporeAndShot_Remove to remove the spore if it is further away. | ||
| CEAF | CALL CheckShotHit | Check whether a shot has hit the spore, and jump to BurstSporeAndShot if it has. | ||
| CEB2 | JR C,BurstSporeAndShot | |||
| CEB4 | CALL CheckPlayerCollision | Check whether the spore is touching the player, and return if it is not. | ||
| CEB7 | RET NC | |||
| CEB8 | CALL BurstSporeAndShot_Score | Add the points for the spore to the score. | ||
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