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Routines |
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Used by the routine at UpdateSpawnPoints.
Makes an entity from a spawn point, provided that the random number is odd. When it is created the spawn point is made to wait for 7 frames before it may create another entity. The entity which is made depends on its type: the code for types 0 8 and 14 is different.
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| CreateSpawnedEntity | 38830 | CALL GetRandomNumber | Call GetRandomNumber to get a random number. | |||||||
| 38833 | LD A,(24474) | Fetch the low byte of the seed. | ||||||||
| 38836 | AND %00000001 | Keep only bit 0. | ||||||||
| 38838 | JP Z,UpdateSpawnPoints_Next | Jump to UpdateSpawnPoints_Next if it is zero, to leave this spawn point for now. | ||||||||
| 38841 | CALL ClearEntity | Call ClearEntity to clear the entity. | ||||||||
| 38844 | LD A,(IY+3) | Fetch the type from the kind. | ||||||||
| 38847 | LD (IX+0),A | Set the type of the entity. | ||||||||
| 38850 | LD A,(IY+4) | Fetch the first size from the kind. | ||||||||
| 38853 | LD (IX+11),A | Set the x extent. | ||||||||
| 38856 | LD A,(IY+5) | Fetch the second size from the kind. | ||||||||
| 38859 | LD (IX+12),A | Set the y extent. | ||||||||
| 38862 | LD A,(IY+6) | Fetch the third size from the kind. | ||||||||
| 38865 | LD (IX+13),A | Set the z extent. | ||||||||
| 38868 | POP IY | Restore the address of the spawn point from the stack. | ||||||||
| 38870 | LD (IY+5),7 | Set the delay of the spawn point to 7. | ||||||||
| 38874 | LD A,(IY+0) | Fetch the first byte of the position from the spawn point. | ||||||||
| 38877 | LD (IX+3),A | Set the low byte of the x coordinate. | ||||||||
| 38880 | LD A,(IY+1) | Fetch the second byte of the position from the spawn point. | ||||||||
| 38883 | LD (IX+2),A | Set the high byte of the x coordinate. | ||||||||
| 38886 | LD A,(IY+2) | Fetch the third byte of the position from the spawn point. | ||||||||
| 38889 | LD (IX+6),A | Set the low byte of the y coordinate. | ||||||||
| 38892 | LD A,(IY+3) | Fetch the fourth byte of the position from the spawn point. | ||||||||
| 38895 | LD (IX+5),A | Set the high byte of the y coordinate. | ||||||||
| 38898 | LD A,(IY+4) | Fetch the fifth byte of the position from the spawn point. | ||||||||
| 38901 | LD (IX+9),A | Set the middle byte of the z coordinate. | ||||||||
| 38904 | LD (IX+8),1 | Set the top byte of the z coordinate to 1. | ||||||||
| 38908 | LD A,(IX+0) | Fetch the type of the entity. | ||||||||
| 38911 | AND A | Test it. | ||||||||
| 38912 | JR Z,CreateSpawnedEntity_Creature | Jump to CreateSpawnedEntity_Creature if the type is 0. | ||||||||
| 38914 | CP 8 | Jump to CreateSpawnedEntity_GrowingBubble if the type is 8. | ||||||||
| 38916 | JR Z,CreateSpawnedEntity_GrowingBubble | |||||||||
| 38918 | CP 14 | Jump to CreateShot if the type is 14. | ||||||||
| 38920 | JR Z,CreateShot | |||||||||
| 38922 | LD (IX+35),0 | Set field 35 of the entity to 0. | ||||||||
| 38926 | LD (IX+28),4 | Set field 28 of the entity to 4. | ||||||||
| 38930 | LD (IX+29),16 | Set field 29 of the entity to 16. | ||||||||
| 38934 | CALL SetEntitySize | Call SetEntitySize to set the sprite of the entity. | ||||||||
| 38937 | SET 4,(IX+22) | Set bit 4 of field 22 of the entity. | ||||||||
| 38941 | JP UpdateSpawnPoints_Advance | Jump to UpdateSpawnPoints_Advance to go on to the next spawn point. | ||||||||
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