#include <stdlib.h>   // card > aek.ppm
    #include <stdio.h>
    #include <math.h>
    typedef int i;typedef float f;struct v{
    f x,y,z;v operator+(v r){return v(x+r.x
    ,y+r.y,z+r.z);}v operator*(f r){return
    v(x*r,y*r,z*r);}f operator%(v r){return
    x*r.x+y*r.y+z*r.z;}v(){}v operator^(v r
    ){return v(y*r.z-z*r.y,z*r.x-x*r.z,x*r.
    y-y*r.x);}v(f a,f b,f c){x=a;y=b;z=c;}v
    operator!(){return*this*(1/sqrt(*this%*
    this));}};i G[]={247570,280596,280600,
    249748,18578,18577,231184,16,16};f R(){
    return(f)rand()/RAND_MAX;}i T(v o,v d,f
    &t,v&n){t=1e9;i m=0;f p=-o.z/d.z;if(.01
    <p)t=p,n=v(0,0,1),m=1;for(i k=19;k--;)
    for(i j=9;j--;)if(G[j]&1<<k){v p=o+v(-k
    ,0,-j-4);f b=p%d,c=p%p-1,q=b*b-c;if(q>0
    ){f s=-b-sqrt(q);if(s<t&&s>.01)t=s,n=!(
    p+d*t),m=2;}}return m;}v S(v o,v d){f t
    ;v n;i m=T(o,d,t,n);if(!m)return v(.7,
    .6,1)*pow(1-d.z,4);v h=o+d*t,l=!(v(9+R(
    ),9+R(),16)+h*-1),r=d+n*(n%d*-2);f b=l%
    n;if(b<0||T(h,l,t,n))b=0;f p=pow(l%r*(b
    >0),99);if(m&1){h=h*.2;return((i)(ceil(
    h.x)+ceil(h.y))&1?v(3,1,1):v(3,3,3))*(b
    *.2+.1);}return v(p,p,p)+S(h,r)*.5;}i
    main(){printf("P6 512 512 255 ");v g=!v
    (-6,-16,0),a=!(v(0,0,1)^g)*.002,b=!(g^a
    )*.002,c=(a+b)*-256+g;for(i y=512;y--;)
    for(i x=512;x--;){v p(13,13,13);for(i r
    =64;r--;){v t=a*(R()-.5)*99+b*(R()-.5)*
    99;p=S(v(17,16,8)+t,!(t*-1+(a*(R()+x)+b
    *(y+R())+c)*16))*3.5+p;}printf("%c%c%c"
    ,(i)p.x,(i)p.y,(i)p.z);}}

Hubis fucked around with this message at 11:18 on Jun 16, 2015

Hubis fucked around with this message at 22:55 on Dec 18, 2015

0.4124564  0.3575761  0.1804375
 0.2126729  0.7151522  0.0721750
 0.0193339  0.1191920  0.9503041

x = X / (X+Y+Z)
y = Y / (X+Y+Z)
Y = Y

x_sim = K_red*x_red + K_yellow*x_yellow + K_green*x_green + K_cyan*x_cyan + K_blue*x_blue + K_magenta*x_magenta
y_sim = K_red*y_red + K_yellow*y_yellow + K_green*y_green + K_cyan*y_cyan + K_blue*y_blue + K_magenta*y_magenta

Hubis fucked around with this message at 20:25 on Jan 12, 2016