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### #ActualMussi

Posted 09 August 2012 - 03:43 PM

So the final advice is to normalize every vector that I use in dot product no matter what?

No, there are plenty of cases where you don't want to normalize a vector used in a dot product. It depends on what you're trying to do. In this case you're interested in the angle between the vectors, the dot product of two normalized vectors gives you the cosine of that angle. So in this case, you want both vectors to be normalized.

### #2Mussi

Posted 09 August 2012 - 03:42 PM

So the final advice is to normalize every vector that I use in dot product no matter what?

No, there are plenty of cases where you don't want to normalize a vector used in a dot product. It depends on what you're trying to do. In this case you're interested in the angle between the vectors, the dot product of two normalized vectors gives you the cosine of that angle.

### #1Mussi

Posted 09 August 2012 - 03:41 PM

So the final advice is to normalize every vector that I use in dot product no matter what?

No, there are plenty of cases where you don't want to normalize a vector used in a dot product. It depends on what you're trying to do. In this case you're interested in the angle between the vectors, the dot product of two normalized vectors gives you the cosine of the angle in between.

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