Knight Lore: Routine at 47525

47525: Handle Guard Or Wizard

Handles the top half of a guard or of the wizard, who patrol round the room, following the walls. The bottom half is the next object in the table and it is moved with the top half.

Input
IX	Address of the top half of the guard

Move the guard and keep the bottom half in step.

HandleGuardOrWizard

47525

CALL SetPixelAdjustments_GuardTop

Set the pixel adjustments of a guard.

47528

CALL ApplyGravityAndMove

Apply gravity to the guard and move it.

47531

CALL GetGuardSpeeds

Work out the speeds of the guard from its direction.

47534

LD (IX+9),L

Set the speed in X of the guard.

47537

LD (IX+41),L

Set the speed in X of the bottom half.

47540

LD (IX+10),H

Set the speed in Y of the guard.

47543

LD (IX+42),H

Set the speed in Y of the bottom half.

47546

LD A,(IX+1)

Fetch the X coordinate of the guard.

47549

LD (IX+33),A

Set the X coordinate of the bottom half.

47552

LD A,(IX+2)

Fetch the Y coordinate of the guard.

47555

LD (IX+34),A

Set the Y coordinate of the bottom half.

47558

CALL FaceDirectionOfMovement

Choose the graphic of the guard from its direction.

47561

JP SetDeadlyFlagsAndDraw

Make the guard deadly and flag it to be drawn again.