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Routines |
| Prev: 52801 | Up: Map | Next: 53339 |
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Used by the routine at GoldfishGame.
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The player has hit a sprite; test whether it is a fish or a creature.
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| GoldfishGame_Collision | 53238 | LD A,(56334) | C=*GoldfishGame_PlayerAttributes. | |
| 53241 | LD C,A | |||
| 53242 | LD A,(IX+0) | A=the other sprite's horizontal co-ordinate. | ||
| 53245 | SUB (IX+7) | Subtract the player's width at *GoldfishGame_PlayerWidth. | ||
| 53248 | INC A | Increment A by one. | ||
| 53249 | SUB C | Subtract the player column. | ||
| 53250 | CP 2 | Jump to GoldfishGame_NextCreature if the sprites do not overlap. | ||
| 53252 | JR NC,GoldfishGame_NextCreature | |||
| 53254 | PUSH IX | Stash the other sprite on the stack. | ||
| 53256 | LD HL,100 | HL=0100. | ||
| 53259 | LD DE,100 | DE=0100. | ||
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| 53262 | CALL 949 | Call BEEPER. | ||
| 53265 | POP IX | Restore the other sprite from the stack. | ||
| 53267 | LD A,(IX+8) | Jump to GoldfishGame_HitCreature if this sprite is not a collectable fish. | ||
| 53270 | CP 1 | |||
| 53272 | JR NZ,GoldfishGame_HitCreature | |||
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The player has caught a fish; add it to the count and remove it from the screen.
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| GoldfishGame_CaughtFish | 53274 | LD A,(56130) | Increment *GoldfishGame_FishCaught by one. | |
| 53277 | INC A | |||
| 53278 | LD (56130),A | |||
| 53281 | LD C,(IX+0) | C=the fish horizontal co-ordinate. | ||
| 53284 | LD B,(IX+1) | B=the fish vertical co-ordinate. | ||
| 53287 | LD E,(IX+7) | E=the fish width. | ||
| 53290 | LD D,(IX+8) | D=the fish height. | ||
| 53293 | LD A,(IX+2) | Jump to GoldfishGame_Collision_BlankSprite if the horizontal offset is 3. | ||
| 53296 | CP 3 | |||
| 53298 | JR Z,GoldfishGame_Collision_BlankSprite | |||
| 53300 | INC E | Widen the erase by one column. | ||
| GoldfishGame_Collision_BlankSprite | 53301 | LD HL,40812 | Write 40812 to *CHARS. | |
| 53304 | LD (23606),HL | |||
| 53307 | LD A,32 | A=a blank character. | ||
| 53309 | CALL GoldfishGame_PrintSprite | Erase the fish. | ||
| 53312 | LD (IX+10),0 | Mark this fish slot inactive. | ||
| 53316 | JP GoldfishGame_NextCreature | Jump to GoldfishGame_NextCreature. | ||
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A sea creature steals all collected fish.
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| GoldfishGame_HitCreature | 53319 | XOR A | Clear *GoldfishGame_FishCaught. | |
| 53320 | LD (56130),A | |||
| 53323 | PUSH IX | Stash IX on the stack. | ||
| 53325 | LD HL,200 | HL=0200. | ||
| 53328 | LD DE,50 | DE=0050. | ||
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| 53331 | CALL 949 | Call BEEPER. | ||
| 53334 | POP IX | Restore IX from the stack. | ||
| 53336 | JP GoldfishGame_NextCreature | Jump to GoldfishGame_NextCreature. | ||
| Prev: 52801 | Up: Map | Next: 53339 |