#version unofficial megapov 0.6;

#declare S=.5; /* base size */
#declare S2=S/2;
#declare S4=S/4;
#declare D=S*sqrt(2);
#declare D2=D/2;
#declare H=S*sqrt(3)/2;
#declare RepeatSqrX=3*S+2*H;
#declare RepeatSqrY=S+2*H;

#declare FunMod=function{y*((x/y)-floor(x/y))}

//sqr
#declare FunSqr1=function{1-min(1,max(abs(x/S2),abs(y/S2)))}
#declare FunSqr2=function{FunSqr1(FunMod(x+S2,RepeatSqrX,0)-S2,y,0)}
#declare FunSqr3=function{FunSqr2(x,FunMod(y+S2,RepeatSqrY,0)-S2,0)}
#declare FunSqr4=function{pigment{
  function{FunSqr3(x,y,0)}
  translate <S2,-S2,0>
  rotate z*60
  translate S2
}}
#declare FunSqr5=function{pigment{
  function{FunSqr3(x,y,0)}
  translate <S2,S2,0>
  rotate -z*60
  translate <S2,-S2,0>
}}
#declare FunSqr6=function{FunSqr3(x+H+3*S2,y-(H+S2),0)}
#declare FunSqr7=function{FunSqr4(x-(H+3*S2),y-(H+S2),0)}
#declare FunSqr8=function{FunSqr5(x+H+3*S2,y-(H+S2),0)}
#declare FunSqr=function{FunSqr3+FunSqr4+FunSqr5+FunSqr6+FunSqr7+FunSqr8}

//tri
#declare FunTri1=function{1-max(0,min(x,S4))/S4}
#declare FunTri2=function{pigment{
  function FunTri1(x,y,0)
  rotate z*120
}}
#declare FunTri3=function{pigment{
  function FunTri1(x,y,0)
  rotate -z*120
}}
#declare FunTri4=function{min(FunTri1,min(FunTri2,FunTri3))}
#declare FunTri5=function{FunTri4(x+3*S4,y,0)}
#declare FunTri6=function{FunTri5(x,y,z)+FunTri5(-x,y,z)}
#declare FunTri7=function{FunTri6(FunMod(x+2*S,RepeatSqrX,0)-2*S,y,0)}
#declare FunTri8=function{FunTri7(x,FunMod(y+2*S,RepeatSqrY,0)-2*S,0)}
#declare FunTri9=function{FunTri8(x-(H+3*S2),y-(H+S2),0)}
#declare FunTri=function{FunTri8+FunTri9}

//six
#declare FunSix1=function{1-max(0,min(y,3*S4))/(3*S4)}
#declare FunSix2=function{pigment{
  function FunSix1(x,y,0)
  rotate z*60
}}
#declare FunSix3=function{pigment{
  function FunSix1(x,y,0)
  rotate z*120
}}
#declare FunSix4=function{pigment{
  function FunSix1(x,y,0)
  rotate z*180
}}
#declare FunSix5=function{pigment{
  function FunSix1(x,y,0)
  rotate z*240
}}
#declare FunSix6=function{pigment{
  function FunSix1(x,y,0)
  rotate z*300
}}
#declare FunSix7=function{min(FunSix1,min(FunSix2,min(FunSix3,
                 min(FunSix4,min(FunSix5,FunSix6)))))}
#declare FunSix8=function{FunSix7(FunMod(x+2*S,RepeatSqrX,0)-2*S,y,0)}
#declare FunSix9=function{FunSix8(x,FunMod(y+2*S,RepeatSqrY,0)-2*S,0)}
#declare FunSix=function{FunSix9(x,y,0)+FunSix9(x-(H+3*S2),y-(H+S2),0)}

#declare UseFun=function{FunTri+FunSqr+FunSix(x,y+S2+H,0)}

background{color rgb 0}

plane{z 10 pigment{function{UseFun}}}
light_source{1 1}