https://bugs.kde.org/show_bug.cgi?id=416833
Ahab Greybeard <ahab.greybe...@hotmail.co.uk> changed:
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--- Comment #1 from Ahab Greybeard <ahab.greybe...@hotmail.co.uk> ---
Created attachment 125493
--> https://bugs.kde.org/attachment.cgi?id=125493&action=edit
Fractional Pixel Positioning
The idea of fractions of a pixel is interesting and probably useful when
calculating things like Gaussian Blur and rotation transforms.
When applied to vectors projected onto a raster grid then it shows 'strange
effects'
Note that snapping to a 1 pixel grid only works if your cursor is close the the
snapping target. If not, the cursor position can return fractional pixel
coordinates from its relative screen location and these seem to be used during
vector object creation and positioning and rendering.
In the 'Fractional Pixel Positioning' attachment, the six small 1px wide vector
rectangles are all identical, made by copy/pasting the first one.
I moved them to arrange them, with grid set to 1px and grid snapping on. I
could still position them at fractional pixel positions to give different
rendered appearance.
It may be that this needs to happen as part of general vector storage and
processing since vectors have to carry exact and detailed size information.
I'll set this to CONFIRMED in case it is a UI/Usability problem and see what
the developers say.
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