clipka <ano### [at] anonymousorg> wrote:
> PeYo56 -- MmTr1x3 schrieb:
> > For a svg plugin, it not will just work for HF but for texturing or other stuff,
> > because the advantage of texturing with povray is for the infinite resolution,
> > not like basic image as the games we can play, the advantage of image is to
> > create as we want.
> >
> > I think that we can create a plugin for add svg when we can use bmp or png, for
> > texturing, HF, bumpmap, texturemap (it will increase the experience)
> >
>
>
> Note that SVG is fundamentally different from bitmap images, which may
> make it significantly more difficult to handle in POV-Ray, and
> eventually have the whole "infinite resolution" advantage break down.
>
> POV-Ray needs to look up texture values on a point-by-point basis; in
> bitmap textures, this is straightforward: Evaluate the 4 closest pixels,
> and interpolate between them (for bilinear interpolation; or a few more
> points for bicubic interpolation).
>
> For function textures, it is straightforward as well: Just evaluate the
> function for the given coordinates; the same principle applies to
> pattern textures.
>
> For SVG, you have two major options: (a) basically evaluate the whole
> SVG over and over again for *every* point to be looked up; the required
> algorithmical and computational effort might be close to that of a
> moderately simple raytracing engine; or (b) evaluate the SVG once,
> somehow caching the data in a lookup structure of inherently limited
> resolution; this of course would forfeit the main benefit of SVG.


It seems like some aspect of this is present and addressed in the object
pattern, since the object also has arbitrary resolution.

I also seem to remember a discussion about using the svg format to allow users
to define a spline, which it seems like another good use for svg.

-Reactor

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