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Routines |
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Keep the flame (types 166/167 here, 162/163 via Handler_SidewaysMissileFlame_HangRight) attached to the missile held in the slot at Object_Slot_1. The flame is cleared if that slot no longer holds the missile.
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Hang this actor off the 164 slot at Object_Slot_1.
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| Handler_SidewaysMissileFlame | 45157 | LD A,(24840) | Fetch Object_Slot_1. | |||||
| 45160 | CP 164 | Jump to Handler_Missile_HideActor if the type is not 164. | ||||||
| 45162 | JR NZ,Handler_Missile_HideActor | |||||||
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Alternate the flame frame and colour.
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| 45164 | LD A,(IX+0) | Fetch the actor type. | ||||||
| 45167 | XOR %00000001 | Flip bit 0. | ||||||
| 45169 | LD (IX+0),A | Write it back. | ||||||
| 45172 | LD A,(IX+7) | Fetch the actor colour. | ||||||
| 45175 | XOR %00000100 | Flip bit 2. | ||||||
| 45177 | LD (IX+7),A | Write it back. | ||||||
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Match the flame Y to the missile Y.
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| 45180 | LD A,(24844) | Fetch 24844. | ||||||
| 45183 | LD (IX+4),A | Write it as the actor Y. | ||||||
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Place the flame to the left of the missile's world X.
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| 45186 | LD HL,(24842) | Fetch 24842. | ||||||
| 45189 | LD BC,24 | Set the offset in BC to 0024. | ||||||
| 45192 | AND A | Clear the carry flag. | ||||||
| 45193 | SBC HL,BC | Subtract the offset. | ||||||
| 45195 | LD A,H | Fetch the high byte. | ||||||
| 45196 | AND %00011111 | Keep only bits 0-4. | ||||||
| 45198 | LD H,A | Write it back. | ||||||
| 45199 | LD (IX+2),L | Write the low byte as the actor world X. | ||||||
| 45202 | LD (IX+3),H | Write the high byte. | ||||||
| 45205 | JP DrawCurrentActor_Draw | Jump to DrawCurrentActor_Draw. | ||||||
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The same hang, offset right, for type 160.
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| Handler_SidewaysMissileFlame_HangRight | 45208 | LD A,(24840) | Fetch Object_Slot_1. | |||||
| 45211 | CP 160 | Jump to Handler_Missile_HideActor if the type is not 160. | ||||||
| 45213 | JR NZ,Handler_Missile_HideActor | |||||||
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Alternate the flame frame and colour.
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| 45215 | LD A,(IX+0) | Fetch the actor type. | ||||||
| 45218 | XOR %00000001 | Flip bit 0. | ||||||
| 45220 | LD (IX+0),A | Write it back. | ||||||
| 45223 | LD A,(IX+7) | Fetch the actor colour. | ||||||
| 45226 | XOR %00000100 | Flip bit 2. | ||||||
| 45228 | LD (IX+7),A | Write it back. | ||||||
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Match the flame Y to the missile Y.
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| 45231 | LD A,(24844) | Fetch 24844. | ||||||
| 45234 | LD (IX+4),A | Write it as the actor Y. | ||||||
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Place the flame to the right of the missile's world X.
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| 45237 | LD HL,(24842) | Fetch 24842. | ||||||
| 45240 | LD BC,20 | Add a 20 offset. | ||||||
| 45243 | ADD HL,BC | |||||||
| 45244 | LD A,H | Fetch the high byte. | ||||||
| 45245 | AND %00011111 | Keep only bits 0-4. | ||||||
| 45247 | LD H,A | Write it back. | ||||||
| 45248 | LD (IX+2),L | Write the low byte as the actor world X. | ||||||
| 45251 | LD (IX+3),H | Write the high byte. | ||||||
| 45254 | JP DrawCurrentActor_Draw | Jump to DrawCurrentActor_Draw. | ||||||
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Free this flame's slot because the missile is gone.
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| Handler_Missile_HideActor | 45257 | CALL DrawCachedSprite | Call DrawCachedSprite. | |||||
| 45260 | LD (IX+0),0 | Write 0 to the actor type. | ||||||
| 45264 | RET | Return. | ||||||
| Prev: 45115 | Up: Map | Next: 45265 |