How can I create a circular hitbox?

Need a circular hitbox for my game

While it is theoretically possible, it would require so many points that it would take a long time. Your best bet is to make an octagon or something similar You can also try using Guess Polygon Shape on a circle for pretty accurate results. If you are using the physics behavior, just go to the dropdown for shape and pick Circle.

I agree it would be tedious to make the collision shape manually and it would be hard to get it to be smooth.

But you can use mesh distort to make any shape you want. For example this takes a square sprite and makes it into a circle. Even with just 20 points it's decently smooth. Typically you'd make that invisible and put the sprite you want for a visual on top.

dropbox.com/s/rxruw0ke7ox9uo5/collision_shape.c3p

The second part of that example loads the outline of a mario sprite.

You can use this tool to create the point list.

dropbox.com/s/ldpsgtgzxwuajfc/marchingSquares2.c3p

What do you need it for? A circular hitbox can effectively just be a simple distance comparison from a point.