// Persistence of Vision Ray Tracer Scene Description File // File: ?.pov // Vers: 3.6 // Desc: Basic Scene Example // Date: mm/dd/yy // Auth: ? //            #version 3.6;  #include "colors.inc"  global_settings {   assumed_gamma 2.1       // used in global_settings, sets an overall brightness/ambient light level in the scene   ambient_light color rgb <1,1,1>/10 }  // ----------------------------------------  camera {   location  <+0.3, 0.5, -4.0>     // -0.2  0.0  +0.2    //  -0.3 -0.1 +0.1 +0.3   direction 1.5*z   right     x*image_width/image_height   look_at   <0.0, 0.0,  0.0> }  sky_sphere {   pigment {     gradient y     color_map {       [0.0 rgb <0.6,0.7,1.0>]       [0.7 rgb <0.0,0.1,0.8>]     }   } }  light_source {   <-50, 40, -60>            // light's position (translated below)   color rgb <1, 0, 0>  // light's color }       light_source {   <50, 40, -60>            // light's position (translated below)   color rgb <0, 1, 0>  // light's color }  light_source {   <0, 190, -60>            // light's position (translated below)   color rgb <0, 0, 1>  // light's color    }  // ----------------------------------------  plane {   y, -1.3   pigment { color rgb <0.7,0.5,0.3> } }  #declare ba=15; #declare bb=15;  //6 , 9 ,    , 15 #declare b1=max(ba,bb);  #declare s=sqrt(3)/2;             //tube armchair #declare bb=bb+6;  //6 , 9 ,    , 15 #declare r=(bb-6)/pi; #macro ab2y(b,a) sin(a/r)*r   #end #macro ab2x(b,a)  b  #end #macro ab2z(b,a)  cos(a/r)*r  -r #end        /* //rim armchair #declare r=(bb-6)/pi*3; #macro ab2y(b,a) sin(a/r)*r    #end #macro ab2x(b,a)  b  #end #macro ab2z(b,a)  cos(a/r)*r  -r #end   */    /* //ribbon #macro ab2x(a,b) a  #end #macro ab2y(a,b)  b  #end #macro ab2z(a,b)  0  #end          */      /* //rim zizag #declare r=(ba*s)/pi*3; #macro ab2x(a,b) sin(a/r)*r  #end #macro ab2y(a,b)  b  #end #macro ab2z(a,b)  cos(a/r)*r -r #end           */      /*    //tube zizag #declare ba=ba+2; #declare r=(ba*s)/pi; #macro ab2x(a,b) sin(a/r)*r  #end #macro ab2y(a,b)  b  #end #macro ab2z(a,b)  cos(a/r)*r  -r #end    */     union{     #declare m = -b1; #while (m < b1) #declare n = -b1; #while (n < b1) //#declare BallCount = 0; // #while (BallCount < 2*pi)                 #declare a0=(n*2+m)*s   ;                 #declare b0=m*1.5        ;                  #if  ((a0<ba) & (a0>-ba) & (b0<bb) & (b0>-bb) )         union{                                              #if (b0>-bb+2)                 sphere {< ab2x(a0,b0), ab2y(a0,b0),ab2z(a0,b0)>, 0.5         }                 #end                 #if ((b0<bb-2) & (b0>-bb+2))                 cylinder {< ab2x(a0,b0), ab2y(a0,b0),ab2z(a0,b0)>,< ab2x(a0,b0+1), ab2y(a0,b0+1),ab2z(a0,b0+1)>,  0.35 }                 #end                 #if (b0<bb-2)                 sphere {< ab2x(a0,b0+1), ab2y(a0,b0+1),ab2z(a0,b0+1)>, 0.5         }                                  #if (a0+s<ba)                 cylinder {< ab2x(a0,b0+1), ab2y(a0,b0+1),ab2z(a0,b0+1)>,< ab2x(a0+s,b0+1.5), ab2y(a0+s,b0+1.5),ab2z(a0+s,b0+1.5)>,  0.35 }                 #end                 #if (a0-s>-ba)                 cylinder {< ab2x(a0,b0+1), ab2y(a0,b0+1),ab2z(a0,b0+1)>,< ab2x(a0-s,b0+1.5), ab2y(a0-s,b0+1.5),ab2z(a0-s,b0+1.5)>,  0.35 }                 #end                 #end         }         #end                //  rotate <0,BallCount*60,0>}                //  rotate <0,BallCount*60-30,0>} // #declare BallCount = BallCount+pi/3;   // increment our counter //  #end #declare n = n+1;   // increment our counter #end #declare m = m+1;   // increment our counter #end           texture {             pigment {                 color rgb <1,1,1>*0.7             }             finish{               specular 0.6             }          }      scale 0.08 //2    //  translate 0.4*z      rotate <90,45,0>      rotate <-20,0,0>    //  translate z         }