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duke: enemies sorta animated

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This commit is contained in:
Vince Weaver 2020-12-16 00:25:58 -05:00
parent d11f015618
commit e91572962f
2 changed files with 50 additions and 8 deletions
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2
duke/duke.s
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@ -150,7 +150,7 @@ duke_loop:
jsr move_duke jsr move_duke
jsr move_enemies ; jsr move_enemies
jsr move_laser jsr move_laser

56
duke/enemies.s
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@ -1,14 +1,54 @@
NUM_ENEMIES = 4 NUM_ENEMIES = 4
;======================= ;=======================
; move enemies ; move enemy
;======================= ;=======================
move_enemies: ; which one is in Y
move_enemy:
lda enemy_data+ENEMY_DATA_TYPE,Y
and #$fc
cmp #ENEMY_CAMERA
beq aim_camera
; FIXME: actually move them
move_bot:
move_crawler:
lda FRAMEL
and #$f
bne done_move_enemy
lda enemy_data+ENEMY_DATA_TYPE,Y
eor #$2
sta enemy_data+ENEMY_DATA_TYPE,Y
jmp done_move_enemy
aim_camera:
lda DUKE_X
lsr
clc
adc TILEMAP_X
cmp enemy_data+ENEMY_DATA_TILEX,Y
bcc aim_camera_left
aim_camera_right:
lda #2
sta enemy_data+ENEMY_DATA_TYPE,Y
jmp done_move_enemy
aim_camera_left:
lda #0
sta enemy_data+ENEMY_DATA_TYPE,Y
done_move_enemy:
rts rts
;======================= ;=======================
; draw enemies ; draw and move enemies
;======================= ;=======================
draw_enemies: draw_enemies:
@ -78,6 +118,8 @@ draw_enemies_loop:
pla pla
tay tay
jsr move_enemy
done_draw_enemy: done_draw_enemy:
tya tya
@ -101,13 +143,13 @@ enemy_sprites:
enemy_bot_sprite1: enemy_bot_sprite1:
.byte 2,2 .byte 2,2
.byte $A5,$53 .byte $Ae,$e3
.byte $65,$05 .byte $6e,$0e
enemy_bot_sprite2: enemy_bot_sprite2:
.byte 2,2 .byte 2,2
.byte $53,$A5 .byte $e3,$Ae
.byte $05,$55 .byte $0e,$6e
enemy_crawler_sprite1: enemy_crawler_sprite1:
.byte 2,2 .byte 2,2