Created
August 24, 2014 20:38
-
-
Save deathowl/6a410fcb92a18b02db1f to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#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);}} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment