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sptires: stuck trying to erase fire

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This commit is contained in:
Vince Weaver 2019-06-13 01:04:26 -04:00
parent be2645069d
commit c11eb1329c
1 changed files with 58 additions and 6 deletions
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64
interlace_demo/sprites.s
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@ -5,7 +5,7 @@
; + implement shooting with space bar ; + implement shooting with space bar
; + implement both blasts ; + implement both blasts
; + add meteor+explosion sprites ; + add meteor+explosion sprites
; + collision, just use SCRN rather than collision detection?
; Uses the 40x48d page1/page2 every-1-scanline pageflip mode ; Uses the 40x48d page1/page2 every-1-scanline pageflip mode
@ -223,6 +223,7 @@ display_loop:
; 4550 -- VBLANK ; 4550 -- VBLANK
;-1821 -- draw ship (130*14)+1 ;-1821 -- draw ship (130*14)+1
; -829 -- erase ship (100*8)+(14*2)+1 ; -829 -- erase ship (100*8)+(14*2)+1
; -278 -- erase fire
; -31 -- move ship ; -31 -- move ship
; -17 -- move fire ; -17 -- move fire
; -306 -- draw fire (61*5)+1 ; -306 -- draw fire (61*5)+1
@ -230,7 +231,7 @@ display_loop:
; -28 -- handle fire press ; -28 -- handle fire press
; -8 -- loop ; -8 -- loop
;======= ;=======
; 1449 ; 1171
;================ ;================
; erase old ship ; erase old ship
@ -275,6 +276,16 @@ display_loop:
; erase the fire ; erase the fire
;========================== ;==========================
ldy FIRE_Y ; 3
jsr erase_fire ; 6+49
jsr erase_fire ; 6+49
jsr erase_fire ; 6+49
jsr erase_fire ; 6+49
jsr erase_fire ; 6+49
;====
; 278
;========================== ;==========================
; move the fire ; move the fire
@ -449,6 +460,7 @@ done_move:
;========================== ;==========================
; draw the fire ; draw the fire
;==========================
ldy FIRE_Y ; 3 ldy FIRE_Y ; 3
@ -509,10 +521,11 @@ pad_time:
wait_loop: wait_loop:
; Try X=35 Y=8 cycles=1449 ; Try X=4 Y=45 cycles=1171
ldy #8 ; 2
loop1: ldx #35 ; 2 ldy #45 ; 2
loop1: ldx #4 ; 2
loop2: dex ; 2 loop2: dex ; 2
bne loop2 ; 2nt/3 bne loop2 ; 2nt/3
dey ; 2 dey ; 2
@ -537,7 +550,7 @@ wait_loop_end:
clc ; 2 clc ; 2
lda YPOS ; 3 lda YPOS ; 3
adc #$4 ; 2 adc #10 ; 2
sta FIRE_Y ; 3 sta FIRE_Y ; 3
lda #7 ; 2 lda #7 ; 2
@ -832,6 +845,45 @@ fire_line:
;======= ;=======
; 9 ; 9
;========================
; Erase a line of a fire
;========================
; Y = y value
; 17+31+11 = 49
erase_fire:
sty TEMPY ; 3
lda y_lookup_l,Y ; 4
sta OUTL ; 3
lda y_lookup_h,Y ; 4
sta OUTH ; 3
;=======
; 17
; ldx in smc should already be
; set to value from last draw?
; COL0
ldy #6 ; 2
lda (OUTL),Y ; 5+
sta fz_smc+1 ; 5
iny ; 2
lda (OUTL),Y ; 5+
sta fz_smc+2 ; 5
lda #0 ; 2
fz_smc:
sta $c00,Y ; 5
;=======
; 31
ldy TEMPY ; 3
iny ; 2
rts ; 6
;=======
; 11
.include "gr_simple_clear.s" .include "gr_simple_clear.s"