Annotations intersections

[Clasen00]

Hello! Could someone please share with me some advice or example about how to implement intersection cheking for two annotations? Idk is it posiblle out-of-the-box in v3 annotorious? I just found a getAnnotationsIntersecting in v2 and trying to use it in my App and it not exactly what I want :(

[rsimon]

Hi, depends on what it is you want to do. If you are trying to simply check if two annotations touch or overlap each other, that's not a function that Annotorious provides, I'm afraid. You'd need to implement your own 2 geometry intersection checking (e.g. using something like flatten.js). Any intersection methods in Annotorious are for the purpose of detecting mouse over: i.e. intersection between an annotation and a point (or bounding box).

[Clasen00]

Hi, depends on what it is you want to do.

Thank you for your answer!
My goal is to do a check is the structure superimposed on one another? And if so, how much in percent? Or just true/false
Like on this picture: green annotation is a user annotation and a blue one - it is an example to check

[Clasen00]

Hi, depends on what it is you want to do. If you are trying to simply check if two annotations touch or overlap each other, that's not a function that Annotorious provides

I made it using PNPOLY algorithm. https://wrfranklin.org/Research/Short_Notes/pnpoly.html
In short, I just cheking maxX, maxY, minX and minY coords and search if they in my new annotation. That's enough for me at the moment:)