// Last edited on 2003-06-24 15:22:00 by stolfi

#include "colors.inc"

#declare A11 = <-0.5,-2.6,0.3>;
#declare A21 = <0,-2.6,0.1>;
#declare A31 = <0,-2.6,-0.1>;
#declare A41 = <-0.5,-2.6,-0.3>;

#declare A12 = <-0.5,-2.3,0.5>;
#declare A22 = <0,-2.3,0.15>;
#declare A32 = <0,-2.3,-0.15>;
#declare A42 = <-0.5,-2.3,-0.5>;

#declare A13 = <-0.5,-2,0.7>;
#declare A23 = <0,-2,0.2>;
#declare A33 = <0,-2,-0.2>;
#declare A43 = <-0.5,-2,-0.7>;

#declare A14 = <-0.5,-1.7,0.8>;
#declare A24 = <0,-1.7,0.25>;
#declare A34 = <0,-1.7,-0.25>;
#declare A44 = <-0.5,-1.7,-0.8>;

#declare B11 = A14;
#declare B21 = A24;
#declare B31 = A34;
#declare B41 = A44;

#declare B12 = <-0.5,-1.4,0.9>;
#declare B22 = <0,-1.4,0.3>;
#declare B32 = <0,-1.4,-0.3>;
#declare B42 = <-0.5,-1.4,-0.9>;

#declare B13 = <-0.5,-1.1,0.9>;
#declare B23 = <0,-1.1,0.3>;
#declare B33 = <0,-1.1,-0.3>;
#declare B43 = <-0.5,-1.1,-0.9>;

#declare B14 = <-0.5,-0.8,0.8>;
#declare B24 = <0,-0.8,0.25>;
#declare B34 = <0,-0.8,-0.25>;
#declare B44 = <-0.5,-0.8,-0.8>;

#declare C11 = B14;
#declare C21 = B24;
#declare C31 = B34;
#declare C41 = B44;
 
#declare C12 = <-0.5,-0.5,0.7>;
#declare C22 = <0,-0.5,0.2>;
#declare C32 = <0,-0.5,-0.2>;
#declare C42 = <-0.5,-0.5,-0.7>;

#declare C13 = <-0.5,-0.2,0.6>;
#declare C23 = <0,-0.2,0.1>;
#declare C33 = <0,-0.2,-0.1>;
#declare C43 = <-0.5,-0.2,-0.6>;

#declare C14 = <-0.5,0.1,0.3>;
#declare C24 = <0,0.1,0>;
#declare C34 = <0,0.1,0.00001>;
#declare C44 = <-0.5,0.1,-0.3>;

#declare bz_scale = 0.075;
#include "../../bz-things.inc"

#declare marrom =
  texture {

    pigment { color rgb < 0.77, 0.43, 0.13 > }
    finish { diffuse 0.5 specular 0.5 roughness 0.005 ambient 0.1 }
  }

#declare retalho1 = 
  union{
    bicubic_patch{
      type 1
      flatness 0.001
      v_steps 4 u_steps 4
      A11,A12,A13,A14,
      A21,A22,A23,A24,
      A31,A32,A33,A34,
      A41,A42,A43,A44
      texture { bz_tx_A }
    }
    object { bz_grid_A }
  }

#declare retalho2 = 
  union{
    bicubic_patch{
      type 1
      flatness 0.001
      v_steps 4 u_steps 4
      B11,B12,B13,B14,
      B21,B22,B23,B24,
      B31,B32,B33,B34,
      B41,B42,B43,B44
      texture { bz_tx_B }
    }
    object { bz_grid_B }
  }

#declare retalho3 = 
  union{
    bicubic_patch{
      type 1
      flatness 0.001
      v_steps 4 u_steps 4
      C11,C12,C13,C14,
      C21,C22,C23,C24,
      C31,C32,C33,C34,
      C41,C42,C43,C44
      texture { bz_tx_C }
    }
    object { bz_grid_C }
  }

#declare scene = 
  union{
    union{
      object{retalho1 translate<0.5,0,0>}
      object{retalho2 translate<0.5,0,0>}
      object{retalho3 translate<0.5,0,0>}
      object{retalho1 translate<0.5,0,0> scale<-1,1,1>}
      object{retalho2 translate<0.5,0,0> scale<-1,1,1>}
      object{retalho3 translate<0.5,0,0> scale<-1,1,1>}
      translate 1.5*y
    }
    rotate -90*x
    rotate 90*y
  }

object{ bz_checker_bg }
object{ scene translate bz_scale*<-11,0,0> }
object{ scene rotate -90*y translate bz_scale*<+18.0,0,+9.0> }