How to know if a point is inside a shape

[RaNiK21]

Hi everyone,
I have to draw some circles at random places and I have to know if the center is inside a shape or not. I tried to use the interceptions function to do an even-odd algorithm (the shape is simple enough, no loop), but I don’t know how to have access to the number of intersections. It would be great if a call to interceptions return that number.
Maybe, there is another solution to my problem (besides implementing my own interception function).
Thank’s

[johannes-wolf]

There is no builtin way to do what you want. How could a possible API for this look like?
We cannot return anything from calls, so it must either create a name coordinate or use a callback (like for-each-anchor). Right now, you cannot query the number of intersections between paths – at least there is no simple API for that. You can always use get-ctx(ctx => { ... }) to query the geometry of objects and use functions from src/intersection.typ to test shapes for intersection.

[RaNiK21]

Ok, I understand the problem (I am really a new user of cetz)

Concerning a possible API (I am thinking out loud, maybe it is a terrible idea), we could have something like :
if-inside(point, path, callback-if-inside, callback-if-outside)

Anyway, thanks for the answer