Raycasting between objects. What am I doing wrong?

Hi people. I have a problem that probably is solved easily, but several hours ago that I can not solve. I need to raycast from the camera to a Vector3 (not the cursor position, just a vector3 in the space).

This point in space is just the direction that I want to direct the ray, but I need to know if in that direction, before or after this direction point, the ray collides with any object.

This is the code I'm using, and does not work sp2 is the direction point

RaycastHit pHit;

if (Physics.Raycast (currentCamera.transform.position, sp2, out pHit, Mathf.Infinity)) {
Debug.DrawLine (currentCamera.transform.position, sp2, Color.red);
}
else
{
Debug.DrawLine (currentCamera.transform.position, sp2, Color.white);
}

 

I researched and found that linecast solves half the problem. I can find objects between the camera and sp2, but I can not find the ones that are beyond sp2.

any ideas?

 

I would raycast from the SP2, the opposite direction of the camera.
Or you could check if the object hit is greater than the distance between the camera and SP2.

 

This is a very good idea, Let me try...

 

There is an easy way to "raycast the opposite direction of the camera"?

 

This is the solution:

To get a ray from point A in the direction of point B you can use point A as origin and (pointB - pointA).normalized as the direction

 

Yeah that sounds about right