koobas.hobune.stream
Can anybody tell me why reflections are not smoother from 2nd reflection? The first reflection is smooth but later ones aren't smooth. Please find the attached gif.
using System.Collections.Generic;
using UnityEngine;
public class ReflectingRays : MonoBehaviour
{
[SerializeField] int reflections;
bool drawRay = false;
List<Vector2> rays = new List<Vector2>();
Vector2? normal;
// Update is called once per frame
void LateUpdate()
{
if (!drawRay)
{
rays.Clear();
return;
}
if (rays.Count == 1) return;
int currentReflections = 0;
int rayIndex = 1;
while (reflections >= currentReflections && normal != null)
{
var direction = Vector2.Reflect(rays[rayIndex] - rays[rayIndex - 1], (Vector2)normal);
var hitPoint = Physics2D.Raycast(rays[rayIndex], direction);
Debug.DrawRay(rays[rayIndex], direction * 999);
if (hitPoint.collider != null)
{
currentReflections++;
normal = hitPoint.normal;
rays.Add(hitPoint.point);
}
else
{
normal = null;
}
rayIndex++;
}
drawRay = false;
}
public void DrawRay(Vector2 start, Vector2 end)
{
drawRay = true;
rays.Clear();
rays.Add(start);
var rayCastHit = Physics2D.Raycast(start, (end - start));
Debug.DrawRay(start, (end - start) * 999);
if (rayCastHit.collider != null)
{
normal = rayCastHit.normal;
rays.Add(rayCastHit.point);
}
else
{
normal = null;
}
}
}
So this is a guess but I think your raycasts might be originating just inside the collider you've just hit. You could test this theory pretty easily by changing line 30 to:
var hitPoint = Physics2D.Raycast(rays[rayIndex] + (direction.normalized * 0.01f), direction);
That adds a tiny movement in the decided direction, hopefully just enough to move 'outside' of the current collider.
If that works but you don't like the solution you could look into using a (dynamic?) layer mask instead
