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Routines |
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Moves a repellent spray 4 pixels at a time in the direction it was fired. The spray is removed if it hits a bug (see CheckWeaponHit) or reaches the edge of the play area.
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| UpdateRepellentSpray | 27023 | CALL StoreEntity | Remember the position and state using StoreEntity. | |||||
| 27026 | LD A,(IX+5) | Jump to RemoveWeapon to remove the spray if it has hit a bug. | ||||||
| 27029 | AND A | |||||||
| 27030 | JR NZ,RemoveWeapon | |||||||
| 27032 | LD A,4 | A=4 (the distance to move). | ||||||
| 27034 | BIT 6,(IX+0) | Jump to UpdateRepellentSpray_Move if the spray is moving right (bit 6 is not set). | ||||||
| 27038 | JR Z,UpdateRepellentSpray_Move | |||||||
| 27040 | NEG | Negate the distance (move left). | ||||||
| UpdateRepellentSpray_Move | 27042 | ADD A,(IX+1) | Add the X position of the spray. | |||||
| 27045 | CP 24 | Jump to RemoveWeapon to remove the spray if it is past the left edge. | ||||||
| 27047 | JR C,RemoveWeapon | |||||||
| 27049 | CP 224 | Jump to RemoveWeapon to remove the spray if it is past the right edge. | ||||||
| 27051 | JR NC,RemoveWeapon | |||||||
| 27053 | LD (IX+1),A | Write the new X position. | ||||||
| 27056 | JP DrawObject | Jump to DrawObject to draw the spray. | ||||||
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