custom rigidbody movement problem

Questions & Answers
1

hi, im using a custom rigidbody movement script, and it works fine, it moves well and interacts with physics perfectly, but one problem, i can climb up walls witch i dont want, how do i fix that? this is the script, it in javascript:

 var forwardSpeed = 10; 

 var backwardSpeed = 5; 

 var strafeSpeed = 8; 

 

 function FixedUpdate () { 

    // Step1: Get your input values 

    horizontal = Input.GetAxis("Horizontal"); 

    vertical = Input.GetAxis("Vertical"); 

    // Step 2: Limit the movement on angles and then multiply those results 

    // by their appropriate speed variables 

    percentofpercent = Mathf.Abs(horizontal) + Mathf.Abs(vertical) - 1.0; 

    if (percentofpercent > 0.1) { 

       // if we're here, then we're not moving in a straight line 

       // my math here might be kinda confusing and sloppy...so don't look! 

       percentofpercent = percentofpercent * 10000; 

       percentofpercent = Mathf.Sqrt(percentofpercent); 

       percentofpercent = percentofpercent / 100; 

       finalMultiplier = percentofpercent * .25; 

       horizontal = horizontal - (horizontal * finalMultiplier); 

       vertical = vertical - (vertical * finalMultiplier); 

    } 

    if (vertical > 0) { 

       vertical = vertical * forwardSpeed; 

    } 

    if (vertical < 0) { 

       vertical = vertical * backwardSpeed; 

    } 

    horizontal = horizontal * strafeSpeed; 

    // Step 3: Derive a vector on which to travel, based on the combined 

    // influence of BOTH axes 

    tubeFinalVector = transform.TransformDirection (Vector3(horizontal,0,vertical)); 

    // Step 4: Apply the final movement in world space 

    rigidbody.velocity.z = tubeFinalVector.z; 

    rigidbody.velocity.x = tubeFinalVector.x; 

 } 

 function Awake () { 

    rigidbody.freezeRotation = true; 

 }
2

A good working example of this climbing limitation you describe can be found in the default assets of Unity3d, in the basic character controller there is a so called slopeLimit parameter this is based on steepness angle. So you can have the script decide what angle your rigidbody can ascend prehaps in the case of a wall accept every slope under 90 degrees.

3

declarations:

var ticktock:boolean;
var prevPos;
var pmd;

place in update

if (!ticktock)
{
    prevPos = Vector2(transform.position.x,transform.position.z);
    ticktock = true;
}
else
{
    pmd = Vector2.Angle(prevPos,vector2(transform.position.x,transform.position.z));
    ticktock = false;
}
if (pmd != null && Raycast (transform.position, Vector3(pmd.x,,pmd., 115, 0))
{
        rigidbody.velocity.z = 0; 

rigidbody.velocity.x = 0; 
}