If I have the following vector { x, y, z, w }
, what role does w
have in calculations such as dot product, cross product, vector addition / subtraction, etc. I'm just a bit confused as to whether it should be included in calculations or not.
What role does the last element of a 3D homogenous vector have?
2
$\begingroup$
geometry
vector-spaces
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3What do you mean? Are you talking about 3 dimensional *projective* space? – 2012-11-30
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0Why does it make a difference if it's projective, or orthagonal, etc? I'm looking at this from a computer science point of view. – 2012-11-30