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Routines |
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Used by the routine at UpdateChasingObject.
Part of UpdateChasingObject. Redraws the object, moves it, counts down its lifetime and gives it a position.
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| UpdateObject | 37773 | CALL ResetSprites | Reset the collision state. | |||||
| 37776 | BIT 7,(IX+16) | Test bit 7 of the flags of the object. | ||||||
| 37780 | CALL NZ,PrepareErase | Call PrepareErase if it is set. | ||||||
| 37783 | RES 6,(IX+16) | Clear bit 6 of the flags of the object. | ||||||
| 37787 | EXX | Switch registers. | ||||||
| 37788 | CALL AccelerateObject | Move the object. | ||||||
| 37791 | CALL SetFacing | Set the facing of the object. | ||||||
| 37794 | DEC (IX+21) | Count down the lifetime of the object. | ||||||
| 37797 | JR NZ,UpdateObject_Flags | Jump to UpdateObject_Flags if it has not run out. | ||||||
| UpdateObject_Remove | 37799 | LD (IX+0),255 | Free the slot. | |||||
| 37803 | JP UpdateObject_Finish | Jump to UpdateObject_Finish. | ||||||
| UpdateObject_Flags | 37806 | BIT 4,(IX+16) | Jump to UpdateObject_Remove if bit 4 of the flags of the object is set. | |||||
| 37810 | JR NZ,UpdateObject_Remove | |||||||
| 37812 | LD BC,2832 | BC=2832. | ||||||
| 37815 | CALL MoveObjectBackAndForth | Nudge the object and reverse its speeds. | ||||||
| 37818 | LD HL,(52823) | Fetch the map position from MapPosition. | ||||||
| 37821 | LD B,0 | Clear B. | ||||||
| 37823 | LD A,L | Fetch the map column. | ||||||
| 37824 | CP (IX+1) | Compare it with the map column of the object. | ||||||
| 37827 | JR Z,UpdateObject_Zone | Jump to UpdateObject_Zone if they are the same. | ||||||
| 37829 | INC B | Add two to B. | ||||||
| 37830 | INC B | |||||||
| UpdateObject_Zone | 37831 | LD A,H | Fetch the map zone. | |||||
| 37832 | CP (IX+4) | Compare it with the map zone of the object. | ||||||
| 37835 | JR Z,UpdateObject_Table | Jump to UpdateObject_Table if they are the same. | ||||||
| 37837 | INC B | Add one to B. | ||||||
| UpdateObject_Table | 37838 | LD A,B | A=B. | |||||
| 37839 | LD HL,56465 | Use the table at VisibleTiles. | ||||||
| 37842 | CALL AddAToHL | Add the offset to the address. | ||||||
| 37845 | LD A,(HL) | Fetch the entry. | ||||||
| 37846 | CP 62 | Jump to UpdateObject_Draw if it is not 62. | ||||||
| 37848 | JR NZ,UpdateObject_Draw | |||||||
| 37850 | LD A,(IX+2) | Fetch the horizontal position of the object. | ||||||
| 37853 | CP 24 | Jump to UpdateObject_Draw if it is lower than 24. | ||||||
| 37855 | JR C,UpdateObject_Draw | |||||||
| 37857 | CP 216 | Jump to UpdateObject_Draw if it is 216 or higher. | ||||||
| 37859 | JR NC,UpdateObject_Draw | |||||||
| 37861 | LD (IX+5),106 | Set the vertical position of the object to 106. | ||||||
| UpdateObject_Draw | 37865 | CALL PrepareDraw | Draw the object. | |||||
| UpdateObject_Finish | 37868 | CALL DrawObject | Call DrawObject. | |||||
| 37871 | JP SetObjectAttributes | Jump to SetObjectAttributes. | ||||||
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