Why does GraphicsContext use double parameter methods?
I am going from swing to jawafx. I was wondering why GraphicsContext uses double parameter methods. For example fillRect(double x, double y, double w, double h)
, unlike swing, it has methods drawRect(int x, int y, int width, int height)
.
Should I do all my calculations in double?
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drawRect
in inherited from Graphics
, which is used int
to specify coordinates and size.
An object Graphics2D
, on the other hand, is capable of handling graphics values that lie "between whole pixels". To compensate for this, there will usually be a fading pixel (partly between the drawing and BG color) in the parts of the render where it has to deal with pixel fractions.
Should I do all my calculations in double?
Yes! Double values that are exactly an integer will display exactly as you would expect from a method Graphics
- with crisp, clean lines. But if the shape's border ever falls between whole pixels, the color will fade out.
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