Understanding Vehicle Damage script Variables?

Hello,

I need help understanding what each of the variables in this script will do, I have tested over and over and seem to get random results.

I bought this script but the seller is NO longer answering me, I need help!

I am an avid game maker, and understand a fair amount of javascript BUT I'm new to mesh manipulation.

CODE:

 #pragma strict
 var maxDamage:float=0.6;
 var maxCollPower:float=50.0;
 var destroyRange:float=0.7;
 var dirManipulator:float=0.95;
 var meshes:MeshFilter[];
 private var sqrDestRange:float;
 
 function Start(){
     sqrDestRange = destroyRange*destroyRange;// sqr of destroy range
 }
     
 function OnCollisionEnter(coll:Collision){
     if(coll.contacts.Length>0){//fix a little bug of physics in Unity
         for(var i:int=0; i<coll.contacts.Length; i++){
             var collPoint : Vector3 = coll.contacts[0].point;//contact point
             var collRelVel : Vector3 = coll.relativeVelocity;
             var collPointToMe:Vector3 = transform.position - collPoint;//convert to me
             var collPower:float = collRelVel.magnitude * Vector3.Dot(coll.contacts[0].normal, collPointToMe.normalized);//power calculate
             OnMeshForce(collPoint, Mathf.Clamp01(collPower/maxCollPower));//go next step
         }
     }
 }
 
 function OnMeshForce(originPosAndForce:Vector4){
     originPosAndForce = Vector3(originPosAndForce.x,originPosAndForce.y,originPosAndForce.z);//recalculate to Vector3
     OnMeshForce(originPosAndForce, originPosAndForce.w);//next
 }
 
 function OnMeshForce(originPos:Vector3, force:float){
     force = Mathf.Clamp01(force);
     for(var j:int=0; j<meshes.Length; j++){
         var verts:Vector3[] = meshes[j].mesh.vertices;//temp verts
         for (var i:int=0; i<verts.Length; i++){
             var scaledVert:Vector3 = Vector3.Scale(verts[i], transform.localScale );                        
             var vertWorldPos:Vector3 = meshes[j].transform.position + (meshes[j].transform.rotation * scaledVert);
             var originToMeDir:Vector3 = vertWorldPos - originPos;
             var flatVertToCenterDir:Vector3 = transform.position - vertWorldPos;
             flatVertToCenterDir.y = 0.0;
             if(originToMeDir.sqrMagnitude < sqrDestRange){
                 var dist:float = Mathf.Clamp01(originToMeDir.sqrMagnitude/sqrDestRange);
                 var moveDelta:float = force * (1.0-dist) * maxDamage;
                 var moveDir:Vector3 = Vector3.Slerp(originToMeDir, flatVertToCenterDir, dirManipulator).normalized * moveDelta;
                 verts[i] += Quaternion.Inverse(transform.rotation)*moveDir;
             }
         }
         meshes[j].mesh.vertices = verts;
         meshes[j].mesh.RecalculateBounds();
     }
 } 

Please do not steal this script, No its not copyrighted, but support the developer if you want to use it. It's a GREAT small little package thats EASY to change and add to! HERE: http://activeden.net/item/4-wheels-car-physic-damage-and-repair-system/4453624

Thank you.

Daniel