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Antialiasing?

Questions on using, creating, or understanding data in Fund Manager graphs.

Postby Djobydjoba » Sat Nov 11, 2017 7:24 am

Hi Mark,

I was wondering if antialiasing, for the rendering of the graphical objects, could be feasible with the graphical engine of Fund Manager?
I saw the adoption of antialiasing in some softwares and it often brings a nice touch.
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Postby Mark » Sat Nov 11, 2017 12:21 pm

Hi Djobydjoba,

Our "graphical engine" is custom built. There may be techniques that could be added. We would have to research how to implement something like that.
Thanks,
Mark
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Postby Djobydjoba » Sat Nov 11, 2017 1:02 pm

Hi Mark,

I thought that standard graphical objects / libraries were used, so the "graphical engine".

Just to be less cryptic, a nice page on aliasing / anti-aliasing:
http://spsprashanth.blogspot.com/2016/0 ... asing.html
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Postby Djobydjoba » Sun Nov 12, 2017 9:11 am

Now, I know why I've opened this topic :lol:

In fact, sometimes the aliasing is almost indiscernible in FM, sometimes is it quite important. In the screenshot under, the aliasing for the three trendlines is different:
https://img4.hostingpics.net/pics/70341 ... 6h4101.png

TL1 has less aliasing (as the moving averages), TL3 the most (TL2 between the two). TL1 has a better look than TL3! The aliasing is related to the number (or lenght) of micro-segments used to draw the lines, why such a difference between the trendlines? Is it related to their slope? (auto-answer: yes)

Here's another screenshot where the aliasing of the trendlines is important (the 1, 2 and 3 in particular). Again, the difference of aliasing between lines is surprising, no aliasing with trendline 4 and MAs (look better!)
https://img4.hostingpics.net/pics/35222 ... 6h5501.png
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Postby Mark » Mon Nov 13, 2017 8:54 am

Hi Djobydjoba,

Thanks, yes, I can see your points. It is quite noticeable in some cases.
Thanks,
Mark
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Mark
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Postby Djobydjoba » Mon Nov 13, 2017 12:16 pm

To complete:

By rotating a trendline from one of its endpoints, we can see the changes on the aliasing for each angle. The best aspect for a trendling seems to be with a 45° slope (or even better, 0° or 90° :lol: )

But when the slope in near 0° or 90°, but not exactly these values, the broken line effect is not very nice... Often, I try to adjust the line precisely to have a perfect flat line, it is nicer. But counterproductive.
https://img4.hostingpics.net/pics/47554 ... 0h0201.png

I really like the graphs in Fund Manager and I am accustomed to this behavior. I can imagine very well this is how the line is calculated and drawn, so difficult to change. But anyway, it had to be said :).
Djobydjoba
 
Posts: 711
Joined: Tue Mar 09, 2010 9:39 am

Postby Mark » Mon Nov 13, 2017 1:48 pm

Hi Djobydjoba,

As you can probably tell FM is currently just drawing a straight line from end point to end point. I do get your point on anti-aliasing.
Thanks,
Mark
Fund Manager - Portfolio Management Software
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