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Routines |
| Prev: 877C | Up: Map | Next: 87B9 |
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Reload the actor graphic and XOR it via FetchAndDraw.
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Reload the actor graphic and XOR it via FetchAndDraw.
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| DrawActorSprite | 8787 | CALL LoadSpritePointers | Call LoadSpritePointers. | |||||||
| 878A | EXX | Switch to the shadow registers. | ||||||||
| 878B | CALL FetchAndDraw | Call FetchAndDraw. | ||||||||
| 878E | EXX | Switch back to the normal registers. | ||||||||
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Compare the cached screen MSB with the actor Y.
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| DrawActorSprite_Fetch | 878F | LD A,($5E56) | Subtract the actor Y from SpriteCachedY. | |||||||
| 8792 | SUB (IX+$04) | |||||||||
| 8795 | JP Z,ContinueSpriteWrite_Row | Jump to ContinueSpriteWrite_Row if they match. | ||||||||
| 8798 | JP M,DrawActorSprite_Draw | Jump to DrawActorSprite_Draw if the result is negative. | ||||||||
| 879B | LD C,A | Store the row difference in the row counter. | ||||||||
| 879C | LD A,($5E5A) | Jump to ContinueSpriteWrite_Row if the difference is taller than the old sprite's rows in SpriteCachedRows. | ||||||||
| 879F | CP C | |||||||||
| 87A0 | JP C,ContinueSpriteWrite_Row | |||||||||
| 87A3 | SUB C | Subtract it from SpriteCachedRows and jump to WriteSpriteRow. | ||||||||
| 87A4 | LD ($5E5A),A | |||||||||
| 87A7 | JP WriteSpriteRow | |||||||||
| DrawActorSprite_Draw | 87AA | EXX | Switch register sets and negate the row difference. | |||||||
| 87AB | NEG | |||||||||
| 87AD | LD C,A | |||||||||
| 87AE | LD A,($5E59) | Jump to ContinueSpriteWrite_Next if the difference is taller than the new sprite's rows in SpriteRowsLeft. | ||||||||
| 87B1 | CP C | |||||||||
| 87B2 | JP C,ContinueSpriteWrite_Next | |||||||||
| 87B5 | SUB C | Subtract it from the row count and jump to ContinueSpriteWrite_Done. | ||||||||
| 87B6 | JP ContinueSpriteWrite_Done | |||||||||
| Prev: 877C | Up: Map | Next: 87B9 |
