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

#declare tx_plastico = 
    texture {
        pigment{ color rgb < 0.90, 0.90, 0.90 > }
        finish{ diffuse 0.8 ambient 0.1 specular 0.5 roughness 0.005 }
    }

#declare cilindro_vertice_dois =
    cylinder {
        <0, 0, -1>, <0, 0, 1>, 1 // center of one end, center of other end, radius
        open // remove end caps
        texture {tx_plastico}
    }

#declare esfera_vertice_dois =
    sphere {
        <0, 0, 2>, 1 // <x, y, z>, radius
        texture {tx_plastico}
    }

#declare aresta_horizontal_y =
    cylinder {
        <0, 0, 0>, <0, 1, 0>, 0.3 // center of one end, center of other end, radius
        open // remove end caps
        texture {tx_plastico}
    }

#declare vertice_dois =
    union {
        object {cilindro_vertice_dois}
        object {esfera_vertice_dois}
        object {aresta_horizontal_y translate <0, 1, 0>} // <x, y, z>
        object {aresta_horizontal_y translate <0, -2, 0>}
    }

#declare box_vertice_tres =
    box {
        <-1, -1, -1>, <1, 1, 1> // <x, y, z> near lower left corner, <x, y, z> far upper right corner
        texture {tx_plastico}
    }

#declare esfera_vertice_quatro =
    sphere {
        <0, 0, 2>, 1 // <x, y, z>, radius
        texture {tx_plastico}
    }

#declare aresta_horizontal_x =
    cylinder {
        <0, 0, 0>, <1, 0, 0>, 0.3 // center of one end, center of other end, radius
        open // remove end caps
        texture {tx_plastico}
    }

#declare cone_tres = 
    cone {
        <0, 0, 1>, 0.5 // <x, y, z>, center & radius of one end
        <0, 0, 2>, 0.25 // <x, y, z>, center & radius of the other end
        texture {tx_plastico}
    }

#declare vertice_tres =
    union {
        object {box_vertice_tres}
        object {cone_tres}
        object {aresta_horizontal_y translate <0, 1, 0>}
        object {aresta_horizontal_y translate <0, -2, 0>}
        object {aresta_horizontal_x translate <1, 0, 0>}
    }

#declare vertice_quatro =
    union {
        object {box_vertice_tres}
        object {esfera_vertice_quatro}
        object {aresta_horizontal_y translate <0, 1, 0>}
        object {aresta_horizontal_y translate <0, -2, 0>}
        object {aresta_horizontal_x translate <1, 0, 0>}
        object {aresta_horizontal_y translate <0, 1, 2>}
    }

// #macro interpola1(t, t0, v0, t1, v1)
//     #local ss = (t - t0) / (t1 - t0);
//     #local vv = (1 - ss) * v0 + ss * v1;
//     vv
// #end

// #macro interpola3(t, ta, tb, v0, v1, v2, v3)
//     #local v01 = interpola1(t, ta, v0, tb, v1);
//     #local v12 = interpola1(t, ta, v1, tb, v2);
//     #local v23 = interpola1(t, ta, v2, tb, v3);
//     #local v012 = interpola1(t, ta, v01, tb, v12);
//     #local v123 = interpola1(t, ta, v12, tb, v23);
//     #local v023 = interpola1(t, ta, v012, tb, v123);
//     v023
// #end

union {
    object {vertice_dois}
    object {vertice_tres translate <0, 4, 0>}
    object {vertice_quatro translate <0, -4, 0>}
}

// #declare x = interpola1(3, 6, <0, 0, 0>, 8, <2, 3, 2>);

#include "camlight.inc"
#declare centro_cena = < 0.00, 0.00, 0.00 >;
#declare raio_cena = 10.0;
#declare dir_camera = < 14.00, 7.00, 4.00 >;
#declare dist_camera = 5*raio_cena;
#declare intens_luz = 1.20;
camlight(centro_cena, raio_cena, dir_camera, dist_camera , z, intens_luz)