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*****Cross Products*********
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                                                                                                                        B
     Normal- a vector that is orthogonal (basically perpendicular) to the curvature of the surface in a model.    |   | .\|   |   |
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                                                                                                                  |  /|   |  \|   |
                                                                                                                  | .-|---|---|\. |
             Helps determine the lighting and reflections.                                                           A           C

     Vector V * Vector W = Vector U
     Given two vectors, if multiplied (crossed), you find a vector that is orthogonal to the original vectors
     Be aware that crossing is direction sensitive, it matters if light reflects off the inside or outside
     of the surfaces.
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     See the first attachment for diagrams and equations
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     Cull-Backfaces- If the normal and the viewing direction are similar (dot product > 0) then the face is
     backwards facing and can be culled.