|
Routines |
| Prev: 50632 | Up: Map | Next: 50757 |
|
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.
|
||||||||
|
Choose the graphic from the larger of the two speeds.
|
||||||||
| SetGhostDirectionGraphic | 50691 | LD A,(IX+9) | Fetch the speed in X. | |||||
| 50694 | AND A | Test it. | ||||||
| 50695 | JP P,SetGhostDirectionGraphic_Y | Jump to SetGhostDirectionGraphic_Y if it is positive. | ||||||
| 50698 | NEG | Make it positive. | ||||||
| SetGhostDirectionGraphic_Y | 50700 | LD C,A | Stash it in C. | |||||
| 50701 | LD A,(IX+10) | Fetch the speed in Y. | ||||||
| 50704 | AND A | Test it. | ||||||
| 50705 | JP P,SetGhostDirectionGraphic_Compare | Jump to SetGhostDirectionGraphic_Compare if it is positive. | ||||||
| 50708 | NEG | Make it positive. | ||||||
| SetGhostDirectionGraphic_Compare | 50710 | CP C | Compare the speed in X with the speed in Y. | |||||
| 50711 | JR NC,SetGhostDirectionGraphic_MoreInY | Jump to SetGhostDirectionGraphic_MoreInY if the ghost moves more in Y than in X. | ||||||
| 50713 | LD A,(IX+9) | Fetch the speed in X. | ||||||
| 50716 | AND A | Test it. | ||||||
| 50717 | JP M,SetGhostDirectionGraphic_SecondPair | Jump to SetGhostDirectionGraphic_SecondPair if it is negative. | ||||||
| 50720 | RES 1,(IX+0) | Select the first pair of graphics. | ||||||
| SetGhostDirectionGraphic_SetFlip | 50724 | SET 6,(IX+7) | Flip the sprite. | |||||
| 50728 | RET | Return. | ||||||
| SetGhostDirectionGraphic_SecondPair | 50729 | SET 1,(IX+0) | Select the second pair of graphics. | |||||
| 50733 | JR SetGhostDirectionGraphic_SetFlip | Jump to SetGhostDirectionGraphic_SetFlip. | ||||||
| SetGhostDirectionGraphic_MoreInY | 50735 | LD A,(IX+10) | Fetch the speed in Y. | |||||
| 50738 | AND A | Test it. | ||||||
| 50739 | JP M,SetGhostDirectionGraphic_FirstPair | Jump to SetGhostDirectionGraphic_FirstPair if it is negative. | ||||||
| 50742 | SET 1,(IX+0) | Select the second pair of graphics. | ||||||
| SetGhostDirectionGraphic_ClearFlip | 50746 | RES 6,(IX+7) | Stop the sprite from being flipped. | |||||
| 50750 | RET | Return. | ||||||
| SetGhostDirectionGraphic_FirstPair | 50751 | RES 1,(IX+0) | Select the first pair of graphics. | |||||
| 50755 | JR SetGhostDirectionGraphic_ClearFlip | Jump to SetGhostDirectionGraphic_ClearFlip. | ||||||
| Prev: 50632 | Up: Map | Next: 50757 |