Drawing curves with progressive thickness

Here I show you one more recent improvement for my vector based rendering library called Maccala.

Now it's possible to create any kind of curve with an arbitrary progressive thickness. I guess it's kind of strange I have never developed this before, but I have never needed something like this until now.

Surprisingly, it was harder to develop than I imagined initially. It was needed to redevelop my algorithm responsible for creating a thick shape based on a Math curve (conceptually a curve has no thickness at all).

In fact, in a generic algorithm, even drawing operations (in this context, "draw" means "render the contours") are tackled as filling jobs. First an assembling algorithm constructs a shape with an arbitrary thickness, so a filling algorithm can render it.

Below you can see a curve drawn with variable thickness. Now it's possible to make something like this so easily as calling a method. Unnecessary to say, the professional anti-aliased rendering is still there.

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