// Exemplo de arquivo de descricao de cena para POV-ray
// Last edited on 2017-05-07 20:10:09 by stolfilocal

// ======================================================================
// CORES E TEXTURAS

background{ color rgb < 1.0, 1.0, 1.00 > }

#declare tx_plastico = 
  texture{
    pigment{ color rgb < 0.10, 0.80, 1.00 > }
    finish{ diffuse 0.8 ambient 0.1 specular 0.5 roughness 0.005 }
  }

#declare tx_fosca = 
  texture{
    pigment{ color rgb < 1.00, 0.80, 0.10 > }
    finish{ diffuse 0.9 ambient 0.1 }
  }

#declare tx_espelho = 
  texture{
    pigment{ color rgb < 1.00, 0.85, 0.30 > }
    finish{ diffuse 0.2 reflection 0.7*< 1.00, 0.85, 0.30 > ambient 0.1 }
  }

#declare tx_vidro = 
  texture{
    pigment{ color rgb < 0.8, 0.8, 0.8 > filter 0.70 }
    finish{ diffuse 0.03 reflection 0.1 ambient 0.02 specular 0.25 roughness 0.005 }
  }


#declare tx_xadrez =
  texture{
    pigment{ checker color rgb < 0.10, 0.32, 0.60 >, color rgb < 1.00, 0.97, 0.90 > }
    finish{ diffuse 0.9 ambient 0.1 }
    scale 2.0
  }
  
 #declare tx_teste =
	texture{
	pigment{ color rgb < 0.9, 0.90, 0.1 > }
    finish{ diffuse 0.8 ambient 0.1 specular 0.5 roughness 0.005 }
	}

// ======================================================================
// DESCRIÇÃO DA CENA 


// Partes da cena:

#macro corda(nVol, raio, esp)
  
   #declare r= seed(10);
   #declare i = 0;
   #declare pos = array[nVol];
   #declare compl = array[nVol];
   #declare j = 0;
   
   #while (j < 3)
  
     #declare j = (-1 * j) * sin(rand(r));
     #declare k = (-1 * j) * cos(rand(r));   
       
        #while (i < nVol)
             #declare j = j + esp;
             #declare k = k + esp;
		     #declare  pos[i] = <0, 0.5*sin(j), 0.6*k>;
		     #declare compl[i] = <0, 0.5*cos(j), 0.6*k >;
		 
	     #declare i = i + 1;
        #end
   
      #declare l = 0;
    
       #while (l < nVol)
       
          
          object {sphere {pos[l] , raio texture{tx_vidro} translate <0,-cos(j), 0>}}  
          object {sphere {compl[l] , raio texture{tx_vidro} translate <0,0,0>}}
          
         
	 
	   #declare l = l + 1; 
	   #end
      
   #declare j = j + 1;  
   #end
#end
  

#include "eixos.inc"

// Aqui está a cena, finalmente:

union{
  object{ eixos(3.00) }
  corda(100,0.1, 0.05)

 }


#include "camlight.inc"
#declare centro_cena = < 0.00, 0.00, 1.00 >;
#declare raio_cena = 6.0;
#declare dir_camera = < 14.00, 7.00, 4.00 >;
#declare dist_camera = 20*raio_cena;
#declare intens_luz = 1.20;
camlight(centro_cena, raio_cena, dir_camera, dist_camera , z, intens_luz)