Warp <war### [at] tagpovrayorg> wrote:
>   How would you determine that a given point is, for example, on a
> polyline or inside a polygon?

Well, you know the line thickness. Just represent lines as additional
polygons then process only polygons (for example; there's bound to be a
quicker way).

>   The thing with vector graphics is that they are easy to draw as a whole:
> Just draw a line for each line in the input, fill polygons for filled
> polygons, and so on. However, if you have to determine for a random point
> what is its color, it becomes a bit more complicated.

It might not be trivial but it's hardly insurmountable. You know the
stacking order, surely it's just a matter of working down that until your
point is inside a polygon or you run out of polygons to test? It can't be
much more complicated than interpolating bitmaps.

Bill

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