mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-11-19 12:32:35 +00:00
295 lines
3.8 KiB
ArmAsm
295 lines
3.8 KiB
ArmAsm
; Handle shield
|
|
|
|
; when pressed, find empty slot? Up to 3?
|
|
; gradually expire, flash when done
|
|
; should update the laser range when start/stop
|
|
; destroyed by blast. Weakened by laser?
|
|
|
|
MAX_SHIELDS = 3
|
|
|
|
shield_out:
|
|
shield0_out: .byte $0
|
|
shield1_out: .byte $0
|
|
shield2_out: .byte $0
|
|
|
|
shield_x:
|
|
shield0_x: .byte $0
|
|
shield1_x: .byte $0
|
|
shield2_x: .byte $0
|
|
|
|
shield_y:
|
|
shield0_y: .byte $0
|
|
shield1_y: .byte $0
|
|
shield2_y: .byte $0
|
|
|
|
shield_count:
|
|
shield0_count: .byte $0
|
|
shield1_count: .byte $0
|
|
shield2_count: .byte $0
|
|
|
|
;=========================
|
|
; activate_shield
|
|
;=========================
|
|
|
|
activate_shield:
|
|
|
|
lda SHIELD_OUT
|
|
cmp #MAX_SHIELDS
|
|
beq done_activate_shield
|
|
|
|
; find slot
|
|
ldx #0
|
|
activate_shield_loop:
|
|
lda shield_out,X
|
|
beq found_shield_slot
|
|
inx
|
|
bne activate_shield_loop ; bra
|
|
|
|
found_shield_slot:
|
|
|
|
; take the slot
|
|
|
|
inc SHIELD_OUT
|
|
inc shield_out,X
|
|
|
|
; reset count
|
|
|
|
lda #0
|
|
sta shield_count,X
|
|
|
|
; set y
|
|
|
|
lda PHYSICIST_Y
|
|
sta shield_y,X
|
|
|
|
; set x
|
|
lda DIRECTION
|
|
bne shield_right
|
|
|
|
shield_left:
|
|
|
|
ldy PHYSICIST_X
|
|
dey
|
|
tya
|
|
sta shield_x,X
|
|
|
|
jmp done_activate_shield
|
|
|
|
shield_right:
|
|
|
|
lda PHYSICIST_X
|
|
clc
|
|
adc #5
|
|
sta shield_x,X
|
|
|
|
done_activate_shield:
|
|
rts
|
|
|
|
|
|
;====================
|
|
; draw shields
|
|
;====================
|
|
|
|
draw_shields:
|
|
|
|
lda SHIELD_OUT
|
|
beq done_draw_shields
|
|
|
|
ldx #0
|
|
|
|
draw_shields_loop:
|
|
|
|
lda shield_out,X
|
|
beq draw_shields_loop_continue
|
|
|
|
lda shield_x,X
|
|
sta XPOS
|
|
lda shield_y,X
|
|
sta YPOS
|
|
|
|
ldy shield_count,X
|
|
|
|
lda shield_progression,Y
|
|
bmi destroy_shield
|
|
|
|
tay
|
|
|
|
lda FRAMEL
|
|
and #$7
|
|
bne dont_increment_shield
|
|
|
|
inc shield_count,X
|
|
|
|
dont_increment_shield:
|
|
|
|
lda shield_table_lo,Y
|
|
sta INL
|
|
lda shield_table_hi,Y
|
|
sta INH
|
|
|
|
txa
|
|
pha
|
|
|
|
jsr put_sprite
|
|
|
|
pla
|
|
tax
|
|
jmp draw_shields_loop_continue
|
|
|
|
destroy_shield:
|
|
lda #0
|
|
sta shield_out,X
|
|
dec SHIELD_OUT
|
|
|
|
draw_shields_loop_continue:
|
|
inx
|
|
cpx #MAX_SHIELDS
|
|
bne draw_shields_loop
|
|
|
|
done_draw_shields:
|
|
|
|
rts
|
|
|
|
;====================
|
|
; init shields
|
|
;====================
|
|
|
|
init_shields:
|
|
|
|
ldx #0
|
|
stx SHIELD_OUT
|
|
init_shields_loop:
|
|
|
|
lda #0
|
|
sta shield_out,X
|
|
|
|
inx
|
|
cpx #MAX_SHIELDS
|
|
bne init_shields_loop
|
|
|
|
rts
|
|
|
|
shield_progression:
|
|
.byte 0,1
|
|
.byte 2,3,2,3,2,3,2,3,2,3,2,3,2,3,2,3,2,3,2,3
|
|
.byte 2,3,2,3,2,3,2,3,2,3,2,3,2,3,2,3,2,3,2,3
|
|
.byte 4,5,4,5,4,5,4,5,4,5,4,5
|
|
.byte 4,5,4,5,4,5,4,5,4,5,4,5
|
|
.byte 6,7,6,7,6,7,6,7
|
|
.byte 6,7,6,7,6,7,6,7
|
|
.byte 0
|
|
.byte $FF
|
|
|
|
shield_table_hi:
|
|
.byte >shield_flash_sprite ; 0
|
|
.byte >shield_start_sprite ; 1
|
|
.byte >shield_high1_sprite ; 2
|
|
.byte >shield_high2_sprite ; 3
|
|
.byte >shield_medium1_sprite ; 4
|
|
.byte >shield_medium2_sprite ; 5
|
|
.byte >shield_low1_sprite ; 6
|
|
.byte >shield_low2_sprite ; 7
|
|
|
|
shield_table_lo:
|
|
.byte <shield_flash_sprite
|
|
.byte <shield_start_sprite
|
|
.byte <shield_high1_sprite
|
|
.byte <shield_high2_sprite
|
|
.byte <shield_medium1_sprite
|
|
.byte <shield_medium2_sprite
|
|
.byte <shield_low1_sprite
|
|
.byte <shield_low2_sprite
|
|
|
|
|
|
|
|
|
|
shield_flash_sprite:
|
|
.byte 1,8
|
|
.byte $f3
|
|
.byte $ff
|
|
.byte $ff
|
|
.byte $ff
|
|
.byte $ff
|
|
.byte $3f
|
|
.byte $AA
|
|
.byte $AA
|
|
|
|
shield_start_sprite:
|
|
.byte 1,8
|
|
.byte $11
|
|
.byte $11
|
|
.byte $11
|
|
.byte $11
|
|
.byte $11
|
|
.byte $11
|
|
.byte $11
|
|
.byte $11
|
|
|
|
shield_high1_sprite:
|
|
.byte 1,8
|
|
.byte $BA
|
|
.byte $3A
|
|
.byte $A1
|
|
.byte $A1
|
|
.byte $BA
|
|
.byte $A3
|
|
.byte $BA
|
|
.byte $13
|
|
|
|
shield_high2_sprite:
|
|
.byte 1,8
|
|
.byte $3A
|
|
.byte $1A
|
|
.byte $3A
|
|
.byte $AA
|
|
.byte $AB
|
|
.byte $3A
|
|
.byte $1B
|
|
.byte $3A
|
|
|
|
shield_medium1_sprite:
|
|
.byte 1,8
|
|
.byte $A1
|
|
.byte $AA
|
|
.byte $1B
|
|
.byte $AA
|
|
.byte $A3
|
|
.byte $AA
|
|
.byte $3A
|
|
.byte $BA
|
|
|
|
shield_medium2_sprite:
|
|
.byte 1,8
|
|
.byte $AB
|
|
.byte $AA
|
|
.byte $A3
|
|
.byte $A3
|
|
.byte $AA
|
|
.byte $B3
|
|
.byte $AA
|
|
.byte $1A
|
|
|
|
shield_low1_sprite:
|
|
.byte 1,8
|
|
.byte $A3
|
|
.byte $AB
|
|
.byte $AA
|
|
.byte $3A
|
|
.byte $AA
|
|
.byte $AA
|
|
.byte $1A
|
|
.byte $AA
|
|
|
|
shield_low2_sprite:
|
|
.byte 1,8
|
|
.byte $A1
|
|
.byte $AA
|
|
.byte $AA
|
|
.byte $A1
|
|
.byte $AA
|
|
.byte $AA
|
|
.byte $A3
|
|
.byte $AB
|
|
|
|
|