How do I get Raycasts to cast symmetrically?

Questions & Answers
1

I have an even distribution of points on the surface of a sphere and a list of Vectors for raycasting from the center, however when I try doing all of the casts the directions seem to be in a 270 degree cone in the direction the original (now stationary) object was moving that I am performing the casts from.
Does anyone know why this warp is happening and how to avoid it?

Vector3 explosionPosition = transform.position;
List<Vector3> points = new List<Vector3>(BlockIndex.SphereSurfacePoints(radius + 2));
float rayDamage = damage * 0.0027777777777778f;
float thisRay = rayDamage;
RaycastHit[] hits;
float fade = 1 / radius * rayDamage;
float forcefade = 1 / radius * explosionForce;
SortHits sorter = new SortHits();
rigidbody.isKinematic = true;
collider.enabled = false;
int i = 0;
for (int x = 0; x < points.Count; x++)
{
  // reset vars befor raycast
  thisRay = rayDamage;
  i = 0;
  //cast a ray for the current point
  hits = Physics.RaycastAll(explosionPosition, points[x], radius);
  if (hits != null && hits.Length > 0)
  {
    foreach (RaycastHit hit in hits)
    {
      if (thisRay > 0)
      {
        DestructableObject dObject = hit.collider.GetComponent<DestructableObject>();
        if (dObject != null)
        {
          float currdamage = dObject._currentHP;
          dObject.ApplyRayDamage(thisRay);
          thisRay -= currdamage;
        }
        if (hit.collider.rigidbody)
          hit.collider.rigidbody.AddExplosionForce(
                                   forcefade,
                                   explosionPosition,
                                   radius,
                                   0);
      }
      if (thisRay > 0)
        thisRay -= fade;
      else
        i = hits.Length;
    }
  }
}
return;

SphereSurfacePoints is the precomputed list of Vector3 coordinates. To debug I tried instantiating cube primitives at each of the points and it makes a perfect sphere.

This is the function that returns the array:

        public static Vector3[] UniformPointsOnSphere(float numberOfPoints)
        {
            List<Vector3> points = new List<Vector3>();
            float i = Mathf.PI * (3 - Mathf.Sqrt(5));
            float offset = 2 / numberOfPoints;
            float halfOffset = 0.5f * offset;
            float y = 0;
            float r = 0;
            float phi = 0;
            int currPoint = 0;
            for (; currPoint < numberOfPoints; currPoint++)
            {
                y = currPoint * offset - 1 + halfOffset;
                r = Mathf.Sqrt(1 - y * y);
                phi = currPoint * i;
                Vector3 point = new Vector3(Mathf.Cos(phi) * r, y, Mathf.Sin(phi) * r);
                if (!points.Contains(point)) points.Add(point);
            }
            return points.ToArray();
        }
2

I don’t see enough of your code to be sure, but the most likely issue is how you are passing your ‘points’ to the RaycastAll(). The second Vector3 parameter is a direction and is relative to the start point. You write, “SphereSurfacePoints is the precomputed list of Vector3 coordinates,” which leads me to believe they are world space coordinates.

If so you may want this instead:

hits = Physics.RaycastAll(explosionPosition, points[x] - explosionPosition, radius);