I have a code where im creating a convex hull but instantiating a gameobject (has mesh renderer, mesh filter, and mesh collider components) for each different face/triangle in my convex because I need each to be a different color, I then want to move raycast based on keyboard click (the raycast goes through a list of points that i want to hit, the center of the raycast is the centroid of my convex hull and the direction is based on each point I go through in that list).
My raycast never detects mesh colliders! it detects spheres but never meshes, tried many solutions such as drawing the raycast on FixedUpdate rather that on Update, also tried putting both codes in the same script as well as making all triangles in the same object (thought it might be a problem with detecting non-convex) but nothing worked. I even tried making a new layer that is not ignored by raycast and still nothing.
My convex creating code:
void CreateMyMesh()
{
for (int i = 0; i < faces.Count; i++)
{
if (faces[i].points.Count == 3)
{
Vector3 DirectionnnOFTRI = Vector3.Cross(faces[i].points[1] - faces[i].points[0], faces[i].points[2] - faces[i].points[0]).normalized;
Vector3 CentroidTRI = new Vector3((faces[i].points[0].x + faces[i].points[1].x + faces[i].points[2].x) / 3
, (faces[i].points[0].y + faces[i].points[1].y + faces[i].points[2].y) / 3
, (faces[i].points[0].z + faces[i].points[1].z + faces[i].points[2].z) / 3);
float Sign = Vector3.Dot(DirectionnnOFTRI, centroid - CentroidTRI);
if (Sign > 0)
{
for (int j = 2; j >= 0; j--)
{
Vector3 v = new Vector3(faces[i].points[j].x, faces[i].points[j].y, faces[i].points[j].z);
int iWhich = isExist(v, tmpVec);
if (iWhich == -1)
{
tmpVec.Add(v);
tmpTriangles.Add(tmpVec.Count - 1);
}
else
{
tmpTriangles.Add(iWhich);
}
}
}
else
{
for (int j = 0; j < 3; j++)
{
Vector3 v = new Vector3(faces[i].points[j].x, faces[i].points[j].y, faces[i].points[j].z);
int iWhich = isExist(v, tmpVec);
if (iWhich == -1)
{
tmpVec.Add(v);
tmpTriangles.Add(tmpVec.Count - 1);
}
else
{
tmpTriangles.Add(iWhich);
}
}
}
}
else
{
print("Error : #of points in Face != 3");
}
GameObject newMeshObject = Instantiate(MeshObject, MeshObject.transform.position, Quaternion.identity);
newMeshObject.name = "triangle number " + i;
Mesh mesh = new Mesh();
newMeshObject.GetComponent<MeshRenderer>().material.color = new Color(tmpVec[0].x, tmpVec[0].y, tmpVec[0].z, 1f);
newMeshObject.GetComponent<MeshFilter>().mesh = mesh;
newMeshObject.GetComponent<MeshCollider>().sharedMesh = mesh;
mesh.Clear();
mesh.vertices = tmpVec.ToArray();
mesh.triangles = tmpTriangles.ToArray();
mesh.RecalculateNormals();
mesh.name = "triangle mesh number " + i;
tmpVec.Clear();
tmpTriangles.Clear();
}
My raycast code:
int ct = 0;
public void Raycasttt()
{
if(Input.GetKeyDown(KeyCode.UpArrow))
{
if(ct<rayyy.Count-1)
{
ct++;
}
else
{
ct=0;
}
}
Debug.DrawRay(transform.position, (rayyy[ct]) * 10, Color.yellow);
RaycastHit hit;
Vector3 Direc = ((rayyy[ct] * 10) - transform.position ).normalized;
if(Physics.Raycast(transform.position, Direc, out hit, Mathf.Infinity, 6))
{
Debug.Log("in raycast");
if (hit.collider != null)
{
Debug.DrawRay(transform.position, (rayyy[ct]) * 10 * hit.distance, Color.yellow);
Debug.Log("Did Hit");
Debug.Log("HitPosition = " + hit.collider.gameObject.transform.position);
}
Debug.Log(hit.collider.gameObject.name);
}
}
My mesh object that I instantiate:
