Moving Line with Collider

I am trying to make a line that goes in betwen a static point on the screen to the current mouse position(updated in every frame). There are several objects also put in the game space so I want if the line touches any of those objects to print a message to the console. To be exact it does not to be a real line but anything that would cause the same effect would be just as fine. Can someone give me an idea of what is the best way to achieve this? I am using Unity 4.6.9 but I can update to 5 if needed.