Hello,
I am confused on why my IsGrounded function sometimes returns true when the player collides with a vertical wall and if there is an easy way to fix that:
private bool IsGrounded()
{
// Moves a boxcast downward to see if it collides with ground layer
return Physics2D.BoxCast(box.bounds.center, box.bounds.size, 0f, Vector2.down, 0.1f, ground);
}
It returns true then because the query you’re using is contacting the wall. It cannot be anything else.
The above just looks like examples/tutorials you see all over the place and it’s an absolute awful way of doing it but there’s nothing I can do to remove such information.
The problem being that often it’s a collider that’s dedicated for this and it’s not related to the colliders being used by the actual character. Also, you have to position the collider in a certain way at a certain location relative to the character and specify a certain distance. All this is artificial! Also, trying to read the details of an existing collider using its (approximate) bounds then pass them to a query when you can simply use the collider (abstractly) to do the cast/overlap with:
The best way though to detect if you’re touching something is to ask the physics system if there are contacts on any colliders on a Rigidbody2D or on a specific Collider2D. You can filter them by layer(s) and even the direction the contact normal is. You can see this here:
The test in the video is checking for any contact from below without a certain angle range. The check comes down to a single line of code: PhysicsExamples2D/Assets/Scripts/SceneSpecific/Miscellaneous/SimpleGroundedController.cs at d957391d0a2b70225ffdcaede90f40d679df5d1e · Unity-Technologies/PhysicsExamples2D · GitHub
You can perform checks for walls by changing the angle for instance.