Positioning a mesh

Unity Engine
1 
using UnityEngine;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;

public class Positioner {
    public static void FixPosition (GameObject GroundObject, Vector3 rayDir, RaycastHit hit, Vector3 firstPosition, bool normalRotated = false){
        GameObject character = GameObject.Find("QualityManager");
        // Normal based rotation for tagged objects
        if (normalRotated == true){
            GroundObject.transform.position = hit.point;
            GroundObject.transform.LookAt (GroundObject.transform.position + hit.normal);
        }

        GroundObject.transform.position = firstPosition; //Move object to camera position - object keeps its scale and rotation
       
        Vector3[] meshPoints = GroundObject.GetComponent<MeshFilter>().sharedMesh.vertices; //Get verts of object mesh
        for ( int i = 0; i < meshPoints.Length; i++ ) {
            meshPoints[i] = GroundObject.transform.TransformPoint( meshPoints[i] ); //Transform verts to world space (accounting for prefab rotation and scale)
        }

    /*    List<Vector3> meshPoints = new List<Vector3>();
        GroundObject.transform.position = Camera.main.transform.position; //Move object to camera position - object keeps its scale and rotation
         //Get verts of object mesh
        foreach (Transform current in GroundObject.transform) {
            List<Vector3> meshPointsLocal = new List<Vector3>();
            meshPointsLocal.AddRange(current.GetComponent<MeshFilter>().sharedMesh.vertices);
            for ( int i = 0; i < meshPointsLocal.Count; i++ ) {
                meshPointsLocal[i] = current.transform.TransformPoint( meshPointsLocal[i] ); //Transform verts to world space (accounting for prefab rotation and scale)
            }
            meshPoints.AddRange (meshPointsLocal);
        }*/

        GroundObject.SetActive( false ); //Turn object off so it doesnt interfere with raycast
        float minDist = float.MaxValue;
        for ( int i = 0; i < meshPoints.Length; i++ ) {
            Ray pointRay = new Ray(  meshPoints[i], rayDir ); //New ray from each vert, in the direction of the screen ray
            //Debug.DrawRay( pointRay.origin, pointRay.direction * 5, Color.red, 4 );
            RaycastHit rayHit;
            if ( Physics.Raycast( pointRay, out rayHit ) ) {
                if ( rayHit.distance < minDist ) {
                    minDist = rayHit.distance; //Find nearest ray hit
                }
            }
        }
        GroundObject.SetActive( true ); //Re-enable object
        GroundObject.transform.position = GroundObject.transform.position + rayDir * minDist; //Move object to surface
    }
}

It is a great code but there is one problem: If the ray start is close to a wall and the object is big enought the positioned mesh will go throught the wall. What could be the problem?

2

Did you solved this problem?

3

I solved using LookAt!