// Trabalho de laboratorio numero 5
// O Templo de Pífio
// MP004 -1s/2001
// Aluna: Simone da Silva Amorim

background{ color rgb < 0,0.95,0.4 > }

light_source {
  < 8.00, 2.00, 4.00 >
  color rgb < 1.00, 1.00, 1.00 >
} 

camera {
  location  < 10.00, 8.00, 2.00 >
  right     < -0.80, 0.00, 0.00 >
  up        <  0.00, 0.00, 0.60 >
  sky       <  0.00, 0.00, 1.00 >
  look_at   <  0.00, 0.00, 0.00 >
} 


#declare chao =
    #declare gerador = seed(12345678);
    #declare f=0.5+0.2*rand(gerador);  // Cor aleatória para o chão
    plane { <0, 0, 1>, -2
    pigment{ checker <0,f,f>,<0,f,1>}
    }

#declare arco =difference{
     torus { 0.4, 0.07
       rotate -90*z
       pigment { color rgb <1,0,0> }
     }
     plane{<0,0,1>0}
     }

#declare escada =
union{
   #declare i=0;
   #declare a=-2;
   #declare c=0;
   #while (i<4)
      box{<a,-1,c-0.5>,<a+1,1,c>
      pigment{color rgb <0,0,1>} }
      cylinder{<a+0.5,-1.2,c>,<a+0.5,-1.2,c+3>,0.2 pigment{color rgb <1,1,0>}}
      object{ arco translate <a+0.5,-1.2,c+2.7>}
      object{ arco rotate -180*y translate <a+0.5,-1.2,c+3.6>}
      #declare a=a+1;
      #declare c=c-0.5;
      #declare i=i+1;
   #end
}


#declare torre =
union{
   box{ <-5,-1,0>, <-2,1,3>  pigment{color rgb <1,1,0>} }
   #declare gerador = seed(123456);
   #declare k=0.5+0.5*rand(gerador);
   #if (k<0.7) //A porta será quadrada
     box{ <-2,-0.5,0>, <-1.7,0.5,2>  pigment{color rgb <0,0,0>}  }
   #else  // A porta será redonda
     blob {
       threshold .65
       cylinder { <-2,0,0>,<-2,0,1.5>, 1,1 pigment {color rgb <0,0,0>}}
       sphere { <-2,0,2>, 0.5 ,1 pigment {color rgb <0,0,0> } }
    }
   #end
   }

// Aqui está a cena, finalmente:

object { escada}
object { torre}
object { chao}