Rigidbody collision problems

Physics
1

Hi,

I am attempting to modify the FPSWalker script, and I’ve noticed that you can get ‘stuck’ against a wall mid jump if you keep moving against it. I’m not sure why this is happening as I am constantly applying gravity to my gameObject, but it seems to be overwritten by the movement force. Does anyone have an idea how I can ensure the object falls to the ground correctly when it moves against a ‘wall’ ?

Here is the code:

var speed = 10.0;
var gravity = 10.0;
var maxVelocityChange = 10.0;
var canJump = true;
var jumpHeight = 2.0;
private var grounded = false;

@script RequireComponent(Rigidbody, BoxCollider)

function Awake ()
{
    rigidbody.freezeRotation = true;
    rigidbody.useGravity = false;
}

function FixedUpdate ()
{
    if (grounded)
    {
        // Calculate how fast we should be moving
        var targetVelocity = new Vector3(Input.GetAxis("Horizontal"), 0, Input.GetAxis("Vertical"));
        targetVelocity = transform.TransformDirection(targetVelocity);
        targetVelocity *= speed;
       
        // Apply a force that attempts to reach our target velocity
        var velocity = rigidbody.velocity;
        var velocityChange = (targetVelocity - velocity);
        velocityChange.x = Mathf.Clamp(velocityChange.x, -maxVelocityChange, maxVelocityChange);
        velocityChange.z = Mathf.Clamp(velocityChange.z, -maxVelocityChange, maxVelocityChange);
        velocityChange.y = 0;
        rigidbody.AddForce(velocityChange, ForceMode.VelocityChange);
   
        // Jump
        if (canJump  Input.GetButton("Jump"))
        {
            rigidbody.velocity = Vector3(velocity.x, CalculateJumpVerticalSpeed(), velocity.z);
        }
    }
   
    // We apply gravity manually for more tuning control
    rigidbody.AddForce(Vector3 (0, -gravity * rigidbody.mass, 0));
   
    grounded = false;
}

function OnCollisionStay ()
{
	grounded = true;
}

function CalculateJumpVerticalSpeed ()
{
    // From the jump height and gravity we deduce the upwards speed
    // for the character to reach at the apex.
    return Mathf.Sqrt(2 * jumpHeight * gravity);
}
2

It is the character controller’s skin distance I think. Try lowering it in the inspector.

3

Is there a specific reason your using a rigidbody instead of a charactercontroller? If not try using the charactercontroller instead.

4

yes, it is better effected by physics (like explosions)