Wether gravity or collision is working, but not both

Unity Engine
,
1

Hi together,

I have a problem with the collision for my enemies. I already tried RigidBody and CharacterController, but nothing works.

With Rigidbody the enemies move correct but glitch into each (no collision) For rigidbody i set “Use gravity = true” and freeze postion + rotation complitely (but shouldn´t have anything todo with the collision), so gravity works, bot collision doesn´t:
6379164--710559--upload_2020-10-3_20-18-44.png
No collision, so they glitch into each other

  // If the target is in pull distance and the mob doesn´t walk back to the start point
if (distanceToPlayer <= PullDistance && !_turn && !_playerCharacter.IsDead)
{
    _animation.Play(GlobalConstants.Walk);

    _turn = false;

   // Rotate/look to the target
   Vector3 direction = _target.position - _mob.position;
   direction.y = 0;          
    _rigidbody.MoveRotation(Quaternion.Slerp(_mob.rotation, Quaternion.LookRotation(direction), RotationSpeed * Time.deltaTime));

    if (distanceToPlayer > MinDistanceToPlayer)
    {
        // Move to the target
        _rigidbody.MovePosition(_mob.forward * MovementSpeed);
    }
}

If i use a CharacterController, the collision works, but it looks like the gravity doesn´t work. As soon as they turn to the player, the their position moves on the y axe (so they “fly”) and if they collide with another enemy or the player, they “jump” over it (values of the character controller are all default):
6379164--710535--upload_2020-10-3_20-12-34.png
(The left spider is 0.8f over the ground and the right spider “jumps” over the player cause of collision), so i guess, the gravity doesn´t work. I actually thought with SimpleMove cares on gravity ?!

  // If the target is in pull distance and the mob doesn´t walk back to the start point
if (distanceToPlayer <= PullDistance && !_turn && !_playerCharacter.IsDead)
{
    _animation.Play(GlobalConstants.Walk);

    _turn = false;

    // Rotate/look to the target
    Vector3 direction = _target.position - _mob.position;
    direction.y = 0;
    _mob.rotation = Quaternion.Slerp(_mob.rotation, Quaternion.LookRotation(direction), RotationSpeed * Time.deltaTime);
           
    if (distanceToPlayer > MinDistanceToPlayer)
    {            
        // Move to the target
        _cC.SimpleMove(_mob.forward * MovementSpeed);            
     }
}

Do i have to set anything else ? Does my terrain needs anything special or do i have something in the code ?
I know that´s actually very basic, but i really don´t get it. I already wasted a lot of hours for this with google and trying different things and coulnd´t get any result…

*To be clear, i just want that the enemies don´t glitch into each other, but don´t jump away or anything if they collide.

Kind regards,
Sphinks

6379164--710535--upload_2020-10-3_20-12-34.png

2

Has no1 an idea how i can fix that ? As far as i know should rigidbody actually handle collisions and CharacterController.SimpleMove should handle gravity ?!
It´s not important for me if i use a rigidbody or CharacterController, i just want it to work.
So please, if any1 knows what the problem is with the missing collision on rigidbody or the “jumping” by using CharacterController let me know.

3

Did you add colliders to your objects?
For collisions to work both object must have a collider and at least one a rigidbody.

According to the documentation, it seems like SimpleMove does indeed apply gravity: Unity - Scripting API: CharacterController.SimpleMove
Maybe you need to increase gravity? Cant really help with that, as i normally prefer to handle my own velocity vector.

4

Thanks for your reply.
Yes, both have colliders and the enemies (spiders) have a Rigidbody. I already tried to increase the gravity, but they still ran over other colliders. I will have another try tomorrow, if it doesn´t work, i maybe try to handle the velocity by my own too.