// MC930 - Computacao Grafica
// Quarto  exercicio de laboratorio - 26/10/2000
// Luis Arthur Micai Nunes   RA: 971106
     
background { color rgb < 0.00, 0.00, 0.00 > }

light_source { <0, 3.00, -3.00 >
    color rgb <1.00, 1.00, 1.00> 
    }
     
camera {
    location < 3.00, -2.00, -8.00 >
    look_at  < 3.00, 0.00, 0.00 >  
    }

#declare titulo = 
       text { ttf "arial.ttf"
       "LUX"
       1.0 0.0
       texture { pigment {color rgb <0,0,1> } }
       scale <1.2,1.2,1.2>
     }

#declare logo = 
      sphere { <0,0,0>
               0.2
               texture { pigment { color rgb <0,0,1> } }
               translate <0.8,0.9,0>               
               scale <1.2,1.2,1.2>
}

#declare recorte = 
      cylinder {
              <-0.05, 0, 0>,
              <0.05, 0, 0>,
              0.3
              translate <0.8, 0.9, 0>
              scale <1.2,1.2,1.2>
              texture { pigment { color rgb < 0.00, 0.00, 1.00 > }
              }
      }

#declare figura =
   
 union { 
    difference{    
            object {logo}
            object {recorte}
    }
   object {titulo}
}

#declare freq = mod(clock*4,1)

#declare altura = ( freq<0.5 ? 10*freq : 10*(1-freq) )

object {figura
       translate <10*clock, 0, freq>
       }