I am trying to get a perpendicular line to the surface of an object the character collides with, however it looks like the collision normal is relative to the origin (always within 1 unit of the origin) so I cannot draw a line from collision point to the normal and expect a perpendicular line to the collision surface. Is that a normal behavior (no pun intended)?
I was able to get a perpendicular line to the surface of the object by adding the position of the object to the normal to get a “corrected” normal value and then draw the line from object’s origin to the new normal vector. I have a feeling that this isn’t a correct approach. Thoughts?
Blue lines are generated with the code below while the red line is a raycast from the collision point directly to the original normal.
Blue Lines
void OnControllerColliderHit(ControllerColliderHit hit)
{
var point = hit.point;
var dir = -hit.normal;
// step back a bit
point -= dir;
RaycastHit hitInfo;
// cast a ray twice as far as your step back. This seems to work in all
// situations, at least when speeds are not ridiculously big
if (hit.collider.Raycast(new Ray(point, dir), out hitInfo, 2))
{
var normal = hitInfo.normal;
Debug.DrawLine(hit.transform.position, hit.transform.position + hitInfo.normal, Color.blue, 100f);
}
}
Red Line
Debug.DrawLine(forwardHitInfoTop.point, forwardHitInfoTop.normal, Color.red);