[Chart] Bezier smoothing

[Kai Zhang]

I have a question: why not deprecate Graphics.Rendering.Chart.Geometry and
Graphics.Rendering.Chart.Drawing, and simply use the API of Diagram. Then
we would have all the nice features of Diagram. It seems to me that some
codes in Chart are doing the same thing as that in Diagram. I may be wrong.


On Mon, Apr 7, 2014 at 3:51 PM, Tim Docker <tim at dockerz.net> wrote:

> That makes sense - I'd still follow the steps below but add;
>
> 4) add a library function to construct a path of bezier segments given the
> open/closed spline. This could either call Diagrams.CubicSpline directly,
> or it might be preferable to take a copy of the algorithm, to avoid having
> the chart library core depend on diagrams and all its deps.
>
> Tim
> On 8 Apr 2014 02:07, "Sacha Sokoloski" <sacha404 at gmail.com> wrote:
>
>> So as I found out, there's a difference between being able to draw a
>> bezier curve, and being able to calculate/interpolate a bezier spline.
>> Diagrams exposes an algorithm for calculating the spline here:
>>
>> http://hackage.haskell.org/package/diagrams-lib-1.1.0.4/
>> docs/Diagrams-CubicSpline.html
>>
>> It probably wouldn't be too hard to get it working, but for some reason
>> I'm hoping someone else will do it. At some point I'll probably get around
>> to implementing a solution myself, but my current work doesn't involve
>> contour plots, so it's not a priority for me.
>>
>> On 05/04/14 01:00 PM, chart-request at projects.haskell.org wrote:
>>
>>> Hi.
>>>
>>> For this I think you would need to:
>>>
>>> 1) extend the abstract back end to support a bezier segment in paths
>>>
>>> 2) implement this in both the Cairo and diagrams renderers - with some
>>> tests
>>>
>>> 3) make use of the bezier segments in your new contour plots.
>>>
>>> However - looking back to the thread where you raised this before, it
>>> sounded like the Cairo beziers didnt meet your needs. Did you resolve
>>> this?
>>>
>>
>>
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>
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