glyph-vector/glyph-vector-2 examples do not look at the 3rd order bezier curve bit about freetype-py HOT 12 OPEN

How do you get first point off curve for a cubic Bézier considering the explicit form? You mean given first point doesn't correspond to t=0, right?

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A while ago there was a discussion on the Opentype list about this sort of thing. It is legal for a curve to consist of entirely off-curve points. Say 4, at the corner of a square. The rasterizer interpolates them. That was the answer from Microsoft people.

So an implied on-curve point is between the first and the last.

I think it can be even more extreme - a contour can be made from 3 off-curve points. Font designers rarely do it, that's all.

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Didn't know that. Do you have a pointer to some documentation such that we can add it in the relevant example (where I'm asking to rephrase). It's not the example is not optimal but it is more a partial implementation.

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http://stackoverflow.com/questions/20733790/truetype-fonts-glyph-are-made-of-quadratic-bezier-why-do-more-than-one-consecu

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But freetype outline takes care of normalizing the output, no?
See https://www.freetype.org/freetype2/docs/glyphs/glyphs-6.html)

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Ok, no it doesn't, we have to take care of point tags.

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You do interpolate most of the time - just afaic, not the first point; and also always split a 3-order curve into two, with an interpolation in the middle. Difference small but for some glyph, might be visible.

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So we better implement the full method.

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3rd curves only on postscript fonts. 2nd order is sufficient for truetype.

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I hope this is shown side by side - left interpolated 2nd order, right true-3rd order:

and again, with the control points,, which make it clearer:

correct answer from ftgrid:

These are using MinionPro-Regular.otf from adobe acrobat reader.

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Hmm, my 'g' is a bit off in the horizonal direction for the MinionPro-Regular.otf

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These are the g's from MinionPro-Regular.otf and MinionPro-It.otf, correctly aligned in the horizontal. from
the top of #55 .

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