Hello Unity!
I have a problem with laser beam (LineRenderer) it’s not following the ray direction. if the line renderer is hitting an object it will reflect and follow the ray but if there is not object the lineRenderer will not follow the ray.
how can i fix this issue below will be the code that i am just attaching to LineRenderer object.
and here is the short 1 that shows how it’s behaving with script attached to lineRenderer object
using UnityEngine;
using System.Collections;
public class Reflection : MonoBehaviour
{
//this game object's Transform
private Transform goTransform;
//the attached line renderer
private LineRenderer lineRenderer;
//a ray
private Ray ray;
//a RaycastHit variable, to gather informartion about the ray's collision
private RaycastHit hit;
//reflection direction
private Vector3 inDirection;
//the number of reflections
public int nReflections = 2;
//the number of points at the line renderer
private int nPoints;
void Awake ()
{
//get the attached Transform component
goTransform =GetComponent<Transform>();
//get the attached LineRenderer component
lineRenderer =GetComponent<LineRenderer>();
}
void Update ()
{
//clamp the number of reflections between 1 and int capacity
nReflections = Mathf.Clamp(nReflections,1,nReflections);
//cast a new ray forward, from the current attached game object position
ray = new Ray(goTransform.position,goTransform.forward);
//represent the ray using a line that can only be viewed at the scene tab
Debug.DrawRay(goTransform.position,goTransform.forward * 100, Color.magenta);
//set the number of points to be the same as the number of reflections
nPoints = nReflections;
//make the lineRenderer have nPoints
lineRenderer.SetVertexCount(nPoints);
//Set the first point of the line at the current attached game object position
lineRenderer.SetPosition(0,goTransform.position);
for(int i=0;i<=nReflections;i++)
{
//If the ray hasn't reflected yet
if(i==0)
{
//Check if the ray has hit something
if(Physics.Raycast(ray.origin,ray.direction, out hit, 1000))//cast the ray 100 units at the specified direction
{
//the reflection direction is the reflection of the current ray direction flipped at the hit normal
inDirection = Vector3.Reflect(ray.direction,hit.normal);
//cast the reflected ray, using the hit point as the origin and the reflected direction as the direction
ray = new Ray(hit.point,inDirection);
//Draw the normal - can only be seen at the Scene tab, for debugging purposes
Debug.DrawRay(hit.point, hit.normal*3, Color.blue);
//represent the ray using a line that can only be viewed at the scene tab
Debug.DrawRay(hit.point, inDirection*100, Color.magenta);
//Print the name of the object the cast ray has hit, at the console
Debug.Log("Object name: " + hit.transform.name);
//if the number of reflections is set to 1
if(nReflections==1)
{
//add a new vertex to the line renderer
lineRenderer.SetVertexCount(++nPoints);
}
//set the position of the next vertex at the line renderer to be the same as the hit point
lineRenderer.SetPosition(i+1,hit.point);
}
}
else // the ray has reflected at least once
{
//Check if the ray has hit something
if(Physics.Raycast(ray.origin,ray.direction, out hit, 1000))//cast the ray 100 units at the specified direction
{
//the refletion direction is the reflection of the ray's direction at the hit normal
inDirection = Vector3.Reflect(ray.direction,hit.normal);
//cast the reflected ray, using the hit point as the origin and the reflected direction as the direction
ray = new Ray(hit.point,inDirection);
//Draw the normal - can only be seen at the Scene tab, for debugging purposes
Debug.DrawRay(hit.point, hit.normal*3, Color.blue);
//represent the ray using a line that can only be viewed at the scene tab
Debug.DrawRay(hit.point, inDirection*100, Color.magenta);
//Print the name of the object the cast ray has hit, at the console
Debug.Log("Object name: " + hit.transform.name);
//add a new vertex to the line renderer
lineRenderer.SetVertexCount(++nPoints);
//set the position of the next vertex at the line renderer to be the same as the hit point
lineRenderer.SetPosition(i+1,hit.point);
}
}
}
}
}
Here are some Photos as well that show the problem
thanks in advance for help!!!