markers module: angle arc ignores IgnoreAspect

[sanjoymahajan]

I've just noticed (using asy 3.01 on Debian) that the arc to mark an angle doesn't account for IgnoreAspect in the size() setting. A minimal example:

import markers;
size(400,100,IgnoreAspect);
draw(E -- (0,0) -- (1,1));
markangle(E, (0,0), (1,1), dashed);

The angle's jaw is conceptually 45 degrees and, with the squat 4:1 aspect ratio, is correctly drawn at about 15 degrees (arctan 0.25). However, the arc marking the angle doesn't squash to match the drawn angle, and is drawn (incorrectly) as if the angle were 45 degrees.

I think that this behavior is new (with v3.01, maybe). I don't have an older version handy to test this guess, but I could compile and install one if it would be helpful for debugging.

[johncbowman]

This behaviour of Philippe Ivaldi's markangle routine isn't new (for example, Asymptote 2.30 exhibits the same behaviour).

[sanjoymahajan]

Sorry for the noise, good to know. I must have never used that combination of markangle with IgnoreAspect in any of my many asymptote figures. There is probably no easy solution (other than not to use IgnoreAspect), because the markangle routine doesn't yet know the final transform.