<function name="DotProduct" parent="Vector" type="classfunc"> <description><deprecated>This is an alias of <page>Vector:Dot</page>. Use that instead.</deprecated>Returns the dot product of the two vectors.</description> <realm>Shared</realm> <args> <arg name="Vector" type="Vector">The other vector.</arg> </args> <rets> <ret name="" type="number">Dot Product</ret> </rets> </function> <example> <description>A function to make sure the player is looking somewhere.</description> <code> function IsLookingAt( ply, targetVec ) return ply:GetAimVector():DotProduct( ( targetVec - ply:GetPos() + Vector(70) ):GetNormalized() ) &amp;lt; 0.95 return ply:GetAimVector():DotProduct( ( targetVec - ply:GetPos() + Vector(70) ):GetNormalized() ) &lt; 0.95 end </code> <output>Returns true if ply is looking at (or close to) the target.</output> </example>