
void cpack(long hexad){
   float red, green, blue, alpha;
   red   = (hexad & 255)/255.;
   green = ((hexad >> 8) & 255)/255.;
   blue =  ((hexad >> 16)& 255)/255.;
   alpha = ((hexad >> 32)& 255)/255.;
   glColor4f(red,green,blue,alpha);
}

