"Tor Olav Kristensen" <tor### [at] TOBEREMOVEDgmailcom> wrote:
> "John Greenwood" <joh### [at] john-greenwoodcouk> wrote:
> ....
> > // Rounded objects: Illustration of R_Surface
> ....
> >   #declare R_function = function( p,F){
> >     select(-(p<=-1) , select((F>1)-(F<-1) , -1 , F , 1)+1
> >                  , select(-(p!=1) , select((F>1)-(F<-1) , -1 ,
> > ..5*p*pow(F,5)-(p+.5)*pow(F,3)+(1.5+.5*p)*F , 1)+1
> >                                ,F/(sqrt(.17+pow(F,2))) +1
> >            ) )
> >                                  }
> ....
> >   #declare R_S_function = function( p,x,y,z,F){
> >     select(-(p<=-1) , select((F>1)-(F<-1) , -1 , F , 1)+1
> >                  , select(-(p!=1) , select((F>1)-(F<-1) , -1 ,
> > ..5*p*pow(F,5)-(p+.5)*pow(F,3)+(1.5+.5*p)*F , 1)+1
> >                                ,F/(sqrt(.17+pow(F,2))) +1
> >            ) )
> >                                  }
>
> It seems to me that the R_function(p, F) and the R_S_function(p, x, y, z, F)
> above will give the same result, as the x, y and z values are not used in the
> R_S_function.
>
> Is this what you intended ?
>
> --
> Tor Olav
> http://subcube.com

Yes I think so. It seems that the x,y,z is needed when it is a function within a
function as in R_Surface.  I am nesting functions 5 deep and it looks like the
x,y,z needs to be "passed down" but I am not clear exactly what the rules are.
The x,y,z is a bit of clutter for the user.

Post a reply to this message