Photography Subject Placement

3 point Light Placement ?
Hi,
I know that the placement of the lights is in a 45 degree angle but my question is, is it 45 degrees in relation to the face of the subject or in relation to where the camera is placed? cause it makes a huge difference.
Im new to photography
Thanks a lot.
Here's a good reference
http://www.professionalphotography101.com/portrait_lighting/lighting_names.html
Portrait Photography Lighting Techniques : Portrait Photography Lighting: Subject Placement