Re: [Lib2geom-devel] Path translations

[Krzysztof K. <twe...@gm...>]

2013/11/12 Johan Engelen <jbc...@sw...>:
> As far as I can see now, all (current) Curve types *are* closed under
> translations. I think we should enforce this for Curve. I.e., each Curve
> must implement
>         virtual Curve &operator+=(Point const &);

I think the method should be:
virtual Curve &operator*=(Translate const &t) {
    *this *= Affine(t);
    return *this;
}

Rationale:
1. It's not immediately obvious what adding a point to a curve means.
For instance, for BezierCurve it might plausibly mean adding a control
point.
2. For curves that don't implement the specialization, we just
multiply by a generic affine.

Regards, Krzysztof