Question Raycast returning weird normals at corner

I've been periodically working on a sidescroller and want the player to be able to move perpendicular to the ground they're standing on. I do this using a raycast (or circlecast to be specific) but I have a problem with simple platforms.



Here, the red line is the down vector and the yellow line is the forward vector. This is how I want them to look no matter where the player is on the platform, but when you go to the corner:



It returns the normal as if the box collider had rounded edges, which I don't want it to do. However I can't find a way. The edge radius on the box colliders is already 0, and I seem to have the same problem with all the different colliders.

Is there any way I can get rid of the "invisible" rounded edges and just make this box collider act like you'd expect them to in a game like this?

 

Spherecasts have the issue that they return the normal of the collision against their spherical shape, so effectively the normal you are getting is due to the fact that the spherecast is well, checking for the collision of a sphere against that corner, which or course can have a collision normal is a large range of values depending on where exactly it hit that corner. You might have to combine this spherecast with one-or-more raycasts to get exactly precise results for situations like this.

 

I could swear I tried this before and it didn't work but sure enough yeah it's working for me now, I decided that once the spherecast hit something I would then cast a normal ray towards the point it hit and have that return the normal to me instead. Thanks for chipping in.

 

@MelvMay That's very good to know. I guess I've just noticed it more with sphere colliders due to the large surface contact area and the fact that they are much more like to pass over that corner vertex at a variety of angles.