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Laser_sight_check: ; BC = XY of the enemy. D is unchanged. Direction to face in E (or 0 if not)
LD A, E
DEC A
DEC D
XOR D
INC D
CP $00
JR Z, =.attack
BIT 1, A
JR NZ, =.attack
LD A, E
OR $00
LD D, A
RET
.attack:
LD E, $00
; straight line + distance <= 4
LD A, $mem_bunny_predicted_x
CP B
JR Z, =.vertical_distance_check
LD A, $mem_bunny_predicted_y
CP C
RET NZ
.horizontal_distance_check:
LD A, $mem_bunny_predicted_x
CP B
JR C, =.left
.right:
SUB $05
CP B
RET NC
LD E, $enum_direction_right
RET
.left:
ADD $04
CP B
RET C
LD E, $enum_direction_left
RET
.vertical_distance_check:
LD A, $mem_bunny_predicted_y
CP C
JR C, =.up
.down:
SUB $05
CP C
RET NC
LD E, $enum_direction_down
RET
.up:
ADD $04
CP C
RET C
LD E, $enum_direction_up
RET
Laser_Enemy_Attack: ; Direction to face in E. Result in BC (XY), Direction in D
PUSH DE
PUSH BC
LD A, E
DEC A
AND $03
SWAP A
SLA A
SLA A
OR $03 ; Laser_Animation
LD D, A
LD A, C
ADD B
LD B, A
LD A, $mem_bunny_x
LD C, A
LD A, $mem_bunny_y
ADD C
SUB B
.ABS
SWAP A
LD E, A
POP BC
LD A, D
LD D, $10
CALL =Try_Launch_Animation
LD A, $enum_animation_wait_mode
LD $mem_requested_mode, A
LD $mem_current_mode, A
CALL =Update_VBlank_Handler
LD A, E
SUB $f
LD E, A
LD A, $mem_animation_wait_frames
CP E
JR NC, =.skip_animation_wait_frames_update
LD A, E
LD $mem_animation_wait_frames, A
.skip_animation_wait_frames_update:
LD A, $mem_animation_wait_frames
POP DE
LD A, $mem_bunny_health
SUB $01
JR C, =.health_underflow_fix
DAA
LD $mem_bunny_health, A
JR =.Skip_health_underflow_fix
.health_underflow_fix:
LD A, $00
LD $mem_bunny_health, A
.Skip_health_underflow_fix:
RET
|
