ContactFilter2D & SetNormalAngle() with Collider2D.Cast()

Questions & Answers
1

I’m performing a Collider2D.Cast() passing a ContactFilter2D parameter.

No matter what values I use in SetNormalAngle() when first initializing the ContactFilter2D, the returned RaycastHit2D does not filter any points. Is this intended? As a side note the layer mask is filtering points correctly.

//Scan for points under collider
ContactFilter2D filter = new ContactFilter2D();
filter.SetLayerMask(GroundLayers);
filter.SetNormalAngle(MinGroundAngle, MaxGroundAngle);
    
GroundPointsCount = Collider.Cast(DirectionOfGravity, filter, GroundPoints, GroundScanDistance, true);

Also, how is the normal angle of a hit calculated? Is this angle relative to the cast direction?

Thanks for any answers,
Jeff

2

I’ve been trying to figure out what I’ve been doing wrong with my own code, and I’ve noticed that no matter what numbers I set with SetNormalAngle, either it filters nothing or everything, depending on whether or not I have useOutsideNormalAngle set to true.

It definitely did not work like this a bit ago as I had some code that was working perfectly fine up until I updated, and now my collision detections that checked if I was hitting from only directly below thanks to normal angle filtering will now return true no matter what direction I hit from, or alternatively never return true no matter the angle.

I’m pretty sure it got broken in one of the patches… unless the functionality changed in some way that I need to address in my code to fix.

3

Maybe you are missing filter.useNormalAngle?