3 ms·

Why must the velocity vector have a constant length?

• CydeWeys 3y ago
  Now that's the billion dollar question, isn't it. But it's true.
• numpad0 3y ago
  So to preoccupy your mind with simulation hypothesis and inter-node bandwidth estimation for the cluster we’re on. edit: wait, if the Vector4.magnitude == 1, are dense objects actually just fast/hot?
  • anticensor 3y ago
    With constant magnitude vectors, you can eliminate one of the numbers out of the motion simulation for each particle. Huge optimisation indeed.
• magicalhippo 3y ago
  As the sibling comment alludes to, it's otherwise they wouldn't behave according to what we measure. For a deeper "why", see Feynman[1]. edit: it's related to how spacetime with a finite speed of light is represented mathematically. There's some discussion here[2] which might shed some light. [1]: https://fs.blog/richard-feynman-on-why-questions/ https://fs.blog/richard-feynman-on-why-questions/ [2]: https://en.wikipedia.org/wiki/Imaginary_time#In_cosmology https://en.wikipedia.org/wiki/Imaginary_time#In_cosmology
  • deleted 3y ago
    [deleted]