I am trying to understand how light works in computer graphics. Especially OpenGL 3+. So I was given a paper that says how to calculate light. It says "normalise the vectors(adsbygoogle = window.adsbygoogle || []).push({});

before taking the dot product".How do I normalize vectors and why? I have to compute the normals to a vertex. What is a normal to a vertex? How can I visualise it?

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# Normalizing Vectors and Light in Computer Graphics

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