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https://github.com/deater/dos33fsprogs.git
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ootw: c4: alien now appears
note: blends in with background :(
This commit is contained in:
Vince Weaver
parent
24f4205ad9
commit
2659de34b2
143
ootw/alien.s
143
ootw/alien.s
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@ -1,39 +1,60 @@
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; draw/move the bad guy aliens
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alien_state:
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alien0:
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MAX_ALIENS = 3
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alien_out:
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alien0_out: .byte 0
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alien0_x: .byte 0
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alien0_y: .byte 0
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alien0_state: .byte 0
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alien0_gait: .byte 0
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alien0_direction: .byte 0
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alien0_gun: .byte 0
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alien1:
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alien1_out: .byte 0
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alien2_out: .byte 0
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alien_room:
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alien0_room: .byte 0
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alien1_room: .byte 0
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alien2_room: .byte 0
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alien_x:
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alien0_x: .byte 0
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alien1_x: .byte 0
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alien2_x: .byte 0
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alien_y:
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alien0_y: .byte 0
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alien1_y: .byte 0
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alien2_y: .byte 0
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alien_state:
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alien0_state: .byte 0
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alien1_state: .byte 0
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alien2_state: .byte 0
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A_STANDING = 0
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A_WALKING = 1
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A_RUNNING = 2
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A_CROUCHING = 3
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A_TURNING = 4
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A_YELLING = 5
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A_SHOOTING_UP = 6
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A_DISINTEGRATING = 7
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alien_gait:
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alien0_gait: .byte 0
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alien1_gait: .byte 0
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alien2_gait: .byte 0
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alien_direction:
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alien0_direction: .byte 0
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alien1_direction: .byte 0
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alien2_direction: .byte 0
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alien_gun:
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alien0_gun: .byte 0
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alien1_gun: .byte 0
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alien2_gun: .byte 0
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ALIEN_OUT = 0
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ALIEN_X = 1
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ALIEN_Y = 2
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ALIEN_STATE = 3
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ALIEN_GAIT = 4
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ALIEN_DIRECTION = 5
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ALIEN_GUN = 6
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A_STANDING = 0
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A_WALKING = 1
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A_RUNNING = 2
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A_CROUCHING = 3
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A_TURNING = 4
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A_YELLING = 5
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A_SHOOTING_UP = 6
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;=======================================
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; Move alien based on current state
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@ -43,10 +64,10 @@ move_alien:
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; FIXME: loop through all alieans
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ldx #0
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lda alien_state+ALIEN_OUT,X
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lda alien_out,X
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beq done_move_alien
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lda alien_state+ALIEN_STATE,X
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lda alien_state,X
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cmp #A_WALKING
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beq move_alien_walking
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@ -62,47 +83,47 @@ done_move_alien:
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;======================
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; yelling
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move_alien_yelling:
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inc alien_state+ALIEN_GAIT,X ; cycle through animation
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inc alien_gait,X ; cycle through animation
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rts
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;======================
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; walking
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move_alien_walking:
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inc alien_state+ALIEN_GAIT,X ; cycle through animation
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inc alien_gait,X ; cycle through animation
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lda alien_state+ALIEN_GAIT,X
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lda alien_gait,X
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and #$f
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cmp #$8 ; only walk roughly 1/8 of time
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bne alien_no_move_walk
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lda alien_state+ALIEN_DIRECTION,X
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lda alien_direction,X
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beq a_walk_left
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inc alien_state+ALIEN_X,X ; walk right
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inc alien_x,X ; walk right
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rts
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a_walk_left:
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dec alien_state+ALIEN_X,X ; walk left
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dec alien_x,X ; walk left
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alien_no_move_walk:
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rts
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;======================
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; running
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move_alien_running:
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inc alien_state+ALIEN_GAIT,X ; cycle through animation
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inc alien_gait,X ; cycle through animation
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lda alien_state+ALIEN_GAIT,X
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lda alien_gait,X
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and #$3
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cmp #$2 ; only run roughly 1/4 of time
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bne alien_no_move_run
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lda alien_state+ALIEN_DIRECTION,X
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lda alien_direction,X
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beq a_run_left
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inc alien_state+ALIEN_X,X ; run right
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inc alien_x,X ; run right
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rts
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a_run_left:
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dec alien_state+ALIEN_X,X ; run left
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dec alien_x,X ; run left
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alien_no_move_run:
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rts
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@ -151,10 +172,10 @@ draw_alien:
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; FIXME
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ldx #0
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lda alien_state+ALIEN_OUT,X
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lda alien_out,X
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beq no_alien
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lda alien_state+ALIEN_STATE,X
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lda alien_state,X
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tay
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lda astate_table_lo,y
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sta ajump
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@ -202,12 +223,12 @@ alien_crouching:
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;================================
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alien_walking:
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lda alien_state+ALIEN_GAIT,X
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lda alien_gait,X
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cmp #64
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bcc alien_gait_fine ; blt
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lda #0
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sta alien_state+ALIEN_GAIT,X
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sta alien_gait,X
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alien_gait_fine:
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lsr
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@ -216,7 +237,7 @@ alien_gait_fine:
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tay
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lda alien_state+ALIEN_GUN,X
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lda alien_gun,X
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beq alien_walk_nogun
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alien_walk_gun:
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@ -243,12 +264,12 @@ alien_walk_nogun:
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;================================
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alien_running:
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lda alien_state+ALIEN_GAIT,X
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lda alien_gait,X
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cmp #32
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bcc alien_run_gait_fine ; blt
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lda #0
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sta alien_state+ALIEN_GAIT,X
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sta alien_gait,X
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alien_run_gait_fine:
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lsr
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@ -270,19 +291,19 @@ alien_run_gait_fine:
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alien_turning:
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dec alien_state+ALIEN_GAIT,X
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dec alien_gait,X
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bpl alien_draw_turning
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lda #0
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sta alien_state+ALIEN_GAIT,X
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sta alien_gait,X
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; switch direction
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lda alien_state+ALIEN_DIRECTION,X
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lda alien_direction,X
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eor #$1
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sta alien_state+ALIEN_DIRECTION,X
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sta alien_direction,X
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lda #A_WALKING
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sta alien_state+ALIEN_STATE,X
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sta alien_state,X
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alien_draw_turning:
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lda #<alien_turning_sprite
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@ -300,7 +321,7 @@ alien_draw_turning:
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;================================
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alien_yelling:
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lda alien_state+ALIEN_GAIT,X
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lda alien_gait,X
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; 00
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; 01
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@ -310,7 +331,7 @@ alien_yelling:
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and #$40
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bne alien_yelling_no_waving
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lda alien_state+ALIEN_GAIT,X
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lda alien_gait,X
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alien_yelling_no_waving:
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and #$10
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@ -335,7 +356,7 @@ alien_yelling_no_waving:
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;================================
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alien_shooting_up:
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lda alien_state+ALIEN_GAIT,X
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lda alien_gait,X
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and #$30
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; 000 000
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@ -358,7 +379,7 @@ alien_shooting_up:
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cpy #0
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lda alien_state+ALIEN_GAIT,X
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lda alien_gait,X
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; and #$ff
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bne finally_draw_alien
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@ -379,13 +400,13 @@ alien_shooting_up:
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finally_draw_alien:
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lda alien_state+ALIEN_X,X
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lda alien_x,X
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sta XPOS
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lda alien_state+ALIEN_Y,X
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lda alien_y,X
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sta YPOS
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lda alien_state+ALIEN_DIRECTION,X
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lda alien_direction,X
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bne alien_facing_right
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alien_facing_left:
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@ -395,5 +416,13 @@ alien_facing_right:
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jmp put_sprite_flipped_crop
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;==================
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; clear aliens
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;==================
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clear_aliens:
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lda #0
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sta alien0_out
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sta alien1_out
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sta alien2_out
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rts
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@ -1,6 +1,10 @@
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; Ootw Checkpoint4 -- Running around the City
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;=======================
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;=======================
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; ootw_city_init
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;=======================
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;=======================
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; call once before entering city for first time
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ootw_city_init:
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lda #0
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@ -8,6 +12,34 @@ ootw_city_init:
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sta BG_SCROLL
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sta DIRECTION ; left
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sta LASER_OUT
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sta ALIEN_OUT
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;===============
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; set up aliens
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jsr clear_aliens
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lda #1
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sta alien0_out
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lda #2
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sta alien0_room
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lda #27
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sta alien0_x
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lda #18
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sta alien0_y
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lda #A_STANDING
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sta alien0_state
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lda #0
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sta alien0_direction
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; set up physicist
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lda #1
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sta HAVE_GUN
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@ -32,15 +64,35 @@ ootw_city_init:
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rts
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;===========================
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;===========================
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; enter new room in jail
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;===========================
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;===========================
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ootw_city:
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;==============================
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; each room init
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;==============================
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; if alien in room, set ALIEN_OUT
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lda #0
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sta ALIEN_OUT
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ldx #0
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alien_room_loop:
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lda alien_out,X
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beq alien_room_continue
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lda alien_room,X
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cmp WHICH_ROOM
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bne alien_room_continue
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inc ALIEN_OUT
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alien_room_continue:
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inx
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cpx #MAX_ALIENS
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bne alien_room_loop
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;==============================
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@ -234,8 +286,9 @@ ootw_room_already_set:
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bit SET_GR
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bit FULLGR
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;===========================
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;============================================
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; Setup pages (is this necessary?)
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; FIXME: use code from c3 which clears better
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lda #0
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sta DRAW_PAGE
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@ -538,6 +591,14 @@ regular_room:
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jsr draw_physicist
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;===============
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; draw alien
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;===============
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lda ALIEN_OUT
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beq no_draw_alien
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jsr draw_alien
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no_draw_alien:
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;================
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; fire laser
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@ -118,6 +118,8 @@ LZ4_DONE = $96
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; More zero-page addresses
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; we try not to conflict with anything DOS, MONITOR or BASIC related
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ALIEN_OUT = $DA ; 2+
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LASER_OUT = $DB ; 2+
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GUN_CHARGE = $DC ; 2+
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