283 lines
4.5 KiB
ArmAsm
283 lines
4.5 KiB
ArmAsm
;====================================
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; draw pointer
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;====================================
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draw_pointer:
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lda UPDATE_POINTER
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bne really_draw_pointer
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rts
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really_draw_pointer:
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lda #0
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sta IN_SPECIAL
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sta IN_LEFT
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sta IN_RIGHT
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jsr save_bg_14x14 ; save old bg
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; for now assume the only 14x14 sprites are the pointers
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lda CURSOR_X
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sta XPOS
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lda CURSOR_Y
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sta YPOS
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; see if inside special region
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ldy #LOCATION_SPECIAL_EXIT
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lda (LOCATION_STRUCT_L),Y
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cmp #$ff
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beq finger_not_special ; if $ff not special
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; lda (LOCATION_STRUCT_L),Y
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; cmp #DIRECTION_ANY
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; beq was_any
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lda DIRECTION
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and #$f
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and (LOCATION_STRUCT_L),Y
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beq finger_not_special ; only special if facing right way
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;was_any:
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; see if X1 < X < X2
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lda CURSOR_X
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ldy #LOCATION_SPECIAL_X1
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cmp (LOCATION_STRUCT_L),Y
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bcc finger_not_special ; blt
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ldy #LOCATION_SPECIAL_X2
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cmp (LOCATION_STRUCT_L),Y
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bcs finger_not_special ; bge
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; see if Y1 < Y < Y2
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lda CURSOR_Y
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ldy #LOCATION_SPECIAL_Y1
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cmp (LOCATION_STRUCT_L),Y
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bcc finger_not_special ; blt
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ldy #LOCATION_SPECIAL_Y2
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cmp (LOCATION_STRUCT_L),Y
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bcs finger_not_special ; bge
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; we made it this far, we are special
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finger_grab:
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lda #1
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sta IN_SPECIAL
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lda CURSOR_VISIBLE ; if not visible skip
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bne really_draw_grab
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rts
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really_draw_grab:
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lda DIRECTION
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and #DIRECTION_ONLY_POINT
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bne special_but_point
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lda #<finger_grab_sprite
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sta INL
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lda #>finger_grab_sprite
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jmp finger_draw
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special_but_point:
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jmp finger_point
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finger_not_special:
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lda CURSOR_VISIBLE ; if not visible skip
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bne really_not_special
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rts
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really_not_special:
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; check for left/right
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lda CURSOR_X
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cmp #7
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bcc check_cursor_left ; blt
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cmp #$f0 ; check if off left side of screen
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bcs check_cursor_left ; bge
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cmp #33
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bcs check_cursor_right ; bge
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; otherwise, finger_point
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finger_point:
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; holding item takes precednce
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lda HOLDING_ITEM
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cmp #HOLDING_MATCH
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beq match_finger
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cmp #HOLDING_LIT_MATCH
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beq match_lit_finger
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cmp #HOLDING_KEY
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beq key_finger
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lda HOLDING_PAGE
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and #$c0
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beq real_finger_point
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cmp #HOLDING_BLUE_PAGE
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beq blue_finger
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cmp #HOLDING_WHITE_PAGE
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beq white_finger
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cmp #HOLDING_RED_PAGE
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; beq red_finger
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red_finger:
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lda #<finger_red_page_sprite
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sta INL
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lda #>finger_red_page_sprite
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jmp finger_draw
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; all that's left is key
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key_finger:
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lda #<finger_key_sprite
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sta INL
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lda #>finger_key_sprite
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jmp finger_draw
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match_finger:
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lda #<finger_match_sprite
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sta INL
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lda #>finger_match_sprite
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jmp finger_draw
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match_lit_finger:
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lda #<finger_match_lit_sprite
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sta INL
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lda #>finger_match_lit_sprite
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jmp finger_draw
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blue_finger:
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lda #<finger_blue_page_sprite
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sta INL
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lda #>finger_blue_page_sprite
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jmp finger_draw
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white_finger:
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lda #<finger_white_page_sprite
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sta INL
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lda #>finger_white_page_sprite
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jmp finger_draw
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real_finger_point:
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lda #<finger_point_sprite
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sta INL
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lda #>finger_point_sprite
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jmp finger_draw
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check_cursor_left:
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jsr lookup_direction
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and #$f
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beq finger_point
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cmp #$1
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beq finger_left
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bne finger_uturn_left
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check_cursor_right:
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jsr lookup_direction
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and #$f0
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beq finger_point
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cmp #$10
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beq finger_right
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bne finger_uturn_right
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lookup_direction:
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lda DIRECTION
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and #$f
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tay
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lda log2_table,Y
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asl
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asl
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asl
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asl
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clc
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ldy #LOCATION_BGS
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adc (LOCATION_STRUCT_L),Y
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tay
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lda direction_lookup,Y
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rts
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finger_left:
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lda #1
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sta IN_LEFT
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lda #<finger_left_sprite
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sta INL
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lda #>finger_left_sprite
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jmp finger_draw
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finger_right:
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lda #1
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sta IN_RIGHT
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lda #<finger_right_sprite
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sta INL
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lda #>finger_right_sprite
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jmp finger_draw
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finger_uturn_left:
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lda #2
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sta IN_LEFT
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lda #<finger_turn_left_sprite
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sta INL
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lda #>finger_turn_left_sprite
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jmp finger_draw
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finger_uturn_right:
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lda #2
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sta IN_RIGHT
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lda #<finger_turn_right_sprite
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sta INL
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lda #>finger_turn_right_sprite
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jmp finger_draw
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finger_draw:
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sta INH
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jsr hgr_draw_sprite_14x14
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no_draw_pointer:
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lda #0
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sta UPDATE_POINTER
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rts
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; 0 = point
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; 1 = left
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; 2 = left u-turn
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; R/L EWSN 0010
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; 1010
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direction_lookup:
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direction_lookup_n:
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.byte $00,$00,$22,$22,$01,$01,$21,$21,$10,$10,$12,$12,$11,$11,$11,$11
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direction_lookup_s:
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; N S SN W WN WS WSN
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.byte $00, $22,$00,$22,$10,$12,$10,$12
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; E EN ES ESN EW EWN EWS EWSN
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.byte $01,$02,$01,$21,$11,$11,$11,$11
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direction_lookup_e:
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.byte $00,$01,$10,$11,$22,$21,$12,$11,$00,$01,$10,$11,$22,$21,$12,$11
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direction_lookup_w:
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.byte $00,$10,$01,$11,$00,$10,$01,$11,$22,$12,$21,$11,$22,$12,$21,$11
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