Re: Epstopdf and Lucida fonts in labels

On Wed, 20 Apr 2005, Larry Siebenmann wrote:

> With "prologues:=2"
> as required for eps output???

I don't understand this.  I don't set prologues so that I can use TeX
fonts.  I need to do this because I use a lot of math mode in my labels.
There may be PostScript or other fonts that can be used with math mode,
but I haven't gone into this.  To the best of my knowledge, the files
output by MP when prologues is left unset (or set to 0?) is Encapsulated
PostScript.

> On the image plane it is a conic section, ie an ellipse, a
> parabola, or hyperbola.
>
> The image on the retina of the observer is an ellipse or part
> thereof.
>
> What sort of formulae do you want? Bezier or Nurbs? Implicit or
> Parametric?

Implicit and/or parametric.  The latter would probably be most useful.
I'm currently at work on polygons, i.e., plane figures made up of straight
lines.  The next steps are polyhedra and then circles and ellipses,
followed by the other conic sections.  Arbitrary curves implemented as
NURBs are rather far off, I'm afraid.  Straight lines are providing quite
enough intellectual stimulation at the moment.  However, I would like to
know about the projections of ellipses and the other conic sections, if
I'm not trying your patience too much.  The real problem is finding the
intersections in order to decompose the objects.

> With respect to which coordinate system?

That of the plane of projection.  I suppose the origin could most
conveniently be the projection of the origin in the world coordinate
system, but perhaps someone has a better suggestion.

>
>  > I haven't had any problems with labels using MP the way I do.
>
> One problem is that you are chained to dvips.

Indeed.  There are other dvi-to-something drivers, but I haven't looked
into this topic.

> Or to mptopdf.

I don't usually use PDF.  For my work, I don't see any
advantage to using it rather than PS.

> TeX label overlays let one use any TeX implementation.

I'm convinced of the usefulness of this approach.

Laurence