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Routines |
| Prev: 8B52 | Up: Map | Next: 8BA5 |
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Position an alien or pickup sprite and draw it through MaskSprite.
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Position an alien or pickup sprite and draw it.
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| DrawObjectSprite | 8B73 | CALL ReloadMaskCache | Call ReloadMaskCache. | |||||||
| 8B76 | EXX | Switch to the shadow registers. | ||||||||
| 8B77 | CALL PositionMaskSprite | Call PositionMaskSprite. | ||||||||
| 8B7A | EXX | Switch back to the normal registers. | ||||||||
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Compare the cached Y position with the actor Y.
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| 8B7B | LD A,($5E56) | Subtract the actor Y from SpriteCachedY. | ||||||||
| 8B7E | SUB (IX+$04) | |||||||||
| 8B81 | JP Z,MaskSprite_TestRemaining | Jump to MaskSprite_TestRemaining if they match. | ||||||||
| 8B84 | JP M,DrawObjectSprite_ClipHeight | Jump to DrawObjectSprite_ClipHeight if the actor is below the cached position. | ||||||||
| 8B87 | LD C,A | Store the Y difference in the row counter. | ||||||||
| 8B88 | LD A,($5E5A) | Jump to MaskSprite_TestRemaining if the Y difference is greater than SpriteCachedRows. | ||||||||
| 8B8B | CP C | |||||||||
| 8B8C | JP C,MaskSprite_TestRemaining | |||||||||
| 8B8F | SUB C | Subtract it from SpriteCachedRows and jump to MaskSprite. | ||||||||
| 8B90 | LD ($5E5A),A | |||||||||
| 8B93 | JP MaskSprite | |||||||||
| DrawObjectSprite_ClipHeight | 8B96 | EXX | Switch register sets and negate the Y difference. | |||||||
| 8B97 | NEG | |||||||||
| 8B99 | LD C,A | |||||||||
| 8B9A | LD A,($5E59) | Jump to MaskSprite_FinishSprite if the Y difference is greater than SpriteRowsLeft. | ||||||||
| 8B9D | CP C | |||||||||
| 8B9E | JP C,MaskSprite_FinishSprite | |||||||||
| 8BA1 | SUB C | Subtract it from the row count and jump to MaskSprite_StoreRowCount. | ||||||||
| 8BA2 | JP MaskSprite_StoreRowCount | |||||||||
| Prev: 8B52 | Up: Map | Next: 8BA5 |
