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zaoo's profile
Lars Viklund
Lars Viklund
Lars Viklund
@zaoo

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Lars Viklund

@zaoo

Pretend game/graphics/C++ programmer at night. HPC and clooooooud admin during day.

Sweden
Joined May 2008

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    1.  🏳️‍🌈Douglas 🏳️‍🌈‏ @D_M_Gregory Sep 23

      Visualizing floating point precision loss, or "why #gamedev stuff behaves badly far from the origin" The blue dot is end of the desired vector. The black dot snaps to the closest representable point (in a simplified floating point grid with only 4 mantissa bits)pic.twitter.com/o1HKYByIbS

      51 replies 1,349 retweets 3,922 likes
      Show this thread
    2. Peter Budziszewski‏ @p_budziszewski Sep 23
      Replying to @D_M_Gregory @gafferongames

      Lol who uses floats for absolute coordinates?

      1 reply 0 retweets 1 like
    3.  🏳️‍🌈Douglas 🏳️‍🌈‏ @D_M_Gregory Sep 23
      Replying to @p_budziszewski

      Folks whose levels are only a few km wide? Floating point is actually pretty darn good over a very wide range of common magnitudes used in games. It's usually only once we start getting into open world or space games that we need to be more careful with absolute positions.

      1 reply 0 retweets 10 likes
    4. Peter Budziszewski‏ @p_budziszewski Sep 23
      Replying to @D_M_Gregory

      The precision might be adequate but it's not consistent. Personally I think using floats for absolute world coordinates is sloppy. It's not like fixed point is rocket science.

      2 replies 0 retweets 0 likes
      Lars Viklund‏ @zaoo Sep 24
      Replying to @p_budziszewski @D_M_Gregory

      On this subject, this debugging mystery story from The Witness was quite a fun read: https://caseymuratori.com/blog_0007 https://caseymuratori.com/blog_0008 

      8:20 AM - 24 Sep 2018
      • 1 Like
      • 🏳️‍🌈Douglas🏳️‍🌈
      0 replies 0 retweets 1 like

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