Bullet RigidBody Collider

Questions & Answers
1

Hello, I can see that the Refresh for my bullet isn’t fast enough.

Here is my code on my HotKey Detector:

#pragma strict
var projectile: Rigidbody;
var box : Rigidbody;
var crosshairTexture : Texture2D;
var position : Rect;
function Start()

{	
	position = Rect( ( Screen.width - crosshairTexture.width ) / 2, ( Screen.height -
	crosshairTexture.height ) / 2, crosshairTexture.width, crosshairTexture.height );
}

function OnGUI()
{
GUI.DrawTexture( position, crosshairTexture );
}

function Update () {
	if( Input.GetButtonDown( "Fire1" ) )
	{
		var instantiatedProjectile : Rigidbody = Instantiate(projectile, transform.position, transform.rotation );
		Debug.Log("Shot");
	}
	if(Input.GetKeyDown(KeyCode.Z))
	{
		var box : Rigidbody = Instantiate(box, transform.position, transform.rotation );

	}
	if(Input.GetButtonDown("Fire2"))
	{
		var ray: Ray = Camera.main.ScreenPointToRay(Input.mousePosition);
		var hit: RaycastHit;
		// do a infinite Raycast from the camera
		if (Physics.Raycast(ray, hit)) print("Hit something at "+hit.distance+" meters");
		// do a Raycast up to 50 meters from the starting point
		if (Physics.Raycast(ray, hit, 50)) print("Hit "+hit.transform.name);
	}
	
	if(Input.GetKeyDown(KeyCode.LeftAlt))
	{
		print(Camera.main.fieldOfView);
		if(Camera.main.fieldOfView == 10f) 
		{
			Camera.main.fieldOfView = 60f;
		}else{
			Camera.main.fieldOfView = 10f;
		}
	}
}

Now, my code for the bullet(The collision Detector):

#pragma strict 
 
var layerMask : LayerMask; //make sure we aren't in this layer 
var skinWidth : float = 0.1; //probably doesn't need to be changed 
private var minimumExtent : float; 
private var partialExtent : float; 
private var sqrMinimumExtent : float; 
private var previousPosition : Vector3; 
private var myRigidbody : Rigidbody;
var hit : boolean = false;
 
 
//initialize values 
function Awake() { 
   myRigidbody = rigidbody; 
   previousPosition = myRigidbody.position; 
   minimumExtent = Mathf.Min(Mathf.Min(collider.bounds.extents.x, collider.bounds.extents.y), collider.bounds.extents.z); 
   partialExtent = minimumExtent*(1.0 - skinWidth); 
   sqrMinimumExtent = minimumExtent*minimumExtent; 
} 
 
function FixedUpdate() {
        if(!hit){
           //have we moved more than our minimum extent? 
                var movementThisStep : Vector3 = myRigidbody.position - previousPosition; 
                var movementSqrMagnitude : float = movementThisStep.sqrMagnitude;
                if (movementSqrMagnitude > sqrMinimumExtent) { 
                        var movementMagnitude : float = Mathf.Sqrt(movementSqrMagnitude);
                        var hitInfo : RaycastHit; 
                        //check for obstructions we might have missed 
                        if (Physics.Raycast(previousPosition, movementThisStep, hitInfo, movementMagnitude, layerMask.value)) 
                        myRigidbody.position = hitInfo.point - (movementThisStep/movementMagnitude)*partialExtent;
                        enabled = false;        
                } 
           previousPosition = myRigidbody.position;
        }
}

And the Bullet Force:

//Add this script to rigidbody GO, which will be your bullet/tracer. 
        var damage : int = 10;
        var bulletSpeed : float = 1000;
		var destroyAfter : float;
        
        function Start(){
                rigidbody.AddRelativeForce(new Vector3(0,0,bulletSpeed), ForceMode.Impulse);
                //If you don't hit, destroy bullet after 3 seconds
                //Destroy(gameObject, destroyAfter);
        }
        
        function OnCollisionEnter(col : Collision){
		Debug.Log("Hit");
                col.gameObject.SendMessageUpwards("ApplyDamage", damage, SendMessageOptions.DontRequireReceiver);
                Destroy(gameObject, 3);
        }

The only problem now is that the collisions are not detected on medium-small objects like thin walls, or boxes, or AIs.

Anyone knows how to fix it?

2

Your bulletspeed is too high and the collider is probably too small that the engine can detect the collision. What you can do is to also use raycasts. Here is something from the wiki that may interest you: unifycommunity.com.

Hope this helps.

3

I simply put the collision detection mode to Continuous Dynamic and it works