mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-11-08 16:07:14 +00:00
396 lines
5.1 KiB
ArmAsm
396 lines
5.1 KiB
ArmAsm
; FIXME: merge a lot of the target code
|
|
|
|
; Handle laser
|
|
|
|
; should handle multiple at once?
|
|
|
|
; when pressed, find empty slot?
|
|
; initially 10 wide, from gun to right or left
|
|
; expand to 20 wide
|
|
; stop when encounter door, enemy, or edge of screen
|
|
; should bounds check carefully
|
|
|
|
; should handle shooting while crouching
|
|
|
|
; in general, 0 for physicist, 1/2 for alien
|
|
|
|
MAX_LASERS = 3
|
|
|
|
; 0=not out, else out. ff=can't hurt
|
|
laser_out:
|
|
laser0_out: .byte $0
|
|
laser1_out: .byte $0
|
|
laser2_out: .byte $0
|
|
laser3_out: .byte $0
|
|
|
|
laser_start:
|
|
laser0_start: .byte $0
|
|
laser1_start: .byte $0
|
|
laser2_start: .byte $0
|
|
laser3_start: .byte $0
|
|
|
|
laser_end:
|
|
laser0_end: .byte $0
|
|
laser1_end: .byte $0
|
|
laser2_end: .byte $0
|
|
laser3_end: .byte $0
|
|
|
|
laser_y:
|
|
laser0_y: .byte $0
|
|
laser1_y: .byte $0
|
|
laser2_y: .byte $0
|
|
laser3_y: .byte $0
|
|
|
|
laser_direction:
|
|
laser0_direction: .byte $0
|
|
laser1_direction: .byte $0
|
|
laser2_direction: .byte $0
|
|
laser3_direction: .byte $0
|
|
|
|
laser_count:
|
|
laser0_count: .byte $0
|
|
laser1_count: .byte $0
|
|
laser2_count: .byte $0
|
|
laser3_count: .byte $0
|
|
|
|
;=========================
|
|
; fire laser
|
|
;=========================
|
|
|
|
fire_laser:
|
|
lda PHYSICIST_X
|
|
|
|
; adjust so laser pokes out from shield
|
|
|
|
ldx DIRECTION ; 0=left, 1=right
|
|
beq laser_facing_left
|
|
|
|
clc
|
|
adc #5 ; only add 5 if facing right
|
|
jmp laser_done_adjust
|
|
|
|
laser_facing_left:
|
|
sec
|
|
sbc #2 ; decrement 2 if facing left
|
|
|
|
laser_done_adjust:
|
|
sta COLLISION_X
|
|
|
|
lda PHYSICIST_Y
|
|
sta COLLISION_Y
|
|
|
|
lda laser0_out
|
|
bne done_fire_laser
|
|
|
|
; activate laser slot
|
|
|
|
inc laser0_out
|
|
|
|
; reset count
|
|
|
|
lda #0
|
|
sta laser0_count
|
|
|
|
; set y
|
|
|
|
lda PHYSICIST_Y
|
|
clc
|
|
adc #4
|
|
|
|
ldx PHYSICIST_STATE
|
|
cpx #P_CROUCH_SHOOTING
|
|
bne laser_crouch_done
|
|
laser_crouch:
|
|
clc
|
|
adc #4
|
|
laser_crouch_done:
|
|
sta laser0_y
|
|
|
|
; set direction
|
|
|
|
lda DIRECTION
|
|
sta laser0_direction
|
|
|
|
beq laser_left
|
|
bne laser_right
|
|
|
|
; set x
|
|
|
|
laser_left:
|
|
|
|
jsr calc_gun_left_collision
|
|
|
|
ldx PHYSICIST_X
|
|
dex
|
|
stx laser0_end
|
|
|
|
txa
|
|
sec
|
|
sbc #10
|
|
sta laser0_start
|
|
|
|
jmp done_fire_laser
|
|
|
|
laser_right:
|
|
|
|
jsr calc_gun_right_collision
|
|
|
|
lda PHYSICIST_X
|
|
clc
|
|
adc #5
|
|
sta laser0_start
|
|
|
|
clc
|
|
adc #10
|
|
sta laser0_end
|
|
|
|
done_fire_laser:
|
|
rts
|
|
|
|
|
|
|
|
|
|
;====================
|
|
; draw laser
|
|
;====================
|
|
|
|
draw_laser:
|
|
|
|
ldx #0
|
|
draw_laser_loop:
|
|
lda laser_out,X
|
|
beq done_draw_laser
|
|
|
|
txa
|
|
pha ; save X on stack
|
|
|
|
lda #$10
|
|
sta hlin_color_smc+1
|
|
|
|
lda #$0f
|
|
sta hlin_mask_smc+1
|
|
|
|
ldy laser_y,X
|
|
|
|
sec
|
|
lda laser_end,X
|
|
sbc laser_start,X
|
|
sta LASER_TEMP
|
|
|
|
lda laser_start,X
|
|
|
|
ldx LASER_TEMP
|
|
|
|
jsr hlin
|
|
|
|
pla ; restore X from stack
|
|
tax
|
|
|
|
done_draw_laser:
|
|
inx
|
|
cpx #MAX_LASERS
|
|
bne draw_laser_loop
|
|
|
|
rts
|
|
|
|
|
|
|
|
;===================
|
|
; move laser
|
|
;===================
|
|
move_laser:
|
|
ldx #0
|
|
|
|
move_laser_loop:
|
|
lda laser_out,X
|
|
beq done_move_laser
|
|
|
|
; slow down laser
|
|
lda laser_count,X
|
|
and #$3
|
|
bne no_move_laser
|
|
|
|
lda laser_direction,X
|
|
bne move_laser_right
|
|
|
|
move_laser_left:
|
|
|
|
lda laser_count,X
|
|
cmp #4
|
|
bcc still_starting_left
|
|
cmp #8
|
|
bcc still_shooting_left
|
|
|
|
continue_shooting_left:
|
|
still_shooting_left:
|
|
|
|
lda laser_end,X
|
|
sec
|
|
sbc #10
|
|
sta laser_end,X
|
|
|
|
still_starting_left:
|
|
|
|
lda laser_start,X
|
|
sec
|
|
sbc #10
|
|
sta laser_start,X
|
|
|
|
laser_edge_detect_left:
|
|
|
|
lda laser_end,X
|
|
cmp LEFT_SHOOT_LIMIT
|
|
bmi disable_laser_left
|
|
|
|
lda laser_start,X
|
|
cmp LEFT_SHOOT_LIMIT
|
|
bpl no_move_laser
|
|
|
|
lda LEFT_SHOOT_LIMIT
|
|
sta laser_start,X
|
|
|
|
jmp no_move_laser
|
|
|
|
|
|
move_laser_right:
|
|
|
|
lda laser_count,X
|
|
cmp #4
|
|
bcc still_starting_right
|
|
cmp #8
|
|
bcc still_shooting_right
|
|
|
|
continue_shooting_right:
|
|
lda laser_start,X
|
|
clc
|
|
adc #10
|
|
sta laser_start,X
|
|
|
|
still_shooting_right:
|
|
lda laser_end,X
|
|
clc
|
|
adc #10
|
|
sta laser_end,X
|
|
|
|
still_starting_right:
|
|
|
|
laser_edge_detect_right:
|
|
|
|
; detect if totally off screen
|
|
lda laser_start,X
|
|
cmp RIGHT_SHOOT_LIMIT
|
|
bcs disable_laser_right
|
|
|
|
lda laser_end,X
|
|
cmp RIGHT_SHOOT_LIMIT
|
|
bcc no_move_laser
|
|
|
|
lda RIGHT_SHOOT_LIMIT
|
|
sta laser_end,X
|
|
|
|
no_move_laser:
|
|
inc laser_count,X
|
|
|
|
done_move_laser:
|
|
inx
|
|
cpx #MAX_LASERS
|
|
bne move_laser_loop
|
|
|
|
rts
|
|
|
|
;===================
|
|
; hit something, left
|
|
;===================
|
|
disable_laser_left:
|
|
lda LEFT_SHOOT_TARGET
|
|
jmp hit_something_common
|
|
|
|
;====================
|
|
; hit something, right
|
|
;====================
|
|
disable_laser_right:
|
|
|
|
lda RIGHT_SHOOT_TARGET
|
|
|
|
|
|
;======================
|
|
; hit something, common
|
|
;======================
|
|
hit_something_common:
|
|
pha
|
|
|
|
; disable laser
|
|
lda #0
|
|
sta laser_out,X
|
|
|
|
pla
|
|
|
|
tay
|
|
and #$f0
|
|
|
|
cmp #TARGET_ALIEN
|
|
beq laser_hit_alien
|
|
|
|
cmp #TARGET_FRIEND
|
|
beq laser_hit_friend
|
|
|
|
cmp #TARGET_PHYSICIST
|
|
beq laser_hit_physicist
|
|
|
|
; FIXME: reduce shields if hit them?
|
|
|
|
jmp done_hit_something
|
|
|
|
laser_hit_alien:
|
|
|
|
tya
|
|
and #$f
|
|
tay
|
|
|
|
lda #A_DISINTEGRATING
|
|
sta alien_state,Y
|
|
|
|
lda #0
|
|
sta alien_gait,Y
|
|
|
|
jmp done_hit_something
|
|
|
|
laser_hit_friend:
|
|
|
|
lda #F_DISINTEGRATING
|
|
sta friend_state
|
|
|
|
lda #FAI_DISINTEGRATING
|
|
sta friend_ai_state
|
|
|
|
lda #0
|
|
sta friend_gait
|
|
|
|
jmp done_hit_something
|
|
|
|
laser_hit_physicist:
|
|
|
|
lda #P_DISINTEGRATING
|
|
sta PHYSICIST_STATE
|
|
|
|
lda #0
|
|
sta GAIT
|
|
|
|
done_hit_something:
|
|
jmp done_move_laser
|
|
; rts
|
|
|
|
|
|
;===============
|
|
; clear lasers
|
|
;===============
|
|
clear_lasers:
|
|
ldx #MAX_LASERS
|
|
lda #0
|
|
clear_laser_loop:
|
|
sta laser_out,X
|
|
dex
|
|
bne clear_laser_loop
|
|
|
|
rts
|