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DEVICE ZXSPECTRUM128
include "../../_sdk/sys_h.asm"
EGA=1;0
COLOR_SKY=0b11101101
COLOR_SKYDARK=0b00101101
COLOR_SHADOW=0
COLOR_SQUARE0=0b00001001
COLOR_SQUARE1=0b11110110
;GO=0x6001;0x8001
SCRHGT=176
YMID88=88
SQUAREMUL=1
SQUARESQR=1
showtime=0;1
fastest=1
original_coords=1
;IMVEC=0x7d00;0xae00;0xbe00
;IMER=(IMVEC/256+1)*257
SQRTFIXK=256
FIXK=(SQRTFIXK*SQRTFIXK)
FIXKDIV2=(FIXK/2)
spheres=0x02
cx0=-(30*FIXK/100>>8) ;-30
cy0=-(80*FIXK/100>>8) ;-80
cz0=(300*FIXK/100>>8) ;300
r0=(60*FIXK/100>>8) ;60
if original_coords
cx1=(83*FIXK/100>>8) ;90 ;88
cy1=-(120*FIXK/100>>8) ;-110 ;-114
cz1=(200*FIXK/100>>8)
r1=(20*FIXK/100>>8)
else
cx1=(87*FIXK/100>>8) ;90
cy1=-(100*FIXK/100>>8) ;-110 (100 ╨╛╨┐╤В╨╕╨╝╨╕╨╖╨╕╤А╤Г╨╡╤В╤Б╤П MegaLZ)
cz1=(200*FIXK/100>>8) ;200 (200 ╨╛╨┐╤В╨╕╨╝╨╕╨╖╨╕╤А╤Г╨╡╤В╤Б╤П MegaLZ)
r1=(20*FIXK/100>>8) ;20
endif
q0=(r0*r0>>8)
q1=(r1*r1>>8)
GROUND=0x3e;0x7f ;╨║╨╛╨┤ ╨║╨╛╨╝╨░╨╜╨┤╤Л ld a,N
SKY=0xff
EYEX=(30*FIXK/100)
EYEY=-(50*FIXK/100)
EYEZ=(0*FIXK/100)
KVECTOR=64
;EYEDZ=(300*FIXK/KVECTOR)
EYEDZ=(256*FIXK/KVECTOR)
EYEDZDIVFIXK=(EYEDZ/SQRTFIXK)
SQEYEDZ=(EYEDZDIVFIXK*EYEDZDIVFIXK)
include "math.asm"
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
org PROGSTART
begin
ld sp,0x4000 ;╨╜╨╡ ╨┤╨╛╨╗╨╢╨╡╨╜ ╨╛╨┐╤Г╤Б╨║╨░╤В╤М╤Б╤П ╨╜╨╕╨╢╨╡ 0x3b00! ╨╕╨╜╨░╤З╨╡ ╨▓╨╛╨╖╨╝╨╛╨╢╨╜╨░ ╨┐╨╛╤А╤З╨░ OS
ld hl,1234
OS_HIDEFROMPARENT
if EGA
ld e,0+0x80 ;EGA + keep gfx pages
else
ld e,3+0x80 ;6912 + keep gfx pages
endif
OS_SETGFX ;e=0:EGA, e=2:MC, e=3:6912, e=6:text ;+SET FOCUS ;e=-1: disable gfx (out: e=old gfxmode)
ld e,0
OS_CLS
if EGA == 0
ld a,(user_scr0_high) ;ok
SETPG16K
xor a
;out (0xfe),a
ld de,0x5801
ld h,d
ld l,a
ld bc,767
ld (hl),7
ldir
endif
if SQUAREMUL
;d.e * b.c = 0.5*(d.e+b.c)^2 - 0.5*d.e^2 - 0.5*b.c^2
;╨░╨┤╤А╨╡╤Б ╨▓ ╤В╨░╨▒╨╗╨╕╤Ж╨╡: %1hhhhhhh.lllllll0
;╨╝╨░╨║╤Б╨╕╨╝╤Г╨╝ = 127^2/2 = #1f80
;ex de,hl ;hl=0 after dehrum
ld de,#8000
;ld sp,hl
xor a ;╤Б╤Г╨╝╨╝╨░ ╨╝╨╗
ld h,a
ld l,a
;ld d,a
;ld e,a
;ld b,a
;ld c,a
;ld de,0 ;╤Б╤Г╨╝╨╝╨░
ld bc,0 ;╤Б╤З╤С╤В╤З╨╕╨║
ld lx,a ;╤Б╤З╤С╤В╤З╨╕╨║ ╨╝╨╗
mksquare
ex de,hl
ld (hl),e
inc l
ld (hl),d
inc lx
inc lx
inc lx
inc lx
jr nz,$+3
inc bc
add a,lx
ex de,hl ;╤В╤Г╤В ╨╗╤Г╤З╤И╨╡
adc hl,bc
;ex de,hl
;inc hl
;inc h
;dec h
inc de
inc d
dec d
jr nz,mksquare
endif
if !SQUARESQR
ld bc,1
ld de,tsqr
;ld hl,0 ;╨▓╤Л╨│╨╛╨┤╨╜╨╡╨╡ ╨╜╨░ MegaLZ ╨╕ Hrum (╨┐╨╛╤Б╨╗╨╡ dehrum ╤Г╨╢╨╡ hl=0, de=rnd, bc=#1010)
mksqr0
ex de,hl
ld (hl),e
inc h
ld (hl),d
dec h
ex de,hl
add hl,bc
inc bc
inc bc
inc e
jr nz,mksqr0
;e=0
;hl=0
;bc=0x201
endif
if showtime
ld de,IMVEC;0xbe00 ;╨▓╤Л╨│╨╛╨┤╨╜╨╡╨╡ ╨╜╨░ MegaLZ
ld a,d
ld i,a
inc a
;ld a,IMER/256
ld (de),a
inc e
jr nz,$-2
inc d
ld (de),a
ld e,d
ld hl,on_int.
ld b,1
ldir
im 2
ei
else
;di
raytrace_begin
;ld a,0xaf
endif
if 1==1
ld l,2*(spheres-1)+1
mkbounding0
push hl
dec l
ld h,cz/256
ld c,(hl)
inc l
ld b,(hl)
;de=cz
;ld hl,-EYEZ ;0
;add hl,de
;ld b,h
;ld c,l
;bc=sub(cz[k],EYEZ) >= 0
;pop hl
;push hl
inc h ;ld h,rad/256
ld d,(hl)
dec l
ld e,(hl)
ld a,d
or a
ex af,af' ;'
DIVDEBC_AXSIGN_NONEGBC ;(keep bc)
pop hl
ld h,projr/256
push hl
ld (hl),e
ld h,cx/256
ld d,(hl)
dec l
ld e,(hl)
ld hl,-((EYEX>>8)&0xffff)&0xffff
add hl,de
ex de,hl
ld a,d
or a
ex af,af' ;'
DIVDEBC_AXSIGN_NONEGBC ;(keep bc)
pop hl
inc h
push hl
;ld h,projx/256
ld (hl),e
ld h,cy/256
ld d,(hl)
dec l
ld e,(hl)
ld hl,-((EYEY>>8)&0xffff)&0xffff
add hl,de
ex de,hl
ld a,d
or a
ex af,af' ;'
DIVDEBC_AXSIGN_NONEGBC ;(keep bc)
pop hl
;inc h
;ld h,projy/256
dec l
ld (hl),e
dec l
jp p,mkbounding0
endif
; i = 0x00;
; REPEAT {
; //eyedy = ((FLOAT)(88)-(FLOAT)(i))<<10L;
; //eyedy = mul(((FLOAT)(88)-(FLOAT)(i))*FIXK, MULVECTOR);
; //sqeyedy = sq(eyedy);
; count_eyedy();
; j = 0x00;
; REPEAT {
; tracepixel(i,j);
; INC j;
; }UNTIL (j == 0x00);
; INC i;
; }UNTIL (i == 0xb0);
ld a,SCRHGT-1;0xaf
raytrace_lines0
;//eyedy = ((FLOAT)(88)-(FLOAT)(i))<<10L;
;//eyedy = mul(((FLOAT)(88)-(FLOAT)(i))*FIXK, MULVECTOR);
ld (tracepixel.i),a
sub YMID88
ld (scryHSB),a
ld l,a
SBC A,a
ld h,a
add hl,hl
add hl,hl
LD [eyedyUINT],hl
SQHL
LD hl,+(SQEYEDZ>>8)&0xffff
add hl,de
LD [sqeyedyUINT],HL
if EGA
xor a ;X
raytrace_pixels0
push af ;X
and 2
ld a,(user_scr0_high) ;ok
jr nz,$+5
ld a,(user_scr0_low) ;ok
SETPG16K
pop af
push af
call tracepixel ;A=pixel color
ex af,af' ;'
ld hl,(tracepixel.i) ;Y
ld h,0x40/32
ld b,0
ld c,l
add hl,hl
add hl,hl
add hl,bc ;*5
add hl,hl
add hl,hl
add hl,hl ;Y*40
pop af ;X
ld c,a
ex af,af' ;'
srl c ;X0 TODO
jr c,raytrace_pixel_right
and 0b01000111
jr raytrace_pixel_leftq
raytrace_pixel_right
and 0b10111000
raytrace_pixel_leftq
srl c
srl c
jr nc,$+4
set 5,h
inc c
inc c
inc c
inc c
ld b,0
add hl,bc
or (hl)
ld (hl),a
ex af,af' ;'
inc a
jr nz,raytrace_pixels0
else
ld a,(tracepixel.i) ;Y
ld c,0
;call 8880
ld b,a
and a
rra
scf
rra
and a
rra
xor b
and 0xf8
xor b
ld h,a
ld a,c
rlca
rlca
rlca
xor b
and 0xc7
xor b
rlca
rlca
ld l,a
xor a ;X
raytrace_pixels0
push af
push hl
call tracepixel ;CY=pixel color
pop hl
rl (hl)
pop af
inc a
push af
and 7
jr nz,nonextbyte
inc l
nonextbyte
pop af
jr nz,raytrace_pixels0
endif
tracepixel.i=$+1
ld a,0
dec a;sub 1
jp nz,raytrace_lines0
YIELDGETKEYLOOP
QUIT
if showtime
ld iy,23610
ld hl,10072
exx
im 1
_TIMER=$+1
ld bc,0
sla c
rl b
ld sp,0x5fe8
;ret
on_int.
push hl
;_TIMER=$+1+IMER-on_int.
ld hl,(_TIMER);0
inc hl
ld (_TIMER),hl
pop hl
ei
ret
else
if 1==1
halt
else
;ld hl,cz
;ld a,(hl)
;sub 5
;ld (hl),a
;ld hl,cz+2
;ld a,(hl)
;add a,5
;ld (hl),a
ld hl,cy
inc (hl)
;inc hl
;inc hl
;dec (hl)
jp raytrace_begin
endif
endif
tracepixel
;//x = EYEX;
;//y = EYEY;
;//z = EYEZ;
;//dx = ((FLOAT)(j)-(FLOAT)(128))<<10L; //dx = mul(((FLOAT)(j)-(FLOAT)(128))*FIX
;//dy = eyedy;
;//dz = EYEDZ; //mul((FLOAT)(300)*FIXK, MULVECTOR);
;//dd = sq(dx) + sqeyedy + SQEYEDZ; //sq(dz); //dx*dx+dy*dy+dz*dz;
;a = j
eyedyUINT=$+1
LD hl,0 ;+(EYEDZ>>8)&0xffff ╨╕ ╤В.╨┐. ╨╜╨╡╨▓╤Л╨│╨╛╨┤╨╜╨╛
LD [tracepixel.dyUINT],HL
LD HL,+(EYEDZ>>8)&0xffff
LD [tracepixel.dzUINT],HL
LD hl,+(EYEX>>8)&0xffff
LD [tracepixel.xUINT],hl
LD hl,+(EYEZ>>8)&0xffff ;ld l,h ╨┐╤А╨╛╨╕╨│╤А╤Л╨▓╨░╨╡╤В 2 ╨▒╨░╨╣╤В╨░ ╨▓ MegaLZ, 1 ╨▒╨░╨╣╤В ╨▓ Hrum
LD [tracepixel.zUINT],hl
LD hl,+(EYEY>>8)&0xffff
LD [tracepixel.yUINT],hl
sub l;128
ld (scrxHSB),a
ld l,a
SBC A,a
ld h,a
add hl,hl
add hl,hl
ld (tracepixel.dxUINT),hl
SQHL ;out: de
sqeyedyUINT=$+1
LD hl,+(SQEYEDZ>>8)&0xffff;0
add hl,de
LD [tracepixel.ddUINT],HL
tracepixel.L100
;//IF (positive(y) || negative(dy)) { n = SKY; s = 0x7fffffffL; }ELSE { n = GROUND; s = neg(idiv(y, dy)); };
LD BC,[tracepixel.dyUINT] ;╨╗╤Г╤З╤И╨░╤П ╨┐╨╡╤А╨╡╤Б╤В╨░╨╜╨╛╨▓╨║╨░
ld hl,[tracepixel.yUINT]
ld a,h
cpl
or b
LD [tracepixel.sUINT+1],a
JP M,skyorground_count_s.q
;P
ex de,hl ;de=y
DIVDEBC_ASIGN ;de / bc
LD [tracepixel.sUINT],de
LD A,GROUND
skyorground_count_s.q
LD [tracepixel.n],A
ld l,2*(spheres-1)+1
checkbounding0
ld h,projr/256
ld e,(hl) ;projr
inc h;ld h,projx/256
scrxHSB=$+1
ld a,GROUND;0
sub (hl) ;a = SCRX - projx
dec l
add a,e ;a = SCRX - (projx-projr)
jp m,tracepixel.NOTFOUNDb
srl a
cp e
jp nc,tracepixel.NOTFOUNDb
;inc h;ld h,projy/256
scryHSB=$+1
ld a,GROUND;0
sub (hl) ;a = SCRY - projy
add a,e ;a = SCRY - (projy-projr)
jp m,tracepixel.NOTFOUNDb
srl a
cp e
;jr nc,tracepixel.NOTFOUNDb
jr c,checkspheres
;ld a,(scrxHSB)
;ld hl,scryHSB
;xor (hl)
;rra
;ret c
tracepixel.NOTFOUNDb
dec l
jp p,checkbounding0
jp checkspheresq
checkspheres
;jp tracepixel.NOTFOUND
ld a,2*(spheres-1)
tracepixel.checkspheres0
LD [tracepixel.k],A
;//╨╕╤Й╨╡╨╝ ╤Б╤Д╨╡╤А╤Г, ╨╜╨░ ╨║╨╛╤В╨╛╤А╤Г╤О ╤Б╨╝╨╛╤В╤А╨╕╨╝ (╨╡╤Б╨╗╨╕ ╨╡╤Б╤В╤М)
;//px = cx[k] - x;
;//py = cy[k] - y;
;//pz = cz[k] - z;
;//pp = sq(px) + sq(py) + sq(pz);
;//sc = mul(px,dx) + mul(py,dy) + mul(pz,dz);
ld (count_pxpypzppsc_cxaddr),a
ld (count_pxpypzppsc_cyaddr),a
ld (count_pxpypzppsc_czaddr),a
;╤Ж╨╡╨╜╤В╤А ╨┐╤А╨╛╨╡╨║╤Ж╨╕╨╕ ╤Б╤Д╨╡╤А╤Л: cx[k]/pz, cy[k]/pz
;╤А╨░╨┤╨╕╤Г╤Б ╨┐╤А╨╛╨╡╨║╤Ж╨╕╨╕ ╤Б╤Д╨╡╤А╤Л: r[k]/pz
; IF (!(
; (SCRX >= sub(projx[k],projr[k]))
; &&(SCRX < add(projx[k],projr[k]))
; &&(SCRY >= sub(projy[k],projr[k]))
; &&(SCRY < add(projy[k],projr[k]))
; )) {
; goto L200; //╨╜╨╡ ╤В╨░ ╤Б╤Д╨╡╤А╨░
; };
count_pxpypzppsc_czaddr=$+1
ld hl,(cz)
tracepixel.zUINT=$+1
LD bc,0;x0101
;or a
SBC HL,bc
push hl ;pz=cz[k]-z
SQHL ;out: de
ld hy,d
ld ly,e ;sq(pz)
count_pxpypzppsc_cyaddr=$+1
ld hl,(cy)
tracepixel.yUINT=$+1
LD bc,0;x0101
;or a
SBC HL,bc
push hl ;py=cy[k]-y
SQHL ;out: de
add iy,de ;sq(pz) + sq(py)
count_pxpypzppsc_cxaddr=$+1
ld hl,(cx)
tracepixel.xUINT=$+1
LD bc,0;x0101
SBC HL,bc
push hl ;px=cx[k]-x
SQHL ;out: de
add iy,de
LD [tracepixel.ppUINT],iy ;pp = sq(px) + sq(py) + sq(pz)
pop bc ;px=cx[k]-x
tracepixel.dxUINT=$+1
LD de,0;x1111
MULDEBC_TOIY
pop bc ;py=cy[k]-y
tracepixel.dyUINT=$+1
LD de,0;x1111
MULDEBC
add iy,de
pop bc ;pz=cz[k]-z
tracepixel.dzUINT=$+1
LD de,0;x1111
MULDEBC
add iy,de ;sc = mul(px,dx) + mul(py,dy) + mul(pz,dz)
;//IF (negative(sc)) { goto L200; }; //╨╜╨╡ ╤В╨░ ╤Б╤Д╨╡╤А╨░
;//bb = idiv(sq(sc),dd); //sc*sc/dd;
;//aa = q[k]-pp+bb; //add(sub(q[k],pp),bb); //q[k]-pp+bb;
;//IF (negative(aa)) { goto L200; }; //╨╜╨╡ ╤В╨░ ╤Б╤Д╨╡╤А╨░
;//s = idiv(root(bb)-root(aa), root(dd)); //(sqrt(bb)-sqrt(aa))/sqrt(dd);
;//n = k;
;//goto LFOUND;
;//L200:
ld d,hy
ld e,ly ;de = sc = mul(px,dx) + mul(py,dy) + mul(pz,dz) ;╨╜╨╕╨╢╨╡ ╨╜╨╡╨▓╤Л╨│╨╛╨┤╨╜╨╛ ╨▓ MegaLZ (2 ╨▒╨░╨╣╤В╨░)
LD a,d
or a;rla
JP M,tracepixel.NOTFOUND ;╨▓╤Л╨│╨╛╨┤╨╜╨╡╨╡ ╨▓ MegaLZ
if SQUARESQR
set 7,d
res 0,e
ex de,hl
ld e,(hl)
inc l
ld d,(hl)
;ld a,l
;cp 8 ;╨║╨╛╤Б╤В╤Л╨╗╤М ╨┤╨╗╤П ╨╝╨╗╨░╨┤╤И╨╡╨│╨╛ ╨▒╨╕╤В╨░
rl e;sla e
rl d
else
SQDE
endif
tracepixel.ddUINT=$+1
LD bc,0
DIVDEBC_POSITIVE ;de = bb
ld hl,(q)
tracepixel.k=$-2
checksphereradius_qaddr=$-2
add hl,de ;q[k]+bb ;CY=0, ╤В.╨║. q[k] (>=0) + bb (>=0)
tracepixel.ppUINT=$+1
LD bc,0;x0101
;or a
sbc hl,bc ;q[k]+bb-pp
JP M,tracepixel.NOTFOUND
push de ;bb
ROOTHL
ex (sp),hl ;push sqrt(aa), pop bb
ROOTHL;call root0hl0
pop bc ;sqrt(aa)
;or a
SBC HL,bc ;hl = sqrt(bb)-sqrt(aa)
push hl
LD hl,[tracepixel.ddUINT]
ROOTHL
ld b,h
ld c,l ;bc = sqrt(dd)
pop de ;de = sqrt(bb)-sqrt(aa)
DIVDEBC_POSITIVE ;sqrt(bb)-sqrt(aa) >= 0
LD [tracepixel.sUINT],de ;s = (sqrt(bb)-sqrt(aa))/sqrt(dd)
LD A,(tracepixel.k);0x3e
LD [tracepixel.n],A
;de = s
jr tracepixel.FOUND
tracepixel.NOTFOUND ;╨╜╨╡ ╤В╨░ ╤Б╤Д╨╡╤А╨░
ld a,(tracepixel.k)
sub 2
JP nc,tracepixel.checkspheres0
checkspheresq
LD A,[tracepixel.n]
or a ;SUB 0x80
if EGA
tracepixel.sUINT=$+1
LD de,0
jp M,tracepixel.sky ;//╨╜╨╡╨▒╨╛
else
ret M ;nc ;//╨╜╨╡╨▒╨╛
tracepixel.sUINT=$+1
LD de,0
endif
tracepixel.FOUND
;de = s
;//dx = mul(dx,s); //dx*s;
;//dy = mul(dy,s); //dy*s;
;//dz = mul(dz,s); //dz*s;
;//dd = mul(sq(s),dd); //dd*s*s;
;//x = x + dx; //x+dx;
;//y = y + dy; //y+dy;
;//z = z + dz; //z+dz;
if SQUAREMUL
set 7,d
res 0,e
endif
LD bc,(tracepixel.dxUINT)
MULDEBC_TOHL_DEPOSITIVE
if SQUAREMUL
dec e
endif
LD [tracepixel.dxUINT],hl ;dx = dx*s
LD bc,[tracepixel.xUINT]
add hl,bc
LD [tracepixel.xUINT],hl ;x = x+dx
LD bc,[tracepixel.dyUINT]
MULDEBC_TOHL_DEPOSITIVE
if SQUAREMUL
dec e
endif
LD [tracepixel.dyUINT],hl ;dy = dy*s
LD bc,[tracepixel.yUINT]
add hl,bc
LD [tracepixel.yUINT],hl ;y = y+dy
LD bc,[tracepixel.dzUINT]
MULDEBC_TOHL_DEPOSITIVE
if SQUARESQR&SQUAREMUL
dec e ;╨▓╤Л╨╕╨│╤А╤Л╤И 1 ╨▒╨░╨╣╤В ╨┐╨╛ ╤Б╤А╨░╨▓╨╜╨╡╨╜╨╕╤О ╤Б dec l
endif
LD [tracepixel.dzUINT],hl ;dz = dz*s
LD bc,[tracepixel.zUINT]
add hl,bc
LD [tracepixel.zUINT],hl ;z = z+dz
if SQUARESQR&SQUAREMUL
ex de,hl
ld e,(hl)
inc l
ld d,(hl)
ld a,l
cp 8 ;╨║╨╛╤Б╤В╤Л╨╗╤М ╨┤╨╗╤П ╨╝╨╗╨░╨┤╤И╨╡╨│╨╛ ╨▒╨╕╤В╨░
rl e;sla e
rl d
else
LD HL,[tracepixel.sUINT]
SQHL ;out: de
endif
LD bc,[tracepixel.ddUINT]
MULDEBC_TOHL_POSITIVE
LD [tracepixel.ddUINT],hl ;dd = dd*s*s
tracepixel.n=$+1
LD A,0x3e
cp GROUND
JP z,tracepixel.ground ;//╨╖╨╡╨╝╨╗╤П
;//nx = x - cx[n];
;//ny = y - cy[n];
;//nz = z - cz[n];
;//l = idiv(mul2( mul(dx,nx) + mul(dy,ny) + mul(dz,nz)), /**nn*/sq(nx) + sq(ny)
;//dx = dx - mul(nx,l); //dx-nx*l;
;//dy = dy - mul(ny,l); //dy-ny*l;
;//dz = dz - mul(nz,l); //dz-nz*l;
ld (count_reflection_cxaddr),a
ld (count_reflection_cyaddr),a
ld l,a
LD h,cz/256
ld c,(hl)
inc l
ld b,(hl)
LD HL,[tracepixel.zUINT]
SBC HL,BC
LD [tracepixel.nz],HL ;z-cz[n]
SQHL ;out: de
ld hy,d
ld ly,e
count_reflection_cyaddr=$+2
LD bc,(cy)
LD HL,[tracepixel.yUINT]
SBC HL,BC
LD [tracepixel.ny],HL ;y-cy[n]
SQHL ;out: de
add iy,de
count_reflection_cxaddr=$+2
LD bc,(cx)
LD HL,[tracepixel.xUINT]
SBC HL,BC
LD [tracepixel.nx],HL ;x-cx[n]
SQHL ;out: de
add iy,de
push iy ;╨┤╨╡╨╗╨╕╤В╨╡╨╗╤М = sq(nx)+sq(ny)+sq(nz)
tracepixel.nx=$+1
LD bc,0;x0101
LD de,[tracepixel.dxUINT]
MULDEBC_TOIY
tracepixel.ny=$+1
LD bc,0;x0101
LD de,[tracepixel.dyUINT]
MULDEBC
add iy,de
tracepixel.nz=$+1
LD bc,0;x0101
LD de,[tracepixel.dzUINT]
MULDEBC
add iy,de
ld d,hy
ld e,ly
rl e
rl d ;for sign ;de = ╨┤╨╡╨╗╨╕╨╝╨╛╨╡ = 2*(dx*nx+dy*ny+dz*nz)
pop bc ;bc = ╨┤╨╡╨╗╨╕╤В╨╡╨╗╤М = sq(nx)+sq(ny)+sq(nz)
;ld a,d
;xor b
ex af,af' ;'
DIVDEBC_AXSIGN_NONEGBC ;de / bc
push de ;tracepixel.l = 2*(dx*nx+dy*ny+dz*nz)/(sq(nx)+sq(ny)+sq(nz)) ;╤Б╨╛ ╨╖╨╜╨░╨║╨╛╨╝
LD bc,[tracepixel.nx] ;╤Б╨╛ ╨╖╨╜╨░╨║╨╛╨╝
MULDEBC
ld hl,(tracepixel.dxUINT)
;or a
sbc hl,de;bc
ld (tracepixel.dxUINT),hl ;dx-nx*l
pop de
push de ;tracepixel.l
LD bc,[tracepixel.ny] ;╤Б╨╛ ╨╖╨╜╨░╨║╨╛╨╝
MULDEBC
ld hl,(tracepixel.dyUINT)
;or a
sbc hl,de;bc
ld (tracepixel.dyUINT),hl ;dy-ny*l
pop de ;tracepixel.l
LD bc,[tracepixel.nz] ;╤Б╨╛ ╨╖╨╜╨░╨║╨╛╨╝
MULDEBC
ld hl,(tracepixel.dzUINT)
;or a
sbc hl,de;bc
ld (tracepixel.dzUINT),hl ;dz-nz*l
JP tracepixel.L100 ;//╨╛╤В╤А╨░╨╢╨╡╨╜╨╕╨╡
if EGA
tracepixel.sky
if SQUAREMUL
set 7,d
res 0,e
endif
LD bc,[tracepixel.dyUINT] ;<0
;MULDEBC_TOHL_DEPOSITIVE
;if SQUAREMUL
;dec e
;endif
;LD [tracepixel.dyUINT],hl ;dy = dy*s
srl b
rr c
srl b
rr c
;c=╤П╤А╨║╨╛╤Б╤В╤М
ld a,(scrxHSB)
and 3
ld b,a
ld a,(tracepixel.i)
and 3
add a,a
add a,a
add a,b
ld hl,tchunk
add a,l
ld l,a
jr nc,$+3
inc h
ld a,(hl)
cp c
ld a,COLOR_SKY
ret c
ld a,COLOR_SKYDARK
ret
tchunk
db 0x08, 0x88, 0x28, 0xa8
db 0xc8, 0x48, 0xe8, 0x68
db 0x38, 0xb8, 0x18, 0x98
db 0xf8, 0x58, 0xd8, 0x58
endif
tracepixel.ground
;//╨╖╨╡╨╝╨╗╤П
;//k = 0x00;
;//REPEAT {
;// IF (less((sq(/**u*/cx[k]-x) + sq(/**v*/cz[k]-z)), q[k])) {goto RETURNME;};
;// INC k;
;//}UNTIL (k == spheres);
;//IF (fract(x) != fract(z)) {
;// invpix(j,i)
;//}; //((x+100)-(int)(x+100)) //(z-(int)(z))
ld a,2*(spheres-1)
drawground_findshadow0
LD [tracepixel.k],A
ld (drawground_findshadow_qaddr),a
ld (drawground_findshadow_cxaddr),a
LD l,A
LD h,cz/256
LD E,[HL]
INC L
LD D,[HL]
LD hl,[tracepixel.zUINT]
sbc hl,de
SQHL ;out: de
ld hy,d
ld ly,e
drawground_findshadow_cxaddr=$+2
ld de,(cx)
LD HL,[tracepixel.xUINT]
sbc hl,de
SQHL ;out: de
add iy,de
ld d,hy
ld e,ly
drawground_findshadow_qaddr=$+1
ld hl,(q)
sbc hl,de
if EGA
ld a,COLOR_SHADOW
endif
ret nc ;shadow
LD a,[tracepixel.k]
sub 2
JP nc,drawground_findshadow0
ld a,(tracepixel.xUINT) ;╨┤╤А╨╛╨▒╨╜╨░╤П ╤З╨░╤Б╤В╤М
ld hl,tracepixel.zUINT
xor (hl)
rla
if EGA
ld a,COLOR_SQUARE0
ret nc
ld a,COLOR_SQUARE1
endif
ret
if !fastest
muldebc
;+de0 * +bc0 -> .de.
ld a,d
xor b
ex af,af' ;M=╤А╨░╨╖╨╜╤Л╨╡ ╨╖╨╜╨░╨║╨╕ '
ld a,d
rla
jr nc,mul_noneghld0
xor a
sub e
ld e,a
sbc a,d
sub e
ld d,a
mul_noneghld0
ld a,b
rla
jr nc,mul_nonegbcx0
xor a
sub c
ld c,a
sbc a,b
sub c
ld b,a
mul_nonegbcx0
if SQUAREMUL
set 7,d
res 0,e
endif
MULDEBC_POSITIVE
ex af,af' ;M=╤А╨░╨╖╨╜╤Л╨╡ ╨╖╨╜╨░╨║╨╕ '
ret p
xor a
sub e
ld e,a
sbc a,d
sub e
ld d,a
ret
endif
if !SQUARESQR
;ds (-$)&255
tsqr=0x7b00;0x7a00 ;╨║╨╛╨┤ ╨║╨╛╨╝╨░╨╜╨┤╤Л ld a,d (╨╜╨╡ ╨┐╨╛╨╝╨╛╨│╨░╨╡╤В)
;ds 512 ;incbin "tsqr"
endif
align 256
q ;╤В╨░╨║╨╛╨╣ ╨┐╨╛╤А╤П╨┤╨╛╨║ ╨▓╤Л╨│╨╛╨┤╨╜╨╡╨╡ ╨▓ MegaLZ
DW q1
DW q0
align 256
cx
DW cx1
DW cx0
align 256
cy
DW cy1
DW cy0
align 256
cz
DW cz1
DW cz0
align 256 ;╤Б╤А╨░╨╖╤Г ╨┐╨╛╤Б╨╗╨╡ cz
rad
DW r1*17/16 ; //╨▒╨╛╨╗╤М╤И╨╡, ╨┐╨╛╤В╨╛╨╝╤Г ╤З╤В╨╛ ╨▒╨╛╨║ ╤Б╤Д╨╡╤А╤Л ╤В╨╛╤А╤З╨╕╤В ╨╖╨░ ╨┐╤А╨╛╨╡╨║╤Ж╨╕╤О
DW r0*17/16
end
align 256
projr
dw 0 ;╨╕╤Б╨┐╨╛╨╗╤М╨╖╤Г╨╡╤В╤Б╤П ╤В╨╛╨╗╤М╨║╨╛ ╤Б╤В╨░╤А╤И╨╕╨╣ ╨▒╨░╨╣╤В
dw 0
align 256 ;projx ╨╕ projy ╤Б╤А╨░╨╖╤Г ╨┐╨╛╤Б╨╗╨╡ rad
projx
dw 0 ;╨╕╤Б╨┐╨╛╨╗╤М╨╖╤Г╨╡╤В╤Б╤П ╤В╨╛╨╗╤М╨║╨╛ ╤Б╤В╨░╤А╤И╨╕╨╣ ╨▒╨░╨╣╤В
dw 0
; align 256
;projy
; dw 0 ;╨╕╤Б╨┐╨╛╨╗╤М╨╖╤Г╨╡╤В╤Б╤П ╤В╨╛╨╗╤М╨║╨╛ ╨╝╨╗╨░╨┤╤И╨╕╨╣ ╨▒╨░╨╣╤В
; dw 0
;end
display "End=",end
display "Free after end=",/d,#c000-end
display "Size ",/d,end-begin," bytes"
savebin "raytrace.com",begin,end-begin
LABELSLIST "../../../us/user.l"