create a solid from a sprite

I would like to create a sprite that walks and when it closes it creates a solid

my problem is to identify the area that closes, to then create a single sprite

You need to determine which instance will spawn the origin of the rectangle (let's say its origin is top left) and then pick the instance that represent the opposite corner, and stretch the rectangle by checking the distance between the two

Depending how you spawn those lines, you can use their IID (first instance is 0 and goes on) to determine which one was first, then IID 2 would be the opposite corner, then you proceed in two steps :

Pick instance 0 to spawn the rectangle, pick instance 2, check the distance with the spawned rectangle and change its dimensions accordingly

Is it something you want to do with the canvas plugin?

yes, such a thing would be ideal, I remember a game that thus caught insects

Mh, in that case using a sprite would be easier if the goal is to trap sprites into that area

unmmm but I still have no idea how I can do it