2020-09-16 04:28:08 +00:00
|
|
|
;===================================
|
|
|
|
|
; where do we point?
|
|
|
|
|
;===================================
|
|
|
|
|
; check to see if cursor is in any of zones
|
|
|
|
|
where_do_we_point:
|
|
|
|
|
ldy #LOCATION_NUM_AREAS
|
|
|
|
|
lda (LOCATION_STRUCT_L),Y
|
|
|
|
|
|
|
|
|
|
tax ; num areas in X
|
|
|
|
|
|
|
|
|
|
ldy #LOCATION_AREAS
|
|
|
|
|
where_loop:
|
|
|
|
|
|
|
|
|
|
lda CURSOR_X
|
|
|
|
|
clc
|
|
|
|
|
adc #3 ; center of cursor is 3 over
|
|
|
|
|
|
|
|
|
|
cmp (LOCATION_STRUCT_L),Y
|
|
|
|
|
bcc where_notxlow ; too far left
|
|
|
|
|
iny
|
|
|
|
|
|
|
|
|
|
cmp (LOCATION_STRUCT_L),Y
|
|
|
|
|
bcs where_notxhigh ; too far right
|
|
|
|
|
iny
|
|
|
|
|
|
|
|
|
|
lda CURSOR_Y
|
|
|
|
|
clc
|
|
|
|
|
adc #4 ; center of cursor 4 down?
|
|
|
|
|
cmp (LOCATION_STRUCT_L),Y
|
|
|
|
|
bcc where_notylow ; too far up
|
|
|
|
|
iny
|
|
|
|
|
|
|
|
|
|
; cmp CURSOR_Y
|
|
|
|
|
cmp (LOCATION_STRUCT_L),Y
|
|
|
|
|
bcs where_notyhigh ; too far right
|
|
|
|
|
iny
|
|
|
|
|
|
|
|
|
|
; we got this far, was a match
|
|
|
|
|
lda (LOCATION_STRUCT_L),Y
|
|
|
|
|
sta NOUN_L
|
|
|
|
|
iny
|
|
|
|
|
lda (LOCATION_STRUCT_L),Y
|
|
|
|
|
sta NOUN_H
|
|
|
|
|
iny
|
|
|
|
|
lda (LOCATION_STRUCT_L),Y
|
|
|
|
|
sta NOUN_VECTOR_L
|
|
|
|
|
iny
|
|
|
|
|
lda (LOCATION_STRUCT_L),Y
|
|
|
|
|
sta NOUN_VECTOR_H
|
|
|
|
|
|
|
|
|
|
lda #0
|
|
|
|
|
sta VALID_NOUN
|
|
|
|
|
rts
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
; update area pointer
|
|
|
|
|
where_notxlow:
|
|
|
|
|
iny
|
|
|
|
|
where_notxhigh:
|
|
|
|
|
iny
|
|
|
|
|
where_notylow:
|
|
|
|
|
iny
|
|
|
|
|
where_notyhigh:
|
|
|
|
|
iny
|
|
|
|
|
iny
|
|
|
|
|
iny
|
|
|
|
|
iny
|
|
|
|
|
iny
|
|
|
|
|
|
|
|
|
|
dex
|
|
|
|
|
bpl where_loop
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
point_nowhere:
|
|
|
|
|
lda #$ff
|
|
|
|
|
sta VALID_NOUN
|
|
|
|
|
rts
|
|
|
|
|
|
|
|
|
|
|
2020-09-13 04:32:52 +00:00
|
|
|
lookout_action:
|
|
|
|
|
rts
|
|
|
|
|
|
|
|
|
|
path_action:
|
|
|
|
|
rts
|
|
|
|
|
|
|
|
|
|
stairs_action:
|
|
|
|
|
rts
|
