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cmuratori's profile
Casey Muratori
Casey Muratori
Casey Muratori
@cmuratori

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Casey Muratori

@cmuratori

I'm worried that the baby thinks people can't change.

Seattle
caseymuratori.com
Joined March 2009

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    1. Freya Holmér‏ @FreyaHolmer 23 Sep 2019

      📏Lerp vs Slerp⭕ • Lerp interpolates in a straight line • useful for interpolating positions • Slerp rotates around (0,0) • useful for interpolating directions #unitytipspic.twitter.com/KSQQWCb5f4

      49 replies 903 retweets 4,737 likes
      Show this thread
    2. Freya Holmér‏ @FreyaHolmer 23 Sep 2019

      "But can't I just use lerp and normalize instead of slerp?" for small angles, it might be good enough, but for large angles, their directions actually deviate quite a lot here they are superimposed!pic.twitter.com/vjYeh2MIqw

      10 replies 41 retweets 463 likes
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    3. Casey Muratori‏ @cmuratori 23 Sep 2019
      Replying to @FreyaHolmer

      This diagram is not correct. The direction deviation in quaternion space is not the same magnitude as the deviation in rotation space. Quaternions are a non-linear transform (and are double covered) so errors in quaternion space map to smaller errors in perceived rotation.

      1 reply 0 retweets 0 likes
    4. Freya Holmér‏ @FreyaHolmer 23 Sep 2019
      Replying to @cmuratori

      It's visualizing Vector Lerp vs Vector Slerp, not quaternion slerp :)

      1 reply 0 retweets 1 like
      Casey Muratori‏ @cmuratori 23 Sep 2019
      Replying to @FreyaHolmer

      How odd - so Unity has a SLERP operation for non-quaternions?

      11:40 AM - 23 Sep 2019
      1 reply 0 retweets 0 likes
        1. New conversation
        2. Freya Holmér‏ @FreyaHolmer 23 Sep 2019
          Replying to @cmuratori

          Yep! https://docs.unity3d.com/ScriptReference/Vector3.Slerp.html …

          2 replies 0 retweets 0 likes
        3. Tom Forsyth‏ @tom_forsyth 23 Sep 2019
          Replying to @FreyaHolmer @cmuratori

          Any chance of a quaternion version (or all three superimposed)? The lerp-vs-slerp argument comes up so much and I really don't want people sending this around, coz having to "actually" something always sucks.

          1 reply 0 retweets 0 likes
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