如何使用 JavaFX 8 在画布上有效地绘制箭头？

Question

I am looking for a very simple and efficient way to draw arrows in JavaFX 8, what is the best way to achieve that (performance-wise if let's say I'm willing to draw hundreds or thousands of them)?

I've heard using a Canvas to draw on it is quite efficient.

However, I do not know whether the best implementation is to go with:

• Inheriting from the class Shape [ https://docs.oracle.com/javase/8/javafx/api/javafx/scene/shape/Shape.html]
• Inheriting from the class Line? [ https://docs.oracle.com/javase/8/javafx/api/javafx/scene/shape/Line.html]
• Bothering myself every now and then with the GraphicContext class in order to create the arrow manually? Does not sound like the good idea.
• Other strategy?

Answer 1

The best method depends on various factors which we don't know so it's difficult to give a clear answer here. I will try to give a few general hints though and you will have to decide yourself if these are applicable to your problem.

For mass drawings using the canvas sounds like a good idea.

Simple lines and rectangles are much faster than paths (also polylines and polygons).

Some line joins/caps are faster than others.

Avoid transparency.

It may be helpfull to consider specialized approaches like, eg creating images of your arrows and then just painting these images.

Michael