Nightshade: Routine at 49283

The routine for objects of type 112 to 127, the creatures. A creature wanders about the village and hurts the player if it touches. It vanishes when the player is more than three cells away. When a shot hits it, the kind of the shot and the kind of the creature are added together to choose one of four things to happen to it (see HitOutcomeTable).

The routine for objects of type 112 to 127, the creatures. A creature wanders about the village and hurts the player if it touches. It vanishes when the player is more than three cells away. When a shot hits it, the kind of the shot and the kind of the creature are added together to choose one of four things to happen to it (see HitOutcomeTable).
UpdateCreature	49283	LD A,(IX+5)	Set the velocity of the creature from its speed and the way it faces.
	49286	CALL SetVelocityFromSpeed
	49289	CALL TestMove	Check whether the creature has run into the scenery.
	49292	BIT 0,(IX+7)	Check whether it did.
	49296	CALL NZ,PlayBumpSound	Play the bump sound if it did.
	49299	RES 1,(IX+7)	Clear the flag that shows that the creature has been drawn, ready for the next frame.
	49303	CALL MoveObject	Move the creature.
	49306	CALL UpdateDirection	Turn the creature to a new direction if it has gone far enough in this one.
	49309	CALL SetSpriteFromDirection	Choose the picture of the creature from the way it faces.
	49312	LD C,3	Set the distance at which the creature gives up to 3 cells.
	49314	CALL CheckPlayerClose	Check whether the creature is close to the player.
	49317	JR NC,UpdateCreature_Vanish	Jump to UpdateCreature_Vanish if the player is further away than that.
	49319	CALL CheckShotHit	Check whether a shot has hit the creature.
	49322	JR C,UpdateCreature_Hit	Jump to UpdateCreature_Hit if one has.
	49324	CALL CheckPlayerCollision	Check whether the creature is touching the player.
	49327	RET NC	Return if it is not.
	49328	LD BC,37	Set the points that touching a creature costs.
	49331	CALL AddToScore	Add the points to the score.
	49334	JP HurtPlayer	Hurt the player (see HurtPlayer).
A shot has hit the creature. Add together the kind of the creature and the kind of the shot (its type divided by four) to choose what happens.
UpdateCreature_Hit	49337	LD A,(IX+0)	Work out the kind of the creature, by dividing its type by four.
	49340	SRL A
	49342	SRL A
	49344	LD C,A	Keep it in C.
	49345	LD A,(IY+0)	Work out the kind of the shot, by dividing its type by four.
	49348	SRL A
	49350	SRL A
	49352	ADD A,C	Add the two kinds together.
	49353	AND %00000011	Keep the result between 0 and 3.
	49355	LD BC,49361	Point at the table of outcomes.
	49358	JP JumpToTableRoutine	Jump to the outcome that was chosen.