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Routines |
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Used by the routine at HandlePlayerLegs.
Moves the player by one frame. The speeds along x and y are only set up while the player walks, is jumping or is entering the room, and they are cleared again afterwards. The speed along z has gravity taken off it, which is more if the player is not rising with the jump control held down. If the player lands the jump is over.
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Drop if the game is over.
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| MovePlayer | 49814 | LD A,(23332) | Fetch GameOverFlag. | |||||||
| 49817 | AND A | Jump to MovePlayer_Speed if the game is not over. | ||||||||
| 49818 | JR Z,MovePlayer_Speed | |||||||||
| 49820 | LD (IX+11),2 | Set the speed along the z axis to 2. | ||||||||
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Set the walk speeds unless the player is turning.
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| MovePlayer_Speed | 49824 | BIT 3,(IX+12) | Jump to MovePlayer_Forward if the player is jumping. | |||||||
| 49828 | JR NZ,MovePlayer_Forward | |||||||||
| 49830 | LD A,(IX+12) | Fetch the collision flags. | ||||||||
| 49833 | AND %11110000 | Keep only bits 4-7. | ||||||||
| 49835 | JR NZ,MovePlayer_Forward | Jump to MovePlayer_Forward if the player is entering the room. | ||||||||
| 49837 | BIT 3,(IX+0) | Jump to MovePlayer_Gravity if bit 3 of the sprite number is set. | ||||||||
| 49841 | JR NZ,MovePlayer_Gravity | |||||||||
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This entry point is used by the routine at HandleTurningLegs.
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| MovePlayer_WalkControl | 49843 | BIT 2,C | Jump to MovePlayer_Gravity if bit 2 of C is clear. | |||||||
| 49845 | JR Z,MovePlayer_Gravity | |||||||||
| MovePlayer_Forward | 49847 | PUSH BC | Stash BC on the stack. | |||||||
| 49848 | CALL SetPlayerSpeed | Call SetPlayerSpeed. | ||||||||
| 49851 | POP BC | Restore BC from the stack. | ||||||||
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This entry point is used by the routine at HandleTurningLegs.
Gravity takes one off the speed along z when the player is rising with the jump control held down, and two otherwise.
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| MovePlayer_Gravity | 49852 | LD A,(IX+11) | Fetch the speed along the z axis. | |||||||
| 49855 | AND A | Jump to MovePlayer_Fall if the player is falling. | ||||||||
| 49856 | JP M,MovePlayer_Fall | |||||||||
| 49859 | BIT 3,C | Jump to MovePlayer_Store if bit 3 of C is set. | ||||||||
| 49861 | JR NZ,MovePlayer_Store | |||||||||
| MovePlayer_Fall | 49863 | DEC A | Decrement A. | |||||||
| MovePlayer_Store | 49864 | DEC A | Decrement A. | |||||||
| 49865 | LD (IX+11),A | Store the speed along the z axis. | ||||||||
| 49868 | LD (23329),A | Set PreviousVerticalSpeed. | ||||||||
| 49871 | ADD A,2 | Add 2. | ||||||||
| 49873 | CALL M,PlaySoundFromHeight | Call PlaySoundFromHeight if the sign flag is set. | ||||||||
| 49876 | CALL BlockMovement | Call BlockMovement. | ||||||||
| 49879 | CALL HandleRoomExit | Call HandleRoomExit. | ||||||||
| 49882 | CALL MoveObject | Call MoveObject. | ||||||||
| 49885 | BIT 2,(IX+12) | Jump to ClearSpeed if the player is in the air. | ||||||||
| 49889 | JR Z,ClearSpeed | |||||||||
| 49891 | LD A,(23329) | Fetch PreviousVerticalSpeed. | ||||||||
| 49894 | AND A | Jump to ClearSpeed if the player was rising. | ||||||||
| 49895 | JP P,ClearSpeed | |||||||||
| 49898 | RES 3,(IX+12) | Clear the jumping flag. | ||||||||
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Continue on to ClearSpeed.
View the equivalent code in;
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