Tranz Am: Routine at 28929

28929: Erase Actor Sprite

Used by the routines at 25404, 26163 and 28588.

Input
IX	Actor Entity

ActorEraseMovedSprite

28929

LD A,(24098)

Jump to 29001 if 24098 is zero.

28932

AND A

28933

JP Z,29001

28936

CALL FindActorSpriteAndUpdate

Call FindActorSpriteAndUpdate.

28939

EXX

28940

CALL ActorFindPosDir

Call ActorFindPosDir.

28943

LD A,(24097)

A=Actor_Position_Y.

28946

SUB (IX+2)

Subtract the actor Y position.

28949

JP Z,ActorUpdateSize

Jump to ActorUpdateSize if the result is zero.

28952

JP M,ActorEraseMovedSprite_0

Jump to ActorEraseMovedSprite_0 if the result is negative.

28955

LD C,A

Else store the result in C.

28956

LD A,(24101)

A=CurrentSpriteHeight.

28959

CP C

Jump to ActorUpdateSize if A < C.

28960

JP C,ActorUpdateSize

28963

SUB C

28964

LD (24101),A

Store the result at CurrentSpriteHeight.

28967

Jump to MaskSprite.

ActorEraseMovedSprite_0

28970

EXX

28971

NEG

28973

LD C,A

28974

LD A,(24102)

28977

CP C

28978

JP C,ActorUpdateSizeFlipReg

28981

SUB C

28982

JP ActorUpdateHeightAndMask

Jump to ActorUpdateHeightAndMask.