[solved] How do I draw lines of the planetary orbits (ellipse)?

Basically, draw the white lines of this image.

Using an image and scaling it is very bad, because the lines change in size.

I try use canvas, but I don't know how to make a line like an ellipse.

drive.google.com/open

Thanks in advance

are you trying to create or modify an image dynamically?

Here you go:

dropbox.com/s/3mcd9fcel5paf78/EllipseDemo.capx

I derived the formula from this post:

math.stackexchange.com/questions/432902/how-to-get-the-radius-of-an-ellipse-at-a-specific-angle-by-knowing-its-semi-majo

You can use canvas plugin to draw the ellipse, but it doesn't have "Draw ellipse" action. You can either draw a path or lots of dots or small rectangles. It will still be better for performance rather than creating thousands of dot sprites.

dop2000

Thanks for your help.

I had not thought that if I have 1 point, I also have the angle.

I upload a version with the ellipse made by canvas (line to line)

drive.google.com/open