Routines
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44307: Handle Egg Top
The handler for the top half of a broken egg (object 73), which is deadly to touch. Only one is active at a time (EggTopFlag is set), and none are while EggTopDisabledFlag is set. An inactive egg top becomes active with a chance of one in sixteen on each frame. While it is active it is moved with gravity and makes a sound when it lands. Until then it hangs in the air.
Input
IX The address of the object
Hang in the air until this egg is chosen to drop.
HandleEggTop 44307 CALL SetDeadlyFlags Call SetDeadlyFlags.
44310 CALL SetPixelAdjustments_Appearing Call SetPixelAdjustments_Appearing.
44313 LD A,(23355) Return if EggTopDisabledFlag is set.
44316 AND A
44317 RET NZ
44318 BIT 2,(IX+13) Jump to HandleEggTop_MoveActive if this egg top is already active.
44322 JR NZ,HandleEggTop_MoveActive
44324 LD HL,23354 Point HL at EggTopFlag.
44327 LD A,(HL) Return if EggTopFlag is set.
44328 AND A
44329 RET NZ
44330 LD A,(23301) Fetch RandomSeed2.
44333 CP 16 Return unless it is less than 16.
44335 RET NC
44336 SET 2,(IX+13) Set bit 2 of the state.
44340 LD (HL),1 Write 1 to EggTopFlag.
44342 RET Return.
The egg top is active, so let it fall.
HandleEggTop_MoveActive 44343 CALL ApplyGravityAndMove Call ApplyGravityAndMove.
44346 CALL PlayLandingSoundOnce Call PlayLandingSoundOnce.
44349 BIT 2,(IX+12) Jump to HandleEggTop_Landed if it has landed.
44353 JR NZ,HandleEggTop_Landed
44355 CALL PlaySoundFromHeight Call PlaySoundFromHeight.
HandleEggTop_Redraw 44358 JP SetWipeAndDrawFlags Jump to SetWipeAndDrawFlags.
The egg top has landed, so another one may drop.
HandleEggTop_Landed 44361 RES 2,(IX+13) Reset bit 2 of the state.
44365 LD HL,23354 Point HL at EggTopFlag.
44368 LD (HL),0 Write 0 to EggTopFlag.
44370 JR HandleEggTop_Redraw Jump to HandleEggTop_Redraw.
View the equivalent code in;
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