// Last edited on DATE TIME by USER
// Processed by remove-cam-lights

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

#declare tx_plastico =
  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_polvo =
  texture{
    pigment{ color rgb < 0.50, 0.10, 0.80 > }
    finish{ diffuse 0.9 ambient 0.1 }
  }

#declare tx_xadrez =
  texture{
    pigment{ checker color rgb < 0.10, 0.32, 0.60 >, color rgb < 1.00, 0.97, 0.80 > }
    finish{ diffuse 0.9 ambient 0.1 }
    scale 2.0
  }

#declare raio = 2.000;

#declare bolinha =
  sphere{ < 0,0,0 >, 0.05 }

#macro interpola(P0, P1, tt)
  ((1 - tt) * P0 + tt * P1)
#end

#macro interpola4(P0, P1, P2, P3, tt)
  #local P01 = interpola(P0, P1, tt);
  #local P12 = interpola(P1, P2, tt);
  #local P23 = interpola(P2, P3, tt);

  #local P012 = interpola(P01, P12, tt);
  #local P123 = interpola(P12, P23, tt);

  #local P0123 = interpola(P012, P123, tt);
  P0123
#end

#macro curva(P0, P1, P2, P3)
  #local tt = 0.0;
  #while(tt <=  1.0)
    object{ bolinha translate interpola4(P0, P1, P2, P3, tt) texture{ tx_polvo } }
    #local tt = tt + 0.02;
  #end
#end

#macro curva_raios(P0, R0, P1, R1, P2, R2, P3, R3)
union {
  #local tt = 0.0;
  #while(tt <=  1.0)
    #local centro = interpola4(P0, P1, P2, P3, tt);
    #local raio = interpola4(R0, R1, R2, R3, tt);
    #local bola = sphere{ <0,0,0>, interpola4(R0, R1, R2, R3, tt) }
    object{ bola translate interpola4(P0, P1, P2, P3, tt) texture{ tx_polvo }}
    #local tt = tt + 0.05;
  #end
}
#end

#macro tentaculo(P0, P1, P2, Q1, Q2, Q3, R0, R1)
union {
  #local ponto_medio = (P2 + Q1) / 2;
  #local ponto_medio_raio = (R0 + R1) / 2;
  curva_raios(
    P0, R0,
    P1, interpola(R0, ponto_medio_raio, 0.33),
    P2, interpola(R0, ponto_medio_raio, 0.66),
    ponto_medio, ponto_medio_raio
  )

  curva_raios(
    ponto_medio, ponto_medio_raio,
    Q1, interpola(ponto_medio_raio, R1, 0.33),
    Q2, interpola(ponto_medio_raio, R1 0.66),
    Q3, R1
  )
}
#end

#macro polvo()
union {
  #local TT10 = <0, 0, 0>;
  #local TT11 = <2, 2 * sin(clock * 4 * pi), 2 * sin(clock * 4 *pi)>;
  #local TT12 = <4, 4, 0.5 * cos(clock * 4 * pi)>;
  #local TT13 = <6, 6 * sin(clock * pi), 1 * sin(clock * 4 * pi)>;
  #local TT14 = <8, 8, 0.5 * sin (clock*4*pi)>;
  #local TT15 = <10, 10, 0.2 * cos(clock * 4 * pi)>;

  #local TT20 = <0, 0, 0>;
  #local TT21 = <2, 2, 2 * sin(clock *2 * pi)>;
  #local TT22 = <4, 4 * sin(clock *2 * pi), 0.5>;
  #local TT23 = <6, 6, 1 * sin(clock * 2 *pi)>;
  #local TT24 = <8, 8 * sin(clock *2 * pi), 0.5 * sin(clock * 2 *pi)>;
  #local TT25 = <10, 10, 0.2 * sin(clock * 2 *pi)>;

  #local TT30 = <0, 0, 0>;
  #local TT31 = <2, 2 * cos(clock * 2*pi), 2 * cos(clock * 2*pi)>;
  #local TT32 = <4, 4, 0.5 * sin(clock * 2*pi)>;
  #local TT33 = <6, 6 * cos(clock * 2*pi), 1 * cos(clock * 2*pi)>;
  #local TT34 = <8, 8, 0.5 * cos(clock * 2*pi)>;
  #local TT35 = <10, 10, 0.2 * sin(clock * 2*pi)>;

  #local tent1 = tentaculo(TT10, TT11, TT12, TT13, TT14, TT15, 1, 0.1)
  #local tent2 = tentaculo(TT20, TT21, TT22, TT23, TT24, TT25, 0.8, 0.2)
  #local tent3 = tentaculo(TT30, TT31, TT32, TT33, TT34, TT35, 0.7, 0.1)

  object { tent3 }
  object { tent1 rotate <0, 0, 120> }
  object { tent2 rotate <0, 0, 240> }

  sphere { <0,0,2>, 1 texture{ tx_polvo }}

}
#end

#declare P0 = <0, 0, 0>;
#declare P1 = <1, 1, 2>;
#declare P2 = <2, 2, 1>;
#declare P3 = <3, 3, 3>;

#declare Q0 = <5, 0, 1>;
#declare Q1 = <6, 2, 1>;
#declare Q2 = <7, 2, 1>;
#declare Q3 = <8, 0, 1>;

#declare R0 = Q3;
#declare R1 = <6, -2, 0>;
#declare R2 = <7, -2, 0>;
#declare R3 = Q0;

#declare W0 = <0, 0, 0>;
#declare W1 = <0, 1, 1>;
#declare W2 = <1, 2, 4>;
#declare W3 = <2, 3, 2>;

#declare chao =
  box{ <-20,-20,-1>, <+20,+20,0> }

#include "eixos.inc"

union{
  object{ chao  translate < 0,0,-1 > texture{ tx_xadrez } }
  polvo()
}

#include "camlight.inc"
#declare centro_cena = < 0.00, 0.00, 0.00 >;
#declare raio_cena = 12.0;
#declare dir_camera = < 14.00, -3.00, 10.00 >;
#declare dist_camera = 16.0;
#declare intens_luz = 1.00;
camlight(centro_cena, raio_cena, dir_camera, dist_camera , z, intens_luz)