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dos33fsprogs/games/mist/octagon.s

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; Octagon -- inside the Octagon Temple
; by deater (Vince Weaver) <vince@deater.net>
; Zero Page
.include "zp.inc"
.include "hardware.inc"
.include "common_defines.inc"
.include "common_routines.inc"
octagon_start:
;===================
; init screen
jsr TEXT
jsr HOME
bit KEYRESET
bit SET_GR
bit PAGE0
bit LORES
bit FULLGR
;=================
; set up location
;=================
lda #<locations
sta LOCATIONS_L
lda #>locations
sta LOCATIONS_H
lda #0
sta DRAW_PAGE
sta LEVEL_OVER
sta ANIMATE_FRAME
; reset fireplace rotation
lda #$ff
sta animate_direction
; init cursor
lda #20
sta CURSOR_X
sta CURSOR_Y
; set up game over status
jsr update_game_over
; set up initial location
jsr change_location
lda #1
sta CURSOR_VISIBLE ; visible at first
game_loop:
;=================
; reset things
;=================
lda #0
sta IN_SPECIAL
sta IN_RIGHT
sta IN_LEFT
;====================================
; copy background to current page
;====================================
jsr gr_copy_to_current
;====================================
; handle special-case forground logic
;====================================
; things always happening
lda LOCATION
cmp #OCTAGON_TOWER_ROTATION
beq animate_tower_rotation
cmp #OCTAGON_GRID_BOOK
beq looking_at_grid_book
cmp #OCTAGON_IN_FIREPLACE
beq in_fireplace_red_page
cmp #OCTAGON_GREEN_BOOK_OPEN
beq looking_at_green_book
cmp #OCTAGON_IN_FIREPLACE_CLOSED
beq handle_fireplace_puzzle
cmp #OCTAGON_FIREPLACE_SHELF
bne check_temple_center
jsr draw_fireplace_shelf_pages
jmp done_foreground
check_temple_center:
cmp #OCTAGON_TEMPLE_CENTER
bne check_page_close_red
jsr draw_octagon_page_far
jmp done_foreground
check_page_close_red:
cmp #OCTAGON_RED_BOOKSHELF
bne check_page_close_blue
jsr draw_octagon_page_close_red
jmp done_foreground
check_page_close_blue:
cmp #OCTAGON_BLUE_BOOKSHELF
bne done_foreground
jsr draw_octagon_page_close_blue
done_foreground:
;====================================
; handle animations
;====================================
; things only happening when animating
lda ANIMATE_FRAME
beq nothing_special
lda LOCATION
cmp #OCTAGON_FRAME_SHELF
beq animate_frame_shelf
cmp #OCTAGON_FRAME_DOOR
beq animate_frame_door
cmp #OCTAGON_TEMPLE_CENTER
beq animate_shelf
cmp #OCTAGON_ELEVATOR_IN
beq animate_elevator
cmp #OCTAGON_RED_BOOK_OPEN
beq animate_red_book
cmp #OCTAGON_BLUE_BOOK_OPEN
beq animate_blue_book
cmp #OCTAGON_RED_END
beq animate_end
cmp #OCTAGON_BLUE_END
beq animate_end
bne nothing_special
animate_frame_shelf:
jsr shelf_swirl
jmp nothing_special
animate_frame_door:
jsr door_swirl
jmp nothing_special
animate_shelf:
jsr animate_shelf_open
jmp nothing_special
animate_elevator:
jsr animate_elevator_ride
jmp nothing_special
animate_tower_rotation:
jsr handle_tower_rotation
jmp nothing_special
looking_at_grid_book:
jsr draw_book_grid
jmp nothing_special
looking_at_green_book:
jsr draw_atrus_book
jmp nothing_special
in_fireplace_red_page:
jsr draw_in_fireplace_red_page
jmp nothing_special
handle_fireplace_puzzle:
jsr draw_fireplace_puzzle
jmp nothing_special
animate_red_book:
jsr red_book_animation
jmp nothing_special
animate_blue_book:
jsr blue_book_animation
jmp nothing_special
animate_end:
jsr end_static_animation
jmp nothing_special
nothing_special:
;====================================
; draw pointer
;====================================
jsr draw_pointer
;====================================
; page flip
;====================================
jsr page_flip
;====================================
; handle keypress/joystick
;====================================
jsr handle_keypress
;====================================
; inc frame count
;====================================
inc FRAMEL
bne room_frame_no_oflo
inc FRAMEH
room_frame_no_oflo:
;====================================
; check level over
;====================================
lda LEVEL_OVER
bne really_exit
jmp game_loop
really_exit:
jmp end_level
leave_octagon:
lda #MIST_OUTSIDE_TEMPLE
sta LOCATION
lda #LOAD_MIST
sta WHICH_LOAD
lda #$ff
sta LEVEL_OVER
rts
handle_octagon:
ldx CURSOR_X
lda DIRECTION
and #$f
cmp #DIRECTION_W
beq octagon_w
cmp #DIRECTION_E
beq octagon_e
cmp #DIRECTION_S
beq octagon_s
octagon_n:
cpx #10
bcc goto_shelf_frame
cpx #29
bcs goto_door_frame
bcc goto_bookshelf
octagon_e:
cpx #10
bcc goto_door_frame
cpx #29
bcs goto_fireplace
bcc goto_blue_book
octagon_w:
cpx #10
bcc goto_map
cpx #29
bcs goto_shelf_frame
bcc goto_red_book
octagon_s:
cpx #10
bcc goto_fireplace
cpx #29
bcs goto_map
bcc goto_door
goto_map:
ldy #OCTAGON_MAP
lda #DIRECTION_W
jmp done_goto
goto_red_book:
ldy #OCTAGON_RED_BOOKSHELF
lda #DIRECTION_W|DIRECTION_ONLY_POINT
jmp done_goto
goto_shelf_frame:
ldy #OCTAGON_FRAME_SHELF
lda #DIRECTION_N
jmp done_goto
goto_bookshelf:
ldy #OCTAGON_BOOKSHELF
lda #DIRECTION_N
jmp done_goto
goto_door_frame:
ldy #OCTAGON_FRAME_DOOR
lda #DIRECTION_N
jmp done_goto
goto_blue_book:
ldy #OCTAGON_BLUE_BOOKSHELF
lda #DIRECTION_E|DIRECTION_ONLY_POINT
jmp done_goto
goto_fireplace:
ldy #OCTAGON_FIREPLACE
lda #DIRECTION_E
jmp done_goto
goto_door:
ldy #OCTAGON_TEMPLE_DOORWAY
lda #DIRECTION_S
jmp done_goto
done_goto:
sty LOCATION
sta DIRECTION
jmp change_location
;======================================
; draw pages if in octagon center (far)
draw_octagon_page_far:
lda DIRECTION
and #$f
cmp #DIRECTION_W
beq draw_octagon_red
cmp #DIRECTION_E
beq draw_octagon_blue
no_draw_page_far:
rts
draw_octagon_red:
lda RED_PAGES_TAKEN
and #OCTAGON_PAGE
bne no_draw_page_far
lda #<red_page_small_sprite
sta INL
lda #>red_page_small_sprite
sta INH
jmp draw_small_page
draw_octagon_blue:
lda BLUE_PAGES_TAKEN
and #OCTAGON_PAGE
bne no_draw_page_far
lda #<blue_page_small_sprite
sta INL
lda #>blue_page_small_sprite
sta INH
draw_small_page:
lda #21
sta XPOS
lda #24
sta YPOS
jmp put_sprite_crop ; tail call
;======================================
; draw pages if in octagon center (close)
draw_octagon_page_close_red:
lda DIRECTION
and #$f
cmp #DIRECTION_W
beq draw_octagon_close_red
no_draw_page_close:
rts
draw_octagon_close_red:
lda RED_PAGES_TAKEN
and #OCTAGON_PAGE
bne no_draw_page_close
lda #<red_page_sprite
sta INL
lda #>red_page_sprite
sta INH
jmp draw_page_close
draw_octagon_page_close_blue:
lda DIRECTION
and #$f
cmp #DIRECTION_E
beq draw_octagon_close_blue
rts
draw_octagon_close_blue:
lda BLUE_PAGES_TAKEN
and #OCTAGON_PAGE
bne no_draw_page_close
lda #<blue_page_sprite
sta INL
lda #>blue_page_sprite
sta INH
draw_page_close:
lda #24
sta XPOS
lda #24
sta YPOS
jmp put_sprite_crop ; tail call
;======================================
; draw pages on fireplace shelf
draw_fireplace_shelf_pages:
draw_fireplace_red:
lda RED_PAGES_TAKEN
and #FINAL_PAGE
bne draw_fireplace_blue
lda #<red_page_sprite
sta INL
lda #>red_page_sprite
sta INH
lda #21
sta XPOS
lda #30
sta YPOS
jsr put_sprite_crop ; tail call
draw_fireplace_blue:
lda BLUE_PAGES_TAKEN
and #FINAL_PAGE
bne done_fireplace_page
lda #<blue_page_sprite
sta INL
lda #>blue_page_sprite
sta INH
lda #15
sta XPOS
lda #30
sta YPOS
jsr put_sprite_crop ; tail call
done_fireplace_page:
rts
;==========================
; includes
;==========================
.include "gr_plotpoint.s"
; level graphics
.include "graphics_octagon/octagon_graphics.inc"
; sound
.include "simple_sounds.s"
; puzzles
.include "brother_books.s"
.include "octagon_bookshelf.s"
.include "octagon_rotation.s"
.include "octagon_fireplace.s"
; linking books
.include "handle_pages.s"
; books
.include "books/octagon_books.inc"
; level data
.include "leveldata_octagon.inc"
;.align $100
;audio_red_page:
;.incbin "audio/red_page.btc"
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