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Routines |
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Used by the routine at HandleGhost.
Chooses the graphic of the ghost from the direction in which it moves, by setting bit 1 of the graphic number and the flag that flips the sprite. Of the two speeds the larger decides it.
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Choose the graphic from the larger of the two speeds.
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| SetGhostDirectionGraphic | C603 | LD A,(IX+$09) | Fetch the speed in X. | |||||
| C606 | AND A | Test it. | ||||||
| C607 | JP P,SetGhostDirectionGraphic_Y | Jump to SetGhostDirectionGraphic_Y if it is positive. | ||||||
| C60A | NEG | Make it positive. | ||||||
| SetGhostDirectionGraphic_Y | C60C | LD C,A | Stash it in C. | |||||
| C60D | LD A,(IX+$0A) | Fetch the speed in Y. | ||||||
| C610 | AND A | Test it. | ||||||
| C611 | JP P,SetGhostDirectionGraphic_Compare | Jump to SetGhostDirectionGraphic_Compare if it is positive. | ||||||
| C614 | NEG | Make it positive. | ||||||
| SetGhostDirectionGraphic_Compare | C616 | CP C | Compare the speed in X with the speed in Y. | |||||
| C617 | JR NC,SetGhostDirectionGraphic_MoreInY | Jump to SetGhostDirectionGraphic_MoreInY if the ghost moves more in Y than in X. | ||||||
| C619 | LD A,(IX+$09) | Fetch the speed in X. | ||||||
| C61C | AND A | Test it. | ||||||
| C61D | JP M,SetGhostDirectionGraphic_SecondPair | Jump to SetGhostDirectionGraphic_SecondPair if it is negative. | ||||||
| C620 | RES 1,(IX+$00) | Select the first pair of graphics. | ||||||
| SetGhostDirectionGraphic_SetFlip | C624 | SET 6,(IX+$07) | Flip the sprite. | |||||
| C628 | RET | Return. | ||||||
| SetGhostDirectionGraphic_SecondPair | C629 | SET 1,(IX+$00) | Select the second pair of graphics. | |||||
| C62D | JR SetGhostDirectionGraphic_SetFlip | Jump to SetGhostDirectionGraphic_SetFlip. | ||||||
| SetGhostDirectionGraphic_MoreInY | C62F | LD A,(IX+$0A) | Fetch the speed in Y. | |||||
| C632 | AND A | Test it. | ||||||
| C633 | JP M,SetGhostDirectionGraphic_FirstPair | Jump to SetGhostDirectionGraphic_FirstPair if it is negative. | ||||||
| C636 | SET 1,(IX+$00) | Select the second pair of graphics. | ||||||
| SetGhostDirectionGraphic_ClearFlip | C63A | RES 6,(IX+$07) | Stop the sprite from being flipped. | |||||
| C63E | RET | Return. | ||||||
| SetGhostDirectionGraphic_FirstPair | C63F | RES 1,(IX+$00) | Select the first pair of graphics. | |||||
| C643 | JR SetGhostDirectionGraphic_ClearFlip | Jump to SetGhostDirectionGraphic_ClearFlip. | ||||||
| Prev: C5C8 | Up: Map | Next: C645 |