Thanks for your help.

I have started experimenting with IC_Theshold function. This works with the
rounded cylinder.
However when I tried to use the rounded cone function I got an error. The
details are below:

//Rounded cone function declaration
#declare fn_1 = IC_Threshold( IC_Cone (-x, 0.2, x, 0.8), 0.2)

I get this error in the Reorient_Trans macro in transforms.inc
#error "error in Reorient_Trans macro: Axis1 may not be exact opposite of
Axis2"

Any ideas?

Reuben Pearse
doo### [at] breathemailnet

"Christoph Hormann" <chr### [at] gmxde> wrote in message
news:3CBFF50C.E043FCB7@gmx.de...
>
>
> Reuben Pearse wrote:
> >
> > Hi all
> >
> > I am tying to create some shapes in POVRay 3.5 (beta.RC1) using
Christoph
> > Hormann's IsoCSG Library (version 0.4) and
> > I have a couple of questions:
> >
> > 1. I want to create a rounded cylinder using the IC_Cylinder shape macro
in
> > the iso_rcsg.inc (Rounded Shapes).
> > However the cylinder I get just looks like a normal cylinder created
using
> > POV primitive. Below is the code I am using:
> >
> > [...]
>
> Calling the functions 'rounded' is a bit misleading, i will add a better
> explanation in the next version.  The shape itself is not different from
> normal iso_csg functions.
>
> But you can use the rounding properties of the functions by changing the
> threshold value, for example:
>
> #declare fn_1 = IC_Threshold( IC_Cylinder (-x, x, 0.8), 0.2)
>
> Note that the resulting shape no more has the measures given to the
> cylinder macro.
>
> >
> > How do I create a smooth rounded cone using this macro?
> > What are general principles I need to use to get round edges on a object
> > created with IsoCSG?
>
> You can use the methods mentioned above or implement the CSG constructions
> from the Round_Cone() macro in 'shapes.inc'.
>
> The same applies for all other shapes of course.  For a rounded box you
> can also use the f_rounded_box() function from functions.inc.
>
> > 2. How do you use the macros in the IsoCSG to do the equivalent of the
blob
> > threshold as detailed in the POV help section 3.6.3.5
>
> You can use the iso_csg functions like any other functions so you can also
> use them in blob constructions (instead of fn_A()/fn_B() in the cited
> example)
>
> Future versions of iso_csg will probably also implement blob functions.
>
> Christoph
>
> --
> POV-Ray tutorials, IsoWood include,
> TransSkin and more: http://www.tu-bs.de/~y0013390/
> Last updated 16 Apr. 2002 _____./\/^>_*_<^\/\.______

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