nrstars2 = 7
starx2 = starx1+(nrstars1*2) ;+69
; ;--------MULTIPLES
-mx = starx2+(nrstars2*2) ;+83 ;position of multiple#1
-my = mx+1 ;+84 ;multiple y-pos
-m2x = my+1 ;+85
-m2y = m2x+1 ;+86
-your_locpos = m2y+1 ;+87 ;position in your_prevpos tabl
-your_prevpos = your_locpos+1 ;+88 ;save previous positions (32d)
+your_prevpos = starx2+(nrstars2*2) ;+87 ;save previous positions (32d)
+mm = 4
;^-----------------------------------<1 ;-120=$78
in a,(1) ;come back in
ld b,a ;psh a (keys)
- xor %11111111 ;inverted a = 0 if arrow-key has been pressed
- ld a,(your_multiples)
- jr z,no_adv ;if so, leave the multiples where they are
- or %100 ;set move bit
- jr adv_ok
-no_adv: and %11111011 ;reset move bit
-
+ xor -1 ;inverted a: 0 if arrow-key has been pressed
+ ld a,(your_multiples) ;(btw: CPL doesn't set any flags)
+ res 7,a ;reset move bit (no flags changed)
+ jr z,adv_ok ;if so, leave the multiples where they are
+ set 7,a ;set move bit
adv_ok: ld (your_multiples),a
ld a,(timer) ;framecounter
handle_multiples:
ld a,(your_multiples) ;do you have multiples
ld b,a ;save a for 2nd check
- and %11 ;no? (last two bits = nr of multiples)
+ and %111 ;no? (last two bits = nr of multiples)
ret z ;then don't handle them either
-
- ld a,b ;restore a (your_multiples)
- and %100 ;move the multiples??? (=move bit set?)
+ bit 7,b ;move the multiples??? (=move bit set?)
jr z,mult_adv ;nope, just let them (saves (y)in y, (x)in x)
- ld hl,your_locpos ;location to save this position
- ld a,(hl) ;load a
- inc a ;a=a+1 (next position)
- and %00001111 ;if a>15 then a=a-16
- ld (hl),a ;save new a
- add a,a ;a=a*2
- ld c,a ;bc=2a
- ld b,0
-
- ld hl,your_prevpos ;previous positions
- add hl,bc ;16 turns ago
- ld b,(hl) ;old x-pos
- inc hl ;and
- ld c,(hl) ;old y-pos
- ld (mx),bc ;save multiple position in (mx)
- ld (hl),d ;save current pos. for 16 turns into the future
- dec hl ;yes...
- ld (hl),e ;...both
+ psh de ;current position = needed later
+ ld hl,mm*14+1+your_prevpos ;previous positions
+ ld de,mm*14+3+your_prevpos ;move all positions one back
+ ld bc,mm*14+2
+ lddr ;change 0-57 -> 2-59 (if mm=4 that is)
+ inc hl ;your_prevpos+0
+ pop de
+ ld (hl),d ;x-pos
+ inc hl ;=current position
+ ld (hl),e ;y-pos
mult_adv:
- ld de,(mx)
- ld a,d
- ld d,e
- ld e,a ;ex d,e
- ld ix,spr_multiple ;sprite of the multiple
- jp putsprite ;display it + <ret>
+ ld hl,your_prevpos+16 ;first pos.
+disp_multiples:
+ psh af
+ psh hl
+ ld d,(hl) ;load coords
+ inc hl
+ ld e,(hl)
+ ld ix,spr_multiple ;sprite
+ cal putsprite ;display
+ pop hl
+ ld de,14
+ add hl,de ;next multiple
+ pop af ;counter
+ dec a
+ ret z ;return if all done
+ jr disp_multiples ;loop
;----explode----
;------------------------- place multiples ----------------------------------
Place_multiples:
- ld (mx),de ;set last multiple-position
ld hl,your_prevpos ;place all previous positions
- ld b,16 ;all 16 of them
+ ld b,mm*7+2 ;all saved positions of them (14 per multiple)
place_multiples:
- ld (hl),d ;set prev-x to d
+ ld (hl),e ;set prev-x to d
inc hl ;next
- ld (hl),e ;set prev-y to e
+ ld (hl),d ;set prev-y to e
inc hl ;next
dnz place_multiples ;repeat
ret
dec a ;is it 5?
jr nz,select6 ;no, carry on once more
ld (hl),a ;reset pickups
- inc a
- ld (your_multiples),a
+ ld hl,your_multiples
+ ld a,(hl) ;multiples you already got
+ inc a ;one more
+ cp mm+1
+ jr nc,enoughmultiples ;maxed out
+ ld (hl),a
+enoughmultiples:
ld de,(x)
- cal Place_multiples
+ dec a ;if this is your first multiple then...
+ cal z,Place_multiples ;reset multiples positions
jp disp_icons ;display, return
select6:
ld (hl),0 ;reset pickups
;------------------------- fire bullet --------------------------------------
+fire_multiples:
+ ld hl,(your_prevpos+16);then, fire from multiple position
+ psh af
+ dec h ;one up (-2 height: keeps weapons centered)
+ cal fireany ;fire from multiple position
+ pop af ;number of multiples
+ dec a ;one just displayed
+ ret z ;return if none left
+ ld hl,(your_prevpos+30)
+ psh af
+ dec h
+ cal fireany
+ pop af
+ dec a
+ ret z
+ ld hl,(your_prevpos+44)
+ psh af
+ dec h
+ cal fireany
+ pop af
+ dec a
+ ret z
+ ld hl,(your_prevpos+58)
+ psh af
+ dec h
+ cal fireany
+ pop af
+ dec a
+ ret
+
Fire_bullet:
ld hl,just_fired
ld a,(hl) ;just_fired
ld (hl),5 ;.....then can't fire next turn (go to 5 imm.)
fireOK:
- ld hl,(x) ;yes: first fire from ship position (x)
ld a,(your_multiples) ;any multiples?
- and %11 ;nope?
- jr z,fireany ;then just fire somethin'
- cal fireany ;and blast
- ld hl,(mx) ;then, fire from multiple position (mx)
- dec h ;one up (-2 height: keeps weapons centered)
- ;blast again and <ret>
+ and %111 ;nr. of multiples
+ cal nz,fire_multiples ;if >0 then fire them too
+ ld hl,(x) ;fire from ship position (x)
fireany: ;HL=(x,y)
ld (firex),hl ;set position to fire from
ld a,(your_weapon)
ld ix,spr_icon00 ;emptyIcon
ld a,(your_multiples)
- and %11
+ and %111
jr z,no_multiples
ld ix,spr_icon05
no_multiples:
txt_email: .db "www.shiar.org ",127 ;title screen
.db " shiar0@hotmail.com",0
_txt_email = $3A01 ;$3A1E=just email
-txt_about: .db "v0.98.77 ",127," by Shiar",0 ;right behind txt_email
+txt_about: .db "v0.98.79 ",127," by Shiar",0 ;right behind txt_email
_txt_about = $3321
txt_menu1: .db "NEW GAME",0
txt_menu2: .db "CONTINUE",0
pickuptimer .db 4 ;counts when to place a pickup 4
your_ship .dw spr_ship01 ;your sprite sprs1
your_score .dw 0 ;current score 0
-your_pickup .db 0 ;pickups already picked up 0
+your_pickup .db 3 ;pickups already picked up 0
your_occ .db 0 ;0=normal 1..16=exploding 0
your_inv .db 0 ;invincibility left 0
your_armor .db 12 ;HP left 12
; # after pause weapon will not be fired
; # teacher key fixed (waits for GRAPH to be release before&after)
;
-; + added - removed * changed # bug fixed
\ No newline at end of file
+; 0.99.79 -- 9.VII.00 -- size 6747
+;
+; + you can have upto FOUR multiples! (~20 pixels apart)
+;
+; + added - removed * changed # bug fixed
+
+;bullet handling: (255/enemy)+419+putsprite cycles per bullet
git.shiar.nl / nemesis.git / commitdiff