// Exemplo de arquivo de descricao de cena para POV-ray
// Last edited on 2010-03-04 15:44:01 by stolfi

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

background{ color rgb < 0.75, 0.80, 0.85 > }

#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 < 0.85, 0.95, 1.00 > filter 0.70 }
    finish{ diffuse 0.03 reflection 0.25 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
  }

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


#macro interpola(t0,v0,t1,v1,tt)
    #local ss= (tt-t0)/(t1-t0);
    #local rr= 1-ss;
    (rr*v0 + ss*v1)
#end

#macro interpola4(t0,v0,v1,v2,v3,t3,tt)
    #local v01 = interpola(t0,v0,t3,v1,tt);
    #local v12 = interpola(t0,v1,t3,v2,tt);
    #local v23 = interpola(t0,v2,t3,v3,tt);
    #local v012 = interpola(t0,v01,t3,v12,tt);
    #local v123 = interpola(t0,v12,t3,v23,tt);
    interpola(t0,v012,t3,v123,tt)
#end

#macro grafico(x0,y0,y1,y2,y3,x3,n)
    union {

    #local i = 0;
    #local xx = x0;
    #local delta = (x3-x0)/n ;
    
    #while (i < n)
        
        #local yy = interpola4(x0,y0,y1,y2,y3,x3,xx);
        object { 
            sphere{
                < xx, yy, 0 >, 0.03
                
            } 
            texture{ tx_plastico}
        }
        #local xx = xx + delta;
        #local i = i+1;
    #end
    
    }
#end

#macro graficos(x0,y0,y0,y1,y2,y3,y4,y5,y6,y7,y8,y9,x1,x2,x3,x4,n)

    union {
        object{ grafico(x0,y0,y1,y2,(y2+y3)/2,x1,n) }
        object{ grafico(x1,(y2+y3)/2,y3,y4,(y4+y5)/2,x2,n) }
        object{ grafico(x2,(y4+y6)/2,y5,y6,(y6+y7)/2,x3,n) }
        object{ grafico(x3,(y6+y7)/2,y7,y8,(y8+y9)/2,x4,n) }
    }

#end
        

#include "eixos.inc"

union {
    object{eixos(3.00)}

    object { graficos( 1,1,-1,4,2,5,1,1,4,2,5,12,13,14,15,16,100 ) }

    //object{ grafico(1,1,-1,4,2,5,100) }
}

#include "camlight.inc"
#declare centro_cena = < 0.00, 0.00, 1.00 >;
#declare raio_cena = 10.0;
#declare dir_camera = < 14.00, 7.00, 4.00 >;
#declare dist_camera = 16.0;
#declare intens_luz = 1.00;
camlight(<0,0,1*clock>, raio_cena, dir_camera, dist_camera , z, intens_luz)