Centurio by Red Sector Inc. [web]
;******************************************************************************* ; /\______ /\______ /\________ ; __\\\___ \_ __\\\___ \_ __\\\______ \ ; | / / | / / | _____/ \_ ; | / /____| / /____| \ | ; | \____ : _____/ : \ | ; | / \ \ | ; | / . \ . \ | ; __ _|_ / \ \ _|_ __ ; \ \\_\ \\__\ _/ : \_ : \_ /__// /_// / ; |____/_ _ :______ _ :______ _ | ; \\\____________| \\\____________| \\\____________| ; ; _______ _______ _______ _______ _______ _______ ; _\\\__ \___\\\__ \___\\\__ \___\\\_____ \___\\\_____ \___\\\__ \_ ;| /______/| / /| / /| / | / | / / ;\ | / /_| / /_| / | / | / /_ ;|\_______ : _____/ : \_____/ : / : / : \____ | ;| / . \ . \ . / . / . / | ;| / \ \ / / | ;|___ :___ :___ :___\ :___ :___/ sns | ; \\_________: \\_________: \\_________: \\_________: \\_________: \\_________| ; ; R E D S E C T O R I N C ; ; Centurio 256b xpdos tiny intro Baudsurfer/rsi 2015 aka olivier.poudade.free.fr ; Presented first at Chaos Constructions 2015 demoparty in St. Petersburg Russia ; Greets Blabla Conscience Bon^2 BReWErS CODEX Flush Lineout Mandarine Onslaught ; Paranoimia Quartex Rebels Razor1911 RiOT Titan and to all assembly programmers ; Youtube video courtesy of Astrofra https://www.youtube.com/watch?v=F6vvDUkPihs ;******************************************************************************* b equ byte ; type shortner helper w equ word ; type shortner helper d equ dword ; type shortner helper org 100h ; ip=seg:256 mov al,13h ; mode 320x200w256 int 10h ; bios video api mov cl,30 ; sigma of bit-glyphs a:mov eax,171445ddh ; logo 10111000101000100010111011101b shr eax,cl ; bt eax,ecx; ^reversed logo 29-bit bitmask%10 salc ; xor al,al=ascii(NUL)~space glyph=mov al,20h jnc c ; cf=block (ie: non-space) mov al,0dbh ; block glyph c:int 29h ; fast putch(al) mov al,cl ; al=cl aam 0ah ; =aam 10=>ah=cl/10 al=cl%10 jnz e ; time for crlf-2*rows ? mov w[fs:450h],ax ; bda curs pos col=[40:50h]=cx%10 row=[40:51h]=int(cx/10) e:loop a ; process 30 bits std ; draw bottom to top fld d[bx] ; load angle start f:mov es,w[bx] ; bx=0 entering or looping mov cl,52h ; checker board 3d plane height=82 pixels inc bp ; increase timer g:mov si,0a0h ; yloop checker board 3d plane rightmotst (160) limit h:mov ah,54h ; xloop load delta=cos([counter]/9*pi^2) cwd ; xor dx,dx div cx ; ax=ax/delta mov bl,al ; bl=depth mul si ; dx:ax=ax*si mov al,ah ; shr ax,8 add bx,bp ; bp is k*rtc advance checker board z xor al,bl ; checker board row column parity and al,40h ; checker board single checker size add al,0c8h ; 3d checkerboard single checker color stosb ; plot checkerboard single checker point shld ax,cx,0dh ; rasterbars routine 248b mov ax,cx/shr al,1 add al,50h ; rasterbars sky base color mov [es:di-62bfh],al; rasterbars bottom of gradient dec si ; beam right to left cmp si,0ff60h ; checkboard 3d plane leftmotst (-160) limit jnz h ; continue checkboard 3d plane horizontal loop loop g ; continue checkboard 3d plane vertical loop not si ; si=not(ff60h)=159d < this com's 256 org (psp) i:sub di,bp ; plot destination-=timer j:lodsb ; parallax starfield : load PSP=starfield test al,al ; differenciate xyyyyyyb parallax starfield stars js i ; if bit7=1 decrease destination by subtracting timer imul si ; prettify scatter starfield across vga display sub di,ax ; star's absolute coordinates base movement mov al,0ffh ; parallax starfield star's color stosb ; plot this star or si,si ; if si>0 jnz j ; continue starfield routine mov bx,168h ; bx=320+40 ; moutain ridge val (+40 for bx remainder) mov di,0aeefh ; 0aeefh; di=mountain ridge start loc fff9h para fixup k:sub di,141h ; MOUTAINS assume mountain ridge slope direction up xlatb ; read a mountain ridge slope value (flags unaffected) aaa ; randomize mountain ridge peak value (affect flags) jp l ; determine mountain ridge slope direction add di,280h ; fallthrough moutain ridge slope direction correct down l:mov si,di ; preserve mountain ridge peak row value m:mov b[es:si],cl ; moutain color is black add si,140h ; get next moutain row point cmp si,0d46fh ; if row height < (mountain height-para fixup) jc m ; continue filling mountain row dec bx ; else decrease mountain column cmp bx,28h ; total 320+remainder rows (ie 40) processed ? jnz k ; if not continue drawing moutain n:cwd ; xor dx,dx=cx%40 mov ax,cx ; cube volume 40^3<2^16<seg div bx ; divide by mountain loop remainder push dx ; push first coordinate cwd ; xor dx,dx div bx ; ax=ax/40 push ax ; push second coordinate push dx ; push third coordinate ax%40 mov si,sp ; address stack with si fild w[si+4] ; z coord of cloud cube point fild w[si+2] ; y coord of cloud cube point fild w[si] ; x coord of cloud cube point call p ; rotate around x axis call p ; rotate around y axis => rotation around z axis fistp w[si] ; dst=y2 coord of cloud cube point add w[si],64h ; dst->y2+=100 vert centerize imul di,[si],140h ; dst->y2*=line width fistp w[si] ; x coord of cloud cube point add di,[si] ; dst+=x fistp w[si] ; z coord of cloud cube point sub di,bp ; horizontal translation=-k*timer lodsb ; z coord cube color delta add al,90h ; z coord cubes base color cmp al,[di] ; if al>z buffer jna o ; then replace value aam 6 ; ah=al/6 al=al%6 mov al,ah ; al=al/6 stosb ; 1st cube point cloud not di ; inverse coords by negation stosb ; overlap to simulate 3rd cube o:xor sp,sp ; stack reinitialisation loop n ; while( --cx ) goto points; fiadd w[q] ; increase cube rotation angle (cs:018ah=e85800h) mov bl,cl ; xor bl,bl_>bx=0 les si,[bx] ; es=09fffh si=0 mov fs,si ; fixed segment mov ch,0beh ; cx=152*320 points to copy mov di,0e8aeh ; physical screen dst start fs rep movsb ; fs src prefix override jmp f ; x y z a p:fld st3 ; a x y z a fsincos ; ca sa x y z a fmul st0,st2 ; x*ca sa x y z a fxch st1 ; sa x*ca x y z a fmul st0,st3 ; y*sa x*ca x y z a faddp st1,st0 ; y*sa+x*ca x y z,a fld st4 ; a y*sa+x*ca x y z a fsincos ; ca sa y*sa+x*ca x y z a fmulp st4,st0 ; sa y*sa+x*ca x y*ca z a fmulp st2,st0 ; y*sa+x*ca x*sa y*ca z a fxch st1 ; x*sa y*sa+x*ca y*ca z a fsubp st2,st0 ; y*sa+x*ca y*ca-x*sa z a fxch st2 ; z y*sa+x*ca y*ca-x*sa a ret ; z x2 y2 a org 7 ; 0 word loc far call to CP/M compatibility q db 58h ; step angle increment
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