dos33fsprogs/ootw/ootw_pool.s

; Ootw Pool Party

ootw_pool:
	;===========================
	; Enable graphics

	bit	LORES
	bit	SET_GR
	bit	FULLGR

	;=============
	; disable earthquake

	lda	#0
	sta	EARTH_OFFSET

	;===========================
	; Setup pages (is this necessary?)

	lda	#0
	sta	DRAW_PAGE
	lda	#1
	sta	DISP_PAGE

	;===========================
	; Setup right/left exit paramaters

	lda	#(40+128)
	sta	RIGHT_LIMIT
	lda	#(-5+128)
	sta	LEFT_LIMIT

	;=============================
	; Load background to $c00

	lda     #>(pool_rle)
        sta     GBASH
	lda     #<(pool_rle)
        sta     GBASL
	lda	#$c			; load image off-screen $c00
	jsr	load_rle_gr

	;===================================================
	; put beast in background if it hasn't been released

	lda	BEAST_OUT
	bne	beast_in

	lda	#8
	sta	DRAW_PAGE

	lda     #<background_beast
	sta	INL
	lda     #>background_beast
        sta     INH

	lda	#34
	sta	XPOS
	lda	#8
	sta	YPOS

        jsr	put_sprite


beast_in:
	;=================================
	; copy to both pages $400/$800

	jsr	gr_copy_to_current
	jsr	page_flip
	jsr	gr_copy_to_current


	;=================================
	; setup vars

	lda	#0
	sta	GAIT
	sta	GAME_OVER
	sta	TENTACLE_GRAB

	lda	#30
	sta	TENTACLE_PROGRESS

	jsr	setup_beast

	;============================
	;============================
	;============================
	; Pool Loop (palindrome)
	;============================
	;============================
	;============================
pool_loop:

	;================================
	; copy background to current page

	jsr	gr_copy_to_current


	;=======================
	; draw pool ripples

	lda	FRAMEL
	and	#$30		; 0110 1100
	lsr
	lsr
	lsr
	tax

	lda	pool_ripples,X
	sta	INL
	lda	pool_ripples+1,X
	sta	INH

	lda	#9
	sta	XPOS
	lda	#30
	sta	YPOS

	jsr	put_sprite


	lda	FRAMEL
	and	#$30		; 0110 1100
	lsr
	lsr
	lsr
	clc
	adc	#2
	and	#$6
	tax

	lda	pool_ripples,X
	sta	INL
	lda	pool_ripples+1,X
	sta	INH


	lda	#27
	sta	XPOS
	lda	#30
	sta	YPOS

	jsr	put_sprite


	lda	FRAMEL
	and	#$30		; 0110 1100
	lsr
	lsr
	lsr
	clc
	adc	#4
	and	#$6
	tax

	lda     #18
	sta     XPOS
	lda     #28
	sta     YPOS

	jsr	put_sprite



	;==============================
	; handle being grabbed

	lda	TENTACLE_GRAB
	beq	tentacle_action

	;=================================
	; actively being grabbed

	lda	TENTACLE_PROGRESS
	tax

	lda	caught_progression,X
	sta	INL
	lda	caught_progression+1,X
	sta	INH

	lda	TENTACLE_X
	sta	XPOS
	lda	#22
	sta	YPOS

	lda	FRAMEL
	and	#$1f
	bne	no_caught_progress

	inc	TENTACLE_PROGRESS
	inc	TENTACLE_PROGRESS
no_caught_progress:
	jsr	put_sprite

	lda	TENTACLE_PROGRESS
	cmp	#24
	bne	beyond_tentacles

	lda	#$ff
	sta	GAME_OVER

	jmp	beyond_tentacles


	;===============
	; move/draw tentacle monster
tentacle_action:
	lda	FRAMEH
	and	#3
	bne	tentacle_move
	lda	FRAMEL
	cmp	#$ff
	bne	tentacle_move
tentacle_init:
	sec
	lda	PHYSICIST_X
	sbc	#2
	sta	TENTACLE_X

	lda	#0
	sta	TENTACLE_PROGRESS

tentacle_move:

	lda	TENTACLE_PROGRESS
	cmp	#26
	bpl	no_tentacle

	tax

	lda	tentacle_progression,X
	sta	INL
	lda	tentacle_progression+1,X
	sta	INH

	lda	TENTACLE_X
	sta	XPOS
	lda	#22
	sta	YPOS

	lda	FRAMEL
	and	#$3f
	bne	no_tentacle_progress

	inc	TENTACLE_PROGRESS
	inc	TENTACLE_PROGRESS
no_tentacle_progress:
	jsr	put_sprite

	; See if we are fully extended
	; if we are close enough to grab

	lda	TENTACLE_PROGRESS
	cmp	#12
	bne	no_tentacle

	sec
	lda	PHYSICIST_X
	sbc	TENTACLE_X		; want -4 to 4
	clc
	adc	#4			; want 0 to 8
	and	#$f8
	bne	no_tentacle

	lda	#0
	sta	TENTACLE_PROGRESS
	lda	#1
	sta	TENTACLE_GRAB

no_tentacle:

	;===============================
	; check keyboard

	jsr	handle_keypress


	;===============================
	; move physicist

	jsr	move_physicist

	;===============================
	; check limits

	jsr	check_screen_limit

	;===============
	; draw physicist

	jsr	draw_physicist

	;================
	; handle beast

	lda	BEAST_OUT
	beq	pool_no_beast

	;================
	; move beast

	jsr	move_beast

	;================
	; draw beast

	jsr	draw_beast

pool_no_beast:


beyond_tentacles:

	;======================
	; draw foreground plant

	lda	FRAMEL
	and	#$c0		; 0110 1100
	lsr
	lsr
	lsr
	lsr
	lsr
	tax

	lda	plant_wind,X
	sta	INL
	lda	plant_wind+1,X
	sta	INH

        lda     #4
        sta     XPOS
        lda     #30
        sta     YPOS

	jsr	put_sprite

	;===============
	; page flip

	jsr	page_flip

	;================
	; inc frame count

	inc	FRAMEL
	bne	frame_no_oflo
	inc	FRAMEH

frame_no_oflo:

	; pause?

	; check if done this level

	lda	GAME_OVER
	cmp	#$ff
	beq	done_pool

	; check if done this level
	cmp	#$2
	bne	not_to_right

	; exit to right

	lda	#0
	sta	PHYSICIST_X
	sta	WHICH_CAVE

	jmp	ootw_cavern

not_to_right:
	cmp	#$1
	bne	not_done_pool

	lda	#36
	sta	PHYSICIST_X

	jmp	ootw_rope

not_done_pool:

	; loop forever

	jmp	pool_loop

done_pool:
	rts