Gunfright: Routine at 47088

47088: Set Frame And Flip

Used by the routine at HandleBystander.

Chooses the frame of a walking figure and whether its sprite is flipped, from the direction in which it is walking and the view. Bits 6 and 7 of byte 6 of the object hold the direction.

Input
IX	The address of the object

Choose the frame from the direction and the view.

SetFrameAndFlip

47088

LD A,(41576)

Fetch the view number and keep it in B.

47091

LD B,A

47092

LD A,(IX+6)

Fetch the direction.

47095

SUB 64

Take one off the direction.

47097

RLCA

Move bit 7 into bit 0.

47098

AND %00000001

Keep bit 0.

47100

XOR B

Combine it with the view.

47101

LD (IX+12),A

Set the frame.

Set the flip bit from the direction.

47104

LD A,(IX+6)

Fetch the direction.

47107

AND %01000000

Keep bit 6.

47109

LD C,A

Keep the flip bit in C.

47110

LD A,(IX+7)

Fetch the flags.

47113

AND %10111111

Clear bit 6.

47115

OR C

Set bit 6 if the direction says so.

47116

LD (IX+7),A

Store the flags.

47119

RET

Return.